Trimellitated-sugarcane bagasse (STA) was used as an environmentally friendly adsorbent for removal of the basic dyes auramine-O (AO) and safranin-T (ST) from aqueous solutions at pH 4.5 and 7.0. Dye adsorption was evaluated as a function of STA dosage, agitation speed, solution pH, contact time, and initial dye concentration. Pseudo-first- and pseudo-second-order, Elovich, intraparticle diffusion, and Boyd models were used to model adsorption kinetics. Langmuir, Dubinin-Radushkevich, Redlich-Peterson, Sips, Hill-de Boer, and Fowler-Guggenheim models were used to model adsorption isotherms, while a Scatchard plot was used to evaluate the existence of different adsorption sites. Maximum adsorption capacities for removal of AO and ST were 1.005 and 0.638 mmol g⁻¹ at pH 4.5, and 1.734 and 1.230 mmol g⁻¹ at pH 7.0, respectively. Adsorption enthalpy changes obtained by isothermal titration calorimetry (ITC) ranged from −21.07 ± 0.25 to −7.19 ± 0.05 kJ mol⁻¹, indicating that both dyes interacted with STA by physisorption. Dye desorption efficiencies ranged from 41 to 51%, and re-adsorption efficiencies ranged from 66 to 87%, showing that STA can be reused in new adsorption cycles. ITC data combined with isotherm studies allowed clarification of adsorption interactions.

三熔蔗糖蔗渣（STA）用作环保型吸附剂，用于从pH 4.5和7.0的水溶液中去除碱性染料金胺-O（AO）和番红素-T（ST）。根据STA剂量，搅拌速度，溶液pH值，接触时间和初始染料浓度来评估染料的吸附。伪一阶和伪二阶，Elovich，粒子内扩散和Boyd模型用于模拟吸附动力学。Langmuir，Dubinin-Radushkevich，Redlich-Peterson，Sips，Hill-de Boer和Fowler-Guggenheim模型用于模拟吸附等温线，而Scatchard图用于评估不同吸附点的存在。在pH 4.5时，去除AO和ST的最大吸附容量分别为1.005和0.638 mmol g ^-1，以及1.734和1.230 mmol g分别在pH 7.0下为^-1。通过等温滴定热法（ITC）获得的吸附焓变化范围为-21.07±0.25至-7.19±0.05 kJ mol ^-1，表明这两种染料均通过物理吸附与STA相互作用。染料的解吸效率在41％到51％之间，再吸附效率在66％到87％之间，表明STA可以在新的吸附循环中重复使用。ITC数据与等温线研究相结合，可以阐明吸附相互作用。