| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation of Magnetic Y/CTS/FA Composite Adsorbents and Its Adsorption to Direct Lake Blue 5B |
| FENG Yanxia, LI Beigang
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| College of Chemistry and Environmental Sciences, Inner Mongolia Normal University, Hohhot 010022, China |
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Abstract Arare earth doped magnetic composite adsorbent, magnetic Y/CTS/FA was prepared by loading a small amount of chitosan (CTS), rare earth Y (Ⅲ) ions and Fe3O4 on the basis of solid waste fly ash (FA) from coal-fired power plant. The surface morphology and structure of FA and magnetic Y/CTS/FA were characterized by BET, SEM-EDS, XRD, FT-IR and XPS. Taking direct lake blue 5B (DLB 5B) with initial concentration of 2 300 mg/L as the adsorption object, the influence of raw material ratio and reaction conditions on the performance of composite adsorbent and the adsorption mechanism were explored in detail. The results showed that the optimal adsorption property of magnetic Y/CTS/FA to the DLB 5B was obtained with raw material mass ratio m(FA):m(Y (III)):m(CTS):m(Fe3O4)=10:2:2:2 at room temperature, where 2% CTS solution reacted with FA for 120 min to form the CTS/FA gel solution, then it reacted with the Y(III) ions for 30 min to form the Y/CTS/FA gels, Fe3O4 was added to form the final magnetic Y/CTS/FA at last, the adsorption capacity and removal rate of adsorbent to DLB 5B can reached 533 mg/g, 92.7%, respectively. The adsorption behavior of DLB 5B by the adsorbent is in accordance with Langmuir model. In addition, the results of FT-IR and XPS analysis of dye adsorbed by magnetic Y/CTS/FA before and after adsorption showed that the adsorbent to DLB 5B is mainly physical adsorption, and also has chemical adsorption. Magnetic Y/CTS/FA is a kind of environmental friendly adsorbent which has good purification effect on high concentration DLB 5B dye wastewater and can realize effective ash water separation.
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Published: 23 March 2021
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| Fund:National Natural Science Foundation of China (21167011), the Natural Science Foundation of Inner Mongolia Autonomous Region (2015MS0226), Independent Research and Development Project of Inner Mongolia Normal University (112129K18ZZYF006). |
About author:: Yanxia Feng, graduate student. Her research interests are preparation of biopolymer adsorbents and the application of dye wastewater treatment, published one paper.
Beigang Li, professor, supervisor of postgraduate. The director of the master's degree in the analytical chemistry of the College of Chemistry and Environmental Sciences of Inner Mongolia Normal University. Focusing on the research of analytical chemistry, environmental analytical chemistry, preparation of water environment materials and solid waste utilization and pollution control chemistry. |
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2021, Vol. 35 
