CIESC Journal ›› 2017, Vol. 68 ›› Issue (7): 2798-2804.DOI: 10.11949/j.issn.0438-1157.20161737

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Selective separation and recovery of manganese from manganese-bearing wastewater using carbon dioxide

MEI Ying, XUE Yuhua, YE Hengpeng, DU Dongyun   

  1. Institute of Environmental Science and Engineering, School of Resources and Environmental Science, Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, Hubei, China
  • Received:2016-12-12 Revised:2017-03-29 Online:2017-07-05 Published:2017-07-05
  • Contact: 10.11949/j.issn.0438-1157.20161737
  • Supported by:

    supported by National Key Technology Research and Development Program of China (2015BAB01B03).

利用二氧化碳选择性分离回收含锰废水中的锰

梅颖, 薛余化, 叶恒朋, 杜冬云   

  1. 中南民族大学环境科学与工程研究所, 中南民族大学资源与环境学院/催化材料科学国家民委-教育部共建重点实验室, 湖北 武汉 430074
  • 通讯作者: 杜冬云
  • 基金资助:

    国家科技支撑计划课题(2015BAB01B03)。

Abstract:

This article studied the effects of different parameters including reaction time, pH, temperature, agitation speed, pH regulator type, dosage on the selective separation, and recovery of manganese from manganese-bearing wastewater using carbon dioxide. Optimum condition was determined by the highest recovery rate of manganese. The results showed that the recovery ratio of manganese was 99.79% with reaction time of 90 min, pH of 6.6, temperature of 45℃, agitation speed of 600 r·min-1, and NaOH concentration of 2 g·L-1. Mn concentration in the effluent was lower than 5 mg·L-1, which met the third level integrated wastewater discharge standard (GB 8978-1996). The precipitate was able to meet the conforming product of manganese carbonate for industrial use standard (HG/T 4203-2011).

Key words: manganese-bearing wastewater, carbon dioxide, selective separation and recovery, precipitate, manganese carbonate

摘要:

讨论了反应时间、pH、温度、搅拌速率以及pH调节剂种类和投加量对Mn回收率的影响,确定了利用二氧化碳从含锰废水中选择性分离回收锰的最佳工艺条件。结果表明:在反应时间90 min,pH 6.6,反应温度45℃,搅拌速率600 r·min-1,NaOH投加量2 g·L-1的条件下,锰的回收率为99.79%,出水锰的浓度低于5 mg·L-1,达到《污水综合排放标准》(GB 8978-1996)中总锰的三级排放要求,沉淀物符合《工业碳酸锰标准》(HG/T 4203-2011)合格品技术要求。

关键词: 含锰废水, 二氧化碳, 选择性分离回收, 沉淀, 碳酸锰

CLC Number: