期刊
PROCESSES
卷 7, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/pr7090565
关键词
magadiite; CTAB-Magadiite; rhodamine-B; adsorption process
资金
- Natural Science Foundation of Guangdong Province Project [2016A030313520]
- Key Laboratory of Polymeric Composite and Functional Materials of Ministry of Education Project [PCFM-2017-02]
- Guangdong Water Conservancy Science and Technology Innovation Project [2017-24]
- Guangdong Provincial Department of Education Featured Innovation Project [2017KTSCX007]
The result of an adsorption experiment indicated that the pure magadiite (MAG) and the modified MAG via cetyltrimethylammonium-bromide (CTAB-MAG) possessed pronounced affinity to the Rhodamine-B (Rh-B) dye molecules. CTAB-MAG was synthesized with an ion-exchange method between MAG and cetyltrimethylammonium-bromide (CTAB) in an aqueous solution. The adsorption capacities of CTAB-MAG and MAG on Rh-B were 67.19 mg/g and 48.13 mg/g, respectively; while the pH and the time were 7 and 60 min, respectively; however, the initial concentration of Rh-B was 100 mg/L, and adsorbent dosage was 1 g/L. Whereas, the adsorption capacity of CTAB-MAG was increased by 40% over MAG which indicated that CTAB-MAG can be used as an efficient low-cost adsorbent. Adsorption kinetics were consistent with the pseudo-second-order kinetic equation; the adsorption processes were dominated by film diffusion process which belonged to monomolecular layer adsorption.
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