期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 364, 期 -, 页码 562-570出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.10.068
关键词
In-Situ ion exchange electrocatalysis; Cation-exchange resins; Simultaneously removing refractory organics and heavy metals; Electroplating wastewater; Current density (CD)
资金
- National Natural Science Foundation of China [NSFC51508227, NSFC51278225, NSFC51678276]
- key research and development plan of Shandong Province [2017GSF217011]
- Natural Science Foundation of Shandong Provincial, China [ZR2017MEE048]
- Shandong Province Higher Educational Science and Technology, China [J14LG02]
- Shandong Province Science and Technology Development Plan-Policy Guidance Project [2013YD17003]
- Jinan University Teachers' Study Abroad Program
- PhD Foundation of the University of Jinan [XBS1814]
The goal of this research was to develop a new process for simultaneously removing organics and heavy metals of electroplating wastewater by in-situ ion exchange electrocatalysis biological coupling (i-IEEBC). The study evaluated the removal efficiency of coexisting refractory organics and heavy metal ions, and investigated the effects of current density (CD) on the removal performance of the i-IEEBC method. The results indicated the i-IEEBC reactor exhibited higher average removal rates of COD, TOC, Cr and Cu ions, i.e. 87.23%, 80.42%, 91.25%, and 95.97% in that order, which represented an increase by 32.59%, 40.10%, 31.86%, and 33.82%, respectively, compared with BAF. The optimum CD for simultaneously removing organics and heavy metals of electroplating wastewater in i-IEEBC was 0.40 mA/(cm)(2). The change of biodegradability and the presence of short chain organic compounds also indirectly confirmed the excellent removal organic pollutants performance of i-IEEBC at the optimum CD. In addition, the composition and construction of CER before and after the application, under the optimum CD, SEM, EDS and FT-IR spectroscopy also showed that the cation exchange properties of CER improved the catalytic lifetime of the particle electrodes. This research provides a highly efficient new alternative to electroplating wastewater treatment technology.
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