Application of Sulfur-Modified Magnetic Nanoparticles for Cadmium Removal from Aqueous Solutions

Journal of Water and Environmental Nanotechnology

ARTICLE

Jafarinejad, Shahryar¹  Faraji, Mohammad²  Norouz, Zohreh¹  Mokhtari-Aliabad, Javad³ 

[1] Chemical Engineering Division, College of Environment;Faculty of Food Industry and Agriculture, Department of Food Science and Technology, Standard Research Institute (SRI);Department of Chemistry, Science and Research Branch, Islamic Azad University

关键词: Adsorption;    Cadmium;    Magnetic Nanoparticles (MNPs);    Removal;   

DOI  :  10.22090/jwent.2018.01.006

学科分类：数学（综合）

来源: Iranian Environmental Mutagen Society

【 摘 要 】

Even at low levels, heavy metals are toxic and can damage living things. They do not break down or decompose and tend to build up in plants, animals, and people causing health concerns. Magnetic nanoparticles (MNPs) can be considered as potential adsorbents for the removal of cadmium (Cd2+) from aqueous solutions because of their high surface area and the combined effect of adsorption and separation under external magnetic fields. In this study, a novel sulfur-modified magnetic nanoparticle was applied as an adsorbent for the removal of Cd2+ ions from aqueous solutions. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR) spectroscopy, and thermogravimetric analysis (TGA). The effects of pH, contact time, and initial concentration of Cd2+ on the removal efficiency of it were investigated in batch adsorption experiments. The equilibrium data fitted the Langmuir isotherm model better than the Freundlich isotherm model, and they were well explained in terms of pseudo-second-order kinetics. The maximum monolayer capacity qm and KL the Langmuir constant were calculated from the Langmuir as 5.1867 mg/g and 0.1562 L/mg, respectively.

【 授权许可】

CC BY