Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 494, Issue -, Pages 380-388Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.01.105
Keywords
Oxidized multi-walled carbon nanotubes; Hydroxyapatite; Magnetic separation; Pb(II); Methylene blue
Categories
Funding
- National Natural Science Foundation of China [21375047, 21377046, 21575050, 21505051, 21607055]
- National Key Scientific Instrument and Equipment Development Project of China [21627809]
- Natural Science Foundation of Shandong Province [ZR2013EMQ001]
- Science and Technology Development Plan of Shandong Province [2014GSF120004]
- Special Project for Independent Innovation and Achievements Transformation of Shandong Province [2014ZZCX05101]
- Special Foundation [ts20130937]
Ask authors/readers for more resources
Magnetic hydroxyapatite-immobilized oxidized multi-walled carbon nanotubes (mHAP-oMWCNTs), an excellent adsorbent for Pb(II) and methylene blue (MB) removal, was synthesized in the present work. It was characterized by SEM, XRD, FTIR, BET, TGA and zeta potential analysis. mHAP-oMWCNTs displayed better adsorption performance than mHAP, mMWCNTs and HAP-oMWCNTs. The adsorption of Pb(II) and MB mainly depend on the ion-exchange property of HAP and the abundant oxygenic functional groups on oMWCNTs surface. Besides, good magnetic performance of mHAP-oMWCNTs makes it easy to achieve the solid-liquid separation. The adsorption kinetic data described well with the pseudo-second-order model and the equilibrium data fitted well with Frendlich and Langmuir isotherms for Pb(II) and MB, respectively. The maximum adsorption capacity was 698.4 mg g(-1) for Pb(II) and 328.4 mg g(-1) for MB from Langmuir isotherm. Thermodynamic studies (Delta G < 0, Delta H > 0, Delta S > 0) implied the both adsorption was endothermic and spontaneous process. Furthermore, the excellent reusability of mHAP-oMWCNTs was confirmed by the desorption experiments. All the results showed mHAP-oMWCNTs has a promising application in water treatment. (C) 2017 Published by Elsevier Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available