Investigation of Fluoride Adsorption from Aaqueous Solutions by Modified Eucalyptus Leaves: Isotherm and Kinetic and Thermodynamic Studies
محل انتشار: مجله علوم پزشکی ایران، دوره: 5، شماره: 3
سال انتشار: 1396
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 78
فایل این مقاله در 13 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JHES-5-3_006
تاریخ نمایه سازی: 8 آذر 1402
چکیده مقاله:
Background and purpose: The World Health Organization (WHO) has specified the tolerance limit of fluoride content of drinking water to be ۱.۵ 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 (۲-۱۲), initial concentration (۵-۳۰ mg/L), adsorbent dose (۰.۱-۱ g/L), and temperature (۲۵-۴۵ ۰C) were investigated on defluoridation.
Results: The results with the maximum removal efficiency of ۹۰% was obtained in pH = ۱۰, initial concentration = ۵ mg/L, and adsorbent dose = ۰.۱ g/L. In the investigation of the effect of temperature on removal rates, the maximum removal of fluoride was observed to be in ۴۵ ۰C. 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 (R۲=۰.۹۹۴) with qmax= ۶۱.۳۵ mg/g and pseudo-second order reaction (R۲=۰.۹۹۹).
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.
کلیدواژه ها:
نویسندگان
Maryam Faraji
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
Edris Bazrafshan
Health Promotion Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
Mohammad Almasian
School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
Nahid Khoshnamvand
Environmental Health Researcher Lecturer, Department of Environmental Health Engineering, Lorestan University of Medical Sciences, Khorramabad, Iran
مراجع و منابع این مقاله:
لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :