甲壳素
吸附
刚果红
化学
核化学
朗缪尔吸附模型
柠檬酸
萃取(化学)
化学工程
废水
生物修复
扫描电子显微镜
壳聚糖
色谱法
材料科学
有机化学
废物管理
污染
生态学
工程类
生物
复合材料
作者
Fatma Zohra Gharbi,Nabil Bougdah,Youghourta Belhocine,Najoua Sbei,Seyfeddine Rahali,Maamar Damous,Mahamadou Seydou
出处
期刊:Separations
[MDPI AG]
日期:2023-12-13
卷期号:10 (12): 599-599
标识
DOI:10.3390/separations10120599
摘要
Due to their detrimental and carcinogenic effects, synthetic organic dyes pose significant environmental and health risks. Consequently, addressing the bioremediation of industrial wastewater containing these organic dyes has become an urgent environmental concern. The adsorption using low-cost and green materials is one of the best alternative techniques for the removal of dyes. This study aims to investigate the use of chitin to eliminate Congo red (CR), an anionic dye, from wastewater. The chitin was produced from shrimp shell in a quick and environmentally friendly manner by utilizing a co-solvent (glycerol/citric acid (GLC)). The resulting adsorbent was characterized through various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and FT-IR spectroscopy. The effectiveness of CR removal with chitin was studied with respect to contact time, adsorbent dose, initial pH, equilibrium isotherms, and kinetic and thermodynamic parameters. It was observed that variations in the dye concentration and pH significantly influenced the removal of CR with chitin. Under optimal operating conditions (pH = 7, contact time = 130 min, temperature = 50 °C), the adsorption capacity reached 29.69 ± 0.2 mg/g. The experimental data revealed that CR adsorption onto a chitin adsorbent is better represented by a Langmuir isotherm.
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