123rd General Meeting of the KCS

Type Oral Presentation
Area Student Oral Presentation
Room No. Room 203
Time THU 09:30-09:45
Code ENVR.O-3
Subject Sb speciation and distribution in soils near a Sb refining factory and a shooting range
Authors Soo-Chan Park, Man Jae Kwon1,*
Department of Earth and Environmental Sciences, Korea University, Korea
1Korea University, Korea
Abstract A large quantity of Sb, the 9th-most mined metal worldwide, and Sb-contained compounds have been released into the surface and subsurface environments. Sources of Sb release include abrasion from brake linings, use as flame retardants, plastic production, mining and shooting activities. Though the ecotoxicity of Sb is not well known, Sb(III) compounds are generally considered to be more toxic and mobile than Sb(V), similar to that of As. Therefore, distribution, speciation, toxicity and bioavailability in various environmental compartments are some of main interests related to Sb and important for human and ecosystem health. In this study, the Sb distribution and biogeochemical characteristics of contaminated soils in the vicinity of Sb refining factory (n=22), antimony waste landfill site (n=14) and shooting range (n=12) in South Korea were investigated. Soil samples adjacent to Sb refining factory (220～4918 mg/kg)　and antimony waste landfill site (25.65～12432.5 mg/kg)　generally represented higher Sb concentrations than those in the shooting range (15～39.8 mg/kg). However, the samples from the shooting range showed multiple contamination with Pb and other heavy metals. Except the landfill site, the concentrations of Sb were also depth dependent and markedly decreased with depth. Microbial population determined by the most probable number at each site showed relatively low cell number (104～105) in the sites with high Sb concentrations than uncontaminated soils (106～107). 16S rDNA analysis will be used to characterize the microbial community structures in each site which will be discussed in the relation to the content and speciation of Sb in soils determined by X-ray Absorption Fine Structure (XAFS) and sequential extraction analysis.
E-mail hamko200@korea.ac.kr