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Preparation of Quaternary Ammonium Salt-Modified Chitosan Microspheres and Their Application in Dyeing Wastewater Treatment
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-21 , DOI: 10.1021/acsomega.0c03274 Ping Ke 1 , Danlin Zeng 1 , Ke Xu 1 , Jiawei Cui 1 , Xin Li 1 , Guanghui Wang 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-09-21 , DOI: 10.1021/acsomega.0c03274 Ping Ke 1 , Danlin Zeng 1 , Ke Xu 1 , Jiawei Cui 1 , Xin Li 1 , Guanghui Wang 1
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An efficient adsorbent (a quaternary ammonium salt-modified chitosan microsphere, CTA-CSM) was synthesized via an emulsion cross-linking reaction between 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CTA) and chitosan (CS). The adsorption efficiency of the CTA-CSM as an adsorbent was studied using methyl orange dye to evaluate its suitability for wastewater purification. The characterization results showed that the CTA groups were successfully grafted onto the CS microspheres, and the as-prepared CTA-CSM samples exhibited a smooth surface and good dispersibility. The modification of CTA on CTA-CSM significantly improved its ability to remove methyl orange dye. The adsorption process of methyl orange by CTA-CSM was well described by the Langmuir isotherm model and followed the pseudo-second-order kinetic model. Under the optimal conditions, the maximum removal rate (98.9%) and adsorption capacity (131.9 mg/g) of CTA-CSM was higher than those of other previous reports; its removal rate for methyl orange was still up to 87.4% after five recycles. Hence, CTA-CSM is a very promising material for practical dyeing wastewater purification.
中文翻译：
季铵盐改性壳聚糖微球的制备及其在印染废水处理中的应用
通过3-氯-2-羟丙基三甲基氯化铵（CTA）和壳聚糖（CS）的乳液交联反应合成了一种高效吸附剂（季铵盐改性壳聚糖微球，CTA-CSM）。使用甲基橙染料研究了 CTA-CSM 作为吸附剂的吸附效率，以评估其对废水净化的适用性。表征结果表明，CTA基团成功接枝到CS微球上，制备的CTA-CSM样品具有光滑的表面和良好的分散性。 CTA对CTA-CSM的修饰显着提高了其去除甲基橙染料的能力。 CTA-CSM对甲基橙的吸附过程可以用Langmuir等温线模型很好地描述，并遵循准二级动力学模型。在最佳条件下，CTA-CSM的最大去除率（98.9%）和吸附容量（131.9 mg/g）均高于以往报道；经过5次循环使用后，甲基橙去除率仍高达87.4%。因此，CTA-CSM是一种非常有前途的实用印染废水净化材料。
更新日期：2020-09-29
中文翻译：
季铵盐改性壳聚糖微球的制备及其在印染废水处理中的应用
通过3-氯-2-羟丙基三甲基氯化铵（CTA）和壳聚糖（CS）的乳液交联反应合成了一种高效吸附剂（季铵盐改性壳聚糖微球，CTA-CSM）。使用甲基橙染料研究了 CTA-CSM 作为吸附剂的吸附效率，以评估其对废水净化的适用性。表征结果表明，CTA基团成功接枝到CS微球上，制备的CTA-CSM样品具有光滑的表面和良好的分散性。 CTA对CTA-CSM的修饰显着提高了其去除甲基橙染料的能力。 CTA-CSM对甲基橙的吸附过程可以用Langmuir等温线模型很好地描述，并遵循准二级动力学模型。在最佳条件下，CTA-CSM的最大去除率（98.9%）和吸附容量（131.9 mg/g）均高于以往报道；经过5次循环使用后，甲基橙去除率仍高达87.4%。因此，CTA-CSM是一种非常有前途的实用印染废水净化材料。
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