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作 者:吴莉萍[1] 赵大为[2] 张晓山[3] 王章玮[3] 张冬保[2] 叶堤[2] 刘伟[2]
机构地区:[1]西南师范大学生态资源与环境研究院,重庆400715 [2]重庆市环境科学研究院,重庆400020 [3]中国科学院生态环境研究中心大气室,北京100081
出 处:《微量元素与健康研究》2006年第2期38-41,共4页Studies of Trace Elements and Health
摘 要:基于2005年1月和4月对重庆市两区域(观音桥与铁山坪)冬季和春季颗粒汞的采样与分析,从颗粒物的角度了解了重庆市区汞污染情况,分析了颗粒汞在冬春季的污染特征,并利用理论模型估算了干沉降通量。观音桥样点冬季平均浓度分布在0.6351~1.819ng/m^3,春季在0.193-0.817ng/m^3;铁山坪样点,冬季颗粒汞平均浓度分布在0.164~0.902ng/m^3,春季分布在0.090~0.303ng/m^3。而按照模型估计,观音桥地区冬季干沉降通量约为12.97μg/(m^2·month),春季约为6.558btg/(m^2·month);对照点铁山坪地区干沉降通量约为6.0961μg/(m^2·month),春季干沉降通量约为1.423μg/(m^2·month),高于其他的一些研究,说明重庆汞污染问题相对严重一些。在受人为条件干扰大的情况下,季节度气象因素的影响相对变小。天气状况对汞浓度具有一定的影响,但对其量化还具有一定困难,需作进一步的工作。温度与汞浓度和TSP浓度都具有显著的负相关关系。夜间汞浓度高于白天的浓度。Based on sampling and analysis of particulate mercury in two districts of ChongQing in winter and spring 2004, this paper discussed the condition of mercury pollution in ChongQing from the particulate angle, analyzed the character of the pollution and assessed the flux of dry mercury deposition in ChongQing using the theoretical model. The results show that the concentration of mercury distributes in 0.164~0. 902ng/m^3 in Winter, 0. 090- 0. 303 ng/m^3 in Spring at TSP and 0. 351- 1. 819 ng/m^3 in Winter, 0.193 0.817 ng/m^3 in Spring at GYQ. The fluxes calculated by the model are 12.97μg/(m^2·month) in winter, 6,558μg/(m^2·month) in spring at GYQ and 6.096μg/(m^2·month) in winter, 1. 423μg/(m^2· month) in spring at TSP. The results are higher than that in other studies, showing the serious of mercury pollution in Chongqing and in the case of more human activities, the effect of meteorologic factor be weakened. It is important to measure the effect of the weather condition although it is difficult. The mercury concentration has negative correlation with temperature and is higher at night than in daytime.
分 类 号:X132[环境科学与工程—环境科学]
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