Department of Geological Engineering, Canakkale Onsekiz Mart University, Canakkale, Turkey.
BiotecnIA, Department of Chemical Engineering, University of Vigo, Rua Maxwell s/n, Building Fundicion, 36310, Vigo, Spain.
Chemosphere. 2019 Jul;227:606-613. doi: 10.1016/j.chemosphere.2019.04.059. Epub 2019 Apr 15.
This study investigated the geological conditions of Biga Peninsula. There are metamorphic rocks, ophiolitic melange, plutonic rocks, subvolcanics, volcanic rocks and volcanoclastics along with marine and terrestrial sediments in the region. This variety of rocks and the associated minerals resulted in many interesting metallic ores and coal for commercial exploitation. The mining exploitations in Biga Peninsula (Turkey) pose an environmental risk due to the release of contaminants, metals and arsenic, to the soil and waterbodies. This study analyzed the potential release of As and metals (Al, Fe, Mn) from a sediment sampled in a mine pond. The extraction column tests proved that those contaminants can be dissolved from the sediment using deionized water as eluent. The electrokinetic treatment of the sediment was able to remove Al and Mn, but the removal of Fe and As was negligible. The fractionation of As and metals in the sediment confirmed that the electrokinetic treatment was able to mobilize the contaminants. Based on the results of this study, it has been hypothesized that the toxic elements could be removed by electrokinetics using facilitating agents, neutralizing the alkaline environment of the cathode and increasing the treatment time.
本研究调查了比加半岛的地质条件。该地区有变质岩、蛇绿混杂岩、深成岩、次火山岩、火山岩和火山碎屑岩，以及海洋和陆地沉积物。这些岩石的多样性以及相关的矿物质形成了许多有趣的金属矿石和煤炭，可供商业开采。由于污染物、金属和砷释放到土壤和水体中，比加半岛（土耳其）的采矿活动带来了环境风险。本研究分析了从矿区池塘中采集的沉积物中砷和金属（铝、铁、锰）的潜在释放。萃取柱试验证明，这些污染物可以用去离子水作为洗脱剂从沉积物中溶解出来。电动力学处理沉积物可以去除铝和锰，但去除铁和砷的效果可以忽略不计。沉积物中砷和金属的分馏证实，电动力学处理能够使污染物迁移。基于本研究的结果，人们假设可以使用促进剂通过电动力学去除有毒元素，使阴极的碱性环境中和，并增加处理时间。
