Removal of Ponceau Red and Carmoisine Red from water using NaOH-activated olive stone carbon: kinetic, isotherm, thermodynamic, and mechanistic studies

IF 2.1 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2026-06-08 DOI:10.1007/s11144-026-03185-y

Ahmed Salim, EL Mehdi EL Handaoui, Maha Adel, Hassan Nour, Abdeslam EL Bouari, Youssef Lghazi, Omar Tanane

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引用次数: 0

Abstract

Olive Stone Activated Carbon (OSAC) sustained the removal of Ponceau Red (PR) and Carmoisine Red (CR) from water; OSAC was developed from chemical activation using sodium hydroxide (NaOH). The properties of OSAC were studied using several analytical techniques (BET, XRD, FTIR, SEM), all confirming that OSAC has a very porous structure with lots of functional groups that interacted with PR and CR, facilitating their removal. Studies were designed to assess the interactions between various factors (e.g., contact time; amount of OSAC used; initial concentration of dye; temperature) on dye removal. Results showed that dye removal followed the pseudo-second order kinetics model while equilibrium data were best-fitted to the Langmuir isotherm with an acceptable fit to the Temkin and Sips models as well. The maximum capacity for dye removal was 425.6 mg/g (PR) and 398.4 mg/g (CR). Adsorption was spontaneous and exothermic based on the thermodynamic data. There were a number of contributing mechanisms for dye removal including: electrostatic attraction (ion charges), π–π interactions; hydrogen bonding and intraparticle diffusion. Regeneration studies demonstrated that ~ 80% of dye removal efficiency was maintained after 5 cycles of dye removal using OSAC. There are low costs to produce 1 kg of OSAC (~ $4), making it an efficient and cost-effective adsorbent for treating dye contaminated wastewater.

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用naoh活化橄榄石碳从水中去除蓬索红和卡莫辛红：动力学、等温线、热力学和机理研究

橄榄石活性炭（OSAC）对水中Ponceau Red （PR）和Carmoisine Red （CR）的去除效果较好；OSAC是用氢氧化钠（NaOH）化学活化制备的。利用BET、XRD、FTIR、SEM等分析技术对OSAC的性质进行了研究，结果表明OSAC具有多孔结构，具有大量与PR、CR相互作用的官能团，有利于其去除。研究旨在评估各种因素（如接触时间、OSAC用量、染料初始浓度、温度）对染料去除的相互作用。结果表明，染料去除符合准二级动力学模型，而平衡数据最适合Langmuir等温线，对Temkin和Sips模型也有较好的拟合。最大去除率为425.6 mg/g （PR）和398.4 mg/g （CR）。根据热力学数据，吸附是自发和放热的。有许多有助于去除染料的机制，包括：静电吸引（离子电荷），π -π相互作用；氢键和粒子内扩散。再生研究表明，使用OSAC进行5次循环脱色后，脱色效率仍保持在80%左右。生产1千克OSAC的成本较低（约4美元），使其成为处理染料污染废水的高效和经济的吸附剂。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.