Optimizing Parthenium waste: biomass-derived carbon adsorbents for adsorbing Amido Black 10B dye analyzed through graph theory for stability and reactivity

IF 4.1 4区工程技术 Q3 ENERGY & FUELS

Biomass Conversion and Biorefinery Pub Date : 2025-04-12 DOI:10.1007/s13399-025-06786-0

M. Mahadeva Swamy, Srilatha Rao, B. Prashanth, Shilpa Patil, G. K. Prashanth, Mouhamadou Sali, A. S. Sowmyashree, H. S. Lalithamba, Pradeepa S. M, Hemantkumar N. Akolkar

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Abstract

This study investigates the feasibility of using Parthenium hysterophorus biomass as a low-cost adsorbent for the removal of Amido Black 10B dye from aqueous solutions. Raw biomass from Parthenium flowers (RPF) and activated (PFAC) was tested in batch experiments under various conditions, including adsorbent doses (0.02–0.1 g/L), pH levels (2–12), initial dye concentrations (50–500 mg/L), and contact times (5–30 min) at 298 K. Comprehensive characterization using FTIR, XRD, SEM, EDS, and pH_PZC confirmed the adsorbent’s properties and its potential for corrosion inhibition. The adsorption process was analyzed using isotherm models (Langmuir and Freundlich) and kinetic models. Electrochemical tests assessed the untreated and treated biomass’s adsorption capabilities on metal surfaces with efficiencies (η %) 66.08 and 78.82 for RPF and PFAC respectively. Von’t Hoff plots show that the ΔG is − 3.34, 3.98, and − 3.91 kJ/mol respectively at three different temperatures; ΔS is − 28.22 kJ/mol; and ΔH is − 17.87 kJ/mol. The structural stability and reactivity of the adsorbent were further analyzed using graph theory maximum eigen value of RPF 2.4892 and PFAC 2.0799.

Graphical Abstract

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优化Parthenium废物：生物质衍生碳吸附剂吸附Amido Black 10B染料，通过图论分析其稳定性和反应性

本研究探讨了利用宫草Parthenium hysteroporus生物质作为低成本吸附剂去除水中氨基黑10B染料的可行性。在不同的条件下，包括吸附剂剂量（0.02-0.1 g/L）、pH水平（2-12）、初始染料浓度（50-500 mg/L）和298 K下的接触时间（5-30 min），对Parthenium flower （RPF）和活化（PFAC）的原料生物量进行了批量实验。通过FTIR、XRD、SEM、EDS和pHPZC等综合表征，证实了吸附剂的性能和缓蚀潜力。采用等温吸附模型（Langmuir和Freundlich）和动力学模型对吸附过程进行了分析。电化学试验评估了未处理和处理的生物质对金属表面的吸附能力，RPF和PFAC的效率（η %）分别为66.08和78.82。冯霍夫图显示，在三种不同温度下，ΔG分别为−3.34、3.98和−3.91 kJ/mol；ΔS为−28.22 kJ/mol；ΔH = - 17.87 kJ/mol。利用图论分析RPF 2.4892和PFAC 2.0799的最大特征值，进一步分析了吸附剂的结构稳定性和反应性。图形抽象

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来源期刊

Biomass Conversion and Biorefinery Energy-Renewable Energy, Sustainability and the Environment

CiteScore

7.00

自引率

15.00%

发文量

1358

期刊介绍： Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.