| 地下水中Am的形态分布及影响因素 |
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| 引用本文： | 黄支刚,王永利,陆春海,朵天惠,陈鹏飞.地下水中Am的形态分布及影响因素[J].环境化学,2012,31(2):168-174. |
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| 作者姓名： | 黄支刚 王永利 陆春海 朵天惠 陈鹏飞 |
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| 作者单位： | 1. 成都理工大学地球化学系,成都,610059
2. 四川华源矿业勘查开发有限责任公司,成都,610091 |
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| 摘 要： | 利用日本原子力学研究所于2010年9月提供的最新数据库,以北山的地下水为例,使用地球化学软件PHREEQC进行模拟.结果表明,结晶固体AmCO3OH.0.5H2O的溶解度很低,北山地下水中AmCO3＋占主导优势,其次为AmSiO（OH）23＋;Am在pH=4.5—5.8的条件下以Am3＋和AmSO4＋形态为主,在pH=5.8—8.3的条件下以AmCO3＋和AmSiO（OH）23＋为主,在pH=8.3—9.5的条件下以Am（CO3）2-为主;pH对Am存在形态影响很大,而pE对Am存在形态影响较小.CO2分压越大,水溶液中CO23-的摩尔浓度越低,使得Am（CO3）2-摩尔浓度降低,AmCO3＋与Am（CO3）2-摩尔浓度之和也降低,而Am3＋、AmHCO23＋和AmSO4＋的摩尔浓度升高.
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| 关 键 词： | Am 溶解度 形态分布 PHREEQC |
Species distribution and influence factors for americium in groundwater |
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| HUANG Zhigang,WANG Yongli,LU Chunhai,DUO Tianhui,CHEN Pengfei.Species distribution and influence factors for americium in groundwater[J].Environmental Chemistry,2012,31(2):168-174. |
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| Authors: | HUANG Zhigang WANG Yongli LU Chunhai DUO Tianhui CHEN Pengfei |
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| Institution: | 1.Chengdu University of Technology,Dept.of Geochemistry,Chengdu,610059,China; 2.Sichuan Huayuan Mining Prospecting Development CO.,LTD,Chengdu,610091,China) |
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| Abstract: | PHREEQC is a well known geochemical software.In this paper,PHREEQC with a database was employed to study Am in groundwater in Beishan.Database was published by Japan Atomic Energy Agency in September,2010.The results show that the solubility of AmCO3OH · 0.5H2O is low.The dominant chemical species of Am is AmCO+3,AmSiO(OH)2+3 being the second.Am3+ and AmSO+4 are the dominant chemical sepcies at pH 4.5—5.8.AmCO+3 and AmSiO(OH)2+3 are the dominant chemical species at pH 5.5—8.3.Am(CO3)-2 is the dominant chemical form at pH 8.3—9.5.Meanwhile,the results show that pH had stronger effect on the chemical speciation of Am than pE.With increasing CO2 partial pressure,concentrations of CO2-3,Am(CO3)-2,AmCO+3 and Am(CO3)-2 decreased but concentration of Am3+,AmHCO2+3 and AmSO+4 increased. |
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| Keywords: | americium solubility distribution of species PHREEQC |
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