مقایسه کارائی کربن مرک با کربن های تولیدی در حذف اسید هیومیک از محلولهای آبی ( مطالعات ایزوترمی و سنیتیکی)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی بهداشت محیط ، دانشکدة بهداشت، دانشگاه علوم پزشکی سبزوار، سبزوار، ایران

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

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

4 دانشجوی کارشناسی ارشد مهندسی بهداشت محیط، دانشکدة بهداشت، دانشگاه علوم پزشکی سبزوار، سبزوار، ایران

چکیده

مقدمه و هدف: وجود اسید هیومیک در منابع آبی مشکل اصلی منابع آب برای سلامتی است، از آنجا که روشهای متفاوتی برای حذف آن آن موجود است. از این میان جذب یک روش موثری برای حذف اسید هیومیک به شمار می‌آید. بنابراین از زئدات کشاورزی فعال شده با کلراید آمونیاک به عنوان تهیه کربن استفاده شد.
مواد و روش کار: در مطالعه حاضر از کربن مرک استاندارد و کربن تهیه شده از زائدات چنار و گیاه اسکنبیل به عنوان جاذب استفاده شد و آزمایشات جذب در حالت ناپیوسته انجام گردید که در آن تاثیر انواع پارامترها از قبیل نوع کربن، دوز جاذب(g/l1-1/0)، pHاولیه (10-2)، و زمان تماس(min50-5) در حذف اسید هیومیک مورد بررسی قرار گرفت و بر روی ظرفیت جذب دو مدل ایزوترم لانگمیر و فروندلیچ بحث شد
نتایج: نتایج نشان داد که pH در حذف اسید هیومیک یک پارامتر مهمی است، و ایزوترم نشان داد که فرآیند جذب از ایزوترم لانگمیر پیروی می کند، همچنین نوع کربن به شدت در فرآیند جذب تاثیر دارد که ظرفیت جذب در شرایط بهینه برای کربن مرک 238 میلی گرم بر گرم و برای کربن اسکنیل و چنار به ترتیب 294 ، 250 میلی گرم بر گرم می‌باشد
نتیجه گیری: کربن تهیه شده از اسکنیل به دلیل ظرفیت جذب بالا در حذف اسید هیومیک از اب می‌تواند موثر باشد

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison efficiency Merck carbon and productivity in the removal of humic acids from aqueous solutions , studies isotherm and Synthetic

نویسندگان [English]

  • Ahmad Alahabadi 1
  • Abolfazl Rahmani Sani 2
  • Zahra Rezai 3
  • Mahnaz Torabi 4
1 Assistant Professor, Department of Environmental Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
2 Associate Professor, Department of Environmental Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
3 Lecturer, Department of Environmental Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran
4 Masters Student of Environmental Health Engineering, School of Public Health, Sabzevar University of Medical Sciences, Sabzevar, Iran.
چکیده [English]

Background and Background and goal : The attendance of humic acid in water resources is the main health problems of many Societies. There are various methods for decreasing or removing of humic acid. Of these absorbed is considered an effective method to remove it. SO Agriculture wastes were used for preparation of activated carbons by chemical activation using Ammonium chloride.
Method: In this study, the standard Merck carbon and carbon produced from plant waste used as adsorbents and adsorption experiments were performed in batc. Adsorption of humic acid (HA) on SAC and NAC as a function of solution initial pH (2-10), adsorbent dosage (0.1-1 g/L), contact time (5-50 min), concentration (5-20 mg/L), on the adsorption capacity, the two-parameter equilibrium models (Langmuir and Freundlich equations) were debated.
Result: The result showed that the pH effect at removal humic acid is an important parameter, and isotherm showed that the adsorption Followed of the Langmuir isotherm. Also it was found that the capacity of absorb can be markedly effected by carbon type. That it was 238, 294 , 250 mg/g For carbons Merck, Sycamore and steel respectively.
Conclusion: Carbon prepared from Steel due to very high capacity could be effective for removal humic acid from aqueous solution.

کلیدواژه‌ها [English]

  • Agriculture wastes
  • adsorption
  • Humic acid
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دوره 25، شماره 4
مهر و آبان 1397
صفحه 528-536
  • تاریخ دریافت: 29 آبان 1395
  • تاریخ بازنگری: 21 اسفند 1395
  • تاریخ پذیرش: 27 اسفند 1395
  • تاریخ اولین انتشار: 01 مهر 1397