| 葡萄糖对水-沉积物微界面NH4^＋和O2流速影响的微电极原位监测 |
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| 引用本文： | 赵轩,丁爱中,豆俊峰,程莉蓉.葡萄糖对水-沉积物微界面NH4^＋和O2流速影响的微电极原位监测[J].北京师范大学学报(自然科学版),2012,48(4):432-435. |
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| 作者姓名： | 赵轩 丁爱中 豆俊峰 程莉蓉 |
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| 作者单位： | 北京师范大学水科学研究院,地下水污染控制与修复教育部工程研究中心,北京100875;北京师范大学水科学研究院,地下水污染控制与修复教育部工程研究中心,北京100875;北京师范大学水科学研究院,地下水污染控制与修复教育部工程研究中心,北京100875;北京师范大学水科学研究院,地下水污染控制与修复教育部工程研究中心,北京100875 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 通过模拟实验,用微电极技术原位监测有机负荷(葡萄糖)对水-沉积物微界面NH4+和O2流速的变化,结果表明:1)有机负荷沉降提高了水-沉积物界面好氧微生物的活性,导致界面耗氧速率加快;2)有机负荷沉降,引起水-沉积物界面上NH4+流先由向水体释放转为向沉积物内流,后慢慢恢复到初始的释氮状态.
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| 关 键 词： | 河流 水-沉积物微界面 微电极 氨氮 溶解氧 |
IN SITU MONITORING OF NH4＋ AND O2 FLUX IN WATER-SEDIMENT MICRO-INTERFACE RESPONSE TO GLUCOSE LOADING |
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| ZHAO Xuan,DING Aizhong,DOU Junfeng,CHENG Lirong.IN SITU MONITORING OF NH4＋ AND O2 FLUX IN WATER-SEDIMENT MICRO-INTERFACE RESPONSE TO GLUCOSE LOADING[J].Journal of Beijing Normal University(Natural Science),2012,48(4):432-435. |
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| Authors: | ZHAO Xuan DING Aizhong DOU Junfeng CHENG Lirong |
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| Institution: | (College of Water Sciences,Beijing Normal University,Engineering Research Center of Groundwater Pollution Control and Remediation of Ministry of Education,100875,Beijing,China) |
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| Abstract: | Biogeochemical processes in water-sediment micro-interface play a significant role in transportation and transformation of pollutant and overlying water.Thus in situ monitoring of nitrogen fate in water-sediment micro-interface would be of great significance to river environmental protection and ecological re-habilitation.Microelectrode was used to monitor in situ and in real time O2 and NH+4 fluxes across water-sediment interface.It was found that organic loading(glucose) in water-sediment system with high DO(dissolved oxygen) in water tended to improve activity of aerobic microorganism and oxygen consuming rate.Sediment kept releasing NH+4 into overlying water with unstable rates,organic loading also caused NH+4 flux reversal in a short term. |
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| Keywords: | river water-sediment micro-interface microelectrode ammonia nitrogen DO |
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