Optimization of experimental parameters in the treatment of textile effluents charged by colorant blueTelonthe using the experimental design method

In the present paper, a systematic study of the influence of experimental parameters and operating conditions on the effectiveness of the adsorption process using olive active as adsorbent. The influence of the parametersis studied at two levels, fractional factorial designs and a Doehlert uniform shell design to determine the influence of the adsorption conditions. The analysis of the experimental responses (mass adsorbent (Natural Resin)and Temperature and Time and pH, respectively) shows that the parameters which have the greatest influence change depending on the response. The results concerning the theoretical parameters, allowed us to give better treatment by adsorption (Natural Resin (NR), blue Telon (BT)) in optimal conditions, namely: the temperature in the range (80 °C), mass Natural Resin order (50mg), the agitation of the order (1000Torr/min) and the pH of the order (10

Comparative Study of Chemical Composition and the biological effect of essential oils for two plants; Lavandula Stoechas et Laurus Nobilis.

For both plants, the aerial parts used of Lavandula Stoechas (LS) and Laurus Nobilis (LN) are leaves harvested during the flowering period. They give respectively (0.12%; 0.45%) and (0.326% 0.623%) by hydrodistillation essence. The constituents of the chemical composition have been identified by gas chromatography coupled to mass spectrometry (GC-MS). The essential oils leaves of LN and LN for two areas, "Zinat" and "Hallila" are very rich in oxygenated monoterpenes. Moreover, the biological effect, for essential oils of LS and LN possess an antibacterial activity against a bacteria Bacillus subtilis, except for LN has also the effect against Escherichia coli K12 and other bacteria don’t  have  the effect against Porteus sp, Staphylococcus aureus and Escherichia coli K12 LS of our species