fa حذف بنزن از هوا با استفاده از فتوکاتالیستTiO2-Bi2O3 پوشش داده شده بر فوم شیشه تحت تابش فرابنفش هوا Air پژوهشي Research <div style="text-align: justify;"><span style="font-size:12pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="line-height:95%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="color:black">زمینه و هدف:</span></span></span></b> <span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">بنزن یکی از </span></span>&nbsp;<span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">مواد آلی فرار سرطانزا است که در هوای آلوده یافت می شود</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">. هدف از این مطالعه حذف بنزن از هوا</span></span> <span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">با استفاده از فتوکاتالیست</span></span> <span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">کامپوزیت</span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%"> TiO₂-Bi₂O₃</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">تثبیت شده روی فوم شیشه تحت تابش فرابنفش بود. </span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="color:black"><span style="letter-spacing:-.2pt"></span></span></span></span></span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="line-height:95%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="color:black"><span style="letter-spacing:-.1pt">روش</span></span></span></span></b><b><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="color:black"><span style="letter-spacing:-.1pt">‌</span></span></span></span></b><b><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="color:black"><span style="letter-spacing:-.1pt"> بررسی:</span></span></span></span></b><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"> در یک راکتور کوارتز </span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">فوم شیشه پوشش شده با کامپوزیت </span></span>&nbsp;<span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂-Bi₂O₃</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">قرار داده</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> شد </span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">و سپس راکتور در داخل یک </span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">اتاقک</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"> شیشه ای درپوش دار</span></span>&nbsp;<span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"> به پمپ هوا متصل و لامپ </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">UV</span></span><span style="line-height:95%"><span b="" lotus="" style="font-family:"> (</span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">nm</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:"> 254) در کنار آن نصب گردید. حجم‌های معین (</span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">L</span></span><span lang="AR-SA" style="line-height:95%"><span calibri="" style="font-family:">&micro;</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">) بنزن</span></span>&nbsp;<span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">از طریق سپتوم به داخل اتاقک تزریق شد. با روشن شدن پمپ</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">، </span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">هوای آلوده به بنزن</span></span>&nbsp;<span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">از فتوراکتور عبور می کرد. با نمونه گیری از هوای داخل اتاقک</span></span>&nbsp;<span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">و استفاده از دستگاه </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">GC-FID</span></span><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">، غلظت بنزن اندازه گیری شد.<span style="color:black"><span style="letter-spacing:-.1pt"></span></span></span></span></span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:95%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">یافته</span></span></b><b><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="letter-spacing:-.2pt">‌</span></span></span></b><b><span lang="AR-SA" style="line-height:95%"><span b="" lotus="" style="font-family:">ها:</span></span></b> <span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">طیف </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">XRD</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> و تصاویر </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">SEM</span></span><span style="line-height:95%"><span b="" lotus="" style="font-family:"> تائید کننده وجود </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">و</span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">Bi₂O₃ </span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">&nbsp;و آنالیز </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">BET</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> تائیدکننده وجود مزو حفره در فتوکاتالیست کامپوزیت تهیه شده است. میزان جذب سطحی بنزن در کامپوزیت 15 درصد و از مدل لانگمویر تبعیت نمود. سینتیک فرایند از نوع درجه یک بود. با افزایش غلظت بنزن راندمان حذف کاهش یافت. برای غلظت </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">ppm</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> 39 بنزن در مورد </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> و تابش فرابنفش به مدت </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">min</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> 75، راندمان حذف 75 درصد</span></span> <span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">بود در حالی که در مورد </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂-Bi₂O₃</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> با شرایط مشابه راندمان حذف حدود 90 درصد بدست آمد. </span></span></span></span></span></span></span><br> <span style="font-size:12pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="line-height:95%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span new="" roman="" style="font-family:" times=""><b><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"><span style="letter-spacing:-.1pt">نتیجه‌گیری:</span></span></span></b> <span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">استفاده از فتوکاتالیست کامپوزیت </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂-Bi₂O₃</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:">و تابش </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">UV-A</span></span><span style="line-height:95%"><span b="" lotus="" style="font-family:"> موجب افزایش راندمان 15 درصد حذف بنزن نسبت به </span></span><span dir="LTR" style="font-size:11.0pt"><span style="line-height:95%">TiO₂</span></span><span lang="FA" style="line-height:95%"><span b="" lotus="" style="font-family:"> به تنهائی شده است.&nbsp; </span></span></span></span></span></span></span></span></span></div> <div style="text-align: justify;"><span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt">Background and Objective:</span></b><span style="font-size:11.0pt"> Benzene is a carcinogenic volatile organic compound commonly found in polluted air. This study aimed to remove benzene from air using a TiO₂&ndash;Bi₂O₃ composite photocatalyst immobilized on glass foam under ultraviolet (UV) light irradiation.<br> <b>Materials and Methods:</b></span> <span style="font-size:11.0pt">Glass foam coated with the TiO₂&ndash; Bi₂O₃composite was placed in a quartz reactor, which was connected to an air pump inside a sealed glass chamber. A UV lamp (254 nm) was installed next to the reactor. Known volumes (&micro;L) of benzene were injected into the chamber through a septum. When the pump was activated, benzene-contaminated air passed through the photoreactor. Benzene concentration was measured by collecting air samples from the chamber and analyzing them using a GC-FID device.</span></span></span><br> <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt">Results:</span></b><span style="font-size:11.0pt"> XRD spectra and SEM images confirmed the presence of TiO₂ and Bi₂O₃, while BET analysis verified the mesoporous structure of the composite photocatalyst. The surface adsorption of benzene by the composite was 15% and followed the Langmuir model. The process kinetics were first-order, and the removal efficiency decreased with increasing benzene concentration. At a benzene concentration of 39 ppm, the removal efficiency after 75 minutes of TiO₂ and UV irradiation was 75%, whereas for TiO₂&ndash; Bi₂O₃ under similar conditions, the efficiency increased to approximately 90%.</span></span></span><br> <span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><b><span style="font-size:11.0pt">Conclusion:</span></b><span style="font-size:11.0pt"> Using a TiO₂&ndash; Bi₂O₃ composite photocatalyst under UV-A irradiation improved benzene removal efficiency by about 15% compared with TiO₂alone.</span></span></span><br> &nbsp;</div> فوم شیشه, بنزن, هوا, فتوکاتالیست, TiO2-Bi2O3 Foam glass, Benzene, Air, Photocatalyst, TiO2-Bi2O3 489 504 http://ijhe.tums.ac.ir/browse.php?a_code=A-10-165-1&slc_lang=fa&sid=1 Ramazanali Dianati Tilaki رمضانعلی دیانتی تیلکی dianati.tilaki@gmail.com Yes Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران Roghayeh Kaseb رقیه کاسب roghayeh.kaseb72@gmail.com No Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران Esmaeil Babanejad Arimi اسماعیل بابانژاد آریمی esmaeil.babanezhad@gmail.com No Department of Environmental Health Engineering, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی مازندران، ساری، ایران Mohammad Dianati محمد دیانتی mohammaddt88@gmail.com No Department of Thermokinetics and Catalysis, Faculty of Chemical Engineering, Noushirvani University of Technology, Babol, Iran گروه ترموسینتیک و کاتالیست، دانشکده مهندسی شیمی، دانشگاه صنعتی نوشیروانی بابل، ایران