Purification Of Different Types Of Waters In The Region Of Tiaret (Algeria) By Biological And Physical Methods

Abstract

The considerable development of agricultural and industrial activity has led to the emergence of new classes of organic pollutants say "persistent" which are resistant to the processes of conventional treatment of the waters.

Among the most recent progress, based on the techniques of advanced oxidation, photocatalysis represents of our days, an emerging solution to the problems of pollution of groundwater environments, because that can degrade organic matter in basic products and be less toxic. This technique associated with a biological method "bio-monitoring" allows you to purify the waters effectively, simply, and less costly.

Our results show Lemna minor accumulates well lead and zinc in the different waters, these levels oscillate an average of 25.00 ± 5,00μg/g at 80,00 ± 29,17µg/g and 575,76 ± 367,74µg/g to 18.00 ± 4,33μg/g respectively for the lead and zinc. The use of the photocatalytic process in the presence and absence of photocatalyst SnO2 and the aquatic plant Lemna minor under visible light found that the absorbance decreases compared to the initial state which confirms that this method is reliable for the purification of water.