Simultaneous removal of Fe(II) and Mn(II) from acid mine wastewater by electro-Fenton process
Simultaneous removal of Fe(II) and Mn(II) from acid mine wastewater by electro-Fenton process
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电芬顿法同时去除酸性矿山废水中的 Fe(II) 和 Mn(II)
DOI：
10.1016/j.psep.2020.06.026
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发表时间：
2020-11-01
影响因子：
7.8
通讯作者：
Wu, Zhibin
中科院分区：
文献类型：
--
作者：
Chai, Youzheng;Qin, Pufeng;Wu, Zhibin
含铁（II）、锰（II）酸性矿山废水的处理一直是人们关注的热点问题。对电fenton法处理矿山酸性废水进行了研究。首先，研究了初始电流强度（50 ~ 300 mA）、极板间距（0.5 ~ 3.0 cm）、初始pH（3.0 ~ 5.0）、曝气速率（0 ~ 200 mL/min）等关键参数的影响。在此基础上，对电fenton工艺在实际废水中的性能及电fenton系统的稳定性进行了研究。分析了其去除机理和相互促进作用。在电流强度200 mA、初始pH 4.0、板间距1.5 cm、曝气速率100 mL/min的最佳条件下，对废水中Fe（II）和Mn（II）的去除率分别可达99.2%和90.5%。电fenton工艺在实际废水处理中发挥了重要作用，对Fe（II）和Mn（II）的去除率分别达到96.5%和87.5%，且工艺稳定性好。通过Box-Behnken设计和响应面法（RSM）对最佳条件进行了优化。在电流强度210 mA、板间距1.6 cm、初始pH 4.0、曝气速率110.4 mL/min的优化条件下，Fe（II）和Mn（II）的去除率分别达到99.6%和92.9%。并对电fenton法处理酸性矿山废水的经济效益进行了评价。结果表明，电fenton工艺的成本仅为0.56美元/m(3)。(C) 2020化学工程师学会。Elsevier B.V.版权所有。
The treatment of acid mine wastewater containing Fe(II) and Mn(II) has been a hot topic in a long time. This paper studied the treatment of acid mine wastewater by the electro-Fenton process. First, the effect of key parameters including initial current intensity (50-300 mA), plate spacing (0.5-3.0 cm), and initial pH (3.0-5.0), aeration rate (0-200 mL/min) were studied. Based on these results, the performance of electroFenton process in actual wastewater and the stability of electro-Fenton system were investigated. Then the removal mechanism and mutual promotion effect were analyzed. The removal efficiency of Fe(II) and Mn(II) in wastewater could reach 99.2 % and 90.5 %, respectively, under the optimal conditions (current intensity 200 mA, initial pH 4.0, plate spacing 1.5 cm, aeration rate 100 mL/min). Electro-Fenton process has an important effect in actual wastewater treatment (removal efficiency of Fe(II) and Mn(II) reached 96.5 %, and 87.5 %, respectively), while the stability of this process was good. The optimal conditions were optimized through Box-Behnken design and response surface method (RSM). Removal efficiency of Fe(II) and Mn(II) could reach 99.6 % and 92.9 %, respectively, under optimized conditions (current intensity 210 mA, plate spacing 1.6 cm, initial pH 4.0, aeration rate 110.4 mL/min). In addition, the economic advantage of electro-Fenton process in acid mine wastewater treatment were evaluated. The result indicated that the cost of electro-Fenton process was only 0.56 $/m(3). (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.