ACECR Institute of Higher Education (Isfahan Branch), Isfahan, 84175-443, Iran.
ACECR Institute of Higher Education (Isfahan Branch), Isfahan, 84175-443, Iran.
Int J Biol Macromol. 2018 Jul 15;114:244-255. doi: 10.1016/j.ijbiomac.2018.03.003. Epub 2018 Mar 15.
In this study, the removal of Methylene Blue dye was investigated by biocomposite beads synthesized from sodium alginate and wastes of oil extraction from almond peanut. Prepared biocomposite was characterized using X-ray diffraction, Infrared spectroscopy, scanning electron microscopy, Energy Dispersive X-Ray analysis. The adsorption capacities of Methylene Blue were investigated with respect to the effect of the adsorbent amount, pH value, and initial dye concentration. The kinetic adsorption data were analyzed by the pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion kinetic models. The equilibrium adsorption data were analyzed by Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models. The pseudo-second-order kinetic and Freundlich isotherm equations were found to describe the adsorption mechanism. The thermodynamic studies showed that the adsorption process is a spontaneous and exothermic process with increased entropy. The removal percentage and maximum adsorption capacity of Methylene Blue by biocomposite were equal to 90% and 22.8mg/g, respectively. The high registered capacities of Methylene Blue removal suggest the potential use of the biocomposite in the treatment of contaminated wastewaters.
在这项研究中，通过从海藻酸钠和杏仁花生油提取废物合成的生物复合材料珠来研究亚甲蓝染料的去除。使用 X 射线衍射、红外光谱、扫描电子显微镜和能量色散 X 射线分析对制备的生物复合材料进行了表征。研究了亚甲蓝的吸附容量，考察了吸附剂用量、pH 值和初始染料浓度的影响。通过拟一级、拟二级、Elovich 和内扩散动力学模型分析了动力学吸附数据。通过 Langmuir、Freundlich、Temkin 和 Dubinin-Radushkevich 等温线模型分析了平衡吸附数据。发现拟二级动力学和 Freundlich 等温线方程可以描述吸附机制。热力学研究表明，吸附过程是一个自发的、放热的过程，熵增加。生物复合材料对亚甲蓝的去除率和最大吸附容量分别为 90%和 22.8mg/g。亚甲蓝去除的高注册容量表明，该生物复合材料在处理受污染废水中具有潜在的应用价值。
