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Publisher: Springer-Verlag   (Total: 2300 journals)

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Tijdschrift voor Urologie     Hybrid Journal  
Tissue Engineering and Regenerative Medicine     Hybrid Journal   (Followers: 6)
TOP     Hybrid Journal   (Followers: 1, SJR: 0.578, h-index: 6)
Topics in Catalysis     Hybrid Journal   (Followers: 1, SJR: 1.042, h-index: 64)
Topoi     Hybrid Journal   (Followers: 3, SJR: 0.378, h-index: 9)
Toxicology and Environmental Health Sciences     Hybrid Journal   (Followers: 3, SJR: 0.161, h-index: 4)
Transactions of the Indian Institute of Metals     Hybrid Journal   (Followers: 2, SJR: 0.283, h-index: 11)
Transformation Groups     Hybrid Journal   (SJR: 1.067, h-index: 18)
Transgenic Research     Hybrid Journal   (Followers: 4, SJR: 0.702, h-index: 52)
Transition Metal Chemistry     Hybrid Journal   (Followers: 1, SJR: 0.342, h-index: 40)
Transition Studies Review     Hybrid Journal   (Followers: 1, SJR: 0.212, h-index: 5)
Translational Behavioral Medicine     Partially Free   (Followers: 1, SJR: 0.33, h-index: 4)
Translational Neuroscience     Hybrid Journal   (Followers: 2, SJR: 0.264, h-index: 4)
Translational Stroke Research     Hybrid Journal   (Followers: 3, SJR: 0.499, h-index: 8)
Transport in Porous Media     Hybrid Journal   (Followers: 1, SJR: 0.904, h-index: 42)
Transportation     Hybrid Journal   (Followers: 17, SJR: 1.259, h-index: 37)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 5)
Trauma und Berufskrankheit     Hybrid Journal   (SJR: 0.131, h-index: 5)
Tree Genetics & Genomes     Hybrid Journal   (Followers: 2, SJR: 0.874, h-index: 25)
Trees     Hybrid Journal   (Followers: 5, SJR: 0.703, h-index: 48)
Trends in Organized Crime     Hybrid Journal   (Followers: 6, SJR: 0.482, h-index: 8)
Tribology Letters     Hybrid Journal   (Followers: 3, SJR: 1.119, h-index: 51)
Tropical Animal Health and Production     Hybrid Journal   (Followers: 4, SJR: 0.555, h-index: 23)
Tropical Plant Biology     Hybrid Journal   (Followers: 2, SJR: 0.492, h-index: 7)
Tropical Plant Pathology     Hybrid Journal   (Followers: 3, SJR: 0.39, h-index: 6)
Tumor Biology     Hybrid Journal   (Followers: 4, SJR: 0.813, h-index: 40)
Ukrainian Mathematical J.     Hybrid Journal   (SJR: 0.272, h-index: 9)
Universal Access in the Information Society     Hybrid Journal   (Followers: 98, SJR: 0.542, h-index: 16)
Updates in Surgery     Hybrid Journal   (Followers: 3, SJR: 0.44, h-index: 6)
Urban Ecosystems     Hybrid Journal   (Followers: 10, SJR: 0.573, h-index: 18)
Urban Forum     Hybrid Journal   (Followers: 5, SJR: 0.627, h-index: 7)
Uro-News     Hybrid Journal  
Urolithiasis     Hybrid Journal   (Followers: 3, SJR: 0.55, h-index: 38)
Urologic Radiology     Hybrid Journal   (Followers: 1)
User Modeling and User-Adapted Interaction     Hybrid Journal   (Followers: 5, SJR: 2.244, h-index: 39)
uwf UmweltWirtschaftsForum     Hybrid Journal  
Vegetation History and Archaeobotany     Hybrid Journal   (Followers: 3, SJR: 0.861, h-index: 33)
Verslaving     Hybrid Journal  
Vestnik St. Petersburg University: Mathematics     Hybrid Journal   (SJR: 0.211, h-index: 3)
Veterinary Research Communications     Hybrid Journal   (Followers: 2, SJR: 0.436, h-index: 30)
Vietnam J. of Mathematics     Hybrid Journal   (Followers: 1)
Virchows Archiv     Hybrid Journal   (Followers: 1, SJR: 0.976, h-index: 69)
Virologica Sinica     Hybrid Journal   (SJR: 0.261, h-index: 7)
Virtual Reality     Hybrid Journal   (Followers: 3, SJR: 0.394, h-index: 21)
Virus Genes     Hybrid Journal   (Followers: 1, SJR: 0.649, h-index: 40)
Visual Geosciences     Hybrid Journal  
Vocations and Learning     Hybrid Journal   (Followers: 5, SJR: 0.361, h-index: 5)
Voluntas: Intl. J. of Voluntary and Nonprofit Organizations     Hybrid Journal   (Followers: 8, SJR: 0.322, h-index: 19)
Waste and Biomass Valorization     Hybrid Journal   (Followers: 1, SJR: 0.636, h-index: 7)
Water History     Hybrid Journal   (Followers: 3, SJR: 0.118, h-index: 3)
Water Quality, Exposure and Health     Hybrid Journal   (Followers: 3, SJR: 0.158, h-index: 2)
Water Resources     Hybrid Journal   (Followers: 13, SJR: 0.269, h-index: 8)
Water Resources Management     Hybrid Journal   (Followers: 14, SJR: 1.075, h-index: 39)
Water, Air, & Soil Pollution     Hybrid Journal   (Followers: 19, SJR: 0.734, h-index: 64)
Water, Air, & Soil Pollution : Focus     Hybrid Journal   (Followers: 8)
Welding in the World     Hybrid Journal   (Followers: 3, SJR: 0.389, h-index: 16)
Wetlands     Hybrid Journal   (Followers: 14, SJR: 0.596, h-index: 50)
Wetlands Ecology and Management     Hybrid Journal   (Followers: 7, SJR: 0.551, h-index: 33)
Wiener klinische Wochenschrift     Hybrid Journal   (SJR: 0.275, h-index: 34)
Wiener klinische Wochenschrift Education     Hybrid Journal  
Wiener Klinisches Magazin     Hybrid Journal  
Wiener Medizinische Wochenschrift     Hybrid Journal  
Wireless Networks     Hybrid Journal   (Followers: 8, SJR: 0.874, h-index: 61)
Wireless Personal Communications     Hybrid Journal   (Followers: 5, SJR: 0.394, h-index: 27)
Wirtschaftsdienst     Hybrid Journal   (Followers: 3, SJR: 0.209, h-index: 4)
WIRTSCHAFTSINFORMATIK     Hybrid Journal   (Followers: 2)
Wirtschaftsrechtliche Blätter     Hybrid Journal   (Followers: 2)
wissen kompakt     Hybrid Journal  
WMU J. of Maritime Affairs     Hybrid Journal   (Followers: 2)
Wohnrechtliche Blätter     Hybrid Journal  
Wood Science and Technology     Hybrid Journal   (Followers: 2, SJR: 0.718, h-index: 38)
World J. of Microbiology and Biotechnology     Hybrid Journal   (Followers: 3, SJR: 0.533, h-index: 44)
World J. of Pediatrics     Hybrid Journal   (Followers: 1, SJR: 0.373, h-index: 11)
World J. of Surgery     Hybrid Journal   (Followers: 6, SJR: 0.983, h-index: 97)
World J. of Urology     Hybrid Journal   (Followers: 1, SJR: 1.113, h-index: 53)
World Wide Web     Hybrid Journal   (Followers: 11, SJR: 1.207, h-index: 18)
Wuhan University J. of Natural Sciences     Hybrid Journal   (SJR: 0.169, h-index: 11)
ZDM     Hybrid Journal   (SJR: 0.26, h-index: 12)
Zeitschrift für angewandte Mathematik und Physik     Hybrid Journal   (Followers: 1, SJR: 0.666, h-index: 34)
Zeitschrift für Außen- und Sicherheitspolitik     Hybrid Journal   (Followers: 7)
Zeitschrift für Bildungsforschung     Hybrid Journal  
Zeitschrift für Didaktik der Naturwissenschaften     Hybrid Journal  
Zeitschrift für die gesamte Versicherungswissenschaft     Hybrid Journal   (SJR: 0.195, h-index: 2)
Zeitschrift fur Energiewirtschaft     Hybrid Journal   (Followers: 1)
Zeitschrift für Epileptologie     Hybrid Journal   (SJR: 0.135, h-index: 3)
Zeitschrift für Erziehungswissenschaft     Hybrid Journal   (Followers: 6, SJR: 0.395, h-index: 5)
Zeitschrift für Europäisches Unternehmens- und Verbraucherrecht     Hybrid Journal   (Followers: 1)
Zeitschrift fur Gerontologie und Geriatrie     Hybrid Journal   (Followers: 1, SJR: 0.196, h-index: 24)
Zeitschrift für Herz-,Thorax- und Gefäßchirurgie     Hybrid Journal   (Followers: 1, SJR: 0.125, h-index: 5)
Zeitschrift für Hochschulrecht, Hochschulmanagement und Hochschulpolitik: zfhr     Hybrid Journal   (Followers: 3)
Zeitschrift fur Management     Hybrid Journal   (Followers: 2)
Zeitschrift für öffentliches Recht     Hybrid Journal   (Followers: 15)
Zeitschrift für Politikberatung     Hybrid Journal   (Followers: 1)
Zeitschrift für Psychodrama und Soziometrie     Hybrid Journal  
Zeitschrift fur Rheumatologie     Hybrid Journal   (Followers: 2, SJR: 0.15, h-index: 31)
Zeitschrift für Vergleichende Politikwissenschaft     Hybrid Journal   (Followers: 6)
Zentralblatt für Arbeitsmedizin, Arbeitsschutz und Ergonomie. Mit Beiträgen aus Umweltmedizin und Sozialmedizin     Full-text available via subscription  
Zoological Letters     Open Access  
Zoomorphology     Hybrid Journal   (Followers: 2, SJR: 0.417, h-index: 24)
Zorg en Financiering     Hybrid Journal  

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Journal Cover   Journal of Material Cycles and Waste Management
  [SJR: 0.327]   [H-I: 13]   [4 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1611-8227 - ISSN (Online) 1438-4957
   Published by Springer-Verlag Homepage  [2300 journals]
  • Global Environment Facility’s support for sustainable waste
           management
    • Abstract: Abstract From the global perspective, the issue of waste management is becoming increasingly important. Given the increasing amount and diversifying content of waste, countries should seek out sustainable waste management options, which protect both local and global environments. The Global Environment Facility (GEF), a public financial institution, has supported sustainable waste management in developing countries in achieving global environmental benefits. The GEF’s support for sustainable waste management, from its pilot phase to the end of the fifth replenishment period, has amounted to 118 projects across the globe. Harmful chemicals, such as polychlorinated biphenyls (PCBs), and “waste to energy” initiatives have been the main focuses of the GEF’s support. The GEF’s investment in sustainable waste management has increased in recent years, partly due to the fact that countries are required to manage Persistent Organic Pollutant (POP) wastes in an environmentally safe manner in compliance with the Stockholm Convention on POPs. The GEF is poised to enhance its support for sustainable waste management in the future by mobilizing other financing, integrating multiple focal areas, expanding viewpoints to sustainable cities, and reinforcing its results-based management.
      PubDate: 2015-03-04
       
  • Estimating industrial solid waste and municipal solid waste data at high
           resolution using economic accounts: an input–output approach with
           Australian case study
    • Abstract: Abstract In publicly available waste reports only the totals of waste produced for municipal, or industry waste typically feature. The types of waste generated and the generating industry sector are usually omitted. We propose the direct inputs waste estimation methodology to create a detailed estimate of municipal solid waste and industrial solid waste for an economy (including sectoral and waste type disaggregation) using a top-down estimation methodology that links the aforementioned limited publicly available waste data with an input–output table’s direct inputs (A) matrix. We then provide an application of the direct inputs waste estimation methodology upon the 2008 waste generation of Australia resulting in a 344 industry sector and 14 waste type data set. The resulting estimation gives unique insights into Australian waste generation; including the large C&I tonnages of waste estimated to be produced from the Service sectors such as the Education, Hospitality, and Health sectors as well as the large amount of food waste produced throughout the economy.
      PubDate: 2015-03-01
       
  • Experimental study of rubber tire aggregates effect on compressive and
           dynamic load-bearing properties of cylindrical concrete specimens
    • Abstract: Abstract Sustainable development has become a major focus for engineers and planners as part of their collective efforts in finding, developing and integrating environmental-friendly solutions for material recycling and waste management into design and construction of civil engineering infrastructure. In the past three decades, there has been an increase in recycling and application of waste materials into the concrete to decrease costs and improve material properties of the concrete. Significant growth in automobile manufacturing industry and increased rubber tire supply for vehicles suggested the application of waste tire particles as concrete aggregates to minimize the ecological footprint of the rubber tire waste due to its recycling process difficulties. In this paper, the effect of rubber tire particles on compressive and dynamic strength of concrete specimens with different particle percentiles was tested on more than 55 cylindrical specimens. To achieve the optimal mix design properties of rubber tire concrete specimens, both fine and coarse aggregates got replaced by fine and coarse rubber particles. Introduction of rubber tire particles as coarse and fine aggregate reduces the brittleness of the concrete and provides more flexible aggregate bonding which ultimately improves the dynamic resistance of the concrete. It increases the concrete workability and provides environmental-friendly and cost-effective solutions in using recycled materials for concrete construction applications.
      PubDate: 2015-02-24
       
  • Rare earth element recovery potentials from end-of-life hybrid electric
           vehicle components in 2010–2030
    • Abstract: Abstract Increasing attention is currently given to the management of end-of-life (EoL) hybrid electric vehicles (HEVs), because approximately two decades have passed since they were first introduced to the market. A HEV would be one of the largest consumers of rare earth elements (REEs), and hence represents the greatest potential for REE recovery in the future. The purpose of this study is to clarify the present and future recovery potential of REEs that are disposed of as EoL HEVs. This study first estimated the numbers of EoL HEVs during fiscal years (FYs) 2010–2030, and then clarified the potential for recovery of REEs from two HEV-specific components—the hybrid transmission and NiMH battery unit. The results suggest that 0.51–0.65 million HEVs will reach the EoL stage in FY2030, compared with only 11,000 HEVs in FY2010. As of FY2030, REE recovery potentials will increase to 220 tons and 2900 tons for EoL hybrid transmission and NiMH battery units, respectively. A total of 49,000 tons of REEs will be contained within HEV-specific components of HEVs still in use. Moreover, the potential for recovery of REEs from EoL hybrid transmissions and NiMH battery units is estimated to equal 35.4 and 92.1 % of respective demand.
      PubDate: 2015-02-19
       
  • Recycling rate and target setting: challenges for standardized measurement
    • Abstract: Abstract The recycling rate is one of the most widely used indicators for monitoring progress in waste recycling and resource-saving activities. Basically, the recycling rate is calculated as the proportional value (%) of waste recycled from the total waste generated. An increase in this indicator usually means that the progress is being made in recycling activities. However, many countries define and calculate the recycling rate in many different ways. Recycling rates take many forms and levels of waste recovered, such as recovery rate, collection rate, diversion rate, and cyclic use rate. Such diverse definitions and lack of standardized measurements for the recycling rate often require careful treating of the recycling rate value to avoid incorrect or confusing comparison and interpretation. In the Asian context, disparities in defining the recycling rate are even more pronounced. This is mainly because of the prevalent presence of informal recycling sector in Asia, which often go unrecorded. This paper highlights the need for a standardized measurement of recycling rate in Asia for careful target setting of 3R policy and monitoring the progress of 3R in the region.
      PubDate: 2015-02-18
       
  • Destruction of organic Cl and Br compounds through incineration enhanced
           by alkali and alumina addition
    • Abstract: Abstract Thermochemical destruction of organic Cl and Br compounds in a combustion system was studied. A Cl compound and three Br compounds, namely, 1,2,3,4-tetrachlorobenzene (TeCB), 1,2,4,5-tetrabromobenzene (TeBB), tetrabromobisphenol A (TBBPA), and decabromodiphenyl ether (DBDE) were used. The samples on a boat were combusted at 600 °C followed by gas combustion at 800, 900, and 1,100 °C. An off-gas was adsorptively collected and introduced into a Cl and Br detector by thermal desorption. The destruction efficiency was evaluated using the organic halogen residual ratio (OX-RR) (μg g−1). Halogenated benzene compounds such as TeCB and TeBB were destructed moderately (OX-RR for these compounds at 800, 900 and 1,100 °C was 112, 35 and 32 μg g−1 and 258, 57 and 48 μg g−1, respectively); on the other hand, the destruction of TBBPA and DBDE, namely fire retardants, was difficult (OX-RR at 800 °C for these compounds was 7,159 and 718 μg g−1, respectively). Addition of an alkali and an alumina to a sample enhanced the destruction of organic compounds drastically by several times. This destruction enhancement occurred at temperature as low as 600 °C. Such chemical halogen control is effective to thermal destruction of organic Cl and Br compounds.
      PubDate: 2015-02-15
       
  • Quantitative analysis of food products allocation into food consumption
           styles for material flow analysis of food
    • Abstract: Abstract To provide effective food and food waste policies, it is necessary to quantitatively assess food and food waste flows. Expenditure has been previously used for calculating allocation factors for material flow analysis, but using the price of food products for quantitative study is inadequate because price also encompasses the cost of food processing and services. In this study, weight-based food allocation factors were calculated based on consumption style to provide the first step for future material flow analysis of food. We used Family Income and Expenditure Survey data, unit price data, composition of food items data, and food weight change from cooking. As a result, the allocation factors of food products for meals at home, convenience meals, and meals outside the home were calculated to be 81, 8, and 11 %, respectively. It differs largely from expenditure-based allocation factors. To verify these findings, we calculated material cost ratios for food prices using the gap between weight-based and expenditure-based allocation factors, and compared the results with actual material cost ratios. The results of this study are expected to be used for tracing food and food waste flows and also for evaluating food consumption’s impact on the environment.
      PubDate: 2015-02-12
       
  • Future sewage sludge generation and sewer pipeline extension in
           economically developing ASEAN countries
    • Abstract: Abstract Levels of future generation of sewage sludge must be ascertained to ensure safe and effective waste management, particularly for economically developing countries such as those of the Association of Southeast Asian Nations (ASEAN), where wastewater treatment will increase profoundly in the near future. This study estimated the quantity of sewage sludge generation in ASEAN during 2010–2050. Parameters used in the scenario analysis include population (P), per-capita gross domestic product (GDPpc), rate of population in residences connected to wastewater treatment plants (P wwtp %), and sewage sludge generation per capita (SSpc). High sewerage penetration scenarios indicate that the sewage sludge in the ASEAN countries is expected to increase to 24–40 million tonnes per annum (Mt/a) by 2050. Indonesia might contribute the greatest amount of 17.04 Mt/a at mid-century, followed by the Philippines and Vietnam. Because of its small population, Brunei Darussalam will contribute the least. Sewage pipeline length has also been estimated. High-penetration scenarios indicate that the sewer network in ASEAN will surge to 2.3–7 million km long. Because sewage sludge management and development of wastewater infrastructure will play important roles in the ASEAN region, these findings will be informative for wastewater management policies and practices in Southeast Asia.
      PubDate: 2015-02-05
       
  • Empirical analysis of reward to return: based on case studies of lunch
           boxes in Japan
    • Abstract: Abstract To recycle or reuse used containers, it is necessary first to collect them. One way to do this is to give rewards to persons who return used packaging and containers to designated places. Many Japanese university cooperatives use recyclable lunch boxes for take-out food, and they collect used boxes in a variety of ways, including such reward giving. By analyzing the responses of university cooperatives to questionnaires on the ways that they collect used recyclable lunch boxes, this study examines the effect of this reward giving on the collection rate. The study results suggest that cash rewards are more effective in increasing the rate of return of used containers than setting up collection boxes that offer no rewards upon return, or giving point-based rewards.
      PubDate: 2015-02-05
       
  • Revisiting estimates of municipal solid waste generation per capita and
           their reliability
    • Abstract: Abstract Per capita municipal solid waste (MSW) generation, a core indicator of environmental pressure, is a useful measure for evaluating the intensity of waste generation over time and comparing the intensities among cities or countries. We provide an overview of global data on MSW generation per capita at the national and local levels. Although the legal definition of MSW varies from country to country, we conceptualize MSW simply as the waste managed by or for municipalities as a public service. We note the current challenges in estimating MSW generation per capita in developing countries, including a lack of equipment (e.g., weighbridges), lower rates of MSW collection efficiency, and rural–urban migration, all of which may have negative effects on data reliability. Incomplete data compilation systems at the national level also result in lower reliability and reduce the comparability of national data. We suggest technical solutions for estimating MSW generation per capita at the local and national levels to improve reliability and comparability of data.
      PubDate: 2015-02-05
       
  • Heavy metal mobility and potential availability in animal manure: using a
           sequential extraction procedure
    • Abstract: Abstract In this study, dairy cow manure, goat manure, and chicken manure were collected from three farms and analyzed to find out the concentration of Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn. The concentration and potential of mobility and availability of heavy metals were studied in the animal manure samples. BCR Sequential extraction procedure was used to determine the binding forms of the metals. In this study, pseudo total concentrations of Mn and Zn were found out to be predominant in all the types of animal manure samples. According to the results, it was traced that Cr, Cu, and Ni were observed to be at the second highest level while Cd, Co, and Pb were seen at the lowest level in all the manure samples. When extractable amounts of heavy metals are taken into consideration, it is seen that the amount of the mobile fractions of heavy metals except for Cr and Ni are higher in comparison with that of immobile fraction in all the animal manure samples. It was also viewed that Mn, Cd, and Zn are more available in dairy cow manure and chicken manure whereas Cd, Co, and Mn are more available in goat manure.
      PubDate: 2015-01-22
       
  • Quantifying the distribution of critical metals in conventional passenger
           vehicles using input-driven and output-driven approaches: a comparative
           study
    • Abstract: Abstract Critical metals are used increasingly in vehicle manufacturing. For more sustainable use of these metals, it is important to understand their distribution in vehicles. In this paper, we present a comparative study examining the distribution of critical metals in conventional passenger vehicles. We identified two existing approaches to estimate the amounts of critical metals used in one passenger vehicle: input-driven and output-driven approach, and compared the results of 25 metals among five studies. In general, the results were found to be scattered. Cu, Mn, Sr and Sb were found with the highest median masses per vehicle. The median masses of eight metals (Nb, Zr, Co, La, Mo, Nd, Ce, and Ag in descending order) were around or below 10 g per vehicle and those of 13 metals (Pd, Ta, Pr, Ga, Sm, Y, W, Au, Gd, Dy, In, Pt, and Tb in descending order) were below 1 g per vehicle. Top three subsystems and parts containing the largest mass of critical metals in sum were presented. Our research provides a consolidated summary of existing information on the critical metal distribution in conventional passenger vehicles and suggests improvements for future studies on this topic.
      PubDate: 2015-01-21
       
  • Preparation of MgCr 2 O 4 from waste tannery solution and effect of
           sulfate, chloride, and calcium on leachability of chromium
    • Abstract: Abstract This paper presents a study regarding the preparation of MgCr2O4 from waste tannery solution, and chromium leaching behavior is also investigated with varying amounts of sulfate, chloride and calcium. The phase transformation, crystallinity index and crystallite diameter were characterized using XRD, FT-IR and thermal analysis. A well-crystallized MgCr2O4 was successfully prepared at 1400 °C. The sintering temperature had a major impact on the formation of MgCr2O4 compared with sintering time. The MgCr2O4 phase was observed initially at 400 °C and its crystallite diameter increased with increasing temperature. The concentration of total chromium leached and Cr(VI) decreased gradually with increasing temperature. The considerable amount of Cr(VI) was found in the leachate at 300–500 °C caused by Cr(VI) intermediary products. Sulfate and chlorine could impact the transformation efficiency of chromium adversely, and chlorine has a more significant effect than sulfate. The presence of calcium disturbed the formation of MgCr2O4 and new chromium species (CaCrO4) appeared, which resulted in a sharp increase in the concentration of leached Cr(VI). Incorporating Cr(III) into the MgCr2O4 spinel for reusable products reduced its mobility significantly. This was demonstrated to be a promising strategy for the disposal of chromium containing waste resource.
      PubDate: 2015-01-21
       
  • Recycling of cathode ray tube panel glasses as aggregates of concrete
           blocks and clay bricks
    • Abstract: Abstract While the cathode ray tube (CRT) funnel containing lead could be transported to a smelting facility to recover lead, which could be an available option in domestic, a proper technology to recycle a CRT panel must be developed. Thus, it was suggested that CRT panel glass be used as aggregates of concrete blocks and clay bricks. Samples of blocks and bricks were fabricated with CRT powders and tested to measure their strength and absorption rate to determine their qualities, and environmental soundness was determined by measuring the leaching rate of hazardous metals. For concrete blocks, CRT panel glass powders incorporated as aggregates up to 40 % replacing stone powder was proposed as the proper condition for manufacturing blocks. Around 2 % of CRT panel incorporated into clay brick to substitute Kaoline was suggested to fabricate the best quality of clay brick. Results of leaching test met the criteria with much less concentration of hazardous metals, even lead compound containing in the CRT funnel. To conclude, the use of CRT panel powder after crushing it to the proper size as an aggregate of concrete blocks or clay bricks could be one of the appropriate alternatives to recycle for CRT glass waste being generated drastically in a short term.
      PubDate: 2015-01-20
       
  • The application and evaluation research of coffee residue ash into mortar
    • Abstract: Abstract Coffee residue is usually regarded as a kind of agriculture waste; as its quantity increases the treatment of coffee residue will become an environmental problem. This research is innovative in that it derives the possibility of recycle application using coffee residue ash for cement replacement. In this research, coffee residue is burned in an electronic oven to three kinds of coffee residue ash at 500, 600 and 700 °C, and then appropriate apparatus is used to check the chemical and physical properties of these three types of coffee residue ash. After a general comparison, this study selected 500 and 600 °C coffee residue ashes with 2, 3, 5, 10 and 15 % cement replacements to make 5 cm3 cube mortar specimen to test different curing ages’ compressive strength. Through measurement and experiment, this research found that the compressive strength decreased by adding 500 or 600 °C coffee residue ash into the mortar. By considering waste reduction and practice application, this research derives that using the 600 °C coffee residue ash with 10 % replacement is better than others application, such using result also can get valuable efficiencies of financial and CO2 reduction.
      PubDate: 2015-01-17
       
  • Recycling of combined coal-biomass ash from electric power plant waste as
           a cementitious material: characteristics and improvement
    • Abstract: Abstract Combined coal-biomass ash has an enormous impact on environmental quality near electric power plants. This paper describes an alternative to disposal in which the ash is used to produce cementitious materials. Ash was obtained from combustion of coal and biomass containing four mass ratios of anthracite, bitumen, rice husks, and eucalyptus bark. The cement-forming properties were systematically characterized including compressive strength development, durability, and expansion in water. The ash samples were ground to increase the specific surface area, and then used to partially replace ASTM Type I Portland cement in mixtures containing 15, 30, or 45 % ash by mass. The water-binder material's (Portland cement with or without combined coal-biomass ash) ratios (w/c) were held constant at 45, 55, or 65 % by mass. Types A, B, and D ash behaved similarly, while the properties of type C ash were slightly different. Increasing the ash fraction in Portland cement mixtures increased the water requirement and resulted in lower compressive strength. Thorough mechanical grinding reduced the porosity and significantly enhanced the material properties.
      PubDate: 2015-01-06
       
  • Effects of sintering temperature on the characteristics of solar panel
           waste glass in the production of ceramic tiles
    • Abstract: Abstract This study employs the following operating conditions: constant pressure (5 MPa), sintering temperature (800–1100 °C), sintering time (2 h), percentage of solar panel waste glass by weight (0–40 %), and the rate of heating was 5 °C/min, to fabricate clay tiles. The sintered samples were characterized to determine their porosity, water absorption, and mechanical strength. Fired samples were microstructurally analyzed by X-ray diffraction and scanning electron microscopy. Increasing the temperature resulted in a rise in the resistance to abrasion in the tiles. Solar panel waste glass promotes a more effective melting of quartz, leading to a more abundant and less viscous liquid phase, which accelerates the sintering kinetics. In conclusion, solar panel waste glass can be used at 30–40 % with tolerable modifications of the technological behavior and performance of ceramic tiles. Solar panel waste glass has a high content of total fluxing oxides that favor the maturation of the ceramic tile at lower sintering temperatures. Therefore, this waste glass is a good substitute for feldspar in stoneware tile products, as it satisfies the most demanding requirements of the CNS 3299 standard.
      PubDate: 2015-01-01
       
  • Evaluation of solid product obtained from tire-derived fuel (TDF)
           pyrolysis as carbon black
    • Abstract: Abstract The main focus of this study was quality improvement of solid product obtained from tire-derived fuel (TDF) pyrolysis to use it as a substitute for commercial carbon blacks. First of all, TDF samples were analyzed by means of proximate and ultimate analysis, heating value, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. They were then pyrolyzed at a 400 °C pyrolysis temperature with 5 °C/min heating rate. After that, a two-stage improvement was performed on solid product to reduce its sulfur and ash content to that of commercial carbon black. As a result of this improvement process, the sulfur and ash content of the solid product was reduced to 0.22 and 0.27 % from 1.71 and 12.14 %, respectively. In addition, the XRD, SEM, atomic force microscopy, Brunauer–Emmett–Teller surface area, oil adsorption number and ICP-MS/MS analyses were performed for all products. The results were compared with different commercial carbon blacks. It was determined that the properties of the improved products were similar to those of commercial carbon blacks. These results suggest that improved pyrolytic product of TDF can be used as a raw material by industries such as tire, plastic and paint manufacturing.
      PubDate: 2015-01-01
       
  • Erratum to: Case study on municipal solid waste management in Vavuniya
           township: practices, issues and viable management options
    • PubDate: 2015-01-01
       
  • Combination of X-ray transmission and eddy-current testing for the
           closed-loop recycling of aluminum alloys
    • Abstract: Abstract In general, aluminum alloys at industrial end-of-life are considerably recycled into aluminum alloys, but they are mostly recycled as alloys for casting because their acceptable concentration limits are not strictly designated and not comparable with those of wrought alloys. This means that recycling from end-of-life wrought alloys to cast alloys has been practiced instead of closed-loop recycling from end-of-life wrought alloys to wrought alloys. The energy required for producing aluminum from recycled aluminum is only 5 % of the energy required for producing aluminum from bauxite. In addition, refining material into wrought aluminum alloys requires many primary aluminum ingots. In terms of saving energy and resources, it would be better if we could conduct closed-loop recycling from end-of-life wrought alloys to wrought alloys. In this study, a combination of X-ray transmission and eddy-current testing is examined with the aim of sorting wrought aluminum alloys. The seven types of wrought aluminum alloys were only sorted into three groups by using X-ray transmission testing and eddy-current testing, while they were sorted into six groups by using a combination of X-ray transmission and eddy-current testing.
      PubDate: 2015-01-01
       
 
 
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