الاكسدة الضوئية المحفزة لمبيد Paraquat dichloride بأستخدام العامل المساعد الجديد كرومات اوكسيد النيكل ( NiO-Cr2O3) في الانظمة المائية

Abstract

Paraquat dichloride, a herbicide that is always polluting our water system. Thus a lot of efforts has been conducted to treat the polluted water. In this study , Nickel oxide chromateis used as photocatalyst to degrade the paraquat dichloride in the presence of UV light ((λ=354 nm) . the photodegradation rate was measured by used UV-1650PC Shimadzu spectrophotometer. Paraquat dichloride showed the maximum absorption band at(λ=633nm) . As shown in results the best ratio of coupled from chromium oxide and nickel oxide in photocatalyst to degradation paraquat solution was NiO:CrO3 %weight ratio 1:0.18. and the optimum photocatalyst calcinations temperature for degradation paraquat dichloride was 700C0 . The best %weight of catalyst required to degred 3.7×10-3M of solution paraquat dichloride was (1g/L) while the best PH was under reang (7-9).