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利用XAD-8大孔吸附树脂将稠油废水中的溶解性有机物进行分离,对稠油废水DOM及各分离组分进行TOC、UV254、硬度、Ca2+、Mg2+浓度等的测定,并采用官能团滴定、红外光谱等分析方法对稠油废水进行表征。结果表明:稠油废水中DOM以包括腐殖酸和富里酸两部分物质的憎水部分为主,两者分别占总TOC的18.64%和43.58%,亲水部分仅占9.35%,同时还有一部分有机物未分离出;紫外吸光度结果表明,稠油废水及各组分的芳香化程度为:腐殖酸>富里酸>稠油废水>亲水部分;官能团滴定结果表明,各组分的总酸度大小为富里酸>腐殖酸>亲水部分;稠油废水中DOM及各组分的硬度和Ca2+、Mg2+分布分析结果表明,腐殖酸和富里酸均和Ca2+、Mg2+发生反应,由此可推断由于腐殖酸和富里酸与交换下来的Ca2+、Mg2+的吸附作用导致两者可能因此粘附在大孔弱酸树脂上,从而影响树脂正常运行;红外光谱分析结果与官能团滴定结果一致。
The XAD-8 macroporous resin was used to separate the dissolved organic matter from the heavy oil wastewater. The DOM and its fractions of heavy oil wastewater were measured for TOC, UV254, hardness, Ca2 + and Mg2 + concentration. Infrared spectroscopy and other analytical methods for the characterization of heavy oil wastewater. The results showed that the DOM in the heavy oil wastewater was dominated by the hydrophobic part including humic acid and fulvic acid, accounting for 18.64% and 43.58% of the total TOC and only 9.35% of the hydrophilic part, respectively Some of the organic compounds were not separated out. The results of UV absorbance showed that the aromatics degree of heavy oil wastewater and each component were: humic acid> fulvic acid> heavy oil wastewater> hydrophilic fraction; titration of functional groups showed that the total acidity The size of fulvic acid> humic acid> hydrophilic part; heavy oil wastewater DOM and various components of the hardness and Ca2 +, Mg2 distribution analysis showed that both humic acid and fulvic acid and Ca2 +, Mg2 + reaction, which can be It is inferred that due to the adsorption of humic acid and fulvic acid with exchanged Ca2 + and Mg2 +, both of them may adhere to the macroporous weak acid resin, thus affecting the normal operation of the resin. The results of infrared spectroscopy are consistent with the titration of functional groups.