In order to reveal the pollution state of sediment in dump site,we determined the acid volatile sulfides (AVS)and simultaneously extracted metals(SEM)of surface sediment collected from the marine dump site of Cangnan,and the AVS,SEM,ΣSEM-AVS and their distributions were also analyzed.The result showed that the AVS in the surface sediment of dump site was between 0.19-1.88μmol·g-1,and the AVS in sediment near dump site was higher than the circumjacent areas.The mean value of SEM was 2.4μmol·g-1,and the contents of SEM were increased toward to dump site.At the mention of the contribution to ΣSEM from single heavy metal,the order was Zn > Cr > Cu > Pb > Cd,and the contribution of zinc basically was higher up to 50%,while the cadmium was less than 1%;therefore,the distribution was mainly controlled by zinc.The rations were larger than zero of ΣSEM-AVS;furthermore,ΣSEM-AVS in the dump site and nearby area was higher than the seacoast stations.The metals(SEM) in the surface sediment of dump site posed toxicity to the organisms,thus,there could be potential heavy metals ecological risk in the dump site.
徐国锋, 秦铭俐, 朱志清, 崔永平. 苍南海洋倾倒区沉积物中酸可挥发性硫化物与重金属的研究[J]. , 2012, 31(4): 452-455.
XU Guo-feng, QIN Ming-li, ZHU Zhi-qing, CUI Yong-ping. Study on acid volatile sulfide and trace metals in sediments of marine dump site of Cangnan. , 2012, 31(4): 452-455.
[6] DORNBLASER M,CIBLIN A E,FRY B.Effect of sulfate concentration in the overly water on sulfate reduction and sulfur storage in lake sediments [J].Biogeochem,1994,24:129-144.
[8] DITORO D M,MAHONY J D,HANSEN D J.Acid volatile sulfide predicts the acute toxicity of cadmium and nickel in sediments[J].Environment Science Technology,1992,26:96-101.
[9] ANKLEY G T.Evaluation of the toxicity of marine sediments and dreg spoils with the microtox bioassay[J].Chemosphere,1989,18(9~10):2069-2075.
