| 南京地区典型有机污染物长距离输送潜力研究 |
| 摘要点击 2078 全文点击 1006 投稿时间：2011-09-28 修订日期：2011-10-27 |
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| 中文关键词 南京地区 典型有机污染物 长距离输送潜力 灵敏度分析 不确定分析 |
| 英文关键词 Nanjing typical organic pollutants long-range transport potential sensitivity analysis uncertainty analysis |
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| 中文摘要 |
| 为研究典型有机污染物在南京地区的长距离输送潜力,以p,p'-DDT、γ-HCH、BaP和HCB为研究对象,运用TaPL3模型计算了其在研究区大气及水体中的长距离输送潜力. 结果表明,BaP和p,p'-DDT通过大气的特征迁移距离(CTD)较小,分别为198 km和255 km,表现为大气污染长距离输送能力较小,污染较难扩散; 而γ-HCH和HCB则更倾向于通过水体或大气进行长距离输送,其水体CTD分别为91558 km和19056 km,大气CTD分别为1858 km和21104 km,有利于其在研究区的扩散; 水对γ-HCH和HCB的黏着度为负值,分别为-2.1和-54.86,表明γ-HCH和HCB更倾向于滞留在大气环境中,其通过大气并达到稳态后在大气中的质量分数为0.551%和2.2%; 通过水体且达到稳态后在大气中的质量分数为0.149%和1.05%,高于p,p'-DDT和BaP. |
| 英文摘要 |
| In this study, the long-range transport potentials (LRTP) of typical organic pollutants including p,p'-DDT, γ-HCH, BaP and HCB in air and water of Nanjing were estimated using the TaPL3 model. The research results showed that the characteristic travel distances (CTD) of BaP and p,p'-DDT through air were relatively low, 198 km and 255 km, respectively, indicating relatively low LRTP and difficulty in pollution dispersion. In contrast, γ-HCH and HCB tended to transport over longer distances through water and air, with CTD values of 91558 km and 19056 km in water and 1858 km and 21104 km in air, respectively, indicating that the dispersion of pollution in air and water of the studied area was relatively easy. Furthermore, the stickiness of γ-HCH and HCB in water was negative, and the values were -2.1 and -54.86, respectively, indicating that γ-HCH and HCB tended to remain in the atmosphere. The mass fractions in air after they passed air and achieved the steady state were 0.551% and 2.2%, respectively, whereas the mass fractions in air after they passed water and achieved the steady state were 0.149%and 1.05%, respectively, which were higher than those of p,p'-DDT and BaP. |
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