%0 Journal Article
%T AVS Concentrations in Xinan Creek and the Influencing Factors<br>西南涌酸挥发硫化物浓度水平及影响因素研究
%A LIU Xiao-bing
%A WEN Yan-mao
%A LI Feng
%A WU Chang-hua
%A DUAN Zhi-peng
%A <br>刘晓冰
%A 温琰茂
%A 利锋
%A 吴昌华
%A 段志鹏
%J 环境科学
%D 2012
%I 
%X Sediment and overlying water samples were collected at 10 sampling stations at Xinan Creek,a tidal river in Pearl River Delta,and analyzed for physical and chemical characteristics as well as microbial incicators,in order to reveal the main factors dominating the spatial distribution of acid volatile sulfide(AVS).The effects of Eh,SRB OC and TS on the spatial distribution of AVS were investigated and the impact of AVS on the toxicity of heavy metals in the studied area was evaluated.The results showed that the range of AVS was 0.207-41.453 μmol·g-1,with an average of 6.684 μmol·g-1,which is relatively high compared to the results in other studies.The AVS value of the surface layer was higher than the bottom layer in 5 stations.The AVS values in both the surface layer and the bottom layer were highly variable,the coefficients of variation being 93.61% and 153.09%,respectively.The analytical results revealed that TS was the factor with the greatest impact on the spatial distribution of AVS,and the order was TS>OC>Eh>SRB.Potential ecological risk of heavy metals existed in 60% of the smpling stations based on the value of (SEM5-AVS),however,with the criterion of (SEM5-AVS)/fOC,none of them had inacceptable ecological risk.Furthermore,in terms of single species of heavy metals,there was certain risk of toxic effect for all the five heavy metals(Cd,Ni,Cu,Zn and Pb).The above mentioned results will provide valuable data for the in-depth study of the formation mechanism of AVS and helpful reference for environmental impact assessment and scientific rehabilitation of heavy metals in polluted rivers.
%K acid volatile sulfide(AVS)
%K simultaneously extracted metals(SEM)
%K spatial distribution
%K influencing factors
%K biotoxicity<br>酸挥发硫化物
%K 同步提取金属
%K 空间分布
%K 影响因素
%K 生物毒性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=470342632029DB6A31A12F113B06A18C&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=DF92D298D3FF1E6E&sid=96782C0B0FEF5F72&eid=3CE4809583EA9894&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=42