Fabrication of cellulose acetate/chitosan blend films as efficient adsorbent for anionic water pollutants
Fabrication of cellulose acetate/chitosan blend films as efficient adsorbent for anionic water pollutants
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DOI：
10.1007/s00289-018-2467-y
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发表时间：
2019-03-01
期刊：
影响因子：
3.2
通讯作者：
Thomas, Sabu
中科院分区：
文献类型：
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作者：
Gopi, Sreerag;Pius, Anitha;Thomas, Sabu
本研究的目的是开发一种以醋酸纤维素和壳聚糖为基础的材料，通过一种简单、无害的溶剂浇铸方法制备并通过脱乙酰化方法对其进行改性。用场发射扫描电子显微镜、衰减全反射傅里叶变换红外光谱仪和静态水接触角对改性前后壳聚糖/醋酸纤维素膜的形貌、化学组成和润湿性进行了表征。对薄膜进行了电荷滴定等定量分析，以确定薄膜中对吸附现象有显着影响的可及电荷的数量。随后，在优化的条件下，首次采用脱乙酰法对不同组成的醋酸纤维和壳聚糖所制得的薄膜进行了改性，并利用上述技术对其进行了表征。通过吸附水溶液中的酸性橙7和亮黄两种已知染料，考察了改性前后的醋酸纤维/壳聚糖复合膜对淡水修复效果的影响。改性醋酸酯/壳聚糖膜对酸性橙7的脱色率(%R)和吸附容量[Q(E)(mg/g)]分别为99.8%和9.98 mg/g，对艳黄分别为99.7%和9.38 mg/g。研究结果表明，用醋酸和水混合制得的改性醋酸酯/壳聚糖薄膜可以作为一种潜在的阴离子染料水处理候选材料。
The aim of this study was to develop a material based on cellulose acetate and chitosan fabricated via a simple non-hazardous solvent casting method and modified them by deacetylation approach. Both the modified and unmodified chitosan/cellulose acetate films were well characterized in terms of their morphology, chemical moieties and wettability using field emission scanning electron microscope, attenuated total reflectance-Fourier transform infrared spectroscope and static water contact angle, respectively. A quantitative analysis such as charge titration experiments was conducted on the films to determine the number of accessible charges in the films which has a significant role in the adsorption phenomenon. Subsequently, the films developed by different compositions of cellulose acetate and chitosan were modified for the first time using deacetylation process under the optimized condition and characterized them using the same above-mentioned technologies. The impact of both unmodified and modified cellulose acetate/chitosan film on freshwater remediation was investigated by adsorbing two known dye such as acid orange 7 and brilliant yellow from the aqueous solution. An enhanced removal efficiency (% R) and adsorption capacity [q(e) (mg/g)] were observed on both the dyes (99.8% and 9.98mg/g for acid orange 7, 99.7% and 9.38mg/g for brilliant yellow) using modified cellulose acetate/chitosan films. The result obtained from this research proved that the modified cellulose acetate/chitosan film was made by acetic acid and water mixture can be used as a potential candidate for anionic dye water treatment.