干旱区生态环境知识资源中心(Arid): Sources and sinks of perchlorate in soil in coastal ice-free areas of Antarctica

Arid

DOI	10.1016/j.catena.2021.105706
	Sources and sinks of perchlorate in soil in coastal ice-free areas of Antarctica
	Jiang, Su; Shi, Guitao; Cole-Dai, Jihong; Zhao, Qian; Li, Yangjie; Wang, Dongqi; Sun, Bo
通讯作者	Shi, GT (corresponding author), East China Normal Univ, Sch Geog Sci, Key Lab Geog Informat Sci, 500 Dongchuan Rd, Shanghai 200241, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	207
英文摘要	Perchlorate (ClO4-), a persistent inorganic compound, has harmful effects on human health. Natural ClO4- is formed in the atmosphere and enters into the surface environment through deposition. However, the knowledge on the occurrence, spatial variability and sinks of natural ClO4- in different environments remains limited, especially in the polar regions. Here, we investigate the sources and sinks of ClO4- in soil collected in three ice-free areas in coastal Antarctica, where the research stations and wildlife colonies are mainly distributed. No statistically significant difference in ClO4- concentrations between sites near and away from the stations suggests that local human presence is not a significant source of ClO4- in soil. Concentrations of ClO4- in soil from wildlife colonies are not significantly higher than those from sites with no intense wildlife activities, indicating that wildlife activities have no significant influences on ClO4- in soil. Thus, atmospherically formed ClO4- is the main source for soil in Antarctica. In general, ClO4- concentrations (0.1-5.1 mu g kg(-1)) in soil in this study are much lower than those in the arid environments and comparable to those in the unsaturated zones. Leaching by snow meltwater may be the main sink for ClO4- in soil, and deeper depths for aqueous migration may contribute to the lower ClO4- concentrations in Antarctic surface soil compared to the values in the arid areas with low precipitation amount. Due to the biological origin of NO3-, no correlation between NO3- and ClO4- in soil is observed in this study, different from the observations in arid areas. In addition, no significant correlation is observed between organic matter contents and ClO4- concentrations in soil, suggesting that biological reduction is not an important sink for ClO4- in Antarctic soil.
英文关键词	Perchlorate Atmospheric origin Leaching Soil Antarctica
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000703268900119
WOS关键词	NATURAL PERCHLORATE ; ISOTOPIC COMPOSITION ; ION CHROMATOGRAPHY ; EAST ANTARCTICA ; NITRATE ; OXYGEN ; REDUCTION ; SNOW ; BIODEGRADATION ; (PER)CHLORATE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362808
作者单位	[Jiang, Su; Shi, Guitao; Zhao, Qian; Sun, Bo] Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China; [Shi, Guitao; Zhao, Qian; Wang, Dongqi] East China Normal Univ, Sch Geog Sci, Key Lab Geog Informat Sci, 500 Dongchuan Rd, Shanghai 200241, Peoples R China; [Shi, Guitao; Zhao, Qian; Wang, Dongqi] East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China; [Cole-Dai, Jihong] South Dakota State Univ, Avera Hlth & Sci Ctr, Dept Chem & Biochem, Box 2202, Brookings, SD 57007 USA; [Li, Yangjie] Minist Nat Resources, Key Lab Marine Ecosyst Dynam, Inst Oceanog 2, Hangzhou 310012, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Su,Shi, Guitao,Cole-Dai, Jihong,et al. Sources and sinks of perchlorate in soil in coastal ice-free areas of Antarctica[J],2021,207.
APA	Jiang, Su.,Shi, Guitao.,Cole-Dai, Jihong.,Zhao, Qian.,Li, Yangjie.,...&Sun, Bo.(2021).Sources and sinks of perchlorate in soil in coastal ice-free areas of Antarctica.CATENA,207.
MLA	Jiang, Su,et al."Sources and sinks of perchlorate in soil in coastal ice-free areas of Antarctica".CATENA 207(2021).