Bentonite surface modification and characterization for high selective phosphate adsorption from aqueous media and its application for wastewater treatments | Zendy

Soghra Yaghoobi Rahni | Zendy; Behzad Rezaei | Zendy; Nourollah Mirghaffari | Zendy

Open Access

Bentonite surface modification and characterization for high selective phosphate adsorption from aqueous media and its application for wastewater treatments

Author(s) -

Soghra Yaghoobi Rahni,

Behzad Rezaei,

Nourollah Mirghaffari

Publication year - 2016

Publication title -

journal of water reuse and desalination

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.548

H-Index - 16

eISSN - 2408-9370

pISSN - 2220-1319

DOI - 10.2166/wrd.2016.212

Subject(s) - bentonite , adsorption , phosphate , chemistry , aqueous solution , nuclear chemistry , wastewater , sorbent , freundlich equation , langmuir adsorption model , langmuir , chromatography , inorganic chemistry , chemical engineering , organic chemistry , waste management , engineering

Raw and modified bentonite has been used to develop effective sorbents to remove phosphate from aqueous solution. Acidthermoactivation, Rewoquate, Irasoft, calcium, Fe and Al were employed to treat the bentonite. Results show that samples adsorption capacity for phosphate is in order of, unmodified bentonite = acidthermoactivation < Rewoquate < calcium ≅Irasoft < Fe < Al ≅ Fe-Al. The phosphate adsorption with Fe-Al-bentonite (FAB) modification was more than 99% and the phosphate removal reached the peak value in the initial 30 min. The phosphate adsorption of FAB was pH independent in the range of 2–10. The common coexisting ions in wastewater have no effect on the phosphate adsorption. The phosphate adsorption results were very well fitted in the Freundlich and Longmuir isotherm model and the maximum adsorption capacity was 8.33 mg P/g at pH 6.5 for 1 hour, which was better than similar modified bentonite with low time and Fe-Al consumption. FAB was characterized by scanning electron microscopy, X-ray diffraction, X-ray fluorescence and Fourier transform infrared. Therefore, the results confirm that FAB is a selective phosphate sorbent and environmentally friendly for its potential application for phosphate removal from wastewater.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research