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以榉木聚木糖为原料,以氯磺酸为酯化剂,进行了聚木糖的硫酸酯化。利用红外光谱以及核磁氢谱对硫酸酯化聚木糖进行了结构表征。研究结果表明,成功制备了电荷密度为-3.12 mmol/g,取代度为1.11的聚木糖硫酸酯。本文还对硫酸酯化后的聚木糖用于含有40 mg/L乙基紫染料的模拟印染废水的脱色性能进行了探讨。发现,在最佳的脱色工艺条件,即聚木糖硫酸酯用量为140 mg/L和p H为9时,模拟印染废水的脱色效率能达到97.5%。工业废水中存在的各种离子对聚木糖硫酸酯脱色效果影响不太明显。
Using xylose xylose as raw material and chlorosulfonic acid as esterifying agent, xylo-oligosaccharide was sulfated. The structure of sulfated poly xylose was characterized by FTIR and 1H NMR. The results show that the xylose sulfate with a charge density of -3.12 mmol / g and a substitution degree of 1.11 has been successfully prepared. In addition, the decolorization performance of sulfuric acid esterified xylan in simulated dyeing wastewater containing 40 mg / L ethyl violet was also discussed. It was found that under the optimum conditions of decolorization, that is, the amount of xylose sulfate is 140 mg / L and p H is 9, the decolorization efficiency of simulated dyeing wastewater can reach 97.5%. The various ions present in industrial wastewater have little effect on the decolorization of xylose sulfate.