Evaluation of Freundlich and Langmuir adsorption isotherm models for rice husk adsorbent in water salinity purification.

Document Type : Original Article

Author

Department of Irrigation and Reclamation Engineering ,University of Tehran ,,Iran.

Abstract

Quality water resources are limited. The use of biological adsorbents in reducing water salinity is a new and environmentally friendly method. The purpose of this article is to determine the amount of salinity removal by the rice husk adsorbent and estimate the amount of absorption by Freundlich and Langmuir adsorption isotherm models and their evaluation. In this study, a tank (part of the physical model) with a height of approximately 50 cm and a diameter of 20 cm was used, and it was divided into two parts based on the height of the tank. In the center of the location of the absorber under study, a specific thickness of 8 cm was considered. On both sides of the absorbent layer, either upwards (reservoir surface) or downwards (reservoir bottom), layers of silica sand with 0.3, 0.6 and 1 cm granularity were placed in a height of 5 cm. Water quality treatments including calcium and magnesium, sodium and chlorine (salinity) at four salinity concentrations of 0.2, 0.5, 0.7 and 1 dS/m were passed through the rice husk adsorbent and the amount of cat ions and anions absorbed by the adsorbent It was measured. The results showed that for different concentrations, absorption is very high at the beginning and decreases over time. The equilibrium time for qualitative parameters of calcium and magnesium, sodium and chlorine obtained between 60 and 90 (at a water temperature of 25 degrees Celsius and an acidity of 7.4) minutes. The results showed that on average, a high percentage of calcium, magnesium and sodium cat ions in water (about 50-60%) have been absorbed by rice husk. The results of the adsorption isotherm model showed that the adsorption isotherm model of the Freundlich has a better estimate than the Langmuir model (10 to 15 percent).

Keywords

References

ابوالحسنی، م.ه.، پیرستانی، ن. و طهماسبی، ف. 1400. بررسی کارایی جاذب آلی پوسته برنج در جذب آلودگی‌های نفتی از آب، مجله پژوهش‌های محیط‌زیست، 12 (23): 170-161.
پور واعظی روکرد، ر.، قربانی ب.، نوری امامزاده ئی، م.ن. و میرزایی، س.م.ج. 1392. تأثیر پوسته گندم و خاک‌اره بر برخی از خواص فیزیکی و شیمیایی آب‌های شور. مجله پژوهش آب ایران. 7(12): 201 – 193.
رحمانی نسب، م. 1396. بررسی پوسته برنج، زئولیت، کربن فعال و شن برای تصفیه آب آبیاری، پایان‌نامه ارشد رشته مهندسی منابع آب، دانشگاه تهران.
رجا، ا.، میرزایی، ف. و شهریاری. 1400. بررسی ضخامت فیلتر شنی بر تصفیه آب در آبیاری قطره‌ای. مدیریت آب و آبیاری، 11(4):86-73.
شکریان، ف.، سلیمانی، ک.، نعمت زاده، ق.، و بی‌پروا، پ. 1396. امکان‌سنجی کاهش شوری آب توسط جاذب‌های زیستی پوسته برنج و صدف، فصلنامه علمی تخصصی پژوهشی مهندسی آبیاری و آّب. 7 (23): 106-93.
عزیزی، ش. و میرزایی، ف. 1399. بررسی کارایی حذف مواد جامد معلق در آب و کدورت توسط فیلترهای شنی تند، هشتمین کنفرانس مدیریت منابع آب 27 بهمن دانشگاه فردوسی مشهد.
Abdel-Ghani, N. T., Hefny, M. and El-Chaghaby, G. A. F. 2007. Removal of lead from aqueous solution using low cost abundantly available adsorbent. Int. J. Environ. Sci. Tech. 4(1): 67- 73.
Ayawei, N., Ebelegi, A. and Wankasi, D. 2017. Modelling and Interpretation of Adsorption Isotherms. Journal of Chemistry, 2017, Article ID: 3039817. ttps://doi.org/10.1155/2017/3039817.
Babazad, Z., Kaveh, F., Ebadi, M., Mehrabian, R.Z. and Juibari, M.H. 2021. Removal of lead and arsenic using macromolecule-carbonized rice husks, DOI: 10.1016/j.heliyon.2021.e06631.
Freundlich, H.M.F. 1906. Over the adsorption in solution, The Journal of Physical Chemistry. 57: 385–471.
Karam, D.S., Nagabovanalli, P., Rajoo, K.S., Ishak, C.F., Abdu, A., Rosli, Z., Muharam, F.M. and Zulperi, D. 2021. An overview on the preparation of rice husk biochar, factors affecting its properties, and its agriculture application. Journal of the Saudi society of agricultural scienses.
Langmuir, I. 1916. The constitution and fundamental properties of solids and liquids, Journal of the American Chemical Society. 38(11): 2221–2295.
Mirzaei, F. 2022. Evaluation of Pseudo-Second Order Kinetic model for activated carbon-sand filter in water treatment. https://civilica.com/doc/1630814
Mirzaei, F. 2022. Purification of suspended matter in water with sand-zeolite filter, activated carbon, evaluation of Freund Leach model. https://civilica.com/doc/1630814
Singh, P., Garg, S., Satpute, S. and Singh, A. 2017. Use of ricehuck ash to lower the sodium adsorbtion ratio of saline water, Dept. of soil and water engineering: 448-458.
Wong, K.K., Lee, C.K., Low, K.S. and Haron, M.J. 2003. Removal of Cu and Pb by Tartaric Acid Modified Rice Husk from Aqueous Solution. Chemosphere. 50: 23-28.
Iranian Journal of Irrigation & Drainage
Volume 17, Issue 5 - Serial Number 101
January and February 2024
Pages 943-952

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