期刊
WATER RESEARCH
卷 46, 期 4, 页码 1185-1197出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2011.12.023
关键词
Brewery wastewater treatment; Carbon nanotubes; Heterogeneous coagulation and flocculation; Turbidity; Chemical oxygen demand; Zeta potential
资金
- University of the Witwatersrand
Coagulation and flocculation treatment processes play a central role in the way wastewater effluents are managed. Their primary function is particle removal that can impart colour to a water source, create turbidity, and/or retain bacterial and viral organisms. This study was carried out to investigate whether carbon nanotubes (CNTs) can be used as heterogeneous coagulants and/or flocculants in the pretreatment of brewery wastewater. A series of experiments were conducted in which the efficiencies of pristine and functionalised CNTs were compared with the efficiency of traditional ferric chloride in a coagulation/flocculation process. Turbidity and chemical oxygen demand (COD), including the zeta potential were used to monitor the progress of the coagulation/flocculation process. Both pristine and functionalised CNTs demonstrated the ability to successfully coagulate colloidal particles in the brewery wastewater. Overall, ferric chloride was found to be a more effective coagulant than both the pristine and functionalised CNTs. (C) 2011 Elsevier Ltd. All rights reserved.
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