| 某垃圾填埋场包气带砂土对NH4+-N的吸附研究 |
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| 引用本文： | 徐基胜,刘培斌,梁静,陈坚,付佳妮,刘菲.某垃圾填埋场包气带砂土对NH4+-N的吸附研究[J].岩石矿物学杂志,2011,30(6):1111-1117. |
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| 作者姓名： | 徐基胜 刘培斌 梁静 陈坚 付佳妮 刘菲 |
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| 作者单位： | 1. 中国地质大学水资源与环境学院,北京市重点实验室,北京100083
2. 北京市水利规划设计研究院,北京,100044 |
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| 基金项目： | 水体污染控制与治理科技重大专项，水体污染控制与治理科技重大专项，典型污染区污染防控与修复技术研究与示范 |
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| 摘 要： | 对某垃圾填埋场包气带砂土吸附氨氮的机理进行了研究,通过吸附等温实验主要探讨了其吸附过程、不同粒级土的吸附贡献和吸附氨氮的3种形态。结果表明:样品土对氨氮的等温吸附线符合Langmuir模式,原土的计算最大吸附量为435 mg/kg;中砂、细砂和实验原土的吸附能力大小顺序为:原土>细砂>中砂;在样品土中,粉质粘土随着初始铵溶液浓度的升高吸附绝对量和吸附贡献率都在上升,由50 mg/L时的43%贡献率上升到400 mg/L时70%的贡献率,成为原土吸附氨氮的主要贡献者;随着初始铵溶液浓度的升高,水溶态铵、可交换态铵和固定态铵的绝对量都大致呈上升趋势,它们的最大吸附量分别为112.3、97.5和214.0 mg/kg;铵溶液中的铵离子进入粘土中的大致顺序为:颗粒表面的扩散层(主要为水溶态铵)→吸附层(主要为可交换态铵)→矿物晶格内部和晶层空间(主要为固定态铵)。
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| 关 键 词： | 氨氮 吸附 浸提 水溶态铵 可交换态铵 固定态铵 |
| 收稿时间： | 2010/12/9 0:00:00 |
| 修稿时间： | 2011/4/16 0:00:00 |
The mechanism of adsorption of ammonium on the sandy soils in the vadose zone of a landfill |
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| XU Ji-sheng,LIU Pei-bin,LIANG Jing,CHEN Jian,FU Jia-ni and LIU Fei.The mechanism of adsorption of ammonium on the sandy soils in the vadose zone of a landfill[J].Acta Petrologica Et Mineralogica,2011,30(6):1111-1117. |
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| Authors: | XU Ji-sheng LIU Pei-bin LIANG Jing CHEN Jian FU Jia-ni and LIU Fei |
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| Institution: | XU Ji-sheng1,LIU Pei-bin2,LIANG Jing1,CHEN Jian1,FU Jia-ni1 and LIU Fei1(1.Beijing Key Laboratory of Water Resources and Environmental Engineering,China University of Geosciences,Beijing 10083,China,2.Beijing Institute of Water,Beijing 100044,China) |
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| Abstract: | The ammonium in the vadose zone has remarkable effect on the degree of groundwater contamination,especially in the vadose zone of a landfill with high concentration of ammonium.Thus laboratory experiments were conducted with the tested soils in the vadose zone of a landfill.This paper deals with the mechanism of ammonium adsorption,with emphasis placed on the process of the adsorption,the contribution of different fractions of soils to the adsorption and the forms of the ammonium in soils.Among these factor... |
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| Keywords: | ammonium adsorption extraction soluble ammonium exchangeable ammonium fixed ammonium |
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