Removal of Carbaryl Pesticide from Aqueous Solution by Adsorption on Local Clay in Agadir

Abstract

This study was conducted to assess the removal efficiency of pesticide (Carbaryl) used in Souss Massa region (Agadir city), on a clay originated from barrage situated in Agadir. The adsorption of Carbaryl from aqueous solution by local clay as a low-cost, natural and eco-friendly adsorbent was investigated. Different physicochemical parameters were analyzed: adsorbent mass, ionic strength (NaNO 3 ), initial concentration of pollutant, temperature, and pH. The empirical results showed that all these parameters have an impact on the retention of pesticide on the clay. The equilibrium uptake was increased with an increase in the initial pesticide concentration in solution. The results of adsorption were fitted to the Langmuir and Freundlich isotherms. The Freundlich model represented the adsorption process better than Langmuir model, with correlation coefficients (R 2 ) values ranged from 0.97 to 0.99. This study has shown that the natural clay is a solid that has got an important adsorption capacity, which may be used in treatment and depollution of water.

Pulse polarographic investigations of adsorption study and leaching of carbaryl on five soils to evaluate groundwater contamination

“…Pesticide adsorption by soil is a naturally occurring phenomenon which affect processes like toxicity, mobility, persistence and volatilization of a pesticide and which in turn affect the ground and surface water contamination. The frequent detection of pesticides including carbaryl in surface and ground water has led to some experimental studies on their adsorption on soils for evaluation of their leaching potential [1,2]. The present study dealing with the adsorption of carbaryl on five soils with different characteristics is also a useful contribution in this direction.…”

Removal of Anionic Dye by Natural Algerian Montmorillonite

“…In contrast, at a high pH solution the capacity of dye removal will decrease for anionic dye adsorption [21]. Because when the pH of dye solution is increased the surface tends to acquire negative charge, thereby resulting in a decreased adsorption of dyes due to decreasing electrostatic force existing between the negatively charged sorbate and positively charged sorbent.…”

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

“…The percentage adsorption is less at lower stirring rate and increases with increased stirring rate up to 250 rpm and thereafter shows no further change. Hence, with increasing shaking rate, adsorption was increased due to better contact between the adsorbent and the adsorbate [29]. Higher stirring rate forces the more efficient mass transfer of carbaryl molecules from bulk solution to the surface of the adsorbent as well as lesser time consumption [48].…”

“…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.…”