MnFe2O4-loaded bamboo pulp carbon-based aerogel composite: synthesis, characterization and adsorption behavior study for heavy metals removal†

IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2024-12-20 DOI:10.1039/D4RA06363E
Wenxiang Jing, Chai Yang, Xiaoyan Lin, Min Tang, Dongming Lian, Ying Yu and Dongyang Liu
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引用次数: 0

Abstract

Heavy metal wastewater is a direct threat to the ecological environment and human health because it is highly toxic at low concentrations. Therefore, it is very important to explore and develop efficient wastewater treatment agents. MnFe2O4-loaded bamboo pulp carbon-based aerogel (MCA) is prepared by directional freeze-drying and carbonization. SEM, TEM, XPS, XRD, BET and FTIR are used to evaluate the physical and chemical properties of MCA. Meanwhile, the adsorption performances of MCA on Pb2+, Cu2+ and Cd2+ are also studied by adsorption kinetics, isothermal curves and thermodynamics. The results show that the adsorption process involves chemical adsorption and physical adsorption, and the adsorption process is a spontaneous endothermic process. The maximum adsorption capacities of MCA for Pb2+, Cu2+ and Cd2+ obtained in the adsorption isotherm experiments were 74.38, 84.21 and 73.63 mg g−1, respectively, showing excellent adsorption performance for Pb2+, Cu2+ and Cd2+. Therefore, the MCA has potential application for wastewater purification of heavy metals containing Pb2+, Cu2+ and Cd2+, meanwhile, this study provides some guidance for the design and application of microspheres for the separation and removal of Pb2+, Cu2+ and Cd2+.

Abstract Image

负载mnfe2o4竹浆碳基气凝胶复合材料:合成、表征及对重金属的吸附行为研究
重金属废水在低浓度时就具有剧毒,直接威胁着生态环境和人类健康。因此,探索和开发高效的废水处理剂非常重要。本研究采用定向冷冻干燥和碳化法制备了含 MnFe2O4 的竹浆碳基气凝胶(MCA)。利用 SEM、TEM、XPS、XRD、BET 和 FTIR 评估了 MCA 的物理和化学性质。同时,还通过吸附动力学、等温线和热力学研究了 MCA 对 Pb2+、Cu2+ 和 Cd2+ 的吸附性能。结果表明,吸附过程包括化学吸附和物理吸附,吸附过程为自发内热过程。在吸附等温线实验中,MCA 对 Pb2+、Cu2+ 和 Cd2+ 的最大吸附容量分别为 74.38、84.21 和 73.63 mg g-1,显示出对 Pb2+、Cu2+ 和 Cd2+ 的优异吸附性能。因此,MCA 在含 Pb2+、Cu2+ 和 Cd2+ 重金属废水净化方面具有潜在的应用价值,同时,本研究也为设计和应用微球分离去除 Pb2+、Cu2+ 和 Cd2+ 提供了一定的指导。
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来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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