Escobar-Alvarado L F, Vaca-Mier M, López R, Rojas-Valencia M N
Metropolitan Autonomous University, Azcapotzalco, 02200, Mexico City, Mexico.
Institute of Engineering, National Autonomous University of Mexico, 04510, Mexico City, Mexico.
Bull Environ Contam Toxicol. 2018 Feb;100(2):280-285. doi: 10.1007/s00128-017-2211-6. Epub 2017 Nov 29.
Used lubricant oils and metals can be common soil pollutants in abandoned sites. When soil is contaminated with various hazardous wastes, the efficiency of biological treatments could be affected. The purpose of this work was to investigate the effect of combining phytoremediation and composting on the efficiency of hydrocarbon degradation and lead solubility in a soil contaminated with 31,823 mg/kg of total petroleum hydrocarbon (TPH) from used motor oil and 8260 mg/kg of lead. Mexican cactus (Opuntia ficus indica) and yard trimmings were added in the composting process, and lucerne (Medicago sativa) was used in the phytoremediation process. After a 9 week composting process, only 13% of the initial TPH concentration was removed. The following 20 week phytoremediation process removed 48% of TPH. The highest TPH degradation percentage (66%), was observed in the experiment with phytoremediation only. This work demonstrates sustainable technologies, such as biological treatments, represent low-cost options for remediation; however, they are not frequently used because they require long periods of time for success.
废旧润滑油和金属可能是废弃场地常见的土壤污染物。当土壤被各种危险废物污染时，生物处理的效率可能会受到影响。这项工作的目的是研究在受来自废旧机油的31823毫克/千克总石油烃（TPH）和8260毫克/千克铅污染的土壤中，植物修复与堆肥相结合对烃类降解效率和铅溶解度的影响。在堆肥过程中添加了墨西哥仙人掌（仙人掌）和庭院修剪物，在植物修复过程中使用了紫花苜蓿（紫花苜蓿）。经过9周的堆肥过程，仅去除了初始TPH浓度的13%。接下来的20周植物修复过程去除了48%的TPH。在仅进行植物修复的实验中观察到最高的TPH降解率（66%）。这项工作表明，诸如生物处理等可持续技术是低成本的修复选择；然而，它们并不经常被使用，因为它们需要很长时间才能成功。
