Poormand Hamid, Leili Mostafa, Khazaei Marzieh
Department of Environmental Health Engineering, Students Research Center, Hamadan University of Medical Sciences, Hamadan, Iran and School of Public Health, Hamadan University of Medical Sciences, Shahid Fahmideh Avenue, P.O. Box 65175-417, Hamadan, Iran E-mail:
Young Researchers and Elite Club, Qom Branch, Islamic Azad University, Qom, Iran and Department of Chemical Engineering, Faculty of Chemistry, Bu-Ali Sina University, P.O. Box 6517838695, Hamadan, Iran.
Water Sci Technol. 2017 Jan;75(2):281-295. doi: 10.2166/wst.2016.510.
In this research, aluminum-based drinking water treatment sludge is used as a starting material and immobilized by sodium alginate to develop low cost adsorbent for the removal of methylene blue (MB) from aqueous solutions. The studied variables included pH, adsorbent dose, initial MB concentration and contact time. Characteristics of the adsorbent were also studied using scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR). It was revealed from kinetic tests that removal efficiency of MB was 88.5% under the optimum conditions of pH 8, initial MB concentration of 50 mg/L, contact time of 60 min, and adsorbent dose of 0.3 g/L. The oxygen functional groups such as -OH, C-O-C and C=O were found on the surface of developed adsorbent by FTIR. In addition, the adsorption data fitted well the Langmuir adsorption model with the maximum sorption capacity of 909.1 mg/g, and followed the pseudo-second-order kinetics. Findings of this study indicate that the prepared adsorbent is promising for further development of an effective and economical adsorbent material in the near future.
在本研究中，以铝基饮用水处理污泥为原料，用海藻酸钠进行固定化处理，以制备用于从水溶液中去除亚甲基蓝（MB）的低成本吸附剂。所研究的变量包括pH值、吸附剂剂量、初始MB浓度和接触时间。还使用扫描电子显微镜和傅里叶变换红外光谱（FTIR）对吸附剂的特性进行了研究。动力学测试表明，在pH值为8、初始MB浓度为50 mg/L、接触时间为60分钟、吸附剂剂量为0.3 g/L的最佳条件下，MB的去除效率为88.5%。通过FTIR在开发的吸附剂表面发现了-OH、C-O-C和C=O等氧官能团。此外，吸附数据很好地拟合了Langmuir吸附模型，最大吸附容量为909.1 mg/g，并遵循准二级动力学。本研究结果表明，所制备的吸附剂在不久的将来有望进一步开发成为一种有效且经济的吸附材料。
