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Murugesan Manikkampatty Palanisamy,Kannan Kandasamy 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.1
The quantity of electronic waste subjected to disposal annually is increasing alarmingly and is of major environmental concerndue to the existence of heavy metals and other toxic substances. In this present study, by combining leaching and adsorptionthe recovery of heavy metals from Printed circuit boards (PCBs) has been performed. The two stage aqua-regia leachingextracts Copper (Cu), Tin (Sn), Lead (Pb), and Zinc (Zn) from PCB. Bentonite Clay (Bent) and Peanut Shell Carbon (PSC)in their pristine, thermally and chemically activated forms were employed as adsorbents to remove the heavy metals fromleached solution. Effect of parameters (contact time, temperature, adsorbent dosage and size) on % adsorption was studied. Chemically activated bent (C-A Bent) has proven to be an effective among all adsorbents studies with % adsorption for Cu97%, Sn 98%, Zn 96%, and Pb 96%. Leaching and adsorption combination can become a promising methodology for handingelectronic waste.
Murugesan Manikkampatti Palanisamy,Akilamudhan Palaniyappan,Venkata Ratnam Myneni,Kannan Kandasamy,Padmapriya Veerappan 한양대학교 세라믹연구소 2022 Journal of Ceramic Processing Research Vol.23 No.1
The electronics industry is the world's largest and fastest growing industry. This consumer-centric industry's combination oftechnology advancements and quick product obsolescence creates new environmental issues. There is an urgent need toaddress the volume and toxicity of electronic waste generated. Printed circuit boards (PCBs) are a significant component ofelectronic trash, containing mostly heavy metals such as copper (Cu), tin (Sn), zinc (Zn), and lead (Pb). Metal recovery andrecycling from PCBs is an important step in pollution prevention. Researchers have devised many methods for recoveringprecious metals from PCBs, including gravity separation, magnetic separation, and electrostatic separation, as well as PCBseparation using the organic solvent technique, leaching method, bioleaching method, or a combination of these methods. Thisresearch provides a brief summary of India's present e-waste status, environmental and health risks, continuing waste disposaland recycling activities, and emphasizes the recovery of heavy metals from PCBs by systematic leaching/bioleaching.