Adsorption of carmoisine A from wastewater using waste materials—Bottom ash and deoiled soya

Abstract

a b s t r a c tThe present study deals with the application of bottom ash, a power plant waste, and deoiled soya, an agricultural waste, for the adsorptive removal of carmoisine A dye from its aqueous solutions. This paper incorporates a comparative study of the adsorption characteristics of the dye on these effective adsorbents along with effects of time, temperature, concentration, and pH. Analytical techniques have been employed to find pore properties and characteristics of adsorbent materials. Batch adsorption studies, kinetic studies, and column operations have also been performed to understand the dye extraction ability of the adsorbents. The adsorption behavior of the dye has been studied using Freundlich, Langmuir, Tempkin, and Dubinin-Radushkevich adsorption isotherm models. The monolayer adsorption capacity determined from the Langmuir adsorption equation has been found as 1.78 Â 10 À5 and 5.62 Â 10 À5 mol g À1 at 323 K for bottom ash and deoiled soya, respectively. Kinetic measurements suggest the involvement of pseudo-second-order kinetics in both adsorptions and each case is controlled by a particle diffusion process. Column experiments demonstrated that both adsorbents could be practically utilized in elimination of hazardous dye from effluent and dye material can be recovered by eluting NaOH through the exhausted columns.

Pectin–cerium (IV) tungstate nanocomposite and its adsorptional activity for removal of methylene blue dye

“…This deviation from the origin was due to the variation of mass transfer in the initial and final stages of adsorption process. This confirms that adsorption of MB on PC/TW was a multistep process involving adsorption on the external surface and diffusion into the interior (Kumar and Kumaran 2005;Gupta et al 2009Gupta et al , 2010Gupta et al , 2011a.…”

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

“…Increasing pH value from 2.0 to 8.4 was observed to diminish the adsorption capacity, whereas the successive increase in pH value up to 12 no longer had a significant effect on the adsorption capacity. Gupta et al (2009) and Baseri et al (2012) presented comparable results on dye removal by activated carbon adsorption. Similar findings were reported by Gupta et al (2011) on chromium removal that there was a limit (pH 5) at which the pH could be increased to get maximum removal efficiency.…”

Isolation and characterization of an aerobic bacterial consortium able to degrade roxarsone

“…Among them, we can include heavy metals, dyes, pesticides, rubber chemicals and diverse industrial wastes and different approaches have been devised in order to reduce them. These strategies include, for example, adsorption to remove heavy metals or dyes (Jain et al 2003;Gupta et al 2006Gupta et al , 2007aGupta et al , 2009Gupta et al , 2010Gupta et al , 2011Mittal et al 2008), photochemical degradation (Gupta et al 2007b), biosorption (Mittal et al 2010) and advanced oxidation process (AOP) (Karthikeyan et al 2012).…”