CAJ | 학술논문

　　为了研究天津市城区大气中各种元素的赋存和迁移转化特征，开展了为期一年的大气干湿沉降物质采集及相关研究工作。研究结果显示：1）大气干湿沉降物中Cd、Hg、Zn、S等元素质量分数为土壤背景值10倍以上；2)燃煤是天津市大气干湿沉降物的重要来源；3）大气干湿降尘量以及各元素质量分数与周边的环境密切相关，工业区沉降物质中重金属元素含量更高；4）通过模型计算可知大气干湿沉降会显著改变表层土壤中的元素含量，也证明大气干湿沉降是城区及近郊的土壤重金属富集的重要原因。
　　위료연구천진시성구대기중각충원소적부존화천이전화특정，개전료위기일년적대기간습침강물질채집급상관연구공작。연구결과현시：1）대기간습침강물중Cd、Hg、Zn、S등원소질량분수위토양배경치10배이상；2)연매시천진시대기간습침강물적중요래원；3）대기간습강진량이급각원소질량분수여주변적배경밀절상관，공업구침강물질중중금속원소함량경고；4）통과모형계산가지대기간습침강회현저개변표층토양중적원소함량，야증명대기간습침강시성구급근교적토양중금속부집적중요원인。
In order to find out how the elements host and transfer in the air of Tianjin urban area, we carried out a annual sample collection of dry and wet atmospheric deposit and subsequent study based the data. The results show: (1)the concentration of Cd, Hg, Zn, S in dry and wet atmospheric deposit is more than 10 times of the back-ground concentration.(2)Coal combustion is important source of dry and wet atmospheric deposit.(3)deposit weight and elements concentration in it have high correlation with nearby environment, the heavy metal concen-tration of deposit in industry area is much higher than others.(4) we found out that dry and wet atmospheric depo-sition would change the elements concentration of top soil remarkably based on modeling and calculation, which also confirm the deposition is important cause of heavy metal accumulation in urban and suburb soil of Tianjin.