ELECTROPHOTOCATALYTIC PROCESS OPTIMIZATION FOR FORMALDEHYDE

سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 637

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شناسه ملی سند علمی:

TCPCO02_042

تاریخ نمایه سازی: 22 مهر 1394

چکیده مقاله:

Contamination of industrial wastewater with formaldehyde as the priority pollutant is the most serious environmental problem in several countries worldwide. Discharging of industrial effluent with formaldehyde concentration of 100-1000 mg/l in to any natural water is considered as toxic substance to human beings. The goal of this applied - analytical research is to investigate of formaldehyde removal from urban drinking water by batch electrophotocatalytic (EPC) reactor withusing zinc oxide (ZnO) nanoparticles immobilized on zinc (Zn) sheet-copper electrode, and lamp emitting dynode (LED) ultraviolet-A (UV-A) lamp. The studied variables are pH (4-10), the formaldehyde concentration (100-300 mg/L), the lamp intensity (360-600 mW / cm2), radiation time (7.5-30 min), the distance between lamp and electrode (1.5 cm), layering of zinc oxide nanoparticles (1-3), and current density (3-9 mW/ cm2). The results show the correlation between removal of formaldehyde and UV-A lamp intensity, current density, and radiation time. Optimal removal (0 mg/L) is obtained at pH 10, radiation time: 7.5 minutes, 2- layer of ZnO nanoparticles, and current density of 6 mW / cm2. The findings indicate that removal efficiency is increased with increasing current density, radiation time, and lamp intensity

نویسندگان

g Kashi

Department of Environmental Health, Islamic Azad University Tehran Medical Sciences Branch, Tehran, Iran

f Khoshab

Department of Environmental Health, Islamic Azad University Tehran Medical Sciences Branch, Tehran, Iran

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