Treatment characteristics of textile wastewater and removal of heavy metals using the electroflotation technique
- 作者：Merzouk Belkacem ; Madani Khodir ; Sekki Abdelkrim
- 关键词：Electroflotation ; Aluminum electrodes ; Turbidity ; Textile wastewater ; Heavy metals
- 刊名：Desalination
- 出版年：2008
- 期刊代码：24_00119164
- 类别：ce
- 出版时间：15 August 2008
- 卷：228
- 期：1-3
- 页码：245-254
- 文件大小：526 K
摘要
The present work experimentally studied the clarification of wastewater using the electroflotation technique (EF) with aluminum electrodes. In the first part, we have studied the principal parameters (feed tension U, distance between electrodes D, period of treatment t, pH and conductivity κ) affecting the process using a simulated model of wastewater. The application of the optimized parameters (U = 20 V, D = 1 cm, t = 20 min) on an industrial wastewater derived from an Algerian velvet manufacture showed a high removal of biological oxygen demand after 5 days (BOD5 = 93.5%), chemical oxygen demand (COD = 90.3%), turbidity (78.7%), suspended solids (SS = 93.3%) and color (>93%). In the second part, we have studied the separation of some heavy metal ions such as iron, nickel, copper, zinc, lead and cadmium. This allowed us to show that the kinetics of electroflotation is very quick <15 min), and the removal rate reaches 99%.