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Recovery of phosphorus and metallic nickel along with HCl production from electroless nickel plating effluents: The key role of three-compartment photoelectrocatalytic cell system
Zhang, Juanjuan; Djellabi, Ridha; Zhao, Shen; Qiao, Meng; Jiang, Feng; Yan, Mingquan; Zhao, Xu
2020-07-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume394Pages:1-8
AbstractA three-compartment photoelectrocatalytic (PEC) cell system combined with ion exchange and chemical precipitation was proposed to recover phosphorus and nickel from electroless nickel plating effluents containing hypophosphite (H2Po2-) and nickel ions (Ni2+). Ion exchange was used to concentrate and separate Ni2+ and H2PO2-. As a key unit, the established PEC system consisted of TiO2/Ni-Sb-Sno(2) photoanode and Ti cathode. With 25.8 mM NaH2PO2 and 500 mM NiCL2, 100 % H2PO2- was oxidized to PO43- in the anode cell, 78 % Ni2+ was recovered as metallic Ni in the cathode cell, and 900 mM HCl was obtained in the middle cell within 24 h at 3.0 V. Based on quenching experiments and ESR technique, (OH)-O-center dot radicals were mainly responsible for H2PO2- oxidation. In situ Raman spectroscopy indicated that Ni2+ initially reacted with OH- to form alpha-Ni(OH)(2), which was gradually reduced to metallic Ni. Fortunately, a slight pH decrease in the cathode cell in the three-compartment cell system was beneficial for Ni2+ reduction to Ni degrees. The obtained PO43- was recovered by chemical precipitation. Finally, recovery of phosphorus and metallic nickel along with HCl production from an actual electroless nickel plating effluents in terms of efficiency, cost-benefit, and stability assessment were demonstrated.
Department中国科学院饮用水科学与技术重点实验室
KeywordPhotoelectrocatalytic Hypophosphite oxidation Nickel recovery HCL production Phosphorus recovery
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45352
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Zhang, Juanjuan,Djellabi, Ridha,Zhao, Shen,et al. Recovery of phosphorus and metallic nickel along with HCl production from electroless nickel plating effluents: The key role of three-compartment photoelectrocatalytic cell system[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,394:1-8.
APA Zhang, Juanjuan.,Djellabi, Ridha.,Zhao, Shen.,Qiao, Meng.,Jiang, Feng.,...&Zhao, Xu.(2020).Recovery of phosphorus and metallic nickel along with HCl production from electroless nickel plating effluents: The key role of three-compartment photoelectrocatalytic cell system.JOURNAL OF HAZARDOUS MATERIALS,394,1-8.
MLA Zhang, Juanjuan,et al."Recovery of phosphorus and metallic nickel along with HCl production from electroless nickel plating effluents: The key role of three-compartment photoelectrocatalytic cell system".JOURNAL OF HAZARDOUS MATERIALS 394(2020):1-8.
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