Punica granatum Shell Preparation, Characterization, and Use for Crystal Violet Removal from Aqueous Solution

Abstract

Punica granatum shell (PGS), a solid waste, was prepared and characterized by point of zero charge measurement, Fourier transform infrared spectroscopy, scanning electron microscopy, N2 adsorption–desorption curves, and Boehm titration technique. The ability of PGS biosorbent to remove a basic dye, crystal violet (CV), from aqueous solutions by batch mode was investigated. The effects of pH, biosorbent dosage, contact time, and initial dye concentration on the biosorption capacity were studied. CV uptake was favorable at pH values ranging from 5 to 10. The contact time required to obtain the maximum biosorption was 2 h at 298 K using 0.6 g of biosorbent. The nonlinear pseudo‐second order kinetic model provided a best fit to experimental data when compared to pseudo‐first order and Elovich kinetic models. The equilibrium biosorption isotherm was studied according to nonlinear Langmuir, Freundlich, and Redlich–Peterson isotherm models. Regeneration of PGS was obtained using acetic acid as eluent. This study demonstrated that PGS is an effective low‐cost biosorbent for the removal of CV from aqueous solutions.

Avocado seed powder: characterization and its application for crystal violet dye removal from aqueous solutions

“…Activated carbons have been widely used for treatment of industrial wastewaters [17,18], but the usage of activated carbons has some limitations such as the cost of producing activated carbon, industrial scale application, regeneration difficulty and reduction in adsorption efficiency of regenerated activated carbon [19,20]. Attention has been shifted to the usage of eco-friendly and low-cost materials [21,22]. These materials possess high carbon content, but low inorganic content.…”

“…Crystal violet (CV) is used to add color to paper, and it is a component of inks for printing and pens [21]. Also, it is used to add color to products such as fertilizers, anti-freezes, detergents, and leather [22].…”

“…These materials possess high carbon content, but low inorganic content. They are obtainable from variety of agricultural by-products that are cheap, abundant, and nontoxic [1,15,21,22] and can be utilized as alternative biosorbents for the removal of several dyes from aqueous solutions.…”

“…CV is used as histological stain, particularly in Gram's method for classifying bacteria [21,22]. Due to its usage in different industrial applications, various adsorbents have been used to remove CV from aqueous solutions [21,22,[25][26][27][28][29][30][31][32][33][34].…”

Produção De Carvão Ativado a Partir De Lodo De Esgoto Doméstico E Sua Aplicação Na Adsorção Do Corante Preto Remazol 5 Em Solução Aquosa

“…Figura 4 -Influência da massa na adsorção do corante RB-5 O aumento na porcentagem da remoção do RB-5 com até 50,0 mg de CA pode ser atribuído ao aumento da quantidade de sítios ativos disponíveis para adsorção, já reportando em vários trabalhos (SILVEIRA et al, 2014;CARDOSO et al, 2011a;ROYER et al,2010).…”