Degradasi Pestisida Diazinon dengan Proses Fotokatalisis Sinar Matahari Menggunakan Katalis C,N-CODOPED TiO2

Abstract

ABSTRAK DEGRADASI PESTISIDA DIAZINON DENGAN PROSES FOTOKATALISIS SINAR MATAHARI MENGGUNAKAN KATALIS C,N-CODOPED TiO2. Diazinon merupakan salah satu pestisida organofosfat yang sangat luas penggunaannya di bidang pertanian, namun ia bersifat sangat beracun. Pada penelitian ini diazinon didegradasi secara fotokatalisis menggunakakan katalis C,N-codoped TiO2 yang aktif pada sinar matahari. Beberapa faktor yang mempengaruhi proses degradasi dipelajari seperti massa katalis, pengaruh doping pada titania, pH larutan awal, dan waktu irradiasi. Penambahan katalis C,N-codoped TiO2 mampu meningkatkan persen degradasi diazinon secara siginifikan. Diazinon dengan konsentrasi awal 18 mg/l dan volume 20 ml terdegradasi sebesar 90,75% pada kondisi optimum pH 7, 12 mg katalis C,N-codoped TiO2, selama 300 menit fotokatalisis sinar matahari. Data hasil analisis High Performance Liquid Chromatography (HPLC) menunjukkan bahwa diazinon telah berhasil didegradasi. ABSTRACT DEGRADATION OF DIAZINON PESTICIDE BY SOLAR-LIGHT PHOTOCATALYSIS USING C,N-CODOPED TiO2 CATALYST. Diazinon is one of the most widely used organophosphate pesticides in agriculture, but it is highly toxic. In this study, diazinon was degraded by photocatalysis using an activated C,N-codoped TiO2 catalyst under solar-light irradiation. Several factors affecting the degradation process were investigated such as mass of the catalyst, the effect of doping on titania, the pH of the initial solution, and irradiation time. The addition of a C,N-codoped TiO2 catalyst was able to significantly increase diazinon degradation percentage. 20 mL of 18 mg/L diazinon was degraded by 90.75% under optimum conditions pH 7, 12 mg of C,N-codoped TiO2 catalyst within 300 min solar-light photocatalysis. HPLC analysis results showed that diazinon was successfully degraded.