| 半水磷石膏地下充填材料的磷和氟浸出特性及地球化学模拟 |
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| 引用本文： | 朱雪涛,杜兵,阿曼角,康媞,陈登美,石建华,刘建国.半水磷石膏地下充填材料的磷和氟浸出特性及地球化学模拟[J].中国环境科学,2022,42(2):680-687. |
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| 作者姓名： | 朱雪涛 杜兵 阿曼角 康媞 陈登美 石建华 刘建国 |
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| 作者单位： | 1. 清华大学环境学院, 北京 100084;2. 首创环境控股有限公司, 北京 100088;3. 贵州环境科学研究设计院, 贵州 贵阳 550081;4. 贵州省川恒化工有限责任公司, 贵州 福泉 550500 |
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| 基金项目： | 事业单位委托项目（20192000452） |
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| 摘 要： | 以半水磷石膏(HPG)地下充填材料为研究对象,采用pH值相关、半动态等浸出试验模拟地下水淋滤环境,评价4种HPG及胶凝充填材料(HPGB)磷和氟的浸出特性及长期释放,结合地球化学模拟探讨磷和氟浸出控制机理.结果表明,生石灰改性的HPGB体系中99.97％可溶性磷和95.92％氟化物得到较好的固定,转化为Ca3(PO4)...
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| 关 键 词： | 充填采矿 胶凝固定 淋滤 pH值相关浸出 长期稳定性 |
| 收稿时间： | 2021-06-12 |
Leaching properties of phosphorus and fluorine in hemihydrate phosphogypsum as underground filiing materials and geochemical simulation |
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| ZHU Xue-tao,DU Bing,A Man-jiao,KANG Ti,CHEN Deng-mei,SHI Jian-hua,LIU Jian-guo.Leaching properties of phosphorus and fluorine in hemihydrate phosphogypsum as underground filiing materials and geochemical simulation[J].China Environmental Science,2022,42(2):680-687. |
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| Authors: | ZHU Xue-tao DU Bing A Man-jiao KANG Ti CHEN Deng-mei SHI Jian-hua LIU Jian-guo |
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| Institution: | 1. School of Environment, Tsinghua University, Beijing 100084, China;2. Capital Environment Holdings Ltd, Beijing 100088, China;3. Guizhou Institute of Environmental Scientific Research and Design, China, Guiyang 550081;4. Guizhou Chuanheng Chemical Corporation, China, Fuquan 550500, China |
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| Abstract: | The HPG as backfill material was selected as the research subject. The leaching characteristics and long-term release of phosphorus and fluorine in four kinds of HPG and HPGB cemented paste filling materials were evaluated by pH-dependent and semi-dynamic leaching tests under simulated groundwater leaching conditions. The controlling mechanisms of phosphorus and fluorine leaching characteristics was discussed by geochemical simulation analysis. The results showed that 99.97% soluble phosphorus and 95.92% fluoride were solidified as Ca3(PO4)2 and CaF2 in HPGB which was modified by quicklime. According to the pH-dependent leaching test, the leaching concentration of total phosphorus had no significant relationship with pH under neutral and alkaline conditions. The geochemical simulation results of the semi-dynamic leaching test indicated the controlling phase of phosphorus in HPGB is fluoroapatite. The major controlling phase of fluorine leaching was fluorite and fluoroapatite, and the proportion of fluorite controlling phase decreased from 95% to 90% after long term leaching test. |
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| Keywords: | filling mining paste solidification leaching pH-dependent leaching long-term stability |
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