The Pros And Methods Of Incineration

One of the most usually used methods for disposing E-waste is to bury it. Mining voids or borrow depths can be used in land filling. E-wastes ending up as landfills may release pollutants to the environment after some years by natural ways. Leaching some wastes such as batteries may possibly release acids and heavy metals like: mercury, nickel, and cadmium. Moreover, E-wastes landfills may pollute groundwater (Schmidt, 2002; Yang, 1993). Diffusing to the land, polluted water will mix with other water sources such as rivers and streams hence reaching animals and humans (Kasassi et al., 2008). Organic and decayed materials in landfills decompose and penetrate through the soil as landfill leachate containing high concentrations of polluting substances

It usually acts as an alternative to other disposal methods, especially landfilling. Incineration can lessen the volume of waste and the energy content of its combustible materials. When burning the waste materials, a reduction in its volume occurs and the its materials energy content can be utilized. Incineration also includes pyrolysis; (heating the substance in no oxygen) where the substances are converted to fumes, oils, and charcoal. When heating the plastic or PVC circuit board fume consists of carcinogens polycyclic aromatics, dioxins, and polychlorinated dibenzofurans and gases such as oxides of carbon, sulfur and nitrogen are freed. Smoke, also consists of minor quantities of oxides of heavy metal residues such as antimony, lead, thallium, arsenic, copper, manganese, mercury and nickel, remainder ended up in the ashes. E-waste incineration plants promote significantly the yearly emissions of cadmium and mercury (Stewart and Lemieux, 2003; Funcke and Hemminghaus,

In this manner, factors that affect metals extraction are financially useful, recovery effectiveness and environmental impact. WPCBs recycling process for the highest recovery of metals generally includes three stages: pretreatment, size reduction and metallurgical treatment. Pretreatment means composition analysis and selective disassembly of the reusable and toxic electronic parts by thermal or chemical de-soldering (Jianzhi et al., 2004). The materials are then shredded, crushed, and screened to reduce their size (Cui and Forssberg, 2003; Veit et al., 2005; Cui and Zhang, 2008; Guo et al., 2009; Tilmatine et al., 2009; Kasper et al., 2011; Tan et al., 2011; Tuncuk et al., 2012). Metallurgical treatment involves thermal treatment, leaching, electrolysis and biohydro processes for recovery and purification of the metals (Dorella and Mansur, 2007; Pranolo et al., 2010; Provazi et al., 2011; Lister et al.,