Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil.
Civil Engineering Department, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil.
Environ Sci Pollut Res Int. 2021 Jan;28(1):405-415. doi: 10.1007/s11356-020-10521-9. Epub 2020 Aug 18.
The wastes from the macro-fungus Agaricus bisporus were used as an eco-friendly and low-cost adsorbent for the treatment of colored effluents containing the recalcitrant dyes, acid red 97 (AR97) and crystal violet (CV). The macro-fungal waste presented an amorphous structure, composed of particles with different sizes and shapes. Also, it presents typical functional chemical groups of proteins and carbohydrates with a point of zero charge of 4.6. The optimum conditions for the dosage were found to be as follows: 0.5 g L with an initial pH at 2.0 for the AR97 and 8.0 for the CV. From the kinetic test, it was found that it took 210 min and an adsorption capacity of 165 mg g for the AR97. Concerning the CV kinetics, it took 120 min to reach the equilibrium and it achieved an adsorption capacity of 165.9 mg g. The Elovich model was the most proper model for describing the experimental data, achieving an R ≥ 0.997 and MSE ≤ 36.98 (mg g). The isotherm curves were best represented by the Langmuir model, predicting maximum adsorption capacity of 372.69 and 228.74 mg g for the AR97 and CV, respectively. The process was spontaneous and favorable for both dyes. The ∆H values were 9.53 and 10.69 kJ mol for AR97 and CV, respectively, indicating physical and endothermic adsorption. Overall, the wastes from Agaricus bisporus have the potential to adsorb cationic and anionic dyes, thus solving environmental problems related to water quality and residue disposal.
双孢蘑菇菌渣作为一种环保且低成本的吸附剂，用于处理含有难处理染料酸性红 97（AR97）和结晶紫（CV）的有色废水。该大型真菌废料呈现无定形结构，由不同大小和形状的颗粒组成。此外，它具有蛋白质和碳水化合物的典型功能化学基团，零电荷点为 4.6。发现最佳剂量条件如下：对于 AR97，初始 pH 值为 2.0 时为 0.5 g/L；对于 CV，初始 pH 值为 8.0。从动力学测试中发现，对于 AR97，需要 210 分钟才能达到平衡，吸附容量为 165 mg/g。对于 CV 动力学，需要 120 分钟才能达到平衡，吸附容量为 165.9 mg/g。Elovich 模型是描述实验数据最恰当的模型，达到 R≥0.997 和 MSE≤36.98（mg/g）。等温线曲线最好由 Langmuir 模型表示，分别预测 AR97 和 CV 的最大吸附容量为 372.69 和 228.74 mg/g。该过程对于两种染料都是自发和有利的。AR97 和 CV 的 ∆H 值分别为 9.53 和 10.69 kJ/mol，表明是物理和吸热吸附。总体而言，双孢蘑菇菌渣具有吸附阳离子和阴离子染料的潜力，从而解决与水质和残渣处理有关的环境问题。
