An efficient calix[4]arene appended resin for the removal of arsenic

The present article represents As(III) and As(V) sorption behavior of calix[4]arene appended resins (4 and 5). It has been evaluated that resin 5 possesses greater interaction for As(III) with maximum sorption (97% at pH 1) as compared to As(V) (89% at pH 7). Similarly, it has been noticed that the...

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Bibliographic Details
Published in:Desalination 2011-09, Vol.278 (1), p.98-104
Main Authors: Qureshi, Imdadullah, Qazi, Mansoor Ahmed, Bhatti, Asif Ali, Memon, Shahabuddin, Sirajuddin, Yilmaz, Mustafa
Format: Article
Language:English
Subjects:
Applied sciences
arsenic
Arsenic sorption
Breakthrough
Calixarene
desalination
Desorption
Exact sciences and technology
Intervals
Pollution
Polymers
Regeneration
Resins
Solid-phase extraction
Sorbates
Sorption
Yoon and Nelson model
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Summary:The present article represents As(III) and As(V) sorption behavior of calix[4]arene appended resins (4 and 5). It has been evaluated that resin 5 possesses greater interaction for As(III) with maximum sorption (97% at pH 1) as compared to As(V) (89% at pH 7). Similarly, it has been noticed that the behavior of resin 4 is opposite to the resin 5. Its interaction with As(V) is greater (95% sorption at pH 5) than for As(III) (68% sorption at pH 1). Sorption process was also explored through FT-IR technique, which shows good interaction between sorbent and sorbate. Concerning regeneration ability, resin 4 was found to be more efficient than 5 and could be used repeatedly for the sorption of both As(III) and As(V) effectively. Best regeneration was achieved by using 0.1 M NaOH solution for desorption. The sorption process for both resins needs a very short time interval (15 to 20 min) with maximum sorption capacity (i.e. > 95%). [Display omitted] ► Calix[4]arene modified Merrifield resin has been applied for arsenic sorption. ► The resin has shown 97% extraction efficiency through solid phase extraction. ► Sorption process has been evaluated through. Bohart–Admes and Yoon–Nelson models.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2011.05.007