Efficiency removal of rhodamine B by MoS2/magnetic potato residues biochar: Performance and mechanism

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2025-06-21 DOI:10.1016/j.indcrop.2025.121390

Jingjing Guo , Longwei Fu , Ruili Gao , Yaya Zhang , Cuicui Yin , Bin Xue

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Abstract

Despite extensive research on dyes wastewater treatment with molybdenum disulfide (MoS₂) and magnetic biochar (MBC), the specific removal efficiency and mechanism of Rhodamine B (RhB) by MoS₂-loaded magnetic potato residue biochar remain unclear. In this study, potato residue biochar (BC) and a novel MoS₂/magnetic potato residues biochar (MoS₂/MBC) were prepared, and the removal capacities and mechanisms of biochars were explored through batch sorption experiments. Compared with that of BC (48.84 mg·g⁻¹), the maximum RhB sorption capacities of MoS₂/MBC increased to 260.93 mg·g⁻¹. The kinetics and isothermal adsorption of RhB by MoS₂/MBC were better fitted by the pseudo-second order and Langmuir models, respectively, suggesting that the RhB removal by MoS₂/MBC predominantly involved chemical monolayer adsorption. The adsorption of RhB on MoS₂/MBC was an entropy-driven process, and compared to BC, the two typical cations (calcium ion and magnesium ion) had a smaller impact on the RhB removal performance of MoS₂/MBC. In addition, the adsorption of MBC by RhB was primarily facilitated through hydrogen bond, electrostatic adsorption, π-π superposition and surface complexation. Collectively, these findings indicate that magnetic potato residues biochar is a highly effective adsorbent for RhB, has promising potential for practical applications, and has a controllable cost.

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MoS2/磁性马铃薯渣生物炭高效脱除罗丹明B：性能与机理

尽管对二硫化钼（MoS2）和磁性生物炭（MBC）处理染料废水进行了广泛的研究，但负载MoS2的磁性马铃薯渣生物炭对罗丹明B （Rhodamine B, RhB）的特定去除效率和机理尚不清楚。本研究制备了马铃薯渣生物炭（BC）和新型的MoS2/磁性马铃薯渣生物炭（MBC），并通过批量吸附实验探讨了生物炭的去除能力和机理。与BC（48.84 mg·g−1）相比，MoS2/MBC对RhB的最大吸附量增加到260.93 mg·g−1。MoS2/MBC对RhB的吸附动力学和等温吸附分别较好地符合拟二阶和Langmuir模型，表明MoS2/MBC对RhB的去除主要是化学单层吸附。MoS2/MBC对RhB的吸附是一个熵驱动的过程，与BC相比，两种典型阳离子（钙离子和镁离子）对MoS2/MBC对RhB去除性能的影响较小。此外，RhB对MBC的吸附主要通过氢键、静电吸附、π-π叠加和表面络合作用促进。综上所述，磁性马铃薯渣生物炭是一种高效的RhB吸附剂，具有良好的实际应用潜力，且成本可控。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.