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Highly efficient and ultra-rapid adsorption of malachite green by recyclable crab shell biochar
Jia Wu,Jianwei Yang,Pu Feng,Lishan Wen,Guohuan Huang,Chuanhui Xu,Baofeng Lin 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
In this study, waste crab shell was hydrothermally carbonized and then activated to prepare an effectiveand recyclable adsorbent. The adsorption performance of the adsorbent for different dyes was investigatedthrough adsorption experiments, and the results showed that it had the largest adsorption performancefor malachite green. Furthermore, the adsorption performance and mechanism of malachite greenwere investigated by static and dynamic adsorption method. The crab shell biochar could remove6142.5 mg g1 of malachite green within 3 minutes, indicating that the crab shell biochar could ultrarapidand highly efficient adsorb malachite green. In addition, the malachite green adsorbed on the crabshell biochar could be removed by calcination, which achieved the entire regeneration of the crab shellbiochar. The adsorption of malachite green by crab shell biochar adsorbent conformed to the pseudosecond-order kinetic model, the Dubinin-Radushkevich and Langmuir isotherm adsorption model. Physical and chemical characterization indicated that the adsorption mechanism of malachite greenincluded alkaline fading effect, hydrogen bonding and p-p interaction.
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