近年来，PM2.5已成为大气污染的研究热点问题之一，因其具有更大的比表

近年来，PM2.5已成为大气污染的研究热点问题之一，因其具有更大的比表面积使之更易与有害颗粒物结合的特性而备受重视。PM2.5中附着的重金属因其形态不同而对环境及人体健康的影响有较大差异。本文采用Tessier五步提取法对PM2.5中Cu、Mn、Zn、Cd的化学形态展开了研究，得到以下结论：Cu在正常天气和沙尘天气下各形态平均分布，雨后可交换态增多；Mn在三种天气下均以前三态为主，占了总量的80%以上；Zn的化学形态分布与PH有关，当PH较高时以有机态和残渣态为主，PH降低时以可交换态为主；Cd在三种天气状况下可交换态和碳酸盐结合态所占比例均超过了60%，表现活跃。PM2.5中Cd生物有效性系数最高，Cu和Mn在0.5左右，Zn同样与PH相关。本次研究的结果有助于了解PM2.5中重金属对人体健康和环境的影响，也为包头市大气环境污染的治理提供一定的理论依据。

結果 (英文) 1:

In recent years, PM2.5 has become one of the hot issues in study of air pollution, because of its greater surface area makes it easier to attribute much importance to combining with harmful particulate matter. Attached to heavy metals in PM2.5 because of their different morphologies and effect on the environment and human health are quite different. This used Tessier five step extraction law on PM2.5 in the Cu, and Mn, and Zn, and Cd of chemical form expand has research, get following conclusions: Cu in normal weather and dust weather Xia the form average distribution, rain Hou can exchange State increased; Mn in three species weather Xia are yiqian three State mainly, accounted for has total of 80% above; Zn of chemical form distribution and PH about,In recent years, PM2.5 has become one of the hot issues in study of air pollution, because of its greater surface area makes it easier to attribute much importance to combining with harmful particulate matter. Attached to heavy metals in PM2.5 because of their different morphologies and effect on the environment and human health are quite different. This used Tessier five step extraction law on PM2.5 in the Cu, and Mn, and Zn, and Cd of chemical form expand has research, get following conclusions: Cu in normal weather and dust weather Xia the form average distribution, rain Hou can exchange State increased; Mn in three species weather Xia are yiqian three State mainly, accounted for has total of 80% above; Zn of chemical form distribution and PH about,When the PH is higher, mostly organic and residue and PH decreases in exchangeable; Cd in three kinds of weather conditions to exchangeable and carbonate combination in both the proportion of more than 60%, are active. PM2.5 in the coefficient of the highest bioavailability of Cd, Cu and Mn in the 0.5 per cent Zn also associated with PH. Results of this study will help understand the impact of heavy metals on human health and the environment in PM2.5, also provides a theoretical basis for the control of atmospheric pollution in baotou city.

結果 (英文) 3:

In recent years, PM2.5 has become one of the research hotspots of atmospheric pollution, because of its larger specific surface area and make it more easy and harmful particles combine and much attention. Attachment of the heavy metals in PM2.5 because of different shape and on the environment and human health effects are different. This paper uses Tessier five step extraction chemical morphology of PM2.5 in Cu, Mn, Zn, Cd began to study, get the following conclusions: Cu in normal weather and dust weather in the form of distribution, the exchangeable Mn increased; in three kinds of weather are before the three state dominated, accounting for more than the total amount 80%; chemical speciation of Zn associated with PH,When PH is high in the organic form and residual form, PH decreases as exchangeable form; Cd in three kinds of weather conditions, exchangeable and carbonate bound proportion was more than 60%, the performance of active. Effective coefficient Cd PM2.5 the highest, Cu and Mn in 0.5, Zn also associated with PH. The research results are helpful to understand the effect of PM2.5 metals on human health and the environment, but also control the atmospheric pollution in Baotou city to provide certain theoretical basis for the.