حذف هیدروکربن‌های نفتی از آب‌های آلوده با فرآیند فتوکاتالیستی خورشیدی

نوع مقاله : پژوهشی

نویسندگان

• فتاح سروش
• حسین گنجی دوست
• بیتا آیتی

دانشگاه تربیت مدرس

10.22067/civil.v29i1.42661

چکیده

حذف هیدروکربن‌های نفتی از آب آلوده به‌صورت سنتزی در یک فتورآکتور خورشیدی در حضور نانوذرات TiO2 پوشش یافته بر صفحات بتنی انجام گردید. فتورآکتور مورد استفاده شامل یک مخزن ذخیره به حجم 60 لیتر همراه با پمپ شناور، سیستم پلکانی با 5 عدد پلۀ تثبیت‌شده با نانو TiO2، یک سرریز به حجم 5 لیتر در بالای پلکان و شاسی فلزی با ملحقات آن بود. در این رآکتور بخش ماورای بنفش (UV) نور خورشید به‌عنوان منبع تأمین انرژی به‌جای لامپ UV استفاده شد. پارامترهای بهینۀ حاصل pH برابر 5، بارگذاری جرمی TiO2 60 گرم بر متر مربع، مدت زمان تابش UV معادل 200 دقیقه، غلظت اولیه 100 میلی‌گرم بر لیتر و غلظت H2O2 برابر 2000 میلی‌گرم بر لیتر بودند. نتایج نشان داد که در شرایط بهینه راندمان حذف COD، مجموع هیدروکربن‌های نفتی (TPH) و هیدروکربن‌های چندحلقوی (PAHs) به‌ترتیب برابر با 48/70، 63/67 و 75/84 درصد می‌باشد. هم‌چنین نتایج آزمایش GC-FID در شرایط بهینه نشان داد که بیشتر هیدروکربن‌های حذف‌شده از نوع پلی‌آروماتیک بودند و آن‌چه باقی‌ماند از نوع هیدروکربن‌های بدون خطر آلیفاتیک بود.

کلیدواژه‌ها

• فتورآکتور خورشیدی
• TiO2
• بتن سبک
• TPH
• AH ،
• COD

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عنوان مقاله [English]

Removal of Petroleum Hydrocarbons from Contaminated Waters Using a Solar Photocatalytic Process

نویسندگان [English]

• Fattah Soroush
• Hossein Ganjidoust
• Bita Ayati

Tarbiat Modares Univ.

چکیده [English]

Removal of petroleum hydrocarbons from synthetic contaminated water using with photocatalytic process was conducted in the presence of nano TiO2 immobilized on the concrete plates. The solar photoreactor was consisted of storage tank of 60 L with floating pump, cascade system with 5 concrete steps, a 5 L weir on the top of the stairs and metalic chassis. The UV-A radiation of the sunlight was used instead of UV-A lamps as the irradiation source. The optimum parameters were pH of 5, TiO2 mass loading of 60 grm-2, UV equivalent irradiation time of 200 min, initial concentration of 100 mgL-1 and H2O2 concentration of 2000 mgL-1.The results demonstrated that under optimal conditions removal efficiency of chemical oxygen demand (COD), total petroleum hydrocarbons (TPH) and poly aromatic hydrocarbons (PAHs) were 70.48%, 67.63 % and 84.75% respectively. Also the results of GC-FID analysis indicated that most of PAHs were eliminated and only non-toxic aliphatic hydrocarbons were remained.

کلیدواژه‌ها [English]

• Solar photoreactor
• TiO2
• Light-Weighted Concrete
• TPH
• PAH
• COD

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