بررسی کارایی کربن فعال‌شده با آمونیوم در حذف آنتی‌بیوتیک سولفانیل‌آمید از آب آلوده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط، دانشکدة علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران

2 استاد گروه مهندسی بهداشت محیط، دانشکدة علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران

3 دانشیار گروه مهندسی بهداشت محیط، دانشکدة بهداشت، دانشگاه علوم پزشکی سبزوار، سبزوار، ایران

4 استادیار گروه مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط، دانشکدة علوم پزشکی، دانشگاه تربیت مدرس، تهران، ایران

چکیده

زمینه و هدف: با پیشرفت صنایع و افزایش جمعیت، آلاینده‌های شیمیایی نوپدیدی وارد منابع آب‌های طبیعی شده‌اند. لذا در این مطالعه پتانسیل جذب کربن فعال اصلاح شده با کلرید‌ آمونیوم (NAC) برای حذف آنتی‌بیوتیک سولفانیل‌آمید از آب-های آلوده مورد بررسی قرار گرفت.
روش بررسی: در این مطالعه تاثیر متغیرهای اساسی از جمله pH محلول، غلظت کربن فعال، غلظت اولیه سولفانیل‌آمید و زمان واکنش بر حذف سولفانیل‌آمید سنجیده شد.
یافته ها: کربن فعال NAC و SAC (کربن فعال تجاری) دارای سطح ویژه به ترتیب 1029 و 1024 m2/g و متوسط حجم روزنه nm 46/2 و 23/2 می‌باشند. با افزایش غلظت جاذب NAC به gr/L 1، راندمان جذب سولفانیل‌آمید پس از min 40 به 4/84% رسید و بعد از این زمان روند تغییرات جذب تا زمان min 120 با مقادیر جزئی افزایش می‌یابد و به حداکثر راندمان جذب 2/99% می‌رسد که در شرایط یکسان درصد حذف سولفانیل‌آمید با کربن SAC به ترتیب به 5/40% و 2/%49 می‌رسد. کینتیک جذب غلظت‌های دو جاذب NAC و SAC از معادلات درجه دوم کاذب پیروی می‌کند. حداکثر ظرفیت جذب سولفانیل‌آمید روی کربن NAC و SACبر اساس ایزوترم جذب لانگمویر به ترتیب 1/238(mg/g) و 7/87 (mg/g) بدست آمد.
نتیجه گیری: این نتایج نشان می‌دهند که کربن NAC، یک جاذب موثر با کارایی بالا در حذف آنتی‌ بیوتیک‌ها از جریان‌های آب آلوده می‌باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating the Performance of Carbon Activated with Ammonium Solution in the Removal of Sulfanilamide from the Contaminated Water

نویسندگان [English]

  • Parisa Baratpour 1
  • Seyed Gholamreza Moussavi 2
  • Ahmad Alahabadi 3
  • Sakine Shekoohiyan 4
1 MSc, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
2 Professor, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
3 Associate Professor, Department of Environmental Health Engineering, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
4 Assistant Professor, Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
چکیده [English]

Background & Objective: With industrial development and population growth, the emerging contaminants enter into the natural water resources. Therefore, in this study Adsorption potential of NH4Cl-induced activated carbon (NAC) was investigated to remove antibiotic sulfanilamide from contaminated water.
Materials &Methods: The effect of operational conditions including solution pH, NAC concentration, sulfanilamide initial concentration and contact time were studied.
Results: NAC and SAC had specific surface area of 1029, 1024 and mean pore volume of 2.64, 2.23nm, respectively. With increasing the NAC concentration to 1 g/L, sulfanilamide adsorption efficiency increased to 84.4% within 40 min. Then the adsorption slightly increased with the increase in the contact time to 120 min and reached to its maximum adsorption of 99.2%. The maximum adsorption percentage of sulfanilamide onto SAC under similar conditions reached to 49.2%. The kinetics analysis showed that experimental adsorption data for both NAC and SAC were best fitted to the pseudo-second-order model. The maximum adsorption capacity of sulfanilamide onto NAC and SAC, calculated by the Langmuir model, was 238.1 and 87/7 mg/g, respectively.
Conclusion: Generally, these results showed that NAC was an efficient adsorbent with high removal efficiency for eliminating the antibiotics from the contaminated water streams

کلیدواژه‌ها [English]

  • antibiotic residuals
  • sulfanilamide
  • contaminated water
  • adsorption
  • modified activated carbon
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دوره 26، شماره 6
بهمن و اسفند 1398
صفحه 797-807
  • تاریخ دریافت: 26 بهمن 1395
  • تاریخ بازنگری: 01 آذر 1397
  • تاریخ پذیرش: 19 اسفند 1398
  • تاریخ اولین انتشار: 19 اسفند 1398