期刊名称：International Journal of Sustainable Engineering
印刷版ISSN：1939-7038
出版年度：2019
卷号：12
期号：2
页码：131-140
DOI：10.1080/19397038.2018.1547330
语种：English
出版社：Taylor & Francis Group
摘要：ABSTRACTThis study describes experiments in which MIL-100(Fe) was used to remove Co2+ions from the waste water. The synthesised adsorbent was characterised by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, Brunauer–Emmett–Teller (BET) and scanning electron microscope. Statistical analysis was used to investigate the effects of different parameters. From the obtained results, the removal efficiency was enhanced with increasing contact time and pH but decreased with increasing cobalt initial concentration. The maximum removal efficiency of Co+2was 93.4% under optimum conditions. The equilibrium adsorption data were best fitted to linearly transformed Freundlich isotherm. Adsorption kinetic data followed the pseudo second-order kinetic model. The maximum adsorption capacity of Co+2on to the MIL-100(Fe) was found to be 119 mg g−1. The results showed that ∆G of adsorption was negative, while ∆H was positive which showed that the adsorption process was spontaneous and endothermic. The positive value of ∆Sshowed that disordering and randomness increased at the solid–solution interface of cobalt ions with MIL-100(Fe) particles.
