In this study, composite ACCF-A was synthesized using activated carbon (AC), copper ferrite (CF), and alginate (A) and used as adsorbent to remove methylene blue dye from aqueous solution. The beads were prepared by incorporating AC/CF nanocomposites into alginate by an ionic gelation method. The synthesized ACCF-A composite was characterized using FTIR, SEM, EDX, BET, TGA, and zeta-potential. The adsorptive capacities of ACCF-A composite toward methylene blue (MB) as a model dye in aqueous solution were studied through batch adsorption experiments in which the effects of initial dye concentration, adsorbent dosage, pH, temperature, ionic strength, and contact time on MB removal efficiency were examined. Results revealed that ACCF-A had a maximum adsorption capacity of 400.0 mg/g for MB, suggesting the potential of ACCF-A as a promising adsorbent for the removal of dyes from water. The adsorbent demonstrated fast adsorption kinetics and high adsorption capacity over a wide pH range (6–12). The adsorption data were fitted using Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models. Thermodynamic results indicated that the adsorption of MB on ACCF-A was spontaneous and exothermic. The pseudo-first-order kinetic model described the MB adsorption process with good fitting. Intra-particle diffusion model indicated that diffusion is not the only rate-limiting step in the adsorption process. The developed adsorbent was successfully regenerated for up to eight consecutive cycles, with only 2% loss in adsorption capacity.

中文翻译：

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高性能藻酸盐基微珠对水中亚甲基蓝的吸附去除

在这项研究中，使用活性炭（AC），铁酸铜（CF）和藻酸盐（A）合成了复合ACCF-A，并用作吸附剂以从水溶液中去除亚甲基蓝染料。通过用离子凝胶法将AC / CF纳米复合材料掺入藻酸盐中来制备珠。使用FTIR，SEM，EDX，BET，TGA和ζ电位对合成的ACCF-A复合材料进行表征。通过分批吸附实验研究了ACCF-A复合材料对作为模型染料的亚甲基蓝（MB）在水溶液中的吸附能力，其中初始染料浓度，吸附剂用量，pH，温度，离子强度和接触时间对检查了MB去除效率。结果表明，ACCF-A对MB的最大吸附容量为400.0 mg / g，这表明ACCF-A作为从水中去除染料的有前途的吸附剂的潜力。该吸附剂在较宽的pH范围（6–12）范围内显示出快速的吸附动力学和高吸附能力。使用Langmuir，Freundlich，Temkin和Dubinin-Radushkevich模型拟合吸附数据。热力学结果表明，MB在ACCF-A上的吸附是自发的且放热的。拟一级动力学模型描述了MB吸附过程的良好拟合。颗粒内扩散模型表明，扩散不是吸附过程中唯一的限速步骤。所开发的吸附剂可成功再生多达八个连续周期，吸附能力仅损失2％。该吸附剂在较宽的pH范围（6–12）范围内显示出快速的吸附动力学和高吸附能力。使用Langmuir，Freundlich，Temkin和Dubinin-Radushkevich模型拟合吸附数据。热力学结果表明，MB在ACCF-A上的吸附是自发的且放热的。拟一级动力学模型描述了MB吸附过程的良好拟合。颗粒内扩散模型表明，扩散不是吸附过程中唯一的限速步骤。所开发的吸附剂可成功再生多达八个连续周期，吸附能力仅损失2％。该吸附剂在较宽的pH范围（6–12）范围内显示出快速的吸附动力学和高吸附能力。使用Langmuir，Freundlich，Temkin和Dubinin-Radushkevich模型拟合吸附数据。热力学结果表明，MB在ACCF-A上的吸附是自发的且放热的。拟一级动力学模型描述了MB吸附过程的良好拟合。颗粒内扩散模型表明，扩散不是吸附过程中唯一的限速步骤。所开发的吸附剂可成功再生多达八个连续周期，吸附能力仅损失2％。热力学结果表明，MB在ACCF-A上的吸附是自发的且放热的。拟一级动力学模型描述了MB吸附过程的良好拟合。颗粒内扩散模型表明，扩散不是吸附过程中唯一的限速步骤。所开发的吸附剂可成功再生多达八个连续周期，吸附能力仅损失2％。热力学结果表明，MB在ACCF-A上的吸附是自发的且放热的。拟一级动力学模型描述了MB吸附过程的良好拟合。颗粒内扩散模型表明，扩散不是吸附过程中唯一的限速步骤。所开发的吸附剂可成功再生多达八个连续周期，吸附能力仅损失2％。