Electrokinetic enhancement of phenanthrene biodegradation in creosote-polluted clay soil

被引：60

作者：

Niqui-Arroyo, Jose-Luis ^{[1
]}

Bueno-Montes, Marisa ^{[1
]}

Posada-Baquero, Rosa ^{[1
]}

Ortega-Calvo, Jose-Julio ^{[1
]}

机构：

[1] CSIC, Inst Recursos Nat & Agrobiol, E-41080 Seville, Spain

来源：

ENVIRONMENTAL POLLUTION | 2006年 / 142卷 / 02期

关键词：

polycyclic aromatic hydrocarbons; bioremediation; electrokinetics; electro-osmosis; desorption;

D O I：

10.1016/j.envpol.2005.10.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Given the difficulties caused by low-permeable soils in bioremediation, a new electrokinetic technology is proposed, based on laboratory results with phenanthrene, to afford bioremediation of polycyclic aromatic hydrocarbons (PAH) in clay soils. Microbial activity in a clay soil historically polluted with creosote was promoted using a specially designed electrokinetic cell with a permanent anode-to-cathode flow and controlled pH. The rates of phenanthrene losses during treatment were tenfold higher in soil treated with an electric field than in the control cells without current or microbial activity. Results from experiments with Tenax-assisted desorption and mineralization of C-14-labeled phenanthrene indicated that phenanthrene biodegradation was limited by mass-transfer of the chemical. We suggest that the enhancement effect of the applied electric field on phenanthrene biodegradation resulted from mobilization of the PAH and nutrients dissolved in the soil fluids. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：326 / 332

页数：7

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