石化污水厂二级出水溶解性有机物分级解析研究

以某石化污水处理厂二级出水为研究对象,采用大孔吸附树脂将污水中溶解性有机物分离成亲水性物质、疏水酸性物质、疏水中性物质和疏水碱性物质4个组分,分析了各组分的有机物的组成特征、三维荧光光谱特征及红外光谱特征.结果表明,亲水性物质和疏水酸性物质分别占水样中溶解性有机碳的49%和29%,是该石化污水厂二级出水中的主要物质类别.亲水性物质中含有较多的生物源腐殖质类物质,疏水中性物质含有较多的芳香族蛋白质和溶解性微生物代谢产物类物质.4种组分的红外光谱图中600~1200cm-1波数的指纹区波峰数量最多,多为芳香类同分异构体化合物.

Classification and analysis of dissolved organic matter in the effluent of a petrochemical wastewater treatment plant

Dissolved organic matter (DOM) in a biological effluent collected from a typical petrochemical wastewater treatment plant was isolated and fractionated using resin adsorption method. The fractions were operationally categorized as hydrophilic substances (HIS), hydrophobic acids (HOA), hydrophobic neutrals (HON), and hydrophobic bases (HOB). The dissolved organic carbon (DOC), specific UV absorbance, three dimensional excitation emission matrix fluorescence spectroscopy (3DEEM), ultraviolet spectrum and infra-red spectrum characteristics of the 4 fractions were analyzed. HIS and HOA were the main fractions and they occupied 49% and 29% of DOC in the effluent, respectively. The fraction of HON contained more aromatic proteins and soluble microbial products, while the fraction of HIS contained more humus, which were predominately microbial products derived by the analysis of 3DEEM. The peaks of infra-red spectrum of the 4 fractions mainly distributed in the district of 600~1200cm-1, indicating that similar compounds of balmy isomers exist in the wastewater samples.