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《Acta Scientiae Circumstantiae》 2009-09
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Spatial and particle size distribution of mercury and arsenic on surface dust in spring in the Wuhu urban district

FANG Fengman,ZHANG Zhiming,CHEN Wenjuan,YANG Ding College of Territorial Resources and Tourism,Anhui Normal University,Wuhu 241003  
Mercury arsenic contents in Wuhu urban area dust,their spatial characteristics and particle size distributions were studied in the spring of 2008 in three districts(High-tech Development Zone,City Center,Economic and Technological Development Zone) . The Hg As concentrations in the study districts were 0.011~1.477 mg·kg-1 and 3.533~169.368 mg·kg-1 respectively. The mean concentrations of 0.230 mg·kg-1 for Hg and 15.371 mg·kg-1 for As were 1.9 and 1.5 times the soil background values. The Hg concentration was high in the Economic and Technological Development Zone,but As content was high in the High-tech Development Zone. Hg fit the middle spatial correlation which indicates that Hg is mainly influenced by the stochastic or human factor;As fit the strong spatial correlation,so it is mainly influenced by parent material of the soil,or land uses. In general,Hg and As concentrations increased as the particle size of the surface dust decreased,and the enrichment ratio showed the same tendency. The enrichment ratios of Hg and As were 63.5% and 55.8% respectively in the 0.074 mm particles(200 mesh) ,which shows that Hg is enriched on the tiny particles.
【Fund】: 安徽高校省级自然科学研究重点项目(No.KJ2009A137);; 安徽师范大学优秀创新团队建设计划~~
【CateGory Index】: X513
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