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Eragrostis plana Nees as a novel eco-friendly adsorbent for removal of crystal violet from aqueous solutions
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Eragrostis plana Nees as a novel eco-friendly adsorbent for removal of crystal violet from aqueous solutions
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Eragrostis plana Nees as a novel eco-friendly adsorbent for removal of crystal violet from aqueous solutions
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Journal Article
Eragrostis plana Nees as a novel eco-friendly adsorbent for removal of crystal violet from aqueous solutions
2017
Overview
Eragrostis plana
Nees (EPN) was used as new and eco-friendly adsorbent for the removal of crystal violet dye (CV) from aqueous solution. Specific surface area (BET), scanning electron microscopy (SEM), infrared spectroscopy (ATR–FTIR), point of zero charge (pH
PZC
), and modified Boehm titration method were used to characterize the EPN material. The effects of initial pH of solution, adsorbent mass, contact time and initial dye concentration, and temperature were studied in batch adsorption mode. Kinetic data were evaluated by pseudo-first-order and pseudo-second-order models. The result exhibited that pseudo-second-order model well described the adsorption kinetics of CV onto EPN. Langmuir, Freundlich, and Sips isotherm models were used for analysis of the isothermal data. The equilibrium data of adsorption of CV onto EPN was better fitted with the Sips isotherm. Based on the Sips isotherm model, the maximum adsorption capacity was 76.20 ± 1.20 mg g
−1
at 333 K. A high desorption of CV from EPN was obtained using 1.00 mol L
−1
of CH
3
COOH as eluent. The thermodynamic data indicated that the adsorption was spontaneous, endothermic, and physical process. EPN can be used as alternative adsorbent to remove CV from aqueous solution.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
