High performance adsorption of hazardous triphenylmethane dye-crystal violet onto calcinated waste mussel shells

Abstract

Synthetic dyes are harmful to human beings, and the removal of colour from process or waste effluents is environmentally important. Crystal violet (CV) is a typical triphenylmethane dye, which is widely used in textile dyeing and paper printing industries. The present study shows that granulated and calcinated waste mussell shells (CWMS) can be used as a potential low-cost and locally available adsorbent for the removal of CV from aqueous solutions. The adsorption capacities of the CWMS for CV were investigated with respect to the effect of pH value, adsorbent dosage, contact time, initial dye concentration and temperature. Process variables were optimized, and a maximum dye adsorption of 482.0 mg/g was achieved at pH 6, 0.2 g/L adsorbent dosage, 220 min contact time and 25 °C for dye initial concentration of 100 mg/L. Adsorption kinetics and isotherms were followed by the pseudo-second order model and Freundlich isotherm models, respectively. Thermodynamic parameters demonstrated that adsorption of CV was spontaneous and endothermic in nature. The results indicated that the CWMS as a new adsorbent had the potential to serve in wastewater treatment applications, especially in the removal of CV from aqueous solutions.

Adsorptive Removal of Basic Dyes and Hexavalent Chromium from Synthetic Industrial Effluent: Adsorbent Screening, Kinetic and Thermodynamic Studies

“…Hence, the feasibility of the process depend mainly on the increase in entropy during adsorption. Similar trends in thermodynamics have also been observed for the adsorption of CV onto calcinated waste mussel shells [42], MG onto waste pea shells [43] and Cr(VI) onto activated carbon [44].…”

Impacts of freshwater mussels on planktonic communities and water quality

“…They anticipated that by combining these proteins with their specific structure, would facilitate the elimination of the dye and heavy metals. Dandil et al [ 23 ] also examined that calcined waste mussels shells act as adsorbents to remove the dye. This result has confirmed that the presence of FMs in water bodies has significant importance for removing dyes from waste or polluted water.…”

A new valorization of faba bean waste: Fabrication of a low-cost adsorbent for efficient removal dyes from textile wastewater

“…9. This can be attributed to the aggregation or overlapping of adsorption sites, which reduces the overall adsorption surface area available for the dye and increases the diffusion path length [40][41][42].…”