Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5157855 | Carbohydrate Polymers | 2017 | 32 Pages |
Abstract
Fe3O4@SiO2-Chitosan/GO (MSCG) nanocomposite was investigated by various techniques (SEM, TEM, XRD, VSM, FT-IR, XPS) for the removal of tetracycline (TC). Effects of pH, zeta potential and initial contaminant concentration were studied in detail. Four background cations (Na+, K+, Ca2+ and Mg2+) with a concentration of 0.01Â M showed little influence on the TC adsorption at the studied pH range while the divalent heavy metal cation Cu(II) could significantly enhance the adsorption. The results indicated that the highest adsorption capacity of TC were 183.47Â mmol/kg and 67.57Â mmol/kg on MSCG with and without Cu(II), respectively. According to mechanism investigation for the adsorption of TC by pH impact study and XPS analysis, besides electrostatic interaction and Ï-Ï interactions, the Cu(II) also acts as a bridge between TC and MSCG, which significantly improve the adsorption of TC. This study provided valuable guidance and effective method for the removal of TC from aquatic environments.
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Authors
Binyan Huang, Yunguo Liu, Bin Li, Shaobo Liu, Guangming Zeng, Zhiwei Zeng, Xiaohua Wang, Qimeng Ning, Bohong Zheng, Chunping Yang,