摘要
Mercury species in water column, sediment and fish from the Hg-contaminated Baihua Reservoir were measured by trap pre-concentration and CVAFS and CVAAS detection methods. The results showed that the highest average total Hg concentration is up to {73.36} ng/L in the water column, {186.7} ng/L in pore water of surface sediment in the Baihua Reservoir. The total mercury concentrations in the sediments range from {0.87} to {33.74} mg/kg. This suggests that sediment re-suspending and Hg input from the upstream organochemical plant are the main mercury sources of water body for this reservoir. In addition, the possible reason why mercury is low in fish is that the low DOC and high pH are infavarable to methylmercury formation or absorption by fish.
Mercury species in water column, sediment and fish from the Hg-contaminated Baihua Reservoir were measured by trap pre-concentration and CVAFS and CVAAS detection methods. The results showed that the highest average total Hg concentration is up to 73.36 ng/L in the water column, 186.7 ng/L in pore water of surface sediment in the Baihua Reservoir. The total mercury concentrations in the sediments range from 0.87 to 33.74 mg/kg. This suggests that sediment re-suspending and Hg input from the upstream organochemical plant are the main mercury sources of water body for this reservoir. In addition, the possible reason why mercury is low in fish is that the low DOC and high pH are infavarable to methylmercury formation or absorption by fish.
基金
ThisprojectwasfinanciallysponsoredbytheChineseAcademyofSciencesunder"HundredTalentPlan"andthroughaninnovationproject(KZCX2105),andbytheNationalNaturalScienceFoundationofChina(GrantNo.40173037).
关键词
水银
水生生态系统
水库
生物地球化学
水体环境
concentration and distribution
mercury species
reservoir
aquatic ecosystem
