组合沉淀工艺处理酸性矿山废水的实验研究

发布时间：2018-03-06 15:30

本文选题：酸性矿山废水　切入点：组合沉淀工艺　出处：《环境工程》2016年S1期 　论文类型：期刊论文

【摘要】：为研究中和-沉淀-混凝工艺中不同沉淀剂对酸性矿山废水处理效果的影响,以广东省大宝山矿槽对坑尾矿库废水为例,采用3种常用的沉淀剂(硫化钠、碳酸钠及DTCR)构成3种组合沉淀工艺(分别为L-SS-F,L-SC-F与LDTCR-F)进行了对比研究。结果表明:在L-SS-F与L-SC-F工艺中,硫化钠与碳酸钠的投加量分别达到100,200 mg/L,废水中除Mn以外的其他重金属去除率高达94%~100%;在L-DTCR-F工艺中,DTCR投加量达到40mg/L,废水中所有重金属的去除率均在94%以上。3种组合沉淀工艺的药剂费之比为L-SS-F∶L-SC-F∶L-DTCR-F=1∶1.3∶1.5。建议对于ρ(Mn)25 mg/L的酸性矿山废水,可采用硫化钠作为沉淀剂;对于更高Mn含量的酸性矿山废水,可采用DTCR沉淀技术。
[Abstract]:In order to study the effect of different precipitators on the treatment of acid mine wastewater in neutralization-precipitation-coagulation process, taking Dabaoshan mine trough in Guangdong Province as an example, three common precipitators (sodium sulphide) were used. Three combined precipitation processes (L-SS-FU L-SC-F and LDTCR-F) composed of sodium carbonate and DTCR-F were compared. The results showed that: in L-SS-F and L-SC-F processes, The dosage of sodium sulphide and sodium carbonate reached 100,200 mg / L, respectively, and the removal rate of other heavy metals in wastewater, other than mn, was as high as 940.In L-DTCR-F process, the dosage of sodium sulphide and sodium carbonate reached 40 mg / L, and the removal rate of all heavy metals in wastewater was above 94%. 3 kinds of combination sedimentation. The ratio of reagents cost for the process is L-SS-FW L-SC-F1: L-DTCR-FU 1: 1.3: 1.5. It is suggested that the acidic mine wastewater from 蟻 MNO _ (25) mg/L should be treated. Sodium sulphide can be used as precipitating agent, and DTCR precipitation technology can be used for acidic mine wastewater with higher mn content.
【作者单位】：中国科学院广州地球化学研究所有机地球化学国家重点实验室;仲恺农业工程学院;中国科学院大学;
【基金】：广东省自然科学基金杰出青年基金项目(S2013050014122) 广东省环境资源利用与保护重点实验室开放运行项目(2014B030301060)
【分类号】：X751

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