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| 热处理对沙漠边缘土壤腐殖酸荧光性质及其与Cu(Ⅱ)络合作用的影响 | |
| 引用本文： | 付庆龙,潘响亮,周斌.热处理对沙漠边缘土壤腐殖酸荧光性质及其与Cu(Ⅱ)络合作用的影响[J].中国沙漠,2012,32(5):1379-1383. |
| 作者姓名： | 付庆龙 潘响亮 周斌 |
| 作者单位： | 1. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011／中国科学院新疆生态与地理研究所环境污染与生态修复实验室,新疆乌鲁木齐830011／中国科学院研究生院,北京100049 2. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐830011／中国科学院新疆生态与地理研究所环境污染与生态修复实验室,新疆乌鲁木齐830011 3. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐,830011 |
| 基金项目： | 中国科学院重要方向性项目，中国科学院“百人计划”项目资助 |
| 摘 要： | 通过荧光光谱法研究了80 ℃处理下沙漠边缘土壤腐殖酸荧光性质及其与Cu(Ⅱ) 络合行为的变化。热处理导致类富里酸的发射波长发生蓝移,类富里酸和类腐殖酸的荧光强度降低,它们与Cu(Ⅱ)络合的条件稳定常数（lg Ka）降低,结合常数（lg Kb）增加,腐殖酸中参与Cu(Ⅱ) 络合的荧光基团和位点数增多。研究表明,干旱区高温环境会导致腐殖酸结构及组成发生变化,从而影响Cu(Ⅱ) 在土壤中的迁移。 |
| 关 键 词： | 腐殖酸 热处理 荧光性质 Cu(Ⅱ)络合 |
| 收稿时间： | 2012-01-30; |
Effect of Heat Treatment on Fluorescence Properties of Humic Acids of Soil beside Desert and Their Cu（ Ⅱ ） Complexing Behavior |
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| FU Qing-long,PAN Xiang-liang,ZHOU Bin.Effect of Heat Treatment on Fluorescence Properties of Humic Acids of Soil beside Desert and Their Cu（ Ⅱ ） Complexing Behavior[J].Journal of Desert Research,2012,32(5):1379-1383. | |
| Authors: | FU Qing-long PAN Xiang-liang ZHOU Bin |
| Institution: | 1(1.State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;2.Laboratory of Environmental Pollution and Bioremediation,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
| Abstract: | The changes in fluorescence properties of humic acids of soil from edge of the Taklimakan Desert under 80 ℃ heat treatment and their Cu(Ⅱ) complexing behavior were investigated through fluorescence spectroscopy.Results show that under heat treatment,a blue shift appears in the emission wavelength of fulvic-like substance;the fluorescence intensity and the Cu(Ⅱ) complexing conditional stability constants(lgKa) of fulvic-like substance and humic-like substance decrease;the Cu(Ⅱ) complexing constants(lgKb) of fulvic-like substance and humic-like substance increase;and the fluorophore and site number of humic acids involved in Cu(Ⅱ) complexing also increase.This study demonstrates that the structure and composition of humic acids might be modified by the high temperature in the arid desert zone and thus the transport behavior of Cu(Ⅱ) in soil is influenced. |
| Keywords: | humic acids heat treatment fluorescence properties Cu(Ⅱ ) complexing |
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