Paddle cactus (Tacinga palmadora) as potential low-cost adsorbent to treat textile effluents containing crystal violet |
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Authors: | Jordana Georgin Dison S P Franco Fernanda C Drumm Patrícia Grassi Matias Schadeck Netto Daniel Allasia |
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Affiliation: | Chemical Engineering Department, Federal University of Santa Maria, Santa Maria, Brazil |
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Abstract: | AbstractThe powdered biomass of paddle cactus (Tacinga palmadora), a rustic plant of great occurrence in the driest regions of Brazil, was evaluated as a low-cost adsorbent to treat textile effluents containing crystal violet (CV) dye. The powdered paddle cactus (PPC) was mainly composed by lignin and holocellulose, as well as, a variety of functional groups. Best results for CV adsorption were found using an adsorbent dosage of 0.5?g L?1 at solution pH equivalent to 10.0. Fast adsorption kinetics was verified, being the equilibrium reached within 100?min, and the curves were well modeled by the pseudo-first-order model. The isotherms were well-represented by the Langmuir model. The maximum adsorption capacity was 228.74?mg g?1 at 328?K. The estimated thermodynamics parameters were ΔG0T?=?328K of –9.08?kJ mol?1, ΔH0 of 12.44?kJ mol?1, and ΔS0 of 0.065?kJ mol?1 K?1. In addition, PPC was able to treat a simulated textile effluent containing organic and inorganic compounds, reaching 93% of color removal efficiency. These findings show that powdered paddle cactus can be applied as potential low-cost adsorbent to treat textile effluents containing CV. |
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Keywords: | Adsorption Biomass Crystal violet Dyes Low-cost Tacinga palmadora |
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