| 土壤中难降解有机污染物锁定机理研究进展 |
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| 引用本文： | 李晓军,李培军,蔺昕. 土壤中难降解有机污染物锁定机理研究进展[J]. 应用生态学报, 2007, 18(7): 1624-1630 |
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| 作者姓名： | 李晓军 李培军 蔺昕 |
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| 作者单位： | 1.中国科学院沈阳应用生态研究所， 沈阳 110016；;2.沈阳大学环境工程重点实验室， 沈阳 110044 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);辽宁省博士后科研启动基金 |
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| 摘 要： | 有机污染物进入土壤后，随着与土壤接触时间的延长，被锁定在土壤中，生物可利用性下降.锁定可能导致过高估计难降解有机污染物的暴露风险，影响修复技术的实施.锁定发生的内在机制主要源于粘土矿物、有机质及非水相液体的不可逆吸附和微孔束缚，而影响土壤难降解有机污染物锁定的关键因素包括土壤物理化学性质和环境条件(湿度、温度、pH等).基于此，进一步阐明了目前土壤中难降解有机污染物锁定机理研究需要解决的问题，并对未来的发展趋势进行了展望.
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| 关 键 词： | 春小麦 补偿作用 苗期 刈割伤害 |
| 文章编号： | 1001-9332（2007）07-1624-07 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-102007-03-22 |
Research advances in sequestration mechanisms of hardly biodegradable organic contaminants in soil. |
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| LI Xiao-jun,LI Pei-jun,LIN Xin. Research advances in sequestration mechanisms of hardly biodegradable organic contaminants in soil.[J]. The journal of applied ecology, 2007, 18(7): 1624-1630 |
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| Authors: | LI Xiao-jun LI Pei-jun LIN Xin |
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| Affiliation: | 1.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China；;2.Key Laboratory of Environmental Engineering, Shenyang University, Shenyang 110044, China |
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| Abstract: | After entering into soil, organic contaminants often become increasingly less available to a variety of organisms and to non-vigorous extraction by organic solvents. This time-dependent reduction in availability results from the molecules sequestration by soil. Because of the sequestration, the exposure risk of hard biodegradable organic contaminants in soil may be overestimated, and the available remediation technologies are assessed incorrectly. The inherent mechanisms of the sequestration are the irreversible adsorption by clay minerals, organic matters and nonaqueous-phase liquids and the entrapment by micropores, while the key factors affecting the sequestration are the physicochemical characteristics of soil, properties of hardly biod.egradable organic contaminants, and environmental conditions, e.g. , moisture, temperature, pH and so on. Some critical problems in sequestration mechanisms study were pointed out, and the developing trend in this research field was prospected. |
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| Keywords: | hardly biodegradable organic contaminant sequestration bioavailablity |
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