Magnetically attracted iron scrap anode based electrocoagulation for phosphate removal

Author:

Zhu Dandan12,Hong Xiaoting1ORCID,Hui K. S.3

Affiliation:

1. Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China

2. Xiangshan Branch of Ningbo Environmental Protection Bureau, Ningbo 315700, China

3. School of Mathematics, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, United Kingdom

Abstract

Abstract This study shows the effectiveness of a novel electrocoagulation process using magnetically attracted iron scrap anodes for phosphate removal from aqueous solution. The effect of contact time, reaction temperature, dose of iron scrap, initial phosphate concentration, applied voltage, pH, magnetic force, and the species of competing anions on the efficiency of phosphate removal and the reaction products has been investigated. The techniques of XRD, XPS, and VSM were used to characterize the elemental composition and the types of the reaction products in order to clarify the interaction between novel anode and phosphate ions. The removal of phosphate was fitted by a pseudo first-order reaction kinetic model. The results showed that magnetically attracted iron scrap anodes were electrodissoluted under an applied potential and reacted with phosphate into Fe-hydroxo-phosphate complexes. The work suggested that electrocoagulation using magnetically attracted iron scrap anodes had the potential to become a promising technique for phosphate precipitation.

Funder

Natural Science Foundation of Zhejiang Province

Open Foundation of State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control

Fundamental Research Funds of Zhejiang Sci-Tech University

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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