@article { author = {Zamankhan, Hesam and Ayati, Bita and Ganjidoust, Hossein}, title = {Photocatalytic Degradation of Phenol by Immobilized Nano ZnO on Concrete Surface}, journal = {Nashrieh Shimi va Mohandesi Shimi Iran}, volume = {31}, number = {3}, pages = {9-19}, year = {2013}, publisher = {Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR}, issn = {1022-7768}, eissn = {}, doi = {}, abstract = {Phenol is a toxic and refractory water pollutant that cannot be completely degraded through common wastewater treatment methods. Methods such as active carbon adsorption, oxidation or biological digestion are not satisfying enough and only convert the pollutant from one phase to another, or may produce much more other toxic substances. The photocatalysis process is a new promising methodology among highly efficient methods for elimination of relatively recalcitrant organic compounds. Furthermore, application of nano materials as catalyst has successfully improved the efficiency of this method. In this report, the aqueous oxidation of phenol over ZnO is investigated as a potential method for abatement of this pollutant. Concrete has been used as the immobilized surface and activation energy was provided with 8W UV-A lamps. Results of the SEM test also confirm an appropriate cover of ZnO on the concrete surface. The effects of operating parameters such as the initial phenol concentration, the light intensity, the dosage of ZnO particles, and pH were studied. The photocatalytic system afforded the highest degradation efficiency at C0= 50 mg / L , ZnO=80 g / m2, pH=11, light intensity= 32 W and over 90% of the initial phenol was degraded after 5 hours.}, keywords = {photocatalyst,Nano ZnO,phenol removal,Concrete surface,UV lamp}, title_fa = {تجزیه فتوکاتالیستی فنل به وسیله نانو ذرات روی اکسید تثبیت شده بر بستر بتنی}, abstract_fa = {فنل از جمله آلاینده ‌های خطرناک و سخت تجزیه پذیر است که حذف کامل آن به روش ‌های معمول امکان‌ پذیر نمی ‌باشد. در این پژوهش حذف فنل از فاز مایع به‌ وسیله فتوکاتالیست نانو روی اکسید مورد مطالعه قرار گرفت. از بتن به عنوان بستر تثبیت نانو ذرات استفاده شد و انرژی تابشی به‌وسیله لامپ UVتأمین شد. تاثیر پارامترها شامل غلظت ماده آلاینده، شدت تابش، مقدار ذرات ماده کاتالیست و pH  مورد مطالعه قرار گرفت. در شرایط بهینه غلظت اولیه فنل 50 میلی‌ گرم در لیتر فنل، میزان ماده کاتالیست برابر 80 گرم در متر مربع، pHبرابر 11 و توان منبع تابش لامپ UV  برابر 32 وات ، بازده حذف سامانه پس از گذشت 5 ساعت بیش از 90 درصد بود.}, keywords_fa = {فتوکاتالیست,نانو روی اکسید,حذف فنل,بستر بتنی,لامپ UV}, url = {https://www.nsmsi.ir/article_6889.html}, eprint = {https://www.nsmsi.ir/article_6889_05af64cf0903a23525f1ce54f2ed7d36.pdf} }