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Application of response surface methodology for the treatment of acid mine drainage from closed coal mines by nanofiltration:A case study of Wuma river watershed in Renhuai City, Guizhou Province

Authors： Zhao Shuhan, Jin Xiuqi, Deng Qiang, Zhang Wenxing,Huang Yuanling,Zhang Anfeng

Units： 1. Guizhou Institute of Environmental Sciences Research and Design，Guiyang 550081,China;2.Guizhou Central Laboratory of Geology and Mineral Resources, Guizhou Engineering Research Center for Comprehensive Utilization of Precious Metals Mineral Resources, Guiyang 550018,China

KeyWords： Acid mine drainage; Iron; Manganese; Nanofiltration; Response surface methodology; Wuma river.

ClassificationCode：TQ028；X522

year,volume(issue):pagination： 2023,43(5):127-135

Abstract：

This study conducts experimental research on treating acid mine drainage (AMD) using nanofiltration membrane, taking the AMD from closed coal mines in the Wuma river watershed of Renhuai City, Guizhou Province as an example. Response surface methodology(RSM) was employed to establish a model for the treatment of AMD based on a single-factor experiment. The results indicate that the model of permeate flows was significant under the conditions of 20 ℃, 2.5 times concentration and a single cycle experiment. Furthermore, trans-membrane pressure drop (TMP) was found to have a significant impact on permeate flows, while the iron and manganese concentration was found to be insignificant. The fitting degree of other RSM models was not significant, and there was no significant difference in iron retention rates, manganese retention rates and acid recovery rates under different response factors. The iron and manganese retention rates ranged from 92.10 to 100% and 79.01% to 98.81% ,respectively, while acid recovery rates ranged from 95.2 to 23.6%. These results suggest that the nanofiltration is efficient and stable during AMD treatment.

Funds：

贵州省科技计划项目《膜耦合卡林型金矿预氧化废水资源化利用关键技术研究及示范》（黔科合支撑[20122]一般225）；贵州省地质矿产勘查开发局地质科研项目《煤矿酸性废水有害组分迁移转化规律及其无害化方法研究——以仁怀市午马河流域为例》（黔地矿科合[2019]27号）

AuthorIntro：

赵书晗（1991-），女，吉林省白城人，硕士研究生，工程师，研究方向：水污染防治，E-mail：2110767821@qq.com.

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