期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 420, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126644
关键词
Adsorption; Hazardous dyes; Carbon nanotubes; Central composites design; Tungsten disulfide
资金
- Yasuj University of Medical Sciences, Yasuj, Iran
The magnetic tungsten disulfide/carbon nanotubes nanocomposite showed high efficiency in the ultrasound-assisted removal of dyes, with maximum adsorption capacities of 174.8 mg g-1 and 166.7 mg g-1 for AM and BB FCF, respectively. The adsorption process was described by Langmuir isotherm and pseudo-second-order kinetic models, with thermodynamic study indicating endothermic and spontaneous adsorption of dyes.
In this research, the potentiality of magnetic tungsten disulfide/carbon nanotubes nanocomposite (WS2/Fe3O4/ CNTs-NC) as an adsorbent for the ultrasound-assisted removal of amaranth (AM) and brilliant blue FCF (BB FCF) dyes was investigated. The experiments were conducted using a central composite design (CCD) with the inputs of solution pH (X1: 2.0-10), adsorbent mass (X4: 4-20 mg), AM concentration (X2: 10-50 mg L-1), BB FCF concentration (X3: 10-50 mg L-1), and sonication time (X5: 2-12 min). At the optimum conditions, the removal percentages of 99.30% and 98.50% were obtained for AM and BB FCF, respectively. The adsorption of the dyes was described by Langmuir isotherm and pseudo-second-order (PSO) kinetic models. The maximum adsorption capacities of AM and BB FCF were 174.8 mg g-1 and 166.7 mg g-1, respectively. The adsorption thermodynamic study showed that the adsorption of the dyes occurred endothermically and spontaneously. The removal percentages of AM and BB FCF from the real samples were in the range of 94.52-99.65% for the binary solutions. The removal percentage for each dye after five cycles of adsorption/desorption was > 90%. This work provides a useful insight to the potential application of CNTs-based magnetic nanocomposite for the treatment of wastewaters contaminated with dyes.
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