Source Apportionment Of Atmospheric Dustfall And Its Effect On Heavy Metal Accumulation In Soil In Tongling City

Atmospheric dustfall is a kind of particle pollution whose size is more than 10 μm (Dp>10μm). Pollution elements carried by dustfall are Hg Cd Cu As S Sr Pb Zn, Ni and so on. they are dificult to degrade in the acceptors and have high toxicity and accumulative effects so as to cause the second severe pollution to the surrounding biosphere.Tongling is a heavy industry city in Anhui province, in this paper it is selected to study the effects on heavy in dustfall on the ecosystem. We collected 18 dustfall samples and 18 soil samples. At the same time, 5 samples of sources: soil dust, coal smoke dust, steel dust, traffic dust and mining dust were also collected. Content of 13 elements (As Cu Pb Zn Hg Cd ect. ) in all samples were measured by ICP-AES and spectrophotometer. EF and CMB receptor model is used to make source apportiontment of the dustfall. Because the contribution of mining dust, steel dust and coal smoke dust are more than two sources, we utilize the method of Hakanson and EF to make evaluation the heavy metal element in the soil. The results suggestthat the Cd pollution is the most serious element. The correlation beween EF of elements in dustfall samples and these in soil samples indicate that EF of As Cd Cu Zn elements between dustfall and soil has close relationship, i.e. the prominent contribution of from dustfall to soil is from these 4 elements.