Abstract：Lead isotopes have been widely applied to tracing lead sources in the environment. Lead concentration and isotopic compositions (206Pb/207Pb and 208Pb/206Pb) of 23 intertidal surface sediments collected from Jiulong River downstream and surrounding known sources were analyzed to assess the spatial variation of lead, and to discuss the lead sources and their relative contributions using the dual member model and the three-end member model of lead isotopic ratios. The results show that the range of lead concentration in the intertidal surface sediments of Jiulong River downstream was 38.50~128.50mg/kg with the mean value of 80.60mg/kg. According to geoaccumulation index, enrichment factor and potential ecological risk index, the lead pollution degree was mild to moderate and the potential ecological risk of lead was mild in the sediments. The ranges of lead isotopic ratios of 206Pb/207Pb and 208Pb/206Pb are 1.1651~1.1924 and 1.9640~2.1071, respectively. Lead pollutants in most studied sediments mainly came from Fujian Pb-Zn deposit and parent soil material while seldom from vehicle exhaust. At the upstream of Jiulong River estuary, lead in the sediments were mainly from Pb-Zn deposit, parent soil material and coal, with the contribution rates of 26.74%~56.61%, 18.85%~19.91% and 24.20%~58.53%, respectively. At the outer end of Jiulong River estuary, lead were mainly from Pb-Zn deposit, parent soil material, coal and marine paints, with the contribution rates of 20.06%, 13.75%, 7.52% and 58.67%, respectively. At other sampling sites, the sediment lead mainly derives from Pb-Zn deposit and parent soil material with the contribution rates of 20.00%~95.62% and 4.38%~80.00%, respectively.
林承奇, 胡恭任, 于瑞莲. 福建九龙江下游潮间带沉积物铅污染及同位素示踪[J]. 中国环境科学, 2015, 35(8): 2503-2510.
LIN Cheng-Qi, HU Gong-Ren, YU Rui-Lian. Lead pollution and isotopic tracing in intertidal sediments of Jiulong River downstream. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2503-2510.
