矿井水井下原位处理的PRB活性材料组合修复能力研究

Repairability of PRB active material combination on in-situ mine water

针对矿井水地面处理的成本高和占地面积大等问题,提出矿井水井下处理与PRB修复相结合的原位处理方法,通过构建1号(无烟煤和钢渣)、2号(无烟煤和石英砂)、3号(无烟煤和沸石)、4号(无烟煤和钢渣、石英砂、沸石)PRB活性材料柱的动态实验,处理含有COD,NH4-N,PO4-P,Mn2+,SS污染物的矿井水,研究PRB井下原位处理方法的可行性和有效性。实验结果表明:1～4号柱由于不同的组合材料而对COD,NH4-N,PO4-P,Mn2+,SS有不同的最好去除率,其中4号柱对COD,NH4-N,PO4-P,Mn2+,SS的平均去除率分别为59.9%,68.7%,77.9%,80.06%,88.8%,去除效果和渗透性相对较好。综合各项指标,4号柱中无烟煤、钢渣、石英砂、沸石(体积比3∶1∶1∶1)为最佳组合,适于含有机物、氮、磷和重金属离子污染矿井水的井下原位处理。

To overcome the problem of high cost and large footprint in treating polluted mine water on surface, a meth- combining in-situ mine water treatment and PRB repair was proposed in this paper. With PRB active materials, Col- umn 1 （anthracite coal and steel slag）, Column 2 （anthracite coal and quartz sand）, Column 3 （anthracite and zeolite） and Column 4（ anthracite coal, steel slag, quartz sand and zeolite） were constructed to treat mine water containing COD, NH4-N, PO4-P, Mn2＋ and SS. The experimental results show that the Column 1 - 4 has different optimal remov- al rates to COD, NH4 -N, PO4-P, Mn2＋ and SS, due to different combination of materials. In Column 4, the average re- moval rates of COD, NH4-N, PO4-P, Mn2＋ and SS are 59.9% ,68.7% ,77.9%, 80. 06% and 88.8% respectively, and also both its removal rates and permeability are high comparing with other columns. As a result, Column 4 is an optimal combination with anthracite coal, steel slag, quartz sand and zeolite （ the volume ratio is 3 ： 1 ： 1 ： 1 ） ,which is suitable for repairing and controlling polluted mine water with organics, nitrogen, phosphor and heavy metal ion under- ground.