| DOI: | 10.1002/2015GL064290
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| 论文题名: | The origins of perchlorate in the Martian soil |
| 作者: | Carrier B.L.; Kounaves S.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9504
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| EISSN: | 1944-9235
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| 出版年: | 2015
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| 卷: | 42, 期:10 | | 起始页码: | 3739
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| 结束页码: | 3745
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| 语种: | 英语
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| 英文关键词: | Mars
; perchlorate
; regolith
; soil
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| Scopus关键词: | Chlorine
; Chlorine compounds
; Inorganic compounds
; Ion chromatography
; Sodium chloride
; Aqueous condition
; Mars
; Martian soils
; Metal oxides
; Organics
; Perchlorate
; Potential effects
; Regolith
; Soils
; air sampling
; ion chromatography
; irradiation
; Mars
; Martian atmosphere
; perchlorate
; photochemistry
; radical
; regolith
|
| 英文摘要: | Perchlorate (ClO4-) has been detected on Mars, but its production and distribution are unclear. Mechanisms requiring atmospheric chlorine are insufficient for measured concentrations. We conducted studies under Mars conditions using halite (NaCl) alone, soil simulants consisting of silica (SiO2), Fe2O3, Al2O3, and TiO2. After 170 h irradiation, samples analyzed by ion chromatography (IC) showed ClO4- and ClO3- present in all samples. When SiO2 was added, yield increased from 2 to 42 nmol and 0.4 to 2.6 nmol, respectively. We attribute this to SiO2 and metal oxides acting as photocatalysts, generating O2- radicals from O2 which react with chloride. Results show ClO4- and ClO3- can be produced photochemically on Cl minerals without atmospheric chlorine or aqueous conditions, and explain high concentration of ClO4- and ClO4-/Cl- ratios detected by Phoenix. They provide evidence that its distribution on Mars is dictated by distribution of chlorine and provide insight into the oxidizing nature of the soil and its potential effects on organics. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931569474&doi=10.1002%2f2015GL064290&partnerID=40&md5=c19048a26502e178ece9bdb53bb352b9
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9119
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Chemistry, Tufts University, Medford, MA, United States
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| Recommended Citation: | |
Carrier B.L.,Kounaves S.P.. The origins of perchlorate in the Martian soil[J]. Geophysical Research Letters,2015-01-01,42(10).
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