• 关键词：疏水性有机酸  紫外-可见光谱  红外光谱  荧光光谱

• 基金项目：辽宁省科技厅项目(No.2005229003,200601117-232);辽宁大学“211”基金

• 薛爽
• 1. 辽宁大学 环境学院, 沈阳 110036; 2. 辽宁省高校污染控制与环境修复重点实验室, 沈阳 110036

• 赵庆良
• 1. 哈尔滨工业大学 市政环境工程学院, 哈尔滨 150090; 2. 哈尔滨工业大学 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 魏亮亮
• 1. 哈尔滨工业大学 市政环境工程学院, 哈尔滨 150090; 2. 哈尔滨工业大学 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 马溪平
• 1. 辽宁大学 环境学院, 沈阳 110036; 2. 辽宁省高校污染控制与环境修复重点实验室, 沈阳 110036

• 惠秀娟
• 1. 辽宁大学 环境学院, 沈阳 110036; 2. 辽宁省高校污染控制与环境修复重点实验室, 沈阳 110036

• 侯伟
• 1. 辽宁大学 环境学院, 沈阳 110036; 2. 辽宁省高校污染控制与环境修复重点实验室, 沈阳 110036

• 摘要：选取2个地表水体水样、2个城市污水处理厂二级处理出水水样和2个土样,从中提取出疏水性有机酸(HPO-A).采用紫外-可见光谱、红外光谱和荧光光谱技术,对不同来源的HPO-A的特性进行了比较和表征.结果表明,这6种HPO-A的吸光度均是随着波长的增加而下降.280nm处的吸收系数(A₂₈₀)和600nm处的吸收系数(A₆₀₀)均可排序为:土壤HPO-A>地表水体HPO-A>二级处理出水HPO-A.HPO-A的E₂₅₃/E₂₀₃(波长在253nm处的吸光度与波长在203nm处的吸光度的比值)与A₆₀₀之间缺乏必然的联系.土壤HPO-A中不含有—CH₃官能团.C=O官能团在地表水体HPO-A和土壤HPO-A中的含量较高,而脂族化合物在二级处理出水HPO-A中的含量较高.二级处理出水HPO-A中含有酰胺类化合物.类富里酸和类腐殖酸物质是HPO-A中主要的荧光物质.在地表水体HPO-A和二级处理出水HPO-A中,类富里酸荧光物质的相对含量较高.类溶解性微生物代谢产物荧光物质的存在与否与HPO-A的来源无关.

• Abstract：Hydrophobic acid (HPO-A) was isolated from two surface water samples,two secondary treated effluent samples taken from wastewater treatment plants,as well as two soil samples. Various spectroscopic techniques were employed for the comparison and characterization of HPO-Awith different origins,including ultraviolet visible (UV/Vis),Fourier-transform infrared (FT-TR) and fluorescence spectroscopies. The results showed that the UV/Vis absorbance of the six HPO-Agenerally decreased as the wavelength increased. Both absorption coefficients at 280 nm (A²⁸⁰) and at 600 nm (A₆₀₀) followed the order HPO-Afrom soils > HPO-Afrom surface waters > HPO-Afrom secondary treated effluents. Aweak relationship existed between A₆₀₀ and the ratio of absorbances at 253 nm (E₂₅₃) and 203 nm (E₂₀₃) of HPO-A. There were no ―CH₃ groups in HPO-Afrom soils. Both HPO-Afrom surface waters and from soils had greater C=Ocontent while HPO-Afrom secondary treated effluents had greater content of aliphatic compounds. HPO-Afrom secondary treated effluents contained amides. Humic acid-and fulvic acid-like organics were the predominant fluorescent materials in HPO-A. The content of fulvic acid-like fluorescent materials was relatively high in both HPO-Afrom surface waters and from secondary treated effluents. The presence or absence of soluble microbial byproduct-like materials in HPO-A,was irrelevant to the origin of HPO-A.

• Key words：hydrophobic acid  UV/Vis spectroscopy  FT-IR spectroscopy  fluorescence spectroscopy

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