期刊论文

Adsorption properties of magnetic crab shell-derived adsorption material for malachite green in solution

中文

中南大学学报(自然科学版)

1672-7207

2021

52

05

1446-1455

10.11817/j.issn.1672-7207.2021.05.006

U1802254:国家自然科学基金 51871201:国家自然科学基金 LY18E040003:浙江省自然科学基金

本校为其他机构

对废弃蟹壳进行活化和碳化处理,采用共沉淀的方法将Fe3O4附载到蟹壳炭上,制备磁性蟹壳活性炭（MAC）,并探究其对染料孔雀石绿（MG）的吸附性能和机理。研究结果表明:MAC去除水溶液中的MG时具有1 876.58 mg/g的最大吸附容量,实验结果与Langmuir吸附等温模型和准二级动力学模型拟合结果高度吻合。MAC的高吸附容量主要归因于活化过程创造的大量微米级孔洞以及蟹壳本身去除碳酸盐后的生物结构,提供了充足的活性位点。磁性分离回收后,MAC可以用无水乙醇脱附再生。经过5次MG吸附脱附循环,MAC保持84.6%的高吸附率。对于废弃物的二次利用和实际的废水处理而言,MAC具有高吸附效率和快速磁分离性能,是一种...

The magnetic crab shell activated carbon(MAC)was prepared by co-precipitation method of loading Fe_3O_4 onto the crab shells that had been activated and carbonized.The adsorption performance and mechanism were explored by a series of experiments.The results show that MAC is used to remove MG cationic dyes in aqueous solution,which has a maximum adsorption capacity of 1 876.58 mg/g.The experimental data is highly consistent with the Langmuir adsorption isotherm model and the quasi-second-order kinetic model.The high adsorption capacity of MAC is mainly due to the large number of micro-scale por...