CHEN Qiu-ping, XU Si-qin*, SUN Hao-ran, REN Hong-yang, XU Shi-long, ZHANG Ying-xue 

（Key Laboratory of Karst Environment and Geohazard Prevention (Guizhou University), Ministry of Education, Ministry of Land and Resource, Guiyang 550003, China） 

Abstract: The contents of As and Sb in soils of the Qinglong antimony mining area were analyzed and the speciation distribution and bioavailability of As and Sb were investigated, and the single factor pollution index and the risk assessment code (RAC) were used to evaluate the pollution status and the potential ecological risk in soil samples, respectively. The results showed that the contents of As and Sb were high and there was a great difference from one sample to another. The speciation of As and Sb in soils follows the distribution order of residual fraction> reducible fraction, oxidisable fraction, mild acido-soluble fraction>water-soluble fraction. The concentrations of easily bioavailable antimony were 0.002～14.107 mg/kg and accounted for 0.08%～3.26% while 0.001～0.347 mg/kg and 0.01%～1.08% with respect to arsenic. Based on the single factor pollution index assessment results, the antimony mining area had a high pollution level, following the order of Sb>As. And the two metals range from 14.59 to 1970.98, indicating that the whole potential ecological risk of the two metals in the antimony mining area was low, and the pollution of the same area should be taken into consideration seriously. 

Key words: arsenic; antimony; speciation; potential ecological risk; antimony mining area 

EARTH AND ENVIRONMENT Vol. 42, No.6, Tot No.302, 2014, Page 773-778