Authors
Jaydeep Singh
Abstract
Now a days, heavy metals has become a major issue because these heavy metals are discharged from numerous chemical industries and mixed with water sources. They are dangerous to all alive creatures. So, it is necessary to remove or minimize the risk of taking these heavy metals through plants, human and animal. For removing the heavy metals, various methods are developed and extensively examined. The original procedures for treating industrial water for heavy metals involves procedures for decreasing the toxicity of metals i.e. chemical precipitation, membrane purification, adsorption, ion exchange, coagulation-flocculation and floatation. In this review paper, discuss about the methodologies by eliminating toxic metals on or after water waste including, chemical precipitation, membrane filtration, ion exchange, coagulation-flocculation and electrodialysis with their advantages and limitations because of its inexpensiveness, accessibility and eco-friendly nature. Keywords: Electrodialysis, Flocculation, Adsorption, Heavy Metals
Introduction
Heavy metals are refer to as metal components that have high atomic weight and high density. Developed industries like fertilizer industry, metal processing, pulp-paper industry, mining activities, rubber-plastic industry, batteries etc. which is discharge heavy metals contaminated water into nearby water bodies. At low concentration, heavy metals are highly toxic and are carcinogenic but not biodegradable. By these heavy metals, cause serious threat to human life and to aquatic, vegetation cover. These heavy metals are absorbed and stored in human body that produce serious health disease such as cancer, damaging of nervous system, organ damage even death. The density of Heavy metals exceeds 5g per cubic centimeter. These toxic heavy metals can dissolved in water and well-known toxics and hazardous agents. These toxic metals are copper, Lead, Silver, Gold, Cadmium, Nickel, Mercury, Cobalt etc. In the industries of wood in which copper-arsenate wood is treated through which arsenic containing wastes are produced. In the same way, inorganic stain production produce pigments that have cadmium sulfide and chromium compounds, petroleum purifying produces catalysts adulterated with vanadium, nickel and chromium and similarly, photographic film produces that also has the high amount of silver and ferrocyanide. These generator produces a huge amount of water waste remains and mud which is considered as hazardous wastes and need extensive waste treatment. If heavy metals are present in low amounts, are highly toxic in nature. So, there is necessary for the reduction of toxic metals with the residue of water water which has been made a subject to strict legislations.
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| APA Style | Singh, J. (2019). Heavy Metals from Industrial Waste Water: Elimination Methods. Academic Journal of Environmental Sciences, 1(1), 17-22. |
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