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The sustainable treatment of chemical polishing wastewater under low-carbon economy: Pollutants removal, resource recovery and energy generation by Cong Ding; Meng-yu Liu; Si-zhuo Wan; Zhao-yang Cai; Lin-jiang Yuan; Ru Wang; Ping Zheng is a Environmental Science article available to read on EtoBox.
What is The sustainable treatment of chemical polishing wastewater under low-carbon economy: Pollutants removal, resource recovery and energy generation about?
A two-step approach, first by iron-air fuel cell and then by adjusting pH, was developed to treat chemical polishing wastewater, aiming at resource recovery and energy generation. The removal efficiencies of main pollutants, i.e. PO4 3− and Al3+ were 77.87% and 100%, the corresponding volumetric removal rates were 1.81 and 0.36 kg/(m3·d). The approach also showed removal abilities to COD, SS, NO3 − and NH4 + with 77.87%, 100%, 22.96%, 16.67%, 100% and 61.53%, respectively. Nearly all of Al3+ was precipitated by PO4 3− in step I. Meanwhile, plenty of Fe2+ was accumulated for the following PO4 3− removal. In step II with pH being adjusted from 3.0 to 7.0, PO4 3− was supposed to be precipitated to form vivianite (Fe3(PO4)2·8H2O). By SEM-EDS, XRD, FITR and Mössbauer analysis, precipitate in step I was determined as AlPO4, while in step II it was mainly vivianite with a grade of 60%. The yield of AlPO4 and vivianite was 5.13 and 13.22 kg/t chemical polishing wastewater. Besides, electricity was generated by two-step approach. The total output energy was calculated as 0.33 kW h/t wastewater, with maximum output voltage at 0.19 V. This novel approach has potential economic advantages and
Who reads The sustainable treatment of chemical polishing wastewater under low-carbon economy: Pollutants removal, resource recovery and energy generation?
It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Cong Ding; Meng-yu Liu; Si-zhuo Wan; Zhao-yang Cai; Lin-jiang Yuan; Ru Wang; Ping Zheng
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Environmental Science (Physical Sciences)