Removal of Heavy Metals from Industrial Effluents by Chemical Precipitation and Chemical Coagulation

Authored by: Nazih K. Shammas , Lawrence K. Wang , Mu-Hao Sung Wang

Handbook of Advanced Industrial and Hazardous Wastes Management

Print publication date:  October  2017
Online publication date:  October  2017

Print ISBN: 9781466513419
eBook ISBN: 9781315117423
Adobe ISBN:

10.1201/9781315117423-35

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Abstract

Chemical precipitation is a chemical reaction or process in which soluble ions (such as soluble heavy metal ions or soluble phosphate ions) are converted to insoluble solids by a soluble chemical precipitating agent in a process reactor containing aqueous solution. The resulting insoluble solids that are formed in the chemical precipitation process reactor are called precipitates. In other words, in a pure chemical precipitation process, a “soluble precipitating agent” chemically reacts with one or more “soluble ionic pollutants,” forming “insoluble precipitates.” The aqueous solution in the reactor is the water or wastewater to be treated for removal of ionic pollutants.

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