Optimization of metal bio-acid leaching from mobile phone printed circuit boards using natural organic acids and H2O2

Journal of Material Cycles and Waste Management - With increased popularity and technological innovation, more and more electric and electronic equipment wastes (e-wastes) are being generated....     

The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

Journal of Material Cycles and Waste Management - In this study, the effect of micro-SiO2 (S) and micro-Al2O3 (A) additives on the strength of geopolymer pastes was investigated. Micro...     

Utilization of CO2 into recycled construction materials: A systematic literature review

Journal of Material Cycles and Waste Management - In recent years, as the concepts of “zero waste” and “low carbon” gradually become hot topics, the unparalleled generation...     

CO2 emission assessment of lightweight aggregate concrete using artificial lightweight and bottom ash particles

Journal of Material Cycles and Waste Management - This paper proposes empirical models to straightforwardly assess the CO2 emissions of artificial lightweight aggregate concrete (ALWC) and bottom...     

Towards zero waste in emerging countries - a South African experience

The aim of this paper is to describe the optimisation of Waste Minimisation/Zero Waste strategies into an already established integrated waste management system and to present a Zero Waste model for post-consumer waste for urban communities in South Africa. The research was undertaken towards the fulfilment of the goals of the Polokwane Declaration on Waste Management [DEAT, 2001. Department of Environmental Affairs and Tourism, Government of South Africa. Polokwane Declaration. Drafted by Government, Civil Society and the Business Community. National Waste Summit, Polokwane, 26-28 September 2001], which has set as its target the reduction of waste generation and disposal by 50% and 25%, respectively, by 2012 and the development of a plan for Zero Waste by 2022. Two communities, adjacent to the Mariannhill Landfill site in Durban, were selected as a case study for a comparative analysis of formal and informal settlements. Since the waste generated from these two communities is disposed of at the Mariannhill landfill, the impact of Zero Waste on landfill volumes could be readily assessed. A Zero Waste scheme, based on costs and landfill airspace savings, was proposed for the area. The case study demonstrates that waste minimisation schemes can be introduced into urban areas, in emerging countries, with differing levels of service and that Zero Waste models are appropriate to urban areas in South Africa.     

Characterization of Cu2+ adsorption for eco-hydroxyapatite derived from limestone sludge via hydrothermal synthesis

Journal of Material Cycles and Waste Management - This study developed a novel approach to the hydrothermal synthesis of eco-hydroxyapatite (eco-HPA) from recycled limestone sludge for the removal...     

Adsorption of Pb2+ by insolubilized humic acid extracted from sewage sludge

Journal of Material Cycles and Waste Management - This study used excess sludge from a sewage treatment plant as raw material to extract humic acid (HA) and explore the ability of HA to adsorb Pb2+...     

Recovery of Pd as PdO from Pd/SiO2 catalyst by leaching using hydrochloric acid

Journal of Material Cycles and Waste Management - The recovery of Pd from spent catalysts has been gaining attention due to its high economic value and limited availability in nature. To recover...     

Study on mechanical properties and microstructure of recycled fine aggregate concrete modified by Nano-SiO2

Journal of Material Cycles and Waste Management - In this study, the effects of different contents of Nano-SiO2 (NS) on a slump, compressive strength, splitting tensile strength, flexural strength,...     

Stepwise reduction kinetics of iron-based oxygen carriers by CO/CO2 mixture gases for chemical looping hydrogen generation

Journal of Material Cycles and Waste Management - Chemical looping hydrogen generation using iron oxides as oxygen carriers is a novel technology to convert carbonaceous substances into hydrogen....     

Hydro-thermal reaction according to the CaO/SiO2 mole-ratio in silico-manganese slag

Journal of Material Cycles and Waste Management - SiMn slag is a by-product of the production of ferroalloy, and has a chemical composition that could be used as a cement admixture. It is not...     

Effects of a composition change of ordinary Portland cement on waste utilization and CO2 emissions in Japan

Journal of Material Cycles and Waste Management - This paper estimates the effects of a composition change of ordinary Portland cement on waste utilization and CO2 emissions in the Japanese cement...     

Cobalt extraction from spent lithium-ion battery cathode material using a sulfuric acid solution containing SO2

Journal of Material Cycles and Waste Management - To increase the degree of cobalt (Co) extraction, the process of the cathode material leaching was performed in a sulfuric acid (H2SO4) solution...     

Sensor-based sorting of waste digital devices by CNN-based image recognition using composite images created from mass and 2D/3D appearances

Journal of Material Cycles and Waste Management - To improve the recycling process of waste from electrical products, we developed a sensor-based sorting system using convolutional neural network...     

High CO2 adsorption on improved ZSM-5 zeolite porous structure modified with ethylenediamine and desorption characteristics with microwave

Journal of Material Cycles and Waste Management - Synthesized zeolite Socony Mobil-5 (ZSM-5) with large pore surface structures and modified with ethylenediamine were used to achieve high CO2...     

Comparison of energy recovery system from municipal solid waste in terms of energy balance and life cycle CO2 emission

Journal of Material Cycles and Waste Management - We evaluated four systems for recovering energy from municipal solid waste in terms of life cycle energy and CO2 emissions. Two of these were a...     

Characterization of coal gangue and coal gangue-based sodalite and their adsorption properties for Cd2+ ion and methylene blue from aqueous solution

Journal of Material Cycles and Waste Management - Synthesis and development of high-efficiency and low-cost adsorbents for treating of the wastewater containing heavy metal ions and/or dyes has...     

Recycling of Tannery (chrome) sludge into sludge biochar (SB) /TiO2 nanocomposite via chemical activation through hydrothermal pre-treatment

Journal of Material Cycles and Waste Management - The preparation of biochar from Tannery (chrome) sludge has gained recent attention among many scientists globally. Hydrothermal pre-treatment...     

Hydrogen-rich gas production from sorption-enhanced sludge gasification using CaO-based biochar derived from crab shell as a CO2 sorbent

Journal of Material Cycles and Waste Management - A CaO-based biochar (CSC) prepared from waste crab shell was used as a low-cost CO2 sorbent to enhance sludge steam gasification for H2-rich gas...     

Study to improve the reactivity of magnesium cations to CO2 for carbon capture and utilization technology using edible salt manufacturing plant wastewater

Journal of Material Cycles and Waste Management - This study aims to improve the formation of MgCO3 via inorganic carbon capture utilization (CCU) technology using industrial wastewater from an...