اصلاح پلی‌اتیلن ترفتالات عامل‌دار شده با سنتز التراسونیک نانوذرات نقره و حذف و اندازه‌گیری الکتروشیمیایی رنگ متیل اورنژ

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد شیمی تجزیه، گروه شیمی، واحد ایلام، دانشگاه آزاد اسلامی، ایلام، ایران

2 استادیار، گروه شیمی، واحد ایلام، دانشگاه آزاد اسلامی، ایلام، ایران

چکیده

یکی از پرکاربردترین پلیمرها در تصفیه و جذب آلاینده، پلی‌اتیلن ترفتالات است که با تصفیه منابع آبی، مصرف آنها را بهینه و از محیط‌زیست محافظت می‌کند. مشکل این پلیمر عدم وجود گروه عاملی در سطح، برای اتصال نانوذرات است. بنابراین در این پژوهش، در دو مرحله ابتدا پلیمر، با گروه کربوکسیلیک به‌روش سنتز شیمیایی عامل‌دار شد، سپس نانوذره نقره به کمک روش اولتراسونیک بر روی آنها سنتز شد. شرایط بهینه سنتز نانوذرات به‌دست آمد (pH معادل 9 و غلظت 2/0 مولار). در این شرایط، میانگین اندازه ذرات 64 نانومتر بود. در بخش دوم، پلیمر اصلاح شده برای حذف رنگ متیل اورانژ استفاده شد. پارامترهای بهینه برای حذف بررسی شد (pH معادل 9، دمای 35 درجه سیلسیوس و نسبت غلظت رنگ به جاذب 5 میکرومولار در 1/0 گرم). بیشترین درصد حذف رنگ در شرایط بهینه، 92 درصد پس از 120 دقیقه بود. اثر ضد باکتری پلیمر PET-AgNPs بر روی دو نوع باکتری استافیلوکوکوس اورئوس و اشرشیاکلی گرم مثبت و گرم منفی مشاهده شد. در بخش دوم، الکترود طلا را با ترکیبی از پلیمر PET-AgNPs و نانولوله کربنی اصلاح کرده و برای تشخیص رنگ متیل اورانژ استفاده شد. دامنه خطی 6-10×5 تا 8-10×2 مولار و حد تشخیص 9-10×6/7 مولار به‌دست آمد. پارامترهای مؤثر بر حذف و ایزوترم و سینتیک حذف بررسی شد. پلیمر عامل‌دار و اصلاح شده به‌خوبی قادر به اندازه‌گیری و حذف رنگ آلاینده بوده و علاوه بر آن، اثر ضد باکتریایی دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Modification of Functionalized Polyethylene Terephthalates by Ultrasonic Synthesis of Silver Nanoparticles and Removal and Electrochemical Measurement of Methyl Orange Dye

نویسندگان [English]

  • Hossein Heydari 1
  • Hossein Peyman 2
  • Hamideh Roshanfekr 2
1 MSc. of Analytical Chemistry, Dept. of Chemistry, Ilam Branch, Islamic Azad University, Ilam, Iran
2 Assist. Prof., Dept. of Chemistry, Ilam Branch, Islamic Azad University, Ilam, Iran
چکیده [English]

One of the most widely used polymers in the treatment and absorption of pollutants is polyethylene terephthalate, which optimizes their consumption and protects the environment by purifying water sources. The problem with this polymer is the lack of a functional group on the surface to bind the nanoparticles. Therefore, in this study, we first functionalized the polymer with the carboxylic group by chemical synthesis, then we synthesized silver nanoparticles on them by ultrasonic method. Optimal nanoparticle synthesis conditions were obtained (pH=9 and concentration 0.2 M). Under these conditions, the average particle size was 64 nm. In the second part, modified polymer was used to remove Methyl orange dye. Optimal parameters for removal were investigated (pH=9, temperature of 35 °C and ratio of dye concentration to adsorbent of 5 μM/0.1 g). The highest percentage of paint removal under optimal conditions was 92% after 120 minutes. The antibacterial effect of PET-AgNPs polymer was observed on two types of bacteria, Staphylococcus aureus and Escherichia coli, gram-positive and gram-negative. In the second part, the gold electrode was modified with a combination of PET-AgNPs polymer and carbon nanotubes and was used to detect methyl orange dye. The linear range was 5×10-6 to 2×10-8 M and the detection limit was 7.6×10-9 M. Parameters affecting removal and isotherm and removal kinetics were investigated. The functionalized and modified polymer is well able to measure and remove the contaminant dye and, in addition, it has an antibacterial effect.

کلیدواژه‌ها [English]

  • Functionalization
  • Ultrasonic
  • Polyethyleneterephthalate
  • Removal
  • Adsorbent
  • Silver Nanoparticles
  • Methyl Orange Dye

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مجله آب و فاضلاب
دوره 33، شماره 3 - شماره پیاپی 140
مرداد و شهریور 1401
صفحه 1-14

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