五元
活性炭
吸附
壳体(结构)
水溶液中的金属离子
金属
离子
碳纤维
化学
无机化学
材料科学
化学工程
冶金
复合材料
物理化学
有机化学
复合数
合金
工程类
作者
Dounya Khalla,Karima Belguidoum,Mouna Nacef,Mouni Boukour,Mohamed Lyamine Chelaghmia,Omar Khelifi,Radia Selaimia,Nadjette Bengourna,Abed Mohamed Affoune,Habiba Amira-Guebailia
标识
DOI:10.1016/j.matchemphys.2024.129646
摘要
For several decades, heavy metals have been a source of environmental pollution and the scientific community is continually asked for facing this threat. This study investigated the performance of an activated carbon made from chestnut shell (CNS-AC) in adsorbing Cd(II), Cr(VI), Ni(II), Cu(II), and Zn(II) in single and quinary-metal systems. The CNS-AC was characterized using FT-IR, TGA/DTG, FEG-SEM, EDX, and BET. Experimental results revealed that the adsorption follows the pseudo-second order kinetics, both in single and quinary systems. The equilibrium results reflect the Langmuir equilibrium model, with maximum adsorption capacities (mg.g-1) varying from 21.34 for Cd(II) to 73.16 for Zn(II); in single-metal systems, and from 9.80 for Cd(II) to 33.33 for Cu(II); in the quinary-metal systems. The overall maximum adsorption capacity in quinary-metal solution was of 113.22 mg g-1,higher than qm for each single-metal system. Furthermore, it was found that Cd(II) and Zn(II) pollution abatement to the standard limits was achieved in only one stage while two stages were enough to achieve the related pollution abatement for the other metals. A computational investigation was conducted using the Gaussian 09 and Density Functional Theory (DFT) methods, assuming the generation of organometallic complexes between the functionalized activated carbon and the metal ions. CNS-AC's carboxyl and amine functional groups seemed to be involved in the metal ions adsorption. The calculated bonding energies between the adsorbent and metal ions decreased in the following order Cu(II)
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