摘要
运用TaPL3模型研究了兰州半干旱地区典型有机污染物通过大气和水体的长距离迁移(LRT)及其总持久性(Pov),讨论了LRT和Pov之间的关系.以2,3,7,8-TCDD为例,分别利用灵敏度和蒙特卡罗方法对模型的关键参数和输出结果的不确定性进行了研究.结果显示:2,3,7,8-TCDD,γ-HCH,BaP和HCB在兰州地区通过大气的特征迁移距离(CTD)分别为126,934,117和13 307 km,Pov分别为1 421,1 082,1 413和3 949 d;通过水体的CTD分别为6 633,119 000,16 249和16 658 km,Pov分别为1 584,1 551,2 711和4 428 d,且污染物的LRT和Pov没有直接的联系.同国外的研究相比,兰州地区的2,3,7,8-TCDD通过大气的CTD明显偏低,通过水体的CTD明显偏高,而Pov都明显偏高.
The long-range transport （LRT） and overall persistence （Pov） of typical organic pollutants through air and water in the semi-arid Lanzhou area were estimated by TaPL3 model. The relationship between LRT and Po, was discussed. The model uncertainties and key parameters were examined and evaluated by a sensitivity study and the Monte Carlo method for 2,3,7,8-TCDD. Modeling results indicate that the characteristic travel distance （CTD） of 2,3,7,8-TCDD, v-HCH, BaP and HCB in air and the Pov values in Lanzhou area are 126, 934, 117 and 13,307 km, and 1,421, 1,082, 1,413 and 3,949 d, respectively. The CTD in water and the Pov values are 6,633, 119,000, 16,249 and 16,658 kin, and 1,584, 1,551, 2,711 and 4,428 d, respectively. There is no explicit relationship between LRT and Pov- Compared with foreign research, it was found that the CTD of 2,3,7,8-TCDD in air is markedly lower and distinctly higher in water. On the other hand, the Pov in both air and water is obviously higher.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2010年第1期62-67,共6页
Research of Environmental Sciences
基金
甘肃省自然科学基金项目(0803RJZA085)
兰州大学优秀博士立项项目
