Decomplexation of Ni-EDTA by Three-Dimensional Electro-Fenton
Juan Peng,
Yameng Ma,
Xiao Huang,
Jianghua Yu,
Fengjiao Yu,
Jingsi Gao
Affiliations
Juan Peng
State Environmental Protection Engineering Center (Shenzhen) for Hazardous Waste Utilization and Disposal, Shenzhen Environmental Technology Group Co., Ltd., Shenzhen 518055, China
Yameng Ma
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Xiao Huang
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Jianghua Yu
Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Fengjiao Yu
School of Materials and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China
Jingsi Gao
School of Materials and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China
Ni-ethylenediaminetetraacetic acid (Ni-EDTA) poses serious threats to the ecological environment and human health, due to its acute toxicity and low biodegradability. The decomplexation efficiency of Ni-EDTA through the conventional Fenton process has been constrained to pH; thus, other appropriate approaches are required to destroy the stable chelate structure at a neutral pH. In this study, the effect of operating parameters such as the pH, Fe2+ concentration, particle electrode dosage, current density, and coexisting ions was studied. The results revealed that the 3D-EF system owned advantages for the removal of Ni-EDTA in the broadening of the pH application window. The Ni-EDTA removal efficiency in the 3D-EF system reached 84.89% after 120 min at a pH of 7. In addition, the presence of coexisting ions slightly affected the decomplexation efficiency of Ni-EDTA.
