Journal
JOURNAL OF CENTRAL SOUTH UNIVERSITY
Volume 28, Issue 12, Pages 3666-3680Publisher
JOURNAL OF CENTRAL SOUTH UNIV
DOI: 10.1007/s11771-021-4845-0
Keywords
Fe3O4@CD magnetic microspheres; adsorption removal; basic fuchsin
Categories
Funding
- National Key R&D Program of China [2017YFC1600306]
- National Natural Science Foundation of China [21505005]
- Hunan Provincial Natural Science Foundation, China [2018JJ2424]
- International Cooperative Project for Double First-Class, China [2019IC21]
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A magnetic absorbent, Fe3O4@CD, prepared in this study showed efficient adsorption and removal of BF dye from wastewater, demonstrating promising application prospects in the treatment of dye wastewater.
Excessive discharge of dye wastewater has brought serious harm to human health and the environment. In this paper, a magnetic absorbent, ferroferric oxide@beta-cyclodextrin (Fe3O4@CD), was prepared for the efficient adsorption removal of basic fuchsin (BF) from dye wastewater, based on the special amphiphilicity of beta-CD and the strong magnetism of Fe3O4. A series of influence factors including the initial dye concentration, adsorbent dosage, temperature and pH were investigated, as well as the adsorption mechanism. The results show that Fe3O4@CD has the best adsorption and removal effect on BF dye at room temperature and neutral pH, when the initial concentration of dye is 25 mg/L and the adsorbent dosage is 100 mg. The adsorption behavior conforms to the pseudo-second-order kinetics and the Langmuir adsorption isotherm, and the adsorption process is spontaneously endothermic. Fe3O4@CD adsorbed with BF dye can be rapidly separated under an external magnetic field and then easily regenerated by HCl treatment. After 5 times of recycling, the removal rate of the prepared magnetic composite on BF dye is kept above 75%. This work will provide an economic and eco-friendly technology for the treatment of the actual dye wastewater.
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