دوره 5، شماره 3 - ( 5-1396 )                   جلد 5 شماره 3 صفحات 65-77 | برگشت به فهرست نسخه ها


XML English Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Faraji M, Bazrafshan E, Almasian M, Khoshnamvand N. Investigation of Fluoride Adsorption from Aaqueous Solutions by Modified Eucalyptus Leaves: Isotherm and Kinetic and Thermodynamic Studies. Iran J Health Sci. 2017; 5 (3) :65-77
URL: http://jhs.mazums.ac.ir/article-1-502-fa.html
Investigation of Fluoride Adsorption from Aaqueous Solutions by Modified Eucalyptus Leaves: Isotherm and Kinetic and Thermodynamic Studies. علوم بهداشتی ایران. 1396; 5 (3) :65-77

URL: http://jhs.mazums.ac.ir/article-1-502-fa.html


چکیده:   (428 مشاهده)
Background and purpose: The World Health Organization (WHO) has specified the tolerance limit of fluoride content of drinking water to be 1.5 mg/L, since excessive intake of fluoride leads to various detrimental diseases. The present study assessed the adsorption effectiveness of HCl-modified eucalyptus leaves in fluoride removal from synthetic solutions.
Materials and Methods: In this experimental study, pseudo-first and pseudo-second order kinetics, Langmuir and Freundlich isotherm models, as well as pH (2-12), initial concentration (5-30 mg/L), adsorbent dose (0.1-1 g/L), and temperature (25-45 0C) were investigated on defluoridation.
Results: The results with the maximum removal efficiency of 90% was obtained in pH = 10, initial concentration = 5 mg/L, and adsorbent dose = 0.1 g/L. In the investigation of the effect of temperature on removal rates, the maximum removal of fluoride was observed to be in 45 0C. The removal efficiency also decreased while the adsorbent dose increased, the initial concentration of fluoride increased, and the temperature in the studied ranges decreased. It was also found that the adsorption equilibrium and kinetic data were in good agreement with Langmuir Model (R2=0.994) with qmax= 61.35 mg/g and pseudo-second order reaction (R2=0.999).
Conclusion: On the basis of the obtained results, HCl-modified eucalyptus leaves were found to be able to remove fluoride from aqueous environments with good removal efficiency and adsorption capacity.
 
 
متن کامل [PDF 582 kb]   (148 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: بهداشت محیط زیست
دریافت: ۱۳۹۶/۵/۲۸ | پذیرش: ۱۳۹۶/۵/۲۸ | انتشار: ۱۳۹۶/۵/۲۸

ارسال نظر درباره این مقاله : نام کاربری یا پست الکترونیک شما:
کد امنیتی را در کادر بنویسید

کلیه حقوق این وب سایت متعلق به می باشد.

طراحی و برنامه نویسی : یکتاوب افزار شرق

© 2015 All Rights Reserved | Iranian Journal of Health Sciences

Designed & Developed by : Yektaweb