Amina Ben Bouabdallah, Fadia Mazari, Roumeissa Sifi
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引用次数: 0
摘要
本研究的目的是评估天然吸附剂草叶草(Oxalis pe -caprae L.)对纺织废水中偶氮染料索苯基红3BL (SR 3BL)的吸附潜力。采用傅里叶变换红外光谱(FTIR)和扫描电镜(SEM)对吸附剂进行了表征。研究了各参数对吸附效率的影响。在接触时间为35 min、pH为6、温度为25℃的条件下，获得了最佳效果。平衡实验数据用Langmuir、Freundlich和Temkin模型拟合。实验数据与Langmuir等温线一致，表明单层吸附。采用拟一级、拟二级和Elovich动力学模型对吸附动力学进行了评价。吸附动力学符合准一级动力学模型。热力学研究表明，吸附过程是自发的、放热的。
Removal of Solophenyl Red 3BL Dye from Textile Effluents by Adsorption Using a Natural Adsorbent Oxalis pes-caprae L.
The aim of the present study was to assess the adsorption potential of a natural adsorbent Oxalis pes-caprae L. for the removal of azo-dye solophenyl red 3BL (SR 3BL) from textile effluents. The adsorbent was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effect of various parameters on the efficiency of the adsorption was studied. The optimum was found with the contact time of 35 minutes, pH of 6, and temperature of 25 °C. The equilibrium experimental data were fitted with the Langmuir, Freundlich, and Temkin models. Experimental data were well described with the Langmuir isotherm indicating monolayer adsorption. Pseudo-first-order, pseudo-second-order, and Elovich kinetic models were used to evaluate the adsorption kinetics. The adsorption kinetics was found to follow closely the pseudo-first-order kinetic model. Thermodynamics studies revealed that the adsorption process was spontaneous and exothermic.
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