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Start Over Author "Aihong He" Journal separation science and technology
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1. Combined reduction/precipitation, chemical oxidation and biological aerated filter processes for treatment of electroplating wastewater

Author

Huijing Shi, Bin Feng, Wei Li, Jijun Li, Jun Zhao, Dewei Shi, Aihong He, Huichun Shi, and Yongping Bai

Subjects
inorganic chemicals, Precipitation (chemistry), Process Chemistry and Technology, General Chemical Engineering, Cyanide, Metal ions in aqueous solution, Inorganic chemistry, Filtration and Separation, General Chemistry, Cyanate, Filter (aquarium), Metal, chemistry.chemical_compound, chemistry, visual_art, visual_art.visual_art_medium, Degradation (geology), Aeration
Abstract

In this work, a combination process was developed in lab-scale for the purpose of removing pollutants in electroplating wastewater with high cyanide and metal loadings. Most of heavy metal ions were removed by Fe2+ reduction (for Cr6+) and subsequent precipitation (for Cr3+, Cu2+, and Ni2+ ions), and cyanide was efficiently removed by the formation of insoluble complex compounds with Fe2+ ions. During the following chemical oxidation process, the residual cyanide was mainly transformed to low-toxic cyanate, and Cu2+ and Ni2+ ions were released due to degradation of organic compounds and then removed by precipitation.

Published
2015

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