Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Environ Technol. 2012 Sep;33(16-18):1905-12. doi: 10.1080/09593330.2011.650223.
Groundwater contaminated with petroleum hydrocarbons was treated using a combined system of adsorption onto powdered expanded perlite (PEP) followed by the O3/H2O2 process. The pretreatment investigations indicated a high capacity for PEP to remove petroleum hydrocarbons from the contaminated water. An experimental total petroleum hydrocarbon (TPH) adsorption capacity of 275 mg/g PEP was obtained at the natural pH of water. The experimental data fit best with the Freundlich isotherm model and pseudo-second-order adsorption model. The second phase of the experiment evaluated the performance of the O3/H2O2 process in the removal of residual TPH from pretreated water and compared the results with that of raw water. The O3/H202 process attained a maximum TPH removal rate for the pretreated water after 70 min, when 93% of the residual TPH in the effluent of the adsorption system was removed. Overall, the combination of adsorption onto PEP for 100 min and the subsequent treatment with the O3/H2O2 process for 70min eliminated over 99% of the TPH of highly petroleum-contaminated groundwater, with initial values of 162 mg/L. Therefore, we can conclude that the developed treatment system is an appropriate method of remediation for petroleum-contaminated waters.
受石油烃污染的地下水采用粉末化膨胀珍珠岩（PEP）吸附与臭氧/双氧水工艺相结合的系统进行处理。预处理研究表明，PEP 对去除受污染水中的石油烃具有很高的容量。在水的自然 pH 值下，获得了实验总石油烃（TPH）吸附容量为 275mg/g PEP。实验数据与 Freundlich 等温线模型和拟二级吸附模型拟合最好。实验的第二阶段评估了 O3/H2O2 工艺在去除预处理水中残留 TPH 的性能，并将结果与原水进行了比较。O3/H202 工艺在吸附系统出水的残留 TPH 去除 93%后，对预处理水达到了最大 TPH 去除率，当吸附系统出水的残留 TPH 去除 93%后，O3/H202 工艺在 70min 后达到了最大 TPH 去除率。总体而言，PEP 吸附 100min 与 O3/H2O2 工艺随后处理 70min 的组合，消除了受高度石油污染的地下水中超过 99%的 TPH，初始值为 162mg/L。因此，我们可以得出结论，所开发的处理系统是一种用于受石油污染水的修复的合适方法。
