期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 171, 期 -, 页码 523-529出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.01.025
关键词
Electrolytic manganese residue; Electrokinetic remediation; Pulsed electric field; Manganese; Ammonia nitrogen
资金
- National Natural Science Foundation of China [21806132]
- National Key Research and Development Program of China [2018YFC1903503, 2018YFC1903506]
- 'Sichuan Province Science and Technology plan-Key Research and Development' [19ZDYFO911]
- Doctoral Research Fund Project of Southwest University of Science and Technology [17zx7142]
- Special Project of Science and Technology Innovation in Social Programs and People's Livelihood Guarantee of Chong ging [cstc2017shinsA90016]
- Southwest University of Science and Technology [14zxgk01, 17LZX422, 17LZXT05]
Electrolytic manganese residue (EMR) is a solid waste generated in the process of producing electrolytic metal manganese and contains a lot of manganese and ammonia nitrogen. In this study, electrokinetic remediation (EK) of manganese and ammonia nitrogen from EMR were carried out by using pulse electric field (PE) in different agents, and sodium dodecyl benzene sulfonate (SDBS), citric acid (CA) and ethylene diamine tetraacetic acid (EDTA) were used as enhancement agents. The removal behavior of ammonia nitrogen and manganese under direct current field (DC) and PE, and the relationship between manganese fractionation and transport behavior, as well as the energy consumption were investigated. The results demonstrated that the removal efficiency of ammonia nitrogen and manganese using PE were higher than DC. SDBS, EDTA and CA could enhance electroosmosis and electromigration, and the sequence of enhancement agent effects were CA, SDBS, EDTA, distilled water. The highest removal efficiency of manganese and ammonia nitrogen were 94.74% and 88.20%, and the effective removal amount of manganese and ammonia nitrogen was 23.93 and 1.48 mg.wh(-1), when CA and SDBS + CA was used as the enhancement agents, respectively. Moreover, electromigration was the main removal mechanism of manganese and ammonia nitrogen in the EK process.
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