Adsorption of Basic Violet 16 dye from aqueous solution onto mucilaginous seeds of Salvia sclarea: kinetics and isotherms studies

Abstract

a b s t r a c tThe Salvia sclarea seeds (SSS) were used as adsorbent for the removal of Basic Violet 16 (BV 16) dye from aqueous solutions. The structure and surface characteristics of the SSS were investigated by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller and pH point of zero charge (pH pzc ) procedures. The effect of SSS dosage, pH of the solution, contact time and initial concentration of BV 16 dye on its removal was elucidated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin isotherm models. The adsorption isotherm data were fitted well to Langmuir isotherm and the monolayer adsorption capacity was found to be 19.80 mg/g. The kinetic data obtained at different concentrations have been analyzed using a pseudo-first-order, pseudo-second-order equation. The kinetic studies showed that the pseudo-second-order kinetic model better described the adsorption of BV 16 dye onto the SSS. The findings reveal the feasibility of the SSS to be used as a potential and low-cost adsorbent in water and waste water industry for the removal of various pollutants, more specifically cationic dyes.

Adsorption Characteristics of Chitosan-Modified Bamboo Biochar in Cd(II) Contaminated Water

“…e adsorption kinetics of Cd(II) was studied in Cd(II) contaminated water using the Langmuir and Freundlich isotherm models (3) and ( 4), where C e (mg/L) is the equilibrium concentration, Q m (mg/g) denotes the maximum adsorption capacity, Q e (mg/g) represents the Cd(II) adsorbed amount at the equilibrium concentration, K L (mg/g) and K F (mg/g) are Langmuir and Freundlich isotherm constants, respectively, and 1/n relates to the adsorption capacity [31][32][33][34].…”

A Novel Green Synthesis of Zero Valent Iron Nanoparticles (Nzvi) using Walnut Green Skin Characterization, Catalytic Degradation and Toxicity Studies

“…5. and [36]. In addition, the speci c surface area of the commercial iron powder has been reported at 0.9 [34].…”

Synthesis of adsorbents from wheat hulls, extracted cellulose and modified with Cetyl trimethyl ammonium chloride to remove Congo Red in aqueous solution

“…The point at which the bioadsorbents exhibit zero net charge was determined using the pHPZc (Afshin et al, 2019). Table 1 summarizes the results for the bioadsorbents under study.…”