石油化工废水中有机组分剖析

采用二氯甲烷液—液萃取预处理水样，气相色谱—质谱联用技术分析了炼油厂生化曝气池进、出水，腈纶厂干法纺丝废水及其经ＳＢＲ小试处理的出水中二氯甲烷可萃取的有机组分，并半定量地评估了生化处理对这些有机组分的去除效果。结果表明，炼油厂生化曝气池对酚类及芳烃类化合物的去除效果较好，而长链脂肪烃的去除率相对较低；腈纶干法纺丝工艺废水中可萃取的有机组分主要为Ｎ，Ｎ二甲基甲酰胺，其相对含量大于９５％（ｍ／ｍ），该废水经ＳＢＲ小试处理后，原水中各种可萃取的有机化合物均得到分解，结构发生了变化，但不能全部彻底地转化为ＣＯ２和水。

Identification and Analysis of Organic Components in Process Wastewater from Petroleum and Petrochemical Industry.

Wastewater samples (the intake and the effluent of the biochemical aeration tank in a refinery,and the process wastewater from the dry process spinning of polyacrylonitrile fiber and the discharge water after the SBR process)were pretreated by liquid liquid extraction using dichloromethane as the extractant.The extractable organic components were identified and analyzed by gas chromatography mass spectrometry.The removal efficiencies of different EOC CH 2Cl 2 (Extractable Organic Compounds by CH 2Cl 2) were calculated and their types and amounts were also analyzed.The results showed that the removal efficiencies of phenols and aromatic compounds are high,whereas those of aliphatic hydrocarbons are low by the biochemical aeration process in the refinery.The major EOC CH 2Cl 2 in the process wastewater from the dry process spinning of polyacrylonitrile fiber is N,N dimethylformomide at a relative content of more than 95%(m/m).All kinds of EOC CH 2Cl 2 were almost decomposed from the raw water by the SBR process.