Biosorption of carbaryl from aqueous solution onto Pistia stratiotes biomass

Abstract

In this work, adsorption of carbaryl from aqueous solution on Pistia stratiotes biomass was investigated. The effects of operating parameters such as initial concentration, pH, adsorbent dose and contact time on the adsorption of carbaryl were analyzed using response surface methodology. The proposed quadratic model for central composite design fitted very well to the experimental data that it could be used to navigate the design space according to analysis of variance results. Response surface plots were used to determine the interaction effects of main factors and optimum conditions of the process. The optimum adsorption conditions were found to be initial carbaryl concentration = 15.57 mg L-1 , pH 2.01, adsorbent dose = 0.72 g and contact time = 30 min. The Langmuir, Freundlich and Temkin isotherm models were applied to the equilibrium data. The maximum biosorption capacity of P. stratiotes biomass for carbaryl was found to be 3.1 mg g-1. The pseudo-second-order kinetic model described the carbaryl biosorption process with a good fitting.

Optimizing adsorption of fluoride from water by modified banana peel dust using response surface modelling approach

“…To overcome this particular problem a statistical experimental design approach was introduced. Recently, several types of experimental methods have been employed in multivariate chemical process optimization Chattoraj et al 2014).…”

Modelization and Statistical Optimization of Coagulation–Flocculation Treatment of an Old Leachate

“…where b 0 is the constant coefficient; b i , b ij , and b ii are the regression coefficients of linear, interaction, and quadratic term, respectively; k the number of factors; Y is the predicted response; x i and x j are independent factors in coded units and e is the error term (Chattoraj et al, 2014). The quality of the fit polynomial model was expressed by the coefficient of determination R 2 and its statistical significance was checked by the Fisher's F-test in the same program (Ghafari et al, 2009).…”

Optimization of Adsorption Parameters for Removal of Carbaryl Insecticide Using Neem Bark Dust by Response Surface Methodology

“…Among these conventional methods for the removal of pesticides, adsorption technique is found to be the most economical, effective, highly flexible in design, and simple as well as offers scope for regeneration of adsorbent materials [3]. Therefore, adsorption technique has drawn wide attention of the investigators for the removal of pesticides from contaminated water samples [16][17][18][19][20]. In this perspective, intense research interest has been generated for exploring cost-effective, ecofriendly, and easily available adsorbent particularly of biological origin [16][17][18][19][20][21][22][23].…”

“…The various adsorbents like Porogen-treated banana pith carbon [26], different soils [23,27,28], clay [29], Pistia stratiotes biomass [16], and Lemna major biomass [23] were used to achieve effective removal of carbaryl from aqueous medium.…”

“…In most of the adsorption studies, the effects of individual parameters on the adsorption process have been investigated by keeping the level of other operating factors constant [16,22]. In those cases, to establish the optimum levels, a large number of variable experiments were required to be executed [36].…”