Adsorption and Chemisorption for Wastewater Treatment

Adsorption is a process whereby substances accumulate on the surfaces of a solid body due to the van de. This process is a physical one – when the same thing happens as a result of a chemical bond, the process is known as chemisorption. In wastewater treatment, activated carbons are often used to bind to soluble elements in the water which were unable to be removed in earlier stages of the treatment process such as mechanical or biological. Colorants from textile dying, pharmaceutical residues, arsenic, and heavy metals are examples of substances that can be effectively removed through this process.

The chemical process of precipitation involves the addition of suitable agents to the wastewater which can transform dissolved substances to ones that are not easily soluble. With this transformation, the material precipitates and lowers the concentration of the material. Heavy metals can precipitate as metal hydroxides, and anions can precipitate as calcium, iron, or aluminum salts, for example.Flocculation uses flocculants to help remove very fine particles from wastewater that would not normally accumulate as larger agglomerates as a result of their electrical repulsion from having an identical charge. By adding specialty chemicals, larger formulations of particles will occur which will then settle out in a sedimentation process.

This chemical wastewater treatment process works in a similar fashion as chemical oxidation. Sludge is treated with a large amount of a given oxidant, such as chlorine. The introduction of the oxidant slows down the rate of biological growth within the sludge and also helps deodorize the mixture. The water is then removed from the sludge. Hydrogen peroxide can also be used as an oxidant and may be a more cost-effective choice. Processing of wastewater for use, or recycling and reuse, represents a unification of several distinct technologies, including specialized chemicals, mechanical filtration products, purification systems, specially designed equipment, and wastewater treatment services to obtain satisfactory solutions to the challenges of water purification and remediation.This article provided a review of wastewater treatment processes with an emphasis on the chemical wastewater treatment process. If you want to look for reliable activated carbon manufacturer, Please click here：https://www.yrdcarbon.com/