Copper complexation by fulvic acid affects copper toxicity to the larvae of the polychaete Hydroides elegans

doi:10.1016/j.marenvres.2007.06.001

	Copper complexation by fulvic acid affects copper toxicity to the larvae of the polychaete Hydroides elegans
	Qiu, Jian-Wen ; Tang, Xiao ; Zheng, Chuanbo ; Li, Yan; Huang, Yanfiang
	2007-12-01
发表期刊	MARINE ENVIRONMENTAL RESEARCH
ISSN	0141-1136
卷号	64 期号:5 页码:563-573
文章类型	Article
摘要	Copper toxicity is influenced by a variety of environmental factors including dissolved organic matter (DOM). We examined the complexation of copper by fulvic acid (FA), one of the major components of DOM, by measuring the decline in labile copper by anodic stripping voltammetrically (ASV). The data were described using a one-site ligand binding model, with a ligand concentration of 0.19 mu mol site mg(-1) C, and a logK' of 6.2. The model was used to predict labile copper concentration in a bioassay designed to quantify the extent to which Cu-FA complexation affected copper toxicity to the larvae of marine polychaete Hydroides elegans. The toxicity data, when expressed as labile copper concentration causing abnormal development, were independent of FA concentration and could be modeled as a logistic function, with a 48-h EC50 of 58.9 mu g 1(-1). However, when the data were expressed as a function of total copper concentration, the toxicity was dependent on FA concentration, with a 48-h EC50 ranging from 55.6 mu g 1(-1) in the no-FA control to 137.4 mu g 1(-1) in the 20 mg 1(-1) FA treatment. Thus, FA was protective against copper toxicity to the larvae, and such an effect was caused by the reduction in labile copper due to Cu-FA complexation. Our results demonstrate the potential of ASV as a useful tool for predicting metal toxicity to the larvae in coastal environment where DOM plays an important role in complexing metal ions. (c) 2007 Elsevier Ltd. All rights reserved.; Copper toxicity is influenced by a variety of environmental factors including dissolved organic matter (DOM). We examined the complexation of copper by fulvic acid (FA), one of the major components of DOM, by measuring the decline in labile copper by anodic stripping voltammetrically (ASV). The data were described using a one-site ligand binding model, with a ligand concentration of 0.19 mu mol site mg(-1) C, and a logK' of 6.2. The model was used to predict labile copper concentration in a bioassay designed to quantify the extent to which Cu-FA complexation affected copper toxicity to the larvae of marine polychaete Hydroides elegans. The toxicity data, when expressed as labile copper concentration causing abnormal development, were independent of FA concentration and could be modeled as a logistic function, with a 48-h EC50 of 58.9 mu g 1(-1). However, when the data were expressed as a function of total copper concentration, the toxicity was dependent on FA concentration, with a 48-h EC50 ranging from 55.6 mu g 1(-1) in the no-FA control to 137.4 mu g 1(-1) in the 20 mg 1(-1) FA treatment. Thus, FA was protective against copper toxicity to the larvae, and such an effect was caused by the reduction in labile copper due to Cu-FA complexation. Our results demonstrate the potential of ASV as a useful tool for predicting metal toxicity to the larvae in coastal environment where DOM plays an important role in complexing metal ions. (c) 2007 Elsevier Ltd. All rights reserved.
关键词	Copper Speciation Toxicity Larvae Fulvic Acid Dom
学科领域	Environmental Sciences ; Marine & Freshwater Biology ; Toxicology
DOI	10.1016/j.marenvres.2007.06.001
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000251201400003
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5174
专题	海洋环境腐蚀与生物污损重点实验室
作者单位	1.Hong Kong Baptist Univ, Dept Biol, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Jian-Wen,Tang, Xiao,Zheng, Chuanbo,et al. Copper complexation by fulvic acid affects copper toxicity to the larvae of the polychaete Hydroides elegans[J]. MARINE ENVIRONMENTAL RESEARCH,2007,64(5):563-573.
APA	Qiu, Jian-Wen,Tang, Xiao,Zheng, Chuanbo,Li, Yan,&Huang, Yanfiang.(2007).Copper complexation by fulvic acid affects copper toxicity to the larvae of the polychaete Hydroides elegans.MARINE ENVIRONMENTAL RESEARCH,64(5),563-573.
MLA	Qiu, Jian-Wen,et al."Copper complexation by fulvic acid affects copper toxicity to the larvae of the polychaete Hydroides elegans".MARINE ENVIRONMENTAL RESEARCH 64.5(2007):563-573.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
qiu-Copper complexat（229KB）			限制开放	--	浏览