| 水钠锰矿氧化硫化物的过程与动力学研究 |
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| 引用本文： | 李倩,俞颖,刘凡,冯雄汉,谭文峰,邱国红.水钠锰矿氧化硫化物的过程与动力学研究[J].岩石矿物学杂志,2011,30(6):1007-1013. |
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| 作者姓名： | 李倩 俞颖 刘凡 冯雄汉 谭文峰 邱国红 |
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| 作者单位： | 华中农业大学资源与环境学院,湖北武汉,430070 |
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| 基金项目： | 教育部博士点基金新教师项目，国家自然科学基金 |
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| 摘 要： | 水钠锰矿是表生环境中常见的氧化锰矿物之一,影响土壤溶液中硫化物的迁移、转化和归趋。本文考察了酸性水钠锰矿氧化硫化钠溶液的反应过程,采用分光光度法、离子色谱法分析S2-及其氧化产物的浓度和变化趋势,用XRD、SEM表征酸性水钠锰矿粉末反应前后的晶体结构和微观形貌,探讨了温度、pH值、矿物用量对S2-氧化速率的影响。结果表明,S2-的氧化产物主要为单质S,其氧化速率符合准一级动力学规律,且氧化速率随着温度升高、pH值降低和矿物用量增加而增大;酸性水钠锰矿首先被还原生成Mn(OH)2,Mn(OH)2在空气中与O2作用转化成Mn3O4,Mn3O4可进一步转化生成MnOOH。
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| 关 键 词： | 水钠锰矿 硫化物 氧化还原 动力学 土壤化学 |
| 收稿时间： | 2010/8/16 0:00:00 |
| 修稿时间： | 2010/11/7 0:00:00 |
An investigation of the oxidation process and kinetics of sulfides by birnessite |
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| LI Qian,YU Ying,LIU Fan,FENG Xiong-han,TAN Wen-feng and QIU Guo-hong.An investigation of the oxidation process and kinetics of sulfides by birnessite[J].Acta Petrologica Et Mineralogica,2011,30(6):1007-1013. |
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| Authors: | LI Qian YU Ying LIU Fan FENG Xiong-han TAN Wen-feng and QIU Guo-hong |
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| Institution: | LI Qian,YU Ying,LIU Fan,FENG Xiong-han,TAN Wen-feng and QIU Guo-hong(College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China) |
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| Abstract: | As one of the common manganese oxide minerals in the supergene environment,birnessite affects the migration,transformation and environmental fate of sulfur in soil.In this study,the oxidation process of sodium sulfide by birnessite was investigated.The kinds and concentrations of oxidation products of sulfides in solution were determined by spectrophotometry and ion chromatography,and the crystal structures and micro-morphologies of solid oxidation products of sulfides were analyzed by XRD and SEM.The influ... |
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| Keywords: | birnessite sulfide redox kinetics soil chemistry |
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