Details

Autor(en) / Beteiligte

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

Titel

Combined Reduction/Precipitation, Chemical Oxidation, and Biological Aerated Filter Processes for Treatment of Electroplating Wastewater

Ist Teil von

• Separation science and technology, 2015-10, Vol.50 (15), p.2303-2310

Ort / Verlag

Taylor & Francis

Erscheinungsjahr

2015

Quelle

Taylor & Francis

Beschreibungen/Notizen

• 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 Fe 2+ reduction (for Cr 6+ ) and subsequent precipitation (for Cr 3+ , Cu 2+ , and Ni 2+ ions), and cyanide was efficiently removed by the formation of insoluble complex compounds with Fe 2+ ions. During the following chemical oxidation process, the residual cyanide was mainly transformed to low-toxic cyanate, and Cu 2+ and Ni 2+ ions were released due to degradation of organic compounds and then removed by precipitation.