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Effects of water chemistry and concentrations of dissolved organic matter on its fluorescence characteristics and molecular conformation

ISSN号：2096-0956
期刊名称：《中国地球化学学报：英文版》
时间：0
分类：X799.303[环境科学与工程—环境工程] X131[环境科学与工程—环境科学]
作者机构：[1]The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China, [2]The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China, [3]Chinese Research Academy of Environmental Sciences, Beijing 100012, China
相关基金：This study was supported jointly by the National Knowledge Innovation Program of the Chinese Academy of Sciences （KZCX2-YW-102） and the National Natural Science Foundation of China （40525011, 40632011）. Thanks are due to Dr. Xing Baoshan for his kindly offering of Amherst HA sample.

作者： MEI Yi[1], WANG Liying[2], WU Fengchang[3]

关键词：有机物浓度, 溶解有机质, 分子构象, 荧光特性, 水化学, HOCS, 有机污染物, DOM, effect of water chemistry, dissolved organic matter, fluorescence characteristic

中文摘要：

以前的研究证明溶解有机物(DOM ) 的水化学和集中能与恐水病的器官的沾染物(hoc ) 影响它的分子的符合构造和有约束力的特征。然而，从水化学和 DOM 的集中结果的 DOM 的 conformational 变化广泛地没被调查；因此，关于有 hoc 的有约束力的性质的矛盾的报告在文学是可得到的。在二腐殖的酸的荧光性质上的这研究，离子的力量的效果， pH 和 DOM 集中(哈) ，也就是 Fluka 哈并且阿默斯特哈，被三维的刺激排放矩阵荧光光谱学(3DEEM ) 和不变的荧光极化(FP ) 调查技术。结果不仅支持以前的观察由另外的调查者获得了，但是在不同的水化学和 DOM 集中条件下面关于荧光性质和腐殖的酸的分子的符合构造揭示了一些新信息，它能与 hoc 使它的有约束力的机制和有约束力的性质清楚些。

英文摘要：

Previous studies showed that water chemistry and concentrations of dissolved organic matter （DOM） could affect its molecular conformation and binding characteristics with hydrophobic organic contaminants （HOCs）. However, the conformational change of DOM resultant from water chemistry and concentrations of DOM was not extensively investigated; therefore, the contradictory reports regarding the binding property with HOCs were available in literature. In this study, the effects of ionic strength, pH and DOM concentrations on the fluorescence properties of two humic acids （HA）, namely Fluka HA and Amherst HA, were investigated by three-dimensional excitation-emission matrix fluorescence spectroscopy （3DEEM） and steady-state fluorescence polarization （FP） techniques The results not only corroborated previous observations obtained by other investigators, but revealed some new information about the fluorescence properties and molecular conformation of the humic acids under different water chemistry and DOM concentration conditions, which could shed light on its binding mechanisms and binding properties with HOCs.

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