Phosphorus release in response to pH variation in the lake sediments with different ratios of iron-bound P to calcium-bound P

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Phosphorus release in response to pH variation in the lake sediments with different ratios of iron-bound P to calcium-bound P
	Huang, QH; Wang, ZJ; Wang, CX; Wang, SR; Jin, XC
刊名	CHEMICAL SPECIATION AND BIOAVAILABILITY
	2005
卷号	17 期号:2 页码:55-61
关键词	phosphorus speciation sediment/water interface mobilization risk assessment
英文摘要	Phosphorus released from the sediment may render lakes eutrophic under appropriate pH and redox conditions. Phosphorus speciation in lake sediments was investigated by a Standard Measurements and Testing (SMT) protocol in three shallow lakes: Taihu Lake, Chaohu Lake and Longganhu Lake in the middle and lower reaches of the Yangtze River in China. Twelve lake sediment samples with different ratios of iron-bound phosphorus (Fe-P) content to calcium-bound phosphorus (Ca-P) content were collected and exposed to various pH conditions. These sediment samples showed different patterns of P release responding to pH variations under an oxic condition. The sediments with Fe-P/Ca-P ratios less than 0.5 released more phosphorus under acidic conditions, while the sediments of higher Fe-P/Ca-P ratios released more phosphorus under alkaline conditions. The various patterns of phosphorus release from these lake sediments are dependent on the concentrations of the reactive AI and Fe forms and organic matter, which mainly contribute to the different Fe-P/Ca-P ratios. Therefore, a ratio of Fe-P content to Ca-P content in the sediment might be regarded as a simple index for the risk assessment of acidity-related or alkalinity-related release of phosphorus.
学科主题	Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Toxicology
研究领域[WOS]	Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Toxicology
WOS记录号	WOS:000231256600004
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23302]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Huang, QH,Wang, ZJ,Wang, CX,et al. Phosphorus release in response to pH variation in the lake sediments with different ratios of iron-bound P to calcium-bound P[J]. CHEMICAL SPECIATION AND BIOAVAILABILITY,2005,17(2):55-61.
APA	Huang, QH,Wang, ZJ,Wang, CX,Wang, SR,&Jin, XC.(2005).Phosphorus release in response to pH variation in the lake sediments with different ratios of iron-bound P to calcium-bound P.CHEMICAL SPECIATION AND BIOAVAILABILITY,17(2),55-61.
MLA	Huang, QH,et al."Phosphorus release in response to pH variation in the lake sediments with different ratios of iron-bound P to calcium-bound P".CHEMICAL SPECIATION AND BIOAVAILABILITY 17.2(2005):55-61.