Seasonal Variation of Acid Volatile Sulfide and Simultaneously Extracted Metals in Sediment Cores from the Pearl River Estuary

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Seasonal Variation of Acid Volatile Sulfide and Simultaneously Extracted Metals in Sediment Cores from the Pearl River Estuary
	Yang, YQ ; Zhang, L ; Chen, FR ; Kang, ML ; Wu, SJ ; Liu, JS
刊名	SOIL & SEDIMENT CONTAMINATION
	2014
卷号	23 期号:4 页码:480-496
关键词	Heavy metals AVS SEM seasonal variation bioavailability
ISSN号	1532-0383
通讯作者	frchen@gig.ac.cn
中文摘要	The simultaneously extracted metals/acid volatile sulfide (SEM/AVS) method is widely used to estimate the toxicity of metals in sediment. In this study, SEM and AVS concentrations were obtained by the cold-acid purge-and-trap technique during spring (April) and winter (December) at six sites in the Pearl River estuary. Total organic carbon, grain size distribution, and total metals were also measured in winter samples. AVS concentrations in spring sediments were slightly higher than those in winter sediments, except at site 2. AVS concentrations showed more distinct locational and temporal variation compared with SEM concentrations. Generally, AVS contents increased downcore, whereas SEM concentrations decreased slightly with depth. Higher SEM concentrations were observed in the west shoal (sites 2, 6, and 7) and site 4 (1.24 approximate to 4.28mol center dot g(-1)) compared with those at sites 1 and 3 (0.73 approximate to 2.14mol center dot g(-1)) in the middle shoal. Most SEM metals have a significant linear positive correlation with the total metals, especially for Cd, Zn, and Pb, which were easily extracted by 1M HCl compared with Cr and Ni. According to the toxicity threshold value of 1.7mol center dot g(-1) for the difference of SEM-AVS, a toxic effect is expected at sites 1, 2, and 4 in spring and at sites 4, 6, and 7 in winter, which also indicates a relatively obvious seasonal variation in heavy metal bioavailability. However, comparisons between the total heavy metal concentrations in winter sediments with the sediment quality guidelines of ERLs/ERMs and TELs/PELs showed that adverse biological effects may occasionally occur at sites 2, 4, 6, and 7. Therefore, SEM/AVS prediction in conjunction with sediment quality guidelines can give a more reliable evaluation of the bioavailability of heavy metal in sediments.
学科主题	Environmental Sciences & Ecology
收录类别	SCI
资助信息	National Natural Science Foundation of China [40903047]; Chinese Academy of Sciences [ZKCX2-SW-212]
原文出处	TAYLOR & FRANCIS INC
WOS记录号	WOS:000328533100008
公开日期	2014-12-11
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10550]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Yang, YQ,Zhang, L,Chen, FR,et al. Seasonal Variation of Acid Volatile Sulfide and Simultaneously Extracted Metals in Sediment Cores from the Pearl River Estuary[J]. SOIL & SEDIMENT CONTAMINATION,2014,23(4):480-496.
APA	Yang, YQ,Zhang, L,Chen, FR,Kang, ML,Wu, SJ,&Liu, JS.(2014).Seasonal Variation of Acid Volatile Sulfide and Simultaneously Extracted Metals in Sediment Cores from the Pearl River Estuary.SOIL & SEDIMENT CONTAMINATION,23(4),480-496.
MLA	Yang, YQ,et al."Seasonal Variation of Acid Volatile Sulfide and Simultaneously Extracted Metals in Sediment Cores from the Pearl River Estuary".SOIL & SEDIMENT CONTAMINATION 23.4(2014):480-496.