Chemical forms of cadmium in a calcareous soil treated with different levels of phosphorus-containing acidifying agents

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Chemical forms of cadmium in a calcareous soil treated with different levels of phosphorus-containing acidifying agents
	Wu, Chunfa 1,2; Yan, Shihong 3; Zhang, Haibo4 ; Luo, Yongming4
刊名	SOIL RESEARCH
	2015
卷号	53 期号:1 页码:105-111
关键词	chemical transformation water-soluble phosphorus
ISSN号	1838-675X
通讯作者	Wu, CF (reprint author), Nanjing Univ Informat Sci & Technol, Dept Agr Resources & Environm, 219 Ningliu Rd, Nanjing 210044, Jiangsu, Peoples R China. wchf1680@sina.com
产权排序	[Wu, Chunfa] Nanjing Univ Informat Sci & Technol, Dept Agr Resources & Environm, Nanjing 210044, Jiangsu, Peoples R China; [Wu, Chunfa] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; [Yan, Shihong] Anhui Univ Sci & Technol, Sch Earth & Environm, Huainan 232001, Peoples R China; [Zhang, Haibo; Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
中文摘要	Calcareous soils with high background cadmium (Cd) levels are widely distributed in south-west China and soil acidity is a major environmental problem. However, little effort has been made to study the changes in chemical speciation as affected by soil acidification other than by acidic rain. In the present study, we investigated the impact of mono-ammonium phosphate (MAP) and phosphoric acid on soil pH and chemical transformation of Cd in calcareous soils. Calcareous soils collected from south-west China were treated with three concentrations (0.1, 0.2 and 0.4molkg(-1) soil) of MAP and phosphoric acid, and without the addition of acidifying agent, before being incubated at 25 +/- 2 degrees C near field capacity moisture content for 60 days. The chemical forms of Cd in the soils were determined by the Tessier sequential extraction scheme. The concentration of Cd in the form bound to iron and manganese oxides (CdFeOx+MnOy) decreased significantly with increasing levels of the two acidifying agents, but the concentration of exchangeable Cd (Cd-Ex) exhibited a significant increase, indicating that the two acidifying agents can effectively promote the transformation of CdFeOx+MnOy to Cd-Ex. MAP may promote the same amount of CdFeOx+MnOy to Cd-Ex as phosphoric acid at the same rate of addition, but the soil pH clearly differed, implying that an increase in water-soluble P with addition of acidifying agent may be one major factor affecting the chemical transformation of Cd. MAP and phosphoric acid should be used carefully as sources of water-soluble phosphorus for calcareous soils with high background concentrations of Cd.
英文摘要	Calcareous soils with high background cadmium (Cd) levels are widely distributed in south-west China and soil acidity is a major environmental problem. However, little effort has been made to study the changes in chemical speciation as affected by soil acidification other than by acidic rain. In the present study, we investigated the impact of mono-ammonium phosphate (MAP) and phosphoric acid on soil pH and chemical transformation of Cd in calcareous soils. Calcareous soils collected from south-west China were treated with three concentrations (0.1, 0.2 and 0.4molkg(-1) soil) of MAP and phosphoric acid, and without the addition of acidifying agent, before being incubated at 25 +/- 2 degrees C near field capacity moisture content for 60 days. The chemical forms of Cd in the soils were determined by the Tessier sequential extraction scheme. The concentration of Cd in the form bound to iron and manganese oxides (CdFeOx+MnOy) decreased significantly with increasing levels of the two acidifying agents, but the concentration of exchangeable Cd (Cd-Ex) exhibited a significant increase, indicating that the two acidifying agents can effectively promote the transformation of CdFeOx+MnOy to Cd-Ex. MAP may promote the same amount of CdFeOx+MnOy to Cd-Ex as phosphoric acid at the same rate of addition, but the soil pH clearly differed, implying that an increase in water-soluble P with addition of acidifying agent may be one major factor affecting the chemical transformation of Cd. MAP and phosphoric acid should be used carefully as sources of water-soluble phosphorus for calcareous soils with high background concentrations of Cd.
学科主题	Soil Science
研究领域[WOS]	Agriculture
关键词[WOS]	SEQUENTIAL EXTRACTION PROCEDURE ; SEWAGE-SLUDGE ; HEAVY-METALS ; PHOSPHATE FERTILIZERS ; AUSTRALIAN SOILS ; INCUBATION-TIME ; ORGANIC-MATTER ; ACIDIC SOILS ; PLANT UPTAKE ; ZINC
收录类别	SCI
语种	英语
WOS记录号	WOS:000349618700010
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/8673]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Nanjing Univ Informat Sci & Technol, Dept Agr Resources & Environm, Nanjing 210044, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 3.Anhui Univ Sci & Technol, Sch Earth & Environm, Huainan 232001, Peoples R China 4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Wu, Chunfa,Yan, Shihong,Zhang, Haibo,et al. Chemical forms of cadmium in a calcareous soil treated with different levels of phosphorus-containing acidifying agents[J]. SOIL RESEARCH,2015,53(1):105-111.
APA	Wu, Chunfa,Yan, Shihong,Zhang, Haibo,&Luo, Yongming.(2015).Chemical forms of cadmium in a calcareous soil treated with different levels of phosphorus-containing acidifying agents.SOIL RESEARCH,53(1),105-111.
MLA	Wu, Chunfa,et al."Chemical forms of cadmium in a calcareous soil treated with different levels of phosphorus-containing acidifying agents".SOIL RESEARCH 53.1(2015):105-111.