Phosphate removal from aqueous solution by electrochemical coupling siderite packed column

Chemosphere. 2021 Oct;280:130805. doi: 10.1016/j.chemosphere.2021.130805. Epub 2021 May 6.ABSTRACTThe use of iron species to remove PO43- is widely used, and the fresh Fe3+ produced in situ demonstrate better effect on the removal of PO43- in many researches. Therefore, in order to develop a simpler and more efficient method for PO43- removal, we designed an easy operation by electrochemically dissolving siderite to produce fresh Fe3+ in situ for PO43- removal from wastewater. Results showed that current intensity at 20 mA, initial pH at 6, initial PO43- concentration at 1 mM and influent flow rate at 2.5 mL min-1 were the best parameters for removing PO43-, ensuring that the PO43- concentration of effluent can be kept below 1 mg L-1 through the electrochemical system. Different from other studies, a large amount of Fe2+ can be dissolved from natural minerals without adding H+ to the system and Fe3+ species are generated in situ from the oxidation of the Fe2+ without using a specific oxidizer. This electrochemical treatment method with siderite as a packed column can be used as a new method of high efficiency, simple operation and low-cost for treating eutrophic water bodies.PMID:34162095 | DOI:10.1016/j.chemosphere.2021.130805

Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Mengfei Chen Xuewei Li Qiwu Zhang Chao Wang Huimin Hu Qian Wang Chaocheng Zeng Source Type: research