Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India.
J Environ Manage. 2013 Oct 15;128:949-63. doi: 10.1016/j.jenvman.2013.06.043. Epub 2013 Jul 25.
Various techniques such as physical, chemical, biological, advanced oxidation and electrochemical are used for the treatment of industrial effluent. The commonly used conventional biological treatment processes are time consuming, need large operational area and are not effective for effluent containing toxic elements. Advanced oxidation techniques result in high treatment cost and are generally used to obtain high purity grade water. The chemical coagulation technique is slow and generates large amount of sludge. Electrocoagulation has recently attracted attention as a potential technique for treating industrial effluent due to its versatility and environmental compatibility. This technique uses direct current source between metal electrodes immersed in the effluent, which causes the dissolution of electrode plates into the effluent. The metal ions, at an appropriate pH, can form wide range of coagulated species and metal hydroxides that destabilize and aggregate particles or precipitate and adsorb the dissolved contaminants. Therefore, the objective of the present manuscript is to review the potential of electrocoagulation for the treatment of industrial effluents, mainly removal of dyes from textile effluent.
各种技术，如物理、化学、生物、高级氧化和电化学，都被用于处理工业废水。常用的传统生物处理工艺耗时较长，需要较大的操作面积，并且对于含有有毒元素的废水效果不佳。高级氧化技术导致处理成本高，通常用于获得高纯度等级的水。化学混凝技术速度慢，会产生大量污泥。电絮凝最近作为一种处理工业废水的潜在技术引起了人们的关注，因为它具有多功能性和环境兼容性。该技术在浸入废水中的金属电极之间使用直流电源，这会导致电极板溶解到废水中。在适当的 pH 值下，金属离子可以形成广泛的凝聚物种和金属氢氧化物，使颗粒不稳定并聚集或沉淀并吸附溶解的污染物。因此，本手稿的目的是综述电絮凝处理工业废水的潜力，主要是去除纺织废水中的染料。
