Adsorption kinetics of Rhodamine-B on used black tea leaves

Abstract

Rhodamine B (Rh-B) is one of the most common pollutants in the effluents of textile industries effluents in developing countries. This study was carried out to evaluate the applicability of used black tea leaves (UBTL) for the adsorptive removal of Rh-B from aqueous system by investigating the adsorption kinetics in batch process. The effects of concentration and temperature on adsorption kinetics were examined. First-, second- and pseudo-second order kinetic equations were used to investigate the adsorption mechanism. The adsorption of Rh-B on UBTL followed pseudo-second order kinetics. The equilibrium amount adsorbed and the equilibrium concentration were calculated from pseudo-second-order kinetic plots for different initial concentrations of Rh-B to construct the adsorption isotherm. The adsorption isotherm was well expressed by Langmuir equation. The maximum adsorption capacity of UBTL to Rh-B was found to be 53.2 mg/g at pH = 2.0. The equilibrium amount adsorbed, calculated from pseudo-second-order kinetic plots, increased with temperature increase. The positive value of enthalpy of adsorption, ΔHads = 31.22 kJ/mol, suggested that the adsorption of Rh-B on UBTL at pH = 2.0 is an endothermic process.

Rhodamine B dye sequestration using Gmelina aborea leaf powder

“…it is established to be harmful when swallowed, with acute oral toxicity, causes serious eye damage or irritation, hazardous to the aquatic environment with long-term effect [58,59,60]. Adsorption method using different adsorbents has been used severally for removing RhB dye from aqueous solution [59,60,61,62,63,64,65 [77,78,79,80,81,82,83,84,85,86,87,88,89]. This study is aimed at preparing, characterizing and applying Gmelina aborea leaf (GAL) activated carbon as adsorbent for the removal of RhB dye from aqueous solutions and to study the isotherm, kinetic and thermodynamic parameters governing the adsorption process.…”

An Evaluation of the Removal of Progesterone in Wastewater by Adsorption onto Waste Tea Leaves

“…Tea leaves comprise of cellulose and lignin materials that could adsorb EDCs in aqueous medium [18,19]. The surface morphology of tea leaves shows its porosity and rough surface with pores of different sizes which enhances the adsorption of organics [20].…”

Investigation of the sorption characteristics of water lettuce (WL) as a potential low-cost biosorbent for the removal of methyl violet 2B

“…Recently, the search for alternative technologies for the removal of environmental pollutants from wastewater has been focused on biosorption which is based on the binding capacities of biosorbents. These biosorbents include fruit waste [5][6][7][8], peat [9][10][11][12][13], almond shell [14], pomegranate residual-based activated carbon [15], fungi [16], [17], and acid-modified wheat bran [18]. The major advantages of biosorption over conventional treatment methods are low cost, high efficiency, minimization of chemical and biological sludge, and regeneration of biosorbent [19].…”