حذف رنگ کریستال ویوله از پساب‌های سنتتیک با استفاده از فرایند الکتروکواگولاسیون حاوی الکترودهای استیل- پلاتین

نویسندگان
هیوا حسینی 1
رویا جلیلیان 2
حدیث فتاحی 2
شهره حشمتی 2
ابوالفضل نعیم آبادی 3
هوشیار حسینی 1
سید امید رستگار 4
1 گروه مهندسی بهداشت محیط، دانشکده بهداشت، مرکز مطالعات عوامل محیطی موثر بر سلامت، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
2 کمیته تحقیقات دانشجویی، دانشگاه علوم پزشکی کرمانشاه، کرمانشاه، ایران
3 گروه مهندسی بهداشت محیط، دانشکده بهداشت و پیراپزشکی، دانشکده علوم پزشکی نیشابور، ایران
4 گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه کرستان، سنندج، ایران
چکیده
مقدمه

فرایند الکتروکواگولاسیون در بین فرایندهای اکسیداسیون به دلیل ویژگی‌های منحصر به فرد نظیر ‏طراحی ساده سیستم و وسعت عمل برای تصفیه انواع پساب­های صنعتی به‌عنوان یکی از تأثیرگذارترین روش­های تصفیه معرفی ‏شده است‎. برای ارتقا این فرایند محققان روش‌های مختلفی را پیشنهاد کرده‌اند. در این مطالعه فرایند الکتروکواگولاسیون با چیدمان الکترودی استیل اسفنجی-پلاتین و با هدف رنگ­زدایی از پساب حاوی کریستال ویوله ارزیابی شد.

مواد و روش­ها

به منظور تهیه پساب رنگی از پودر خشک کریستال ویوله در آب مقطر استفاده شد. برای تعیین میزان محتوای رنگ از ‌روش اسپکتروفتومتری (600 نانومتر) استفاده گردید. آزمایش‌های الکتروکواگولاسیون در یک بشر ‏‏1000 میلی‌لیتری و به صورت ناپیوسته انجام پذیرفت. سینتیک شبه مرتبه اول و شبه مرتبه دوم برای مطالعات سینتیکی استفاده شد. آزمون سمیت نیز با استفاده از باکتری‌های گروه کلیفرم به منظور اطمینان از کاهش سمیت کریستال ویوله صورت پذیرفت.

یافته­ها

نتایج نشان داد که فرایند مورد نظر در شرایط بهینه (9 pH، زمان 60 دقیقه، میزان جریان کاربردی 4/0 آمپر و غلظت رنگ 200 میلی‌گرم در لیتر)، پساب حاوی کریستال ویوله را با کارایی بالا (حدود % 63/99) از محیط آبی تصفیه نمود. آزمون سمیت میکروبی نیز نشان داد پساب تصفیه شده در این روش قابلیت استفاده مجدد یا تخلیه در محیط را داراست.

نتیجه­گیری

براساس نتایج به دست آماده فرایند الکتروکواگولاسیون با چیدمان الکترودی استیل اسفنجی-پلاتین به طور مؤثری می‌تواند در تصفیه پساب رنگی صنایع استفاده گردد.


کلیدواژه‌ها
کریستال ویوله
الکتروکواگولاسیون
الکترودهای استیل- پلاتین
آزمون سمیت

عنوان مقاله English

Decolorization of synthetic effluent containing Crystal Violet using Electrocoagulation process containing steel wool-platinum electrodes

نویسندگان English

hiwa hossaini 1
roya jalilian 2
hadis fatahi 2
shohre heshmati 2
abolfazl naeimabadi 3
hooshyar hossini 1
s omid rastegar 4
1 Department of Environmental Health Engineering, Center for Environmental Health Effects, Faculty of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
2 Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran
3 Department of Environmental Health Engineering, Faculty of Health and Paramedicine , Neyshabur University of Medical Sciences, Neyshabur, Iran
4 Department of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran
چکیده English

Introduction

The electrocoagulation process is one of the most effective treatment methods among the oxidation processes due to its unique properties such as simple design and extensive application for treating industrial wastewater. To promote this process, different ways have been proposed. In this study, the electrocoagulation process was incremented by the placement of steel wool and platinum electrodes and its potential were evaluated by decolorization of crystal violet (CV) from aqueous solution.

Materials and Methods

The colored solution was prepared from CV powder by its dissolution in distilled water. The spectrophotometric method (600 nm) was used to determine the color content. Electrocoagulation experiments were conducted in a 1000 mL backer and at a batch method. To evaluate the kinetic studies, first and second-order models were used. Toxicity tests were also performed using coliform bacteria to ensure the reduction of crystal violet toxicity.

Results

The results showed that the process could remove the colored solution with a high percentage rate of about 99.63% under optimal conditions (pH 9, time of 60 minutes, applied current 0.4 amperes and color concentration about 200 mg/L). The microbial toxicity test also indicated that the treated wastewater in this method can be reused or discharged in the environment.

Conclusion

Based on the results, the electrocoagulation with steel wool-platinum electrode arrangement can be effectively used in the treatment of color containing industrial wastewater.

کلیدواژه‌ها English

Crystal violet
electrocoagulation
Steel wool-platinum electrodes
Toxicity test
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