QQ客服 官方微博 反馈留言

	Accumulation and chemical fractionation of Cu in a paddy soil irrigated with Cu-rich wastewater
	Luo, YM; Jiang, XJ; Wu, LH; Song, J; Wu, SC; Lu, RH; Christie, P
刊名	GEODERMA
	2003-07-01
卷号	115期号:1-2页码:113-120
关键词	copper chemical speciation paddy soil pollution
ISSN号	0016-7061
DOI	10.1016/S0016-7061(03)00080-6
通讯作者	Jiang, XJ()
英文摘要	The accumulation, chemical fractionation and availability of copper (Cu) to rice (Oryza sativa) in a paddy soil previously irrigated with Cu-enriched wastewater were investigated. Chemical fractions of Cu in soil samples were partitioned using single and sequential extractions. The single extractant solutions used were water, ammonium acetate and EDTA for extraction of water-soluble, exchangeable and complexed Cu fractions in the soil. A three-step sequential extraction procedure (HAOc/NH2OH.HCl/H2O2) was also used to fractionate Cu associated with soil solids into three fractions: weak acid-soluble, reducible Fe and Mn oxides bound and oxidisable organic matter bound. The residual fraction was calculated as the difference between total (aqua regia extractable) Cu and the sum of the three sequential fractions. Copper accumulated mainly in the top layer (10 cm) of the soil profile after wastewater irrigation, increased almost seven-fold (15 8 mg kg(-1)) compared with non-irrigated soil (23 mg kg(-1)) from the same area, and was also elevated significantly in low layer (10-20 cm) below the soil surface. Concentrations of Cu in the water-soluble, exchangeable and complexed fractions increased from 0.02, 0.33 and 14.1 mg kg(-1), respectively, in unpolluted soil to 0.12, 6.30 and 98.0 mg kg(-1) in polluted soil. Irrigation also led to marked increases in the weak acid-soluble, reducible Fe and Mn oxide bound, oxidisable organic matter bound and residual fractions of Cu. In the contaminated paddy soil, the reducible Fe and Mn oxide bound fraction was the largest (36% of total Cu), followed by the oxidisable fraction, then the residual fraction, and the smallest was the acetic acid-soluble fraction. However, in the unpolluted soil, 53% of total Cu was present in the residual fraction followed by the reducible Fe and Mn oxide bound fraction (22% of total Cu). Accumulation of Cu in the bioavailable fractions resulted in a three-fold increase in Cu concentration (up to 38 mg kg(-1)) in rice plants in the heavily polluted (HP) soil compared with unpolluted soil. Plant yields decreased substantially due to Cu toxicity. Data indicate that the reducible Fe and Mn oxide bound fraction may be more important for controlling the mobility and bioavailability of Cu than the oxidisable organic matter bound fraction in paddy soils. (C) 2003 Published by Elsevier Science B.V.
收录类别	SCI
WOS关键词	EXTRACTION SCHEMES ; HEAVY-METALS ; TRACE-METALS ; HARMONIZATION ; SPECIATION
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000183271700011
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2559216
专题	南京土壤研究所
通讯作者	Jiang, XJ
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Lab Mat Cycling Pedosphere, Nanjing 210008, Peoples R China 2.Queens Univ Belfast, Dept Agr & Environm Sci, Belfast BT9 5PX, Antrim, North Ireland
推荐引用方式 GB/T 7714	Luo, YM,Jiang, XJ,Wu, LH,et al. Accumulation and chemical fractionation of Cu in a paddy soil irrigated with Cu-rich wastewater[J]. GEODERMA,2003,115(1-2):113-120.
APA	Luo, YM.,Jiang, XJ.,Wu, LH.,Song, J.,Wu, SC.,...&Christie, P.(2003).Accumulation and chemical fractionation of Cu in a paddy soil irrigated with Cu-rich wastewater.GEODERMA,115(1-2),113-120.
MLA	Luo, YM,et al."Accumulation and chemical fractionation of Cu in a paddy soil irrigated with Cu-rich wastewater".GEODERMA 115.1-2(2003):113-120.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。