Faculty of Engineering and Architecture (FEAR), Postgraduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
Faculty of Engineering and Architecture (FEAR), Chemical Engineering Course, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
Environ Sci Pollut Res Int. 2022 Nov;29(53):79830-79840. doi: 10.1007/s11356-021-17502-6. Epub 2021 Nov 27.
The purpose of this research is to evaluate the use of leather shave waste activated carbon (ACLW) as an alternative for the treatment of wastewater containing linear alkylbenzene sulfonate (LAS). Batch adsorption tests were carried out (pH effect, isotherms, kinetics). The activated carbon was tested for its life cycle by desorption with solvent and it was further evaluated as real wastewater treatment for bath graywater. Under the optimum pH of 2.5, kinetic studies showed a better correlation with the pseudo-second order model, with an activation energy of 27.5 kJ mol. Equilibrium isotherms correlated better with the double layer model, indicating hemi-micelle formation and performing a high-affinity isotherm. Adsorption was shown to be endothermic (∆H = + 73.89 kJ mol), entropy driven (∆S = + 0.46 kJ mol K), and occurring spontaneously. The use of ethanol solution was effective for the regeneration of the adsorbent. Adsorption was applied in real wastewater, removing contaminants from bath graywater, especially anionic surfactants with up to 95% removal efficiency.
本研究旨在评估皮革削屑废活性炭 (ACLW) 作为处理含有直链烷基苯磺酸盐 (LAS) 的废水的替代物的用途。进行了批量吸附试验 (pH 效应、等温线、动力学)。通过溶剂解吸对活性炭进行了生命周期测试，并进一步评估了其作为洗浴灰水实际废水处理的用途。在最佳 pH 值 2.5 下，动力学研究与准二级模型更好地相关，活化能为 27.5 kJ mol。平衡等温线与双层模型更好地相关，表明形成了半胶束，表现出高亲和力的等温线。吸附被证明是吸热的 (∆H = +73.89 kJ mol)，熵驱动的 (∆S = +0.46 kJ mol K)，并自发发生。乙醇溶液的使用对吸附剂的再生是有效的。吸附被应用于实际废水，去除洗浴灰水中的污染物，特别是阴离子表面活性剂，去除效率高达 95%。
