TITLE:
Removal of Carbaryl Pesticide from Aqueous Solution by Adsorption on Local Clay in Agadir
AUTHORS:
Mahmoud El Ouardi, Said Alahiane, Samir Qourzal, Abdelhadi Abaamrane, Ali Assabbane, Jamâa Douch
KEYWORDS:
Carbaryl; Clay; Adsorption Isotherms; Water Treatment
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.4 No.7A,
July
5,
2013
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 (NaNO3), 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 (R2) 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.