Solubility of trace metals in two contaminated paddy soils exposed to alternating flooding and drainage

doi:10.1016/j.geoderma.2015.07.011

	Solubility of trace metals in two contaminated paddy soils exposed to alternating flooding and drainage
	Pan, Yunyu 1,2; Bonten, Luc T. C.3; Koopmans, Gerwin F.2; Song, Jing 1; Luo, Yongming4 ; Temminghoff, Erwin J. M.2; Comans, Rob N. J.2
发表期刊	GEODERMA
ISSN	0016-7061
	2016
卷号	261 页码:59-69
关键词	Redox Potential Trace Metal Concentration Soil Solution Paddy Soil Multi-surface Models
DOI	10.1016/j.geoderma.2015.07.011
英文摘要	Uptake of trace metals by crops is determined by the solubility of trace metals. In paddy soils, flooding and drainage influence redox chemistry and consequently trace metal solubility and thus uptake by rice plants. Current knowledge on how the dynamics in redox chemistry affect the solubility of trace metals in contaminated paddy soils is still limited. The objectives of our study were to investigate (i) the effects of flooding and drainage on trace metal solubility in paddy soils and (ii) to what extent a multi-surface modeling approach can predict trace metal solubility under changing redox conditions. We performed a column experiment with two contaminated paddy soils with similar soil properties but contrasting pH. During two successive flooding and drainage cycles, dynamics in Eh, pH and dissolved organic matter concentrations greatly affected trace metal solubility for both soils. Multi-surface model predictions indicate that under aerobic conditions, the higher pH of the alkaline soil leads to a stronger complexation of trace metals by reactive surfaces of the soil and, consequently, to lower dissolved concentrations than in the acidic soil. Under anaerobic conditions, predictions shows that sulfide precipitates control trace metal solubility in both soils, but still the higher pH of the alkaline soil leads to lower trace metal concentrations in soil solution at equilibrium. Furthermore, model calculations showed that stoichiometry and solubility of copper sulfide minerals can substantially affect solubility of other trace metals especially when trace element concentrations exceed soil sulfate concentrations. This stoichiometry and solubility should be considered when predicting the solubility of trace metals under anaerobic conditions. (C) 2015 Elsevier B.V. All rights reserved.
文章类型	Article
收录类别	SCI
语种	英语
关键词[WOS]	DISSOLVED ORGANIC-MATTER ; NICA-DONNAN MODEL ; X-RAY-ABSORPTION ; ION-BINDING ; RELEASE KINETICS ; HYDROUS OXIDES ; CADMIUM ; RICE ; SORPTION ; SPECIATION
研究领域[WOS]	Agriculture
WOS记录号	WOS:000362130900006
引用统计	被引频次：71[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/9753
专题	中国科学院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Wageningen Univ, Dept Soil Qual, NL-6700 AA Wageningen, Netherlands 3.Alterra Wageningen UR, NL-6700 AA Wageningen, Netherlands 4.Chinese Acad Sci, Yantai Inst Costal Zone Res, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Pan, Yunyu,Bonten, Luc T. C.,Koopmans, Gerwin F.,et al. Solubility of trace metals in two contaminated paddy soils exposed to alternating flooding and drainage[J]. GEODERMA,2016,261:59-69.
APA	Pan, Yunyu.,Bonten, Luc T. C..,Koopmans, Gerwin F..,Song, Jing.,Luo, Yongming.,...&Comans, Rob N. J..(2016).Solubility of trace metals in two contaminated paddy soils exposed to alternating flooding and drainage.GEODERMA,261,59-69.
MLA	Pan, Yunyu,et al."Solubility of trace metals in two contaminated paddy soils exposed to alternating flooding and drainage".GEODERMA 261(2016):59-69.