title: [Distribution of PGEs contents and its factors in snowfall and snow cover over the arid region in Changji City].
abstract: This paper was to select a small-medium sized City, Changji city, over the arid region, study the distribution of platinum group metals(PGEs) contents and influencing factors in snowfall and snow cover. Samples were analysed by ICP-MS. The results revealed that the annual contents of Rh, Pd and Pt in snowfall were on the average value of 0.43 ng.L-1 ranging from not detected to 2.24 ng.L-1 , 60.07 ng.L-1 ranging from 46.66 to 84.25 ng.L-1 and 4.54 ng.L-1 ranging from 3.02 ng.L-1 to 6.38 ng.L-1 respectively. The difference of PGEs levels was found in different occurrences of snowfall, tended to increase before snowfall due to the longer arid days. PGEs contents maybe influenced by the amount of snowfall, the less snowfall, the higher PGEs contents reflected. The annual levels of Rh, Pd and Pt in snow cover were in the range of 2.50-18.80 ng.L-1 (av. 6.65 ng.L-1), 46.83-199.20 ng.L-1 (av. 83.45 ng.L-1) ,4. 27-13.78 ng.L-1 (av. 8.17 ng.L-1) respectively. PGEs content in snow cover were far higher than that of snowfall, PGEs in snowfall were only obtained from atmospheric PGEs rinsed by single time of snowfall, while PGEs were not only from the accumulation of PGEs in frequent times of snowfall and the snow cover under the long time exposure, but also continuously accepted the PGEs from atmospheric dry deposition. PGEs content of snow cover in all sampling sites were demonstrated as follows: traffic area > residential-culture-education district > square of park > suburban farmland. the input way of PGEs in snow cover was found a remarkable difference with the amount of input within different function areas, which was the main reason caused that PGEs content of snow cover in each function area varied and had a certain regularity.
authors.affiliation: Institute of Environmental Science, Changji College, Changji 831100, China. yuyanliu006@sina.com
authors.forename: Yu-Yan
authors.initials: YY
authors.lastname: Liu
authors.forename: Hao-Feng
authors.initials: HF
authors.lastname: Liu
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
mesh_terms: D002681:China; D002947:Cities; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D010984:Platinum / Q000032:analysis*; D012413:Rubidium / Q000032:analysis*; D012914:Snow
chemical_list: D004785:Environmental Pollutants; D010984:Platinum; D012413:Rubidium