首页|Experimental constraints on the formation of oxychlorine species by UV irradiation and mechanical pulverization on the lunar surface

Experimental constraints on the formation of oxychlorine species by UV irradiation and mechanical pulverization on the lunar surface

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Experimental constraints on the formation of oxychlorine species by UV irradiation and mechanical pulverization on the lunar surface
Perchlorate and chlorate are present in various extraterrestrial celestial bodies throughout the solar system,such as Mars,the moon,and asteroids.To date,the origin mechanisms of perchlorate and chlorate on the Martian sur-face have been well-established;however,relatively little attention has been cast to airless bodies.Here,we experi-mentally investigated the potential oxidation mechanisms of chloride to chlorate and perchlorate,such as ultraviolet irradiation under H2O-and O2-free conditions and mechan-ical pulverization processes.Individual minerals,olivine,pyroxene,ilmenite,magnetite,TiO2 and anhydrous ferric sulfate,and lunar regolith simulants(low Ti,CLRS-1;high-Ti,CLRS-2)and their metallic iron(Fe0)bearing counter-parts were examined.We found that pulverization of dry matrix material-halite mixtures,even in the presence of O2,does not necessarily lead to perchlorate and chlorate forma-tion without involving water.Under photocatalytic and H2O-and O2-free conditions,olivine and pyroxene can produce oxychlorine(ClOx-)species,although the yields were orders of magnitude lower than those under Martian-relevant con-ditions.Nanophase-Fe0 particles in the lunar regolith and the common photocatalyst TiO2 can facilitate the C1Ox-forma-tion,but their yields were lower than those with olivine.The oxides ilmenite and magnetite did not efficiently contribute to ClOx-production.Our results highlight the critical role of H2O in the oxidation chloride to chlorate and perchlorate,and provide essential insights into the environmental influ-ence on the formation of oxychlorine species on different celestial bodies.

PerchlorateChlorateLunar regolithMetallic FeAirless bodies

Jiamei Li、Yu-Yan Sara Zhao、He Cui、Shuai-Yi Qu、Yanhua Peng、Yuhong Yang、Xiongyao Li

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Research Center for Planetary Science,College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,China

Center for Excellence in Comparative Planetology,Chinese Academy of Sciences,Hefei 230026,China

College of Life Sciences,Wuchang University of Technology,Wuhan 430204,China

Technical Center of Qingdao Customs,Qingdao 266114,China

Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China

University of Chinese Academy of Sciences,Beijing 100049,China

Nanning College of Technology,Guilin 541006,China

Center for Lunar and Planetary Sciences,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China

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Perchlorate Chlorate Lunar regolith Metallic Fe Airless bodies

2024

10.1007/s11631-024-00707-0

地球化学学报(英文版)
中国科学院地球化学研究所

地球化学学报(英文版)

EI
影响因子：0.33
ISSN：2096-0956
年,卷(期)：2024.43(4)