Biofabricated graphene-magnetite nanobioaerogel with antibiofilm property: Response surface methodology based optimization for effective removal of heavy metal ions and killing of bacterial pathogens

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2023-11-01 DOI:10.1016/j.cej.2023.145976

Baskaran Ramalingam, Sujoy K. Das

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引用次数: 0

Abstract

Fabrication of mechanically stable porous materials with excellent adsorption capacity for different types of heavy metal ions simultaneously is still scientifically and technically challenging. Herein, the Response Surface Methodology (RSM) was employed to statistically fabricate the biological materials (collagen, chitosan) functionalized graphene–magnetite (BGM) hybrid nanobioaerogel. RSM statistically predicted the concentration of GO, Fe2+, collagen–chitosan mixture and glutaraldehyde as 6.78 mg/mL, 0.20 M, 61.39 mg/mL and 68.63 µM, respectively, for the maximum responses of Young’s modulus (5.26 kPa) and adsorption capacity. Various spectroscopic and microscopic techniques demonstrated the porous interconnected network structure and superparamagnetic behavior of BGM hybrid nanobioaerogel with a saturation magnetization value of 19.34 emu/g. The nanobioaerogel exhibited fast and high adsorption for Cu(II) (183.96±5.68 mg/g, 29 min), Cd(II) (67.04±1.53 mg/g, 36 min), Cr(VI) (134.49±5.21 mg/g, 45 min) and As(III) (64.62±2.40 mg/g, 40 min) at optimum pH 5.0 and 60 °C in multicomponent system, which is almost four times higher than commercially available activated carbon and other reported literatures. The adsorption process follows the Langmuir isotherm suggesting the monolayer chemisorption, follows pseudo–second order (Cu(II)) and intraparticle diffusion (Cd(II), Cr(VI) and As(III)) models and suggesting rate–limiting step is surface binding and internal pores. ATR–FTIR spectrum revealed that hydroxyl, amine, carboxylate, carbohydrate and iron functional groups in hybrid BGM nanobioaerogel interacted with the heavy metals in a multicomplex manner. It was easily regenerated and reused for multiple adsorptions–desorption cycles. In addition, it also showed >5 log reduction in 4 h against different pathogens and antibiofouling agents.

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具有抗菌膜性能的生物制备石墨烯-磁铁矿纳米生物气凝胶:基于响应面法的优化，以有效去除重金属离子并杀死细菌病原体

制备同时对不同类型的重金属离子具有优异吸附能力的机械稳定的多孔材料在科学和技术上仍然具有挑战性。本文采用响应面法(RSM)统计制备了生物材料(胶原蛋白、壳聚糖)功能化石墨烯-磁铁矿(BGM)杂化纳米生物气凝胶。RSM统计预测氧化石墨烯、Fe2+、胶原-壳聚糖混合物和戊二醛的浓度分别为6.78 mg/mL、0.20 M、61.39 mg/mL和68.63µM时，对杨氏模量(5.26 kPa)和吸附量的响应最大。各种光谱和显微技术证明了BGM杂化纳米生物气凝胶的多孔互联网络结构和超顺磁行为，饱和磁化值为19.34 emu/g。纳米生物气凝胶对Cu(II)(183.96±5.68 mg/g, 29 min)、Cd(II)(67.04±1.53 mg/g, 36 min)、Cr(VI)(134.49±5.21 mg/g, 45 min)和As(III)(64.62±2.40 mg/g, 40 min)的吸附效果比市购活性炭和其他文献报道的吸附效果高近4倍。吸附过程遵循Langmuir等温线，表明其为单层化学吸附，遵循准二级(Cu(II))和颗粒内扩散(Cd(II)， Cr(VI)和As(III))模型，表明限速步骤是表面结合和内部孔隙。ATR-FTIR光谱显示，杂化BGM纳米生物气凝胶中的羟基、胺基、羧酸基、碳水化合物和铁官能团与重金属呈多络合物相互作用。它易于再生和重复用于多次吸附-解吸循环。此外，对不同病原菌和抗菌素，在4 h内也表现出>5 log的降低。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.