生物吸附
吸附
朗缪尔吸附模型
壳聚糖
铬
核化学
水溶液
生物修复
化学
受污染的水
傅里叶变换红外光谱
化学工程
材料科学
污染
冶金
环境化学
吸附
有机化学
生态学
工程类
生物
作者
Thanh Luan Nguyen,Asif Ayub,Afshan Anam,Ahmed Muteb Aljuwayid,Sarab W. Alwash,Rathab Abbass,Ali Abdul Kadhim Ruhaima,Erich Potrich,Mika Sillanpää,Safia Gul,Riyadh H. Alshammari,Saif Ullah,Khalil Ahmad,Hai Ha Pham Thi
标识
DOI:10.1016/j.jece.2023.110445
摘要
Chromium contamination, particularly in industrial and mining sectors, has become a serious issue for the aquatic system, globally. Until now, the removal of Cr(VI) have been accomplished by a variety of approaches. However, these existing techniques are economically not efficient. Here, we demonstrate quick and effective removal of Cr(VI) from water by biosorption method using simple polymer modification technique. Specifically, we synthesized native chitosan beads (NCB) and ZnO NPs modified chitosan beads (ZMCB) for the adsorptive elimination of Cr(VI) from aqueous medium. Some advanced analytical techniques such as BET, SEM-EDX, XRD and FTIR were applied to characterize the biosorbents. Both NCB and ZMCB followed Langmuir isotherm model and maximum adsorption capacity of 23.16 mg/g and 130.28 mg/g, respectively was observed at optimal conditions (1.5 g dose, pH 2, initial concentration 50 ppm at 293 K). The results showed that pseudo 2nd order (PSO) kinetic was best fitted for the biosorption process, as coefficient regression constant for PSO have highest value (R2 > 0.999). Additionally, it was observed that the ZMCB composite may be used in many Cr(VI) adsorption cycles with little decrease in adsorption efficiency (91% adsorption up to the 5th cycle). Overall, this study offers a quick and easy approach for synthesizing low-cost materials that will be extremely useful for environmental applications.
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