Effect of Chloride Ions on Electro-Coagulation to Treat Industrial Wastewater Containing Cu and Ni

Chien-Hung Huang, Shan-Yi Shen, Chiu-Wen Chen, Cheng-Di Dong, Mohanraj Kumar, Balasubramanian Dakshinamoorthy and Jih-Hsing Chang
Additional contact information
Chien-Hung Huang: Department of Health Wellness and Marketing, Kainan University, Taoyuan 33857, Taiwan
Shan-Yi Shen: Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 41349, Taiwan
Chiu-Wen Chen: Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
Cheng-Di Dong: Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
Mohanraj Kumar: Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 41349, Taiwan
Balasubramanian Dakshinamoorthy: Raman Research Laboratory, PG & Research Department of Physics, Government Arts College, Tiruvannamalai 606603, Tamilnadu, India
Jih-Hsing Chang: Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 41349, Taiwan

Sustainability, 2020, vol. 12, issue 18, 1-11

Abstract: A series of experiments with different NaCl concentrations added to the PCB (printed circuit board) wastewater were prepared to investigate the chloride effect on the formation of aluminum floc and removal efficiency of Cu and Ni. The effects of pH, current density, and different concentration of NaCl were studied and the results are discussed. Results imply that chloride ions are favored to avoid the passivation of the aluminum anode in the EC (electro-coagulation) system. Chloride ions used as the electrolyte can facilitate the release of Al 3+ , which results in the current efficiency of over 100% in the EC system. For the PCB factory’s wastewater, the EC system could remove Cu 2+ and Ni 2+ effectively (both Cu and Ni concentration of treated wastewater was less than 1.0 mg/L within three minutes). PCB wastewater’s pH value could maintain stably about 9.0 in the EC system when the initial pH value was around 2.5. The estimated electricity consumption for treating PCB wastewater by the EC process was about 0.894 kWh for each meter of cubic wastewater.

Keywords: copper; current efficiency; electro-coagulation; nickel; wastewater (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/2071-1050/12/18/7693/pdf (application/pdf)
https://www.mdpi.com/2071-1050/12/18/7693/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2020:i:18:p:7693-:d:414994

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().