Source Identification of Sulfur in Uncultivated Surface Soils from Four Chinese Provinces

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	Source Identification of Sulfur in Uncultivated Surface Soils from Four Chinese Provinces
	Hua-Yun XIAO; Nan LI; Cong-Qiang LIU
刊名	Pedosphere
	2015
卷号	25 期号:1 页码:140-149
英文摘要	The analysis of stable isotopes of sulfur (delta S-34) is a useful tool for identifying sources of sulfur in soils. Concentrations and sulfur (S) isotopes of water-soluble sulfate (WSS), adsorbed sulfate (AS), residual sulfur (RS), and total sulfur (TS) in uncultivated surface soils of four Chinese provinces were systematically analyzed for identifying sources of S in the soils. Green and healthy mosses (Haplocladium microphyllum) were sampled as bioindicators. The mean WSS concentration (27.8 +/- 23.4 mg kg(-1)) in the surface soils was lower than those of AS (101.4 +/- 57.0 mg kg(-1)) and RS (381.5 +/- 256.7 mg kg(-1)). The mean delta S-34 values of WSS and AS were very similar (about 2.0 parts per thousand), lower than those of RS (8.0 parts per thousand) and TS (6.1 parts per thousand). A significant linear correlation was found between the delta S-34 values of AS and WWS (y = 1.0002x - 0.0557, P < 0.0001), indicating that sulfate adsorption in the soils did not markedly fractionate S. All S species in the soils of Guizhou Province were characterized by the lowest delta S-34 values, consistent with the most S-34-depleted rainwater sulfate reported at Guiyang of Guizhou Province. The delta S-34 values of sulfate in mosses and rainwater previously reported were significantly linearly correlated with those of both WWS and AS in surface soils, suggesting that atmospheric S input was an important source for soil WSS and AS. However, there were no significant correlations between isotopic composition of rainwater sulfate and RS or TS. The slopes of all these significant linear correlations (soil/rainwater or soil/moss isotopic ratio) were 0.4-0.6, indicating that inorganic sulfate in the surface soils should be a result of mixing of deposited atmospheric sulfate with a more 34S-depleted sulfate component possibly from mineralization of RS.
学科主题	环境地球化学
语种	英语
公开日期	2017-05-10
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/5968]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Hua-Yun XIAO,Nan LI,Cong-Qiang LIU. Source Identification of Sulfur in Uncultivated Surface Soils from Four Chinese Provinces[J]. Pedosphere,2015,25(1):140-149.
APA	Hua-Yun XIAO,Nan LI,&Cong-Qiang LIU.(2015).Source Identification of Sulfur in Uncultivated Surface Soils from Four Chinese Provinces.Pedosphere,25(1),140-149.
MLA	Hua-Yun XIAO,et al."Source Identification of Sulfur in Uncultivated Surface Soils from Four Chinese Provinces".Pedosphere 25.1(2015):140-149.