| 反硝化增强去除乙醇对多孔介质渗透性的影响 |
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| 引用本文： | 蒋亚萍,陈余道,张燕,黄月群.反硝化增强去除乙醇对多孔介质渗透性的影响[J].高校地质学报,2010,16(1):32-38. |
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| 作者姓名： | 蒋亚萍 陈余道 张燕 黄月群 |
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| 作者单位： | 1. 广西环境工程与保护评价重点实验室，桂林理工大学，桂林 541004；2. 南京大学 地球科学与工程学院，南京 210093 |
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| 基金项目： | 国家自然科学基金(40672200);;教育部留学回国人员科研启动基金联合资助 |
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| 摘 要： | 随着乙醇混合汽油的不断推广应用,乙醇将成为地下水中与苯、甲苯、乙苯及二甲苯的同分异构体(BTEX)共存的一种新型污染物。通过4个含水砂柱实验,研究了乙醇存在及其强化去除对含水介质渗透性能的影响。结果表明:在有限溶解氧与反硝化增强修复条件下,乙醇去除率达92%以上;生物过程对介质渗透能力影响程度随乙醇初始浓度、消耗速率与补充频率而变化:乙醇初始浓度接近1000mg/L和3000mg/L时,乙醇消耗快,补充频率高,渗透系数下降总体上有连续性,最大下降幅度达一个数量级(×10-1cm/s);乙醇初始浓度达到5000mg/L时,渗透性下降显著,可下降两个数量级,但乙酸的积累可影响生物活性,并使得渗透性变化出现反复;当不含乙醇时,汽油溶解组分对介质渗透性能的影响相对不明显。
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| 关 键 词： | 乙醇混合汽油 含水介质 反硝化 增强修复 渗透性 影响 |
| 修稿时间： | 2010-03-20 |
Effects of Ethanol Nitrate-Enhanced Bioremediation on Permeability of Porous Media |
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| JIANG Ya-ping,CHEN Yu-dao,ZHANG Yan,HUANG Yue-qun.Effects of Ethanol Nitrate-Enhanced Bioremediation on Permeability of Porous Media[J].Geological Journal of China Universities,2010,16(1):32-38. |
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| Authors: | JIANG Ya-ping CHEN Yu-dao ZHANG Yan HUANG Yue-qun |
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| Institution: | 1. Guangxi Key Lab of Environmental Engineering, Protection and Assessment, Guilin University of Technology, Guilin 541004, China;2. School of Earth Science and Engineering, Nanjing University, Nanjing 210093, China |
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| Abstract: | Increasing use of ethanol blended gasoline will make ethanol a new contaminant along with benzene,toluene, ethylbenzene and xylene isomers(collectively denoted as BTEX)in groundwater. This study focuses on the effects of ethanol nitrate-enhanced bioremediation on permeability of porous media via four sand column experiments. Results showed that the removal rates of ethanol were greater than 92 % under limited dissolved oxygen and amended nitrate conditions. Effects of bioprocesses on permeability could vary... |
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| Keywords: | ethanol blended gasoline porous media denitrification enhanced bioremediation permeability effect |
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