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

Wenxiang Jing; Chai Yang; Xiaoyan Lin; Min Tang; Dongming Lian; Ying Yu; Dongyang Liu

doi:10.1039/d4ra06363e

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

RSC Adv. 2024 Dec 20;14(54):39995-40005. doi: 10.1039/d4ra06363e. eCollection 2024 Dec 17.

Authors

Wenxiang Jing^{1

2

3}, Chai Yang², Xiaoyan Lin^{1

3}, Min Tang², Dongming Lian², Ying Yu², Dongyang Liu²

Affiliations

¹ School of Materials and Chemistry, Southwest University of Science and Technology 621010 Mianyang Sichuan China [email protected].
² Yibin Forestry and Bamboo Industry Research Institute Yibin 644005 China.
³ Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology Mianyang 621010 China.

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⁺.