Remediation of soils combining soil vapor extraction and bioremediation: Benzene
Remediation of soils combining soil vapor extraction and bioremediation: Benzene
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DOI：
10.1016/j.chemosphere.2010.06.036
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发表时间：
2010-08-01
期刊：
影响因子：
8.8
通讯作者：
Delerue-Matos, Cristina
中科院分区：
文献类型：
--
作者：
Soares, Antonio Alves;Albergaria, Jose Tomas;Delerue-Matos, Cristina
本文报道了土壤气相抽提（SVE）与生物修复（BR）相结合修复苯污染土壤的研究。对不同含水量和天然有机质含量的苯污染土壤进行了研究。主要目标是：（i）评估SVE在修复时间和过程效率方面的性能;（ii）研究两种技术的组合，以确定能够实现法律的清理目标的最佳选择;（iii）评估土壤含水量（SWC）和天然有机质（NOM）对SVE和BR的影响。SVE对桑迪土壤的修复效率高于92%，对腐殖土的修复效率高于78%;（B）修复时间从2小时到45小时不等，具体取决于土壤;（ii）BR是一种有效的SVE补充技术;（iii）（a）当使用高气流速率时，SWC对SVE的影响最小，低气流速率下修复时间更长;（B）NOM作为微生物和营养物质的来源，提高了BR，但由于限制了苯从土壤向气相的传质，阻碍了SVE。(C)2010爱思唯尔有限公司版权所有。
This work reports the study of the combination of soil vapor extraction (SVE) with bioremediation (BR) to remediate soils contaminated with benzene. Soils contaminated with benzene with different water and natural organic matter contents were studied. The main goals were: (i) evaluate the performance of SVE regarding the remediation time and the process efficiency; (ii) study the combination of both technologies in order to identify the best option capable to achieve the legal clean up goals; and (iii) evaluate the influence of soil water content (SWC) and natural organic matter (NOM) on SVE and BR.The remediation experiments performed in soils contaminated with benzene allowed concluding that: (i) SVE presented (a) efficiencies above 92% for sandy soils and above 78% for humic soils; (b) and remediation times from 2 to 45 h, depending on the soil; (ii) BR showed to be an efficient technology to complement SVE: (iii) (a) SWC showed minimum impact on SVE when high airflow rates were used and led to higher remediation times for lower flow rates; (b) NOM as source of microorganisms and nutrients enhanced BR but hindered the SVE due the limitation on the mass transfer of benzene from the soil to the gas phase. (C) 2010 Elsevier Ltd. All rights reserved.