期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 26, 期 28, 页码 28584-28592出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-3587-5
关键词
Textile; Dye adsorption; Methylene blue; Piacava; Equilibrium; Simulated effluent
资金
- CAPES (Brazilian Agency for Improvement of Graduate Personnel)
- CNPq (National Council of Science and Technological Development)
This research was conducted to evaluate the methylene blue dye adsorption by piacava fibers. The effects of adsorbent amount, pH, kinetics, equilibrium, and thermodynamics were analyzed, as well as the adsorbent performance in the treatment of synthetic textile effluents. The adsorbent characterization was also performed. Experimental kinetic data were fitted with pseudo-first-order, pseudo-second-order, and Elovich models. The equilibrium tests were done at 298, 308, and 318 K, and the models of Freundlich, Langmuir, Redlich-Peterson, and Sips were used. The adsorption was favored using 0.025 g of adsorbent, pH 10, and 318 K. The Elovich model provided better fit to kinetic data. The equilibrium experimental points were well represented by the Sips model. The maximum experimental adsorption capacity of methylene blue dye was 427.3 mg g(-1). It was verified a spontaneous, favorable, and endothermic adsorption. Piacava fiber was a promising low-cost material to be used for color removal in effluents containing methylene blue.
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