| 二段中和法处理酸性矿山废水 |
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| 引用本文： | 郑雅杰,彭映林,李长虹.二段中和法处理酸性矿山废水[J].中南大学学报(自然科学版),2011,42(5). |
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| 作者姓名： | 郑雅杰 彭映林 李长虹 |
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| 作者单位： | 1. 中南大学冶金科学与工程学院,湖南长沙,410083;中南大学云浮研究院,广东云浮,527300
2. 中南大学云浮研究院,广东云浮,527300 |
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| 基金项目： | 广东省教育部产学研重大项目 |
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| 摘 要： | 采用石灰与氢氧化钠二段中和法处理酸性矿山废水.研究结果表明:用石灰调节废水pH至5时,Fe,Mn,Zn的去除率分别为14.14%,5.94%和13.91%;采用氢氧化钠二段中和后,当废水pH为10.20,曝气流量为50mL/min,反应时间为20 min时,废水中铁、锰、锌去除率均达到99.7%以上,其废水中TFe,Mn2+和Zn2+残留质量浓度分别为80,810,30μg/L,均低于国家污水综合排放标准(GB 8978-1996).石灰一段中和渣为石膏(CaSO4·2H2O);氢氧化钠二段中和渣为锰锌铁氧体(Fe2Mn0.5Zn0.5O4·nH2O)和四氧化三铁(F03O4);石灰与氢氧化钠二段中和法与石灰中和法相比较,二段中和渣量少,二段中和渣具有综合利用价值.
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| 关 键 词： | 酸性矿山废水 二段中和法 石膏 铁氧体 |
Treatment of acid mine drainage by two-step neutralization |
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| ZHENG Ya-jie,PENG Ying-lin,LI Chang-hong.Treatment of acid mine drainage by two-step neutralization[J].Journal of Central South University:Science and Technology,2011,42(5). |
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| Authors: | ZHENG Ya-jie PENG Ying-lin LI Chang-hong |
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| Institution: | ZHENG Ya-jie1,2,PENG Ying-lin1,LI Chang-hong2 (1.School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China,2.Yunfu Institute of Central South University,Yunfu 527300,China) |
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| Abstract: | The acid mine drainage was treated by two-step neutralization method using lime and sodium hydroxide.The results show that the removal rates of total iron(TFe),Mn and Zn are 14.14%,5.94% and 13.91%,respectively,when the pH of the wastewater is adjusted to about 5 with lime.In the second step,using sodium hydroxide as neutralizing agent,when pH is 10.20,airflow is 50 mL/min,reaction time is 20 min,the removal rates of TFe,Mn and Zn are all up to 99.7%,and the residual contents of TFe,Mn and Zn are 80,810 and... |
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| Keywords: | acid mine drainage two-step neutralization gypsum ferrite |
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