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采用超滤膜法将2-丁烯醛生产废水中的有机物分为相对分子质量不同的7个级分,并应用溶解性有机碳(dissolved organic carbon,DOC)、紫外吸收光谱(ultraviolet spectrum,UV)、傅里叶变换红外光谱(fourier transform infrared spectrometer,FT-IR)和气相色谱/质谱联用仪(gas chromatography with mass spectrometry,GC-MS)技术对不同相对分子质量区间的有机物所占比例及物质结构进行了研究.结果表明,废水中相对分子质量<1×103的有机物所占比例最高,达到88.57%;采用GCMS对废水中相对分子质量<1×103的级分进行分析,定性出27种化合物,包含醛、酮、酯、醇、酚、酸、烷烃类及其他苯系物等,其峰面积占有机物峰面积总和的比例分别为6.9%、5.3%、35.4%、13.2%、4.6%、0.4%、1.7%、16.8%,总和为84%.UV和FT-IR分析结果均显示不同相对分子质量区间的光谱吸收特征没有明显差别,级分中存在含有不饱和双键、羟基、羰基化合物及芳香族化合物,与GC-MS检测结果相吻合.研究结果为废水处理工艺的开发与优化提供了重要的指导作用.
The organic compounds in the wastewater of 2-butenal were separated into seven fractions with different molecular weight by using the ultrafiltration membrane method, and dissolved organic carbon (DOC), ultraviolet spectrum (UV) ), Fourier transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC-MS) were used to determine the proportion of organic compounds with different relative molecular weight The results showed that the proportion of organic matter with relative molecular weight <1 × 103 in wastewater was the highest (88.57%), and the fraction of relative molecular mass <1 × 103 in wastewater was analyzed by GCMS The compounds, including aldehydes, ketones, esters, alcohols, phenols, acids, alkanes and other benzene compounds, accounted for 6.9%, 5.3%, 35.4%, 13.2%, and 4.6% of the total area of the organic compounds %, 0.4%, 1.7%, 16.8% and 84%, respectively.The results of UV and FT-IR showed no significant difference in spectral absorption between different molecular weight regions, Carbonylation And aromatic compounds thereof, and the detection result of GC-MS consistent. The results provided an important role in guiding the development and optimization of the wastewater treatment process.