摘要:
应用Ⅲ级多介质逸度环境模型研究了研究区3种有机氯农药p,p-’DDT、p,p-’DDE、p,p-’DDD的多介质行为。模型的计算结果表明:在研究区大气、水和沉积物中p,p-’DDT的浓度分别为0.019 8g/m3、0.016 8ng/L0、.313ng/g;p,p-’DDE的浓度分别为0.019 9g/m30、.001 65ng/L、0.124ng/g;p,p-’DDD的浓度分别为0.001 98g/m3、0.004 68ng/L、0.083 2ng/g。沉积物中的有机氯农药的含量占环境中有机氯农药总滞留量的99%以上,是有机氯农药的最主要的汇。然后计算了3种有机氯农药在环境中的相间迁移通量,其中水-沉积物迁移和沉积物-水迁移是最重要的迁移过程。
Abstract:
This paper examines the multimedia environmental behavior of three kinds of organochlorine pesticides,p,p’-DDT、p,p’-DDE、p,p’-DDD in a bay of Hainan,China.A fugacity level Ⅲ multimedia environmental model is used.The model results indicate that the concetrations of p,p’-DDT in air,water and sediment are(0.019 8)g/m~3,(0.016 8)ng/L,0.313ng/g,respectively;p,p’-DDE is(0.019 9)g/m~3,(0.0016 5)ng/L and 0.124ng/g,respectively;p,p’-DDD is(0.0019 8)g/m~3,(0.004 68)ng/L,(0.083 2)ng/g,respectively.Sediments are the most important sinks,which accumulate to more than 99% of the total organochlorien pesticides.The transfer mass of p,p’-DDT,p,p’-DDE,p,p’-DDD are also calculated.The results show that transfer processes on interfaces of the water-sediment and sediment-water are the primary routes for organochlorine pesticides.
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