湖泊科学2019，Vol.31Issue(1)：72-80,9.DOI:10.18307/2019.0107
抚仙湖表层沉积物AVS与SEM分布特征及其生态风险评估
Distribution characteristic and ecological risk assessment of AVS and SEM in surface sediments of Lake Fuxian
摘要
Abstract
The concentrations of acid volatile sulfide (AVS) and simultaneously extracted metals (SEM) were analyzed in 16 surface sediment samples (0-5 cm) from Lake Fuxian. The potential ecological risks of heavy metals were also evaluated by the molar ratio of ∑SEM to AVS. Results show that obvious distinction of AVS distribution are existed in the south and north lake zone. There is uniform distribution in the south lake zone which has an average AVS concentration of 0.074±0.043 μmol/g. However, the north lake zone displays a increasing trend from the littoral to pelagic area (N9) and has an average AVS concentration as high as 0.317±0.485 μmol/g. SEM is mainly concentrated at two points, Laoaodi (N5) and Dongda River estuary (N4) in the north lake zone.As for the south lake zone, SEM is mainly concentrated at S2, Luju River estuary. With the exception of Niumo River estuary (S5), Liangwang River estuary (N3) and N9, [∑SEM]/[AVS]of all the remaining sites are higher than 1, and the average[∑SEM]/[AVS]in south lake zone (3.51±1.91) significantly exceeds that in north lake zone (2.19±2.10). Therefore, ecological risk in Lake Fuxian especially in south lake zone should be taken seriously.关键词
抚仙湖/沉积物/酸可挥发性硫化物/同步提取重金属/风险评估Key words
Lake Fuxian/sediments/acid volatile sulfide/simultaneously extracted metals/risk assessment引用本文复制引用
李彪,荀凡,陈向超,马书占,王亚蕊,冯慕华..抚仙湖表层沉积物AVS与SEM分布特征及其生态风险评估[J].湖泊科学,2019,31(1):72-80,9.基金项目
国家自然科学基金项目(41471075,41877482) （41471075,41877482）
江苏省高校水处理技术与材料协同创新中心项目联合资助 （）
