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

doi:10.1016/j.marenvres.2007.06.001

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋腐蚀与防护研究发展中心

	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
刊名	MARINE ENVIRONMENTAL RESEARCH
	2007-12-01
卷号	64 期号:5 页码:563-573
关键词	Copper Speciation Toxicity Larvae Fulvic Acid Dom
ISSN号	0141-1136
DOI	10.1016/j.marenvres.2007.06.001
文献子类	Article
英文摘要	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.
学科主题	Environmental Sciences ; Marine & Freshwater Biology ; Toxicology
URL标识	查看原文
语种	英语
WOS记录号	WOS:000251201400003
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5175]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
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.