naa a22 4500 51082160X CHVBK 20180411083535.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s11814-013-0159-8 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0159-8 Treating electrolytic manganese residue with alkaline additives for stabilizing manganese and removing ammonia [Elektronische Daten] [Changbo Zhou, Jiwei Wang, Nanfang Wang] Electrolytic manganese residue (EMR) from the electrolytic manganese industry is a solid waste containing mainly calcium sulfate dihydrate and quartzite. It is impossible to directly use the EMR as a building material due to some contaminants such as soluble manganese, ammonia nitrogen and other toxic substances. To immobilize the contaminants and reduce their release into the environment, treating EMR using alkaline additives for stabilizing manganese and removing ammonia was investigated. The physical and chemical characteristics of the original EMR were characterized by XRFS, XRD, and SEM. Leaching test of the original EMR shows that the risks to the environment are the high content of soluble manganese and ammonia nitrogen. The influence of various alkaline additives, solidifying reaction time, and other solidifying reaction conditions such as outdoor ventilation and sunlight, and rain flow on the efficiencies of Mn2+ solidification and ammonia nitrogen removal was investigated. The results show that with mass ratio of CaO to residue 1: 8, when the solidifying reaction was carried out indoors for 4 h with no rain flow, the highest efficiencies of Mn2+ solidification and ammonia nitrogen removal (99.98% and 99.21%) are obtained. Leaching test shows that the concentration and emission of manganese and ammonia nitrogen of the treated EMR meets the requirements of the Chinese government legislation (GB8978-1996). Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Electrolysis Manganese Residue nationallicence Harmless Disposal nationallicence Solidification of Manganese nationallicence Removal of Ammonia Nitrogen nationallicence Zhou Changbo Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road, 100012, Beijing, China aut Wang Jiwei Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road, 100012, Beijing, China aut Wang Nanfang School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, 88 Fuxing East Road, 411104, Xiangtan, China aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/11(2013-11-01), 2037-2042 0256-1115 30:11<2037 2013 30 11814 https://doi.org/10.1007/s11814-013-0159-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0159-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Changbo Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road, 100012, Beijing, China aut NATIONALLICENCE 700 1- Wang Jiwei Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road, 100012, Beijing, China aut NATIONALLICENCE 700 1- Wang Nanfang School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, 88 Fuxing East Road, 411104, Xiangtan, China aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/11(2013-11-01), 2037-2042 0256-1115 30:11<2037 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer