تعیین شرایط بهینه حذف اسید قرمز 14 توسط نانوذرات آهن اصلاح شده با نیکل در سیستم دوغابی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس، تهران

2 دانشیار، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس، تهران

چکیده

در این پژوهش، برای حذف رنگزای اسید قرمز 14 در سیستم دوغابی از نانوذرات دو فلزی آهن- نیکل استفاده شد که ساخت آن از روش رسوب‌دهی شیمیایی کلرید آهن توسط عامل احیا کننده قوی سدیم بورهیدرید بود. پارامترهای غلظت اولیه رنگزا، دز نانوذرات، pH، مدت زمان طی شده از ساخت تا استفاده نانوذرات، سرعت همزن و دما برای رسیدن به شرایط بهینه بررسی شد. سپس برای شناسایی سایر عوامل مؤثر، آزمایش‌های شاهد، در شرایط بهینه انجام شد. شرایط بهینه در دمای 2±25 درجه سلسیوس در غلظت نانوذرات تازه برابر 05/0 گرم در لیتر، غلظت اولیه رنگزا 200 میلی‌گرم در لیتر، pH برابر5/7 و دو دقیقه هم‌زدن به‌دست آمد. طبق نتایج حاصل، این نانوذرات فعالیت بسیار بالایی داشتند به‌طوری که راندمان حذف رنگزا در شرایط بهینه پس از 2، 30 و 240 دقیقه به‌ترتیب 39/79 ،52/90 و 42/94 درصد و همچنین راندمان حذف COD بعد از گذشت 4 ساعت از شروع واکنش برابر 61/72 درصد به‌دست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determine the Optimum Conditions for Acid Red 14 Removal by Iron Nanoparticles Modified with Nickel in a Slurry System

نویسندگان [English]

  • Marziyeh Niksefat 1
  • Bita Ayati 2
1 MSc Student, Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran
2 Assoc. Prof., Faculty of Civil and Environmental Engineering, Tehran
چکیده [English]

In this study, bimetallic iron–nickel nanoparticles were obtained by chemical co-deposition of iron chloride with sodium boron hydride used as a strong reducing agent. The bimetallic nanoparticles thus obtained were then used to remove acid red 14 in a slurry system. Experiments were conducted to investigate such parameters as initial dye concentration, nano-particle dosage, pH, the time required for the nano-particles to be used after they are formed, the stirring speed, and the temperature required to reach optimum reaction conditions. Control experiments were subsequently performed under the optimum conditions thus determined to identify any other remaining factors involved. The optimum conditions included a temperature of 25±2 ºC, a newly synthesized nano-particle concentration of 0.05 g/L, an initial dye concentration of 200 mg/L, a pH level of 7.5, and a mixing duration of two minutes. The results indicated the high activity of the nanoparticles such that removal efficiencies equal to 79.39, 90.52, and 94.42 percent were achieved after 2, 30, and 240 minutes, respectively. Moreover, a COD removal of 72.61 percent was achieved after 4 hours of reaction.

کلیدواژه‌ها [English]

  • Wastewater Treatment
  • Oxidation and Reduction
  • Bimetallic Nanoparticles of Fe-Ni
  • Remove the Dye
  • Acid Red 14 (AR14)
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