Removal of bentonite causing turbidity by electro‐coagulation
作者:
NabilS. Abuzaid,
AlaadinA. Bukhari,
ZakariyaM. Al‐Hamouz,
期刊:
Journal of Environmental Science and Health, Part A
(Taylor Available online 1998)
卷期:
Volume 33,
issue 7
页码: 1341-1358
ISSN:1093-4529
年代: 1998
DOI:10.1080/10934529809376792
出版商: Taylor & Francis Group
关键词: Turbidity;bentonite;electrochemical treatment;stainless steel electrodes
数据来源: Taylor
摘要:
The efficiency of electro‐coagulation as a turbidity removal process has been investigated using bentonite as a turbidity source. The influence of certain operational parameters such as current input, contact time, electrolyte concentration, and initial turbidity on the coagulation efficiency were studied. The process was found to achieve excellent turbidity removals. The lowest residual turbidities were 0.5 and 0.75 NTU for the samples with initial turbidities of 112 and 52 NTU, respectively. This was obtained at a current of 0.5 A, a contact time of 5 minutes, and a calculated dissolved iron concentration of 10.8 mg/l. At a constant current of 0.5 A, a reduction in the contact time from 5 to 2 minutes in the case of turbidity level 1 (52 NTU) and from 5 to 1 minute in the case of turbidity level 2 (112 NTU) resulted in better turbidity removals. The optimal operational parameters for turbidity level 1 are a current of 0.5 A, a contact time of 2 minutes and an NaCl concentration of 2 g/l resulting in a calculated amount of iron generated of 4.3 mg/1. However, for the case of turbidity level 2, the optimal values are a current of 0.5 A, a contact time of 1 minute and an NaCl concentration of 5 g/l with a calculated iron amount generated of 2.2 mg/l.
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