生物炭
壳聚糖
吸附
污染物
活性炭
材料科学
复合材料
制浆造纸工业
化学
化学工程
废物管理
有机化学
热解
工程类
作者
Xu Su,Xuanming Wang,Ziyi Ge,Zhengrong Bao,Lin Li,Yixuan Chen,Wen Qi Dai,Sun Yuanyuan,Hechong Yuan,Wen Yang,Jun Meng,Hailong Wang,Suresh C. Pillai
标识
DOI:10.1016/j.cej.2024.150387
摘要
The treatment of dye pollutants remains a challenge in the current management of the water environment. In this study, an innovative biochar material co-modified with KOH and chitosan was synthesized. The morphology and physicochemical properties of the modified biochar material were assessed by SEM, FTIR, XPS, XRD, and thermogravimetric analyses. The results revealed a significant enhancement in chitosan loading due to the pretreatment of biochar with KOH. The co-modified biochar with KOH and chitosan (CHKBC) exhibited an enriched composition of functional groups such as − COOH, −NH2, and − OH, leading to a substantial increase in the maximum adsorption of MB by the biochar from 8.83 mg g−1 to 62.04 mg g−1, a 7.03-fold increase. The excellent adsorption performance of CHKBC for MB was maintained at different solution temperature (288–––318 K) and pH (5–––11) conditions. The main adsorption mechanisms of MB removal by CHKBC involved ion exchange, pore filling, electrostatic attraction, π - π interactions, and hydrogen bonding. Overall, CHKBC has higher chitosan loading, more uniform chitosan distribution, and better adsorption efficiency of MB. It is a promising adsorption material with low cost and a simple production process.
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