Bushra Akram, Aisha Umar, M Ajmal Ali, Mohamed S Elshikh, Chinenye Adaobi Igwegbe, Rashid Iqbal, Soumya Ghosh
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Thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic. The pseudo-second-order kinetic model best described the data, indicating chemisorption as the rate-limiting step. The data matched best to the Langmuir model, indicating that the adsorption occurs as a monolayer on uniform surfaces with a finite number of binding sites. The model showed a strong correlation (R² = 0.991) and a maximum adsorption capacity (q<sub>max</sub>) of 8.203 mg/g. Principal component analysis (PCA) identified temperature as the dominant factor, with the primary component, PC1 capturing 100% of its effect. The mechanisms involved in ARS biosorption on A. maurorum include electrostatic interactions, hydrogen bonding, hydrophobic interactions, dipole-dipole interactions, and π-π stacking. 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引用次数: 0
摘要
茜素红 S 等合成染料是造成环境污染的主要原因。本研究探讨了 Alhagi maurorum 生物吸附剂从水溶液中去除茜素红 S (ARS) 的生物吸附潜力。傅立叶变换红外光谱(FTIR)用于分析生物吸附剂的吸附位点。为了最大限度地吸附染料,对各种参数进行了优化。在 pH 值为 6、温度为 60 °C 的条件下,使用 0.9 克生物吸附剂,在 30 分钟内吸附 25 ppm 浓度的染料,最佳去除率为 82.26%。使用各种等温模型和动力学模型对数据进行建模,以了解吸附行为。热力学参数表明,吸附过程是自发和内热的。伪二阶动力学模型对数据进行了最佳描述,表明化学吸附是限速步骤。数据与 Langmuir 模型最为吻合,表明吸附是在具有有限结合位点的均匀表面上以单层形式发生的。该模型显示出很强的相关性(R² = 0.991),最大吸附容量(qmax)为 8.203 毫克/克。主成分分析(PCA)确定温度是主导因素,主成分 PC1 对温度的影响达到 100%。A. maurorum 对 ARS 的生物吸附机制包括静电作用、氢键作用、疏水作用、偶极子-偶极子作用和 π-π 堆积作用。Alhagi maurorum在生物吸附受污染水体中的有毒染料方面表现出了巨大的潜力,建议进一步研究其实际应用。
Kinetic and thermodynamic analysis of alizarin Red S biosorption by Alhagi maurorum: a sustainable approach for water treatment.
Synthetic dyes, such as Alizarin Red S, contribute significantly to environmental pollution. This study investigates the biosorption potential of Alhagi maurorum biosorbent for the removal of Alizarin Red S (ARS) from aqueous solutions. Fourier transform infrared spectroscopy (FTIR) was used to analyze the biosorbent's adsorption sites. Various parameters were optimized to maximize dye adsorption. An optimal removal efficiency of 82.26% was attained by employing 0.9 g of biosorbent with a 25 ppm dye concentration at pH 6 and 60 °C over 30 min. The data were modeled using various isothermal and kinetic models to understand the adsorption behavior. Thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic. The pseudo-second-order kinetic model best described the data, indicating chemisorption as the rate-limiting step. The data matched best to the Langmuir model, indicating that the adsorption occurs as a monolayer on uniform surfaces with a finite number of binding sites. The model showed a strong correlation (R² = 0.991) and a maximum adsorption capacity (qmax) of 8.203 mg/g. Principal component analysis (PCA) identified temperature as the dominant factor, with the primary component, PC1 capturing 100% of its effect. The mechanisms involved in ARS biosorption on A. maurorum include electrostatic interactions, hydrogen bonding, hydrophobic interactions, dipole-dipole interactions, and π-π stacking. Alhagi maurorum showed promising potential for biosorbing toxic dyes from contaminated water, suggesting further investigation for practical applications.
期刊介绍:
BMC Biotechnology is an open access, peer-reviewed journal that considers articles on the manipulation of biological macromolecules or organisms for use in experimental procedures, cellular and tissue engineering or in the pharmaceutical, agricultural biotechnology and allied industries.