| 吸附对土壤水环境中有机污染物生物降解过程的影响研究 |
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| 引用本文： | 刘凌,崔广柏.吸附对土壤水环境中有机污染物生物降解过程的影响研究[J].水科学进展,2000,11(4):401-407. |
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| 作者姓名： | 刘凌 崔广柏 |
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| 作者单位： | 河海大学水资源开发利用国家专业实验室, 江苏南京210098 |
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| 基金项目： | 国家自然科学基金项目(59909003)和高等学校博士学科点专项科研基金资助项目(97029401)。 |
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| 摘 要： | 在土壤水环境系统中,吸附作用是影响有机污染物生物降解过程的主要制约因素。污染物的吸附性越强,则其存在于土壤水溶液的重量百分比就越小,生物降解可能性也就越低。本文建立了定量描述吸附作用对有机污染物在土壤颗粒内部传输过程影响的数学模型。通过模型计算发现,有机污染物的土壤-水吸附分配系数Kd越大,则其从土壤颗粒内部传输到外部水溶液的速率就越小,总的降解速率也就越低。
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| 关 键 词： | 有机污染物 吸附 生物降解 土壤水环境 |
| 文章编号： | 1001-6791(2000)04-0401-07 |
| 收稿时间： | 2000-02-01 |
| 修稿时间： | 2000年2月1日 |
Effect of Sorption on Organic Biodegradation in Soil/Water System |
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| LIU Ling,CUI Guang-bai.Effect of Sorption on Organic Biodegradation in Soil/Water System[J].Advances in Water Science,2000,11(4):401-407. |
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| Authors: | LIU Ling CUI Guang-bai |
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| Affiliation: | Water Resources Development and Utilzation Laboratory, Hohai University, Nanjing 210098, China |
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| Abstract: | The sorption has major influence on organic pollutant biodegradation in soil/water system. It is found that the bioavailability of organic pollutant, as well as the fraction of organic pollutant exists in the aqueous phase at sorption equilibium, decreases along with the increase of soil-water partition coefficient Kd, or the increase of soil-water ratio in the system. A spherical model has been developed in this paper in order to describe quantitatively the effect of sorption on the transport of organic pollutant inside the soil particle. It is noteworthy that the overall organic biodegradation rate in the system is controlled by its sorption capacity. Chemical with a large Kd value with chemical will have low transport rate and low biodegradation rate in soil/water system. |
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| Keywords: | organic pollutant sorption biodegradation soil/water system |
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