Desorption kinetics of PAHs from aged industrial soils for availability assessment
Desorption kinetics of PAHs from aged industrial soils for availability assessment
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DOI：
10.1016/j.scitotenv.2013.10.032
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发表时间：
2014-02-01
影响因子：
9.8
通讯作者：
Morel, Jean Louis
中科院分区：
文献类型：
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作者：
Barnier, Christophe;Ouvrard, Stephanie;Morel, Jean Louis
持久性有机污染物(POPs)，如多环芳烃(PAHs)，可能在以前工业场所的土壤中发现高浓度，包括人工制造的天然气厂或焦化厂。使用中等溶剂萃取、生物试验或固相萃取的技术已被证明对污染可用性评估有用。然而，仍然需要专门适用于低浓度的更准确和可靠的测量工具。基于使用Tenax(R)树脂的固液萃取，我们建议了一种用于评估老工业废弃地土壤中多环芳烃的生物有效性的方案。测定了三种典型污染工业土壤的解吸动力学。使用一阶两室模型对结果进行建模，该模型提供了30h萃取期内快速解吸分数的估计值，该分数被认为是可用的。总之，在评估土壤污染相关风险时，这种允许测量有效分数的方法可能会被证明比总浓度值更具相关性。它还可以预测可实现的生物修复性能。(C)2013爱思唯尔B.V.保留所有权利。
Persistent organic pollutants (POPs), such as polycyclic aromatic hydrocarbons (PAHs), may be found in high concentrations in soils of former industrial sites including manufactured gas plants or coking plants. Techniques using moderate solvent extraction, biological tests or solid phase extraction have proved useful for pollution availability estimation. However, more accurate and reliable measurement tools specifically adapted to low concentrations are still needed. Based on a solid-liquid extraction using a Tenax (R) resin, we suggest a protocol to assess the bioavailability of PAHs, dedicated to aged industrial wasteland soils. Desorption kinetics were measured on three representative contaminated industrial soils. Results were modeled using a first order two-compartment model that provided an estimate of the rapidly desorbing fraction, which was considered to be available, over a 30 h extraction period. In conclusion, this method, allowing the measurement of the available fraction, might prove more relevant than the total concentration value when assessing soil contamination related risks. It may also predict achievable bioremediation performances. (C) 2013 Elsevier B.V. All rights reserved.