A novel sugarcane bagasse–bentonite/sodium alginate (SCB–Ben/SA) composite aerogel was prepared as an effective green adsorbent via blending–cross-linking for the removal of crystal violet (CV) dye from aqueous solution. The equilibrium adsorption capacity of SCB–Ben/SA for CV was 839.9 mg/g at 0.8 mg/mL adsorbent dosage, temperature 303 K, pH 4, and 800 mg/L initial CV concentration, and presented a removal rate of 85%. Adsorption kinetics studied using the novel pseudo-first-order and pseudo-second-order (PFO–PSO) combined model showed that CV adsorption by SCB–Ben/SA was a complex process and did not include a single mechanism, but involved both chemical and physical adsorption reactions; however, chemisorption was the dominant kinetic mechanism. The dynamic characteristics of CV adsorption process achieved through the liquid film around SCB–Ben/SA and the pores inside SCB–Ben/SA was described satisfactorily and conveniently using the novel film–pore mass transfer (FPMT) model. A multilayer adsorption model was applied to further understand the CV adsorption behaviour of SCB–Ben/SA. The number of linked CV molecules per functional group varied from 0.53 to 0.63 for SCB–Ben/SA. The CV molecules were adsorbed on SCB–Ben/SA via mixed orientation. The adsorption isotherms and thermodynamics revealed that the multilayer adsorption process was endothermic and spontaneous. Overall, SCB–Ben/SA was found to be an efficient, low-cost, green, and recyclable adsorbent for organic dye removal.

通过共混-交联制备了一种新型甘蔗渣-膨润土/海藻酸钠（SCB-Ben/SA）复合气凝胶作为一种有效的绿色吸附剂，用于去除水溶液中的结晶紫（CV）染料。在 0.8 mg/mL 吸附剂用量、温度 303 K、pH 4 和 800 mg/L 初始 CV 浓度下，SCB-Ben/SA 对 CV 的平衡吸附容量为 839.9 mg/g，去除率为 85%。使用新的准一级和准二级 (PFO-PSO) 组合模型研究的吸附动力学表明，SCB-Ben/SA 的 CV 吸附是一个复杂的过程，不包括单一机制，但同时涉及化学和物理吸附反应；然而，化学吸附是主要的动力学机制。使用新型膜-孔传质 (FPMT) 模型令人满意且方便地描述了通过 SCB-Ben/SA 周围的液膜和 SCB-Ben/SA 内部的孔实现的 CV 吸附过程的动态特性。应用多层吸附模型进一步了解 SCB-Ben/SA 的 CV 吸附行为。对于 SCB-Ben/SA，每个官能团的连接 CV 分子数从 0.53 到 0.63 不等。CV 分子通过混合取向吸附在 SCB-Ben/SA 上。吸附等温线和热力学表明多层吸附过程是吸热和自发的。总的来说，SCB-Ben/SA 被发现是一种高效、低成本、绿色和可回收的有机染料去除吸附剂。