PRB修复渗滤液污染地下水的实验研究

Laboratory Study on the in situ Remediation of Leachate-polluted Groundwater with PRB Technology

可渗透反应墙(PRB)原位修复地下水污染技术,具有经济、高效等特点。采用PRB技术治理渗滤液污染的地下水,反应介质的选择和介质配比是一个关键问题。因此,以渗滤液污染地下水为研究对象,分别用零价铁粉、活性炭、沸石和陶粒4种混合介质,设计了5个PRB反应器,分别为A、B、C、D和E,对PRB修复渗滤液污染地下水的可行性和有效性进行了试验研究。设计的反应器充分考虑了反应器的渗透性能。实验结果表明:混合介质反应器A、B、C、D和E对CODcr的平均去除率分别达到了79.6%、75.6%、77.0%、78.9%和79.9%;对NH4+的平均去除率分别为87.3%、82.1%、92.1%、98.8%和88.5%。验证了PRB技术处理垃圾渗滤液对处理地下水污染的可行性。

The in situ remediation of polluted groundwater in permeable reactive barrier（PRB） technology is economical and convenient. The selection of the reactive media is the key and mainly depends on the property of contaminants, In this paper, with leachate -polluted groundwater as the research subject, five PRB reactors were designed with the mixture of zero valent iron（ZVI） , active carbon, zeolite as reaction media. The feasibility and effectiveness of treating leachate - polluted groundwater by PRB were tested. The designs of the reactors took into account the relation of the permeability of the reaction media. The experimental results showed that：the average CODcr removal rates of the reactor A, B, C, D and E were up to 79.6% ,75.6% ,77.0% ,78.9% and 79.9% ;and the NH4 average removal rates were 87.3% ,82. 1% ,92. 1% ,98.8% and 88.5% , respectively. The results indicateed that PRB technology is an efficient method for the treatment of leachate - polluted groundwater.