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Sorption of As(III) by calix[4]arene modified XAD-4 resin: kinetic and thermodynamic approach

Content Provider	Springer Nature Link
Author	Memon, Shahabuddin Bhatti, Ashfaque Ali Bhatti, Asif Ali
Copyright Year	2014
Abstract	The present work describes the sorption behavior of a newly synthesized calix[4]arene impregnated XAD-4 resin, i.e., (IV) for the amputation of As(III) from aqueous environment. Resin IV was characterized by using FT-IR spectroscopy, scanning electron microscope, elemental and thermogravimetric analyses techniques. As(III) sorption was achieved through static method to assess the As(III) removal competency of impregnated resin IV under various conditions. Batch experiments were carried out to optimize several parameters such as effect of sorbent dosage, pH effect, contact time, initial arsenic concentration and temperature effect. From results it was observed that % sorption of As(III) is highly dependent on pH of solution. The maximum sorption was achieved at pH 4.5. Equilibrium was achieved in 45 min. From different isotherm models it has been deduced that As(III) sorption behavior of resin IV can be better explained by Langmuir with Q of 100 mmol/g and Temkin isotherm models. Furthermore, thermal study reveals that sorption process is temperature dependent. Kinetic studies found to follow second order and more appropriately Moris–Weber diffusion kinetic model. Besides this, resin IV has been utilized for the removal of arsenic from surface water samples. The field studies reveal that resin IV is an effective sorbent to treat and purify As(III) contaminated water.
Starting Page	727
Ending Page	735
Page Count	9
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	12
Issue Number	4
e-ISSN	17352428
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-09-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kinetic model Analytical Chemistry Physical Chemistry XAD-4 Impregnated resin Biochemistry Inorganic Chemistry As(III) Sorption isotherms Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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