Decontamination of waters polluted with Simazine (cas 122-34-9) by sorption on mesoporous metal oxides

Add time:09/27/2019    Source:sciencedirect.com

Two mesoporous metal oxides, Al2O3 and Fe2O3, were evaluated as regards their ability to remove Simazine (cas 122-34-9), a highly persistent herbicide of s-triazines, using a batch equilibrium method. The effect of several experimental parameters such as pH, contact time, initial concentration and sorbent dosage on the sorption of the herbicide was investigated. The maximum sorption of simazine on Al2O3 and Fe2O3 was observed at pH 6.5 and 3.5, respectively. The different sorption capacities of the two oxides were explained considering a set of factors affecting the sorption process such as the surface area and the porosity.The kinetics of sorption on both oxides was described using a pseudo second-order model. The sorption of simazine on Fe2O3 was faster in comparison to that observed on Al2O3.It was shown that aluminum oxide can be regenerated by incineration, and consequently can be considered for industrial treatment systems designed to mitigate the pesticide pollution in the aquatic environments.

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