DocumentCode :
2447946
Title :
Distribution characteristic of AVS and SEM and toxicity to benthic organism of heavy metal in surface sediments of Lake Taihu
Author :
Wang, Peifang ; Liu, Jiajia ; Wang, Chao ; Qian, Jing ; Hou, Jun ; Li, Li´na
Author_Institution :
Key Lab. of Integrated Regul. & Resource, Hohai Univ., Nanjing, China
fYear :
2011
fDate :
24-26 June 2011
Firstpage :
2096
Lastpage :
2102
Abstract :
34 points of surface sediments in Taihu Lake were observed on the distribution of Acid Volatile Sulfide (AVS) and Simultaneously Extracted Metal (SEM), and the relativity was analyzed between contents of AVS, AEM and the physical and chemical indices of the surface sediments. Results show that there is a significant difference on the spatial distribution of AVS and SEM contents in the whole lake of Taihu. Among these, AVS concentrations were higher in Meiliang Bay, northern Zhushan Bay, estuary of Gonghu Bay, especially in Eastern Taihu Lake (with the content value of 33.80~43.76μmol/g), and SEM concentrations were higher in the Meiliang Bay, Zhushan Bay and Gonghu Bay. The analysis of relativity shows that AVS concentrations were higher in sediments with higher water content, higher organic matter, higher organic carbon and lower oxidation-reduction potential. Meanwhile, by using two indices of SEM/AVS and SEM-AVS to evaluate the quality of surface sediments (heavy metal of sediments will toxic when SEM/AVS>;9 or SEM-AVS>; 2), it indicates that heavy metals in sediments of 6, 12 and 32 points could generate remarkable toxicity on creatures, and heavy metals in sediments of 3, 5, 14, 15, 20 and 21 points could generate a toxicity on creatures, but not significant. In general, our results could give supports and data base for current evaluation on sediment quality and ecolgical security for Taihu Lake.
Keywords :
ecology; hazardous materials; lakes; organic compounds; sediments; toxicology; water pollution; AVS; Eastern Taihu Lake; Gonghu Bay; Meiliang Bay; SEM; acid volatile sulfide; benthic organism; ecolgical security; heavy metal; northern Zhushan Bay; organic carbon; organic matter; oxidation-reduction potential; simultaneously extracted metal; surface sediment quality; toxicity; water content; Chemicals; Copper; Educational institutions; Lakes; Lead; Sediments; Acid Volatile Sulfide (AVS); Simultaneously Extracted Metal (SEM); Taihu Lake; biological toxicity; sediments;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9172-8
Type :
conf
DOI :
10.1109/RSETE.2011.5964720
Filename :
5964720
Link To Document :
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