Abstract: Pentachlorophenol(PCP) and its sodium salt were studied. The region of interest is Jintan area in Jiangsu province where PCP has been used as pesticide against oncomelania for a long time. A dynamic multimedia fugacity model was constructed to model the environmental behavior of PCP in the area from 1959 to 2003 and the concentrations of PCP in environmental medium were calculated. For 1993, the results were compared with the monitoring data. The PCP concentrations in air, water, soil and sediment are 1.03×10^-4ng/m³，0.58μg/L，1.37μg/kg　and　4.91μg/kg respectively, and the orders are the same as those from monitoring data, while the PCP concentration in vegetation (19.2μg/kg) is one to two orders higher. Through uncertainty analysis, the influence of uncertainties of input parameters on model results has been studied.

Key words: environmental medium, fugacity model, concentration change, uncertainty analysis, sensitivity analysis

摘要： 以五氯酚(PCP)及其钠盐为研究对象，选择曾长期使用五氯酚钠杀灭钉螺的江苏省金坛地区为研究区域，建立动态多介质逸度模型对1959-2003年间PCP在该地区环境中的分布、迁移和转化进行模拟，得到了不同介质中PCP的质量浓度变化，其中1993年PCP在大气、水、土壤和沉积物中的质量浓度分别为1.03×10^-4ng/m³，0.58μg/L，1.37μg/kg和4.91μg/kg，与同年的实测值基本一致，植物相的值(19.2μg/kg)则高出实测值１～２个数量级。降解反应是PCP从该地区消失的主要途径。通过不确定性分析研究了输入参数的不确定性对结果的影响。

关键词: 环境介质, 逸度模型, 浓度变化, 不确定性分析, 灵敏度分析