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International Journal of Polymeric Materials and Polymeric Biomaterials Volume 65, 2016 - Issue 12
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Original Articles

Supermacroporous hybrid polymeric cryogels for efficient removal of metallic contaminants and microbes from water

Syed Muntazir AndrabiCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India
,
Jaya TiwariCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India
,
Samarjeet SinghCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India
,
Joyita SarkarCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, India
,
Nishith VermaCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
&
Ashok KumarCenter for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, India;Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, IndiaCorrespondence[email protected]
Pages 636-645 | Received 24 Oct 2015, Accepted 21 Feb 2016, Published online: 18 Apr 2016
 
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ABSTRACT

A supermacroporous cryogel column of chitosan-dimethylaminoethyl methacrylate (DMAEMA)-magnetite has been synthesized. The cationic and magnetic properties of chitosan/DMAEMA and magnetite, respectively, allow the adhesion of metals and microbes to the matrix. The large interconnected pores (20–100 µm) with porosity greater than 85% of the cryogels facilitate fast water movement. At lab scale (approximately 2 mL bed volume), static binding capacity of 100% (load: 4.5 ppm arsenic and 2300 ppm chromium) and dynamic binding capacity of 65% for arsenic (load: 58 ppm) was observed. The binding capacity at pilot scale (approximately 300 mL bed volume) was found to be 11.5 mg arsenic and 14.22 mg chromium. There was 100% binding of microbes (Escherichia coli and Streptococci) both at lab and pilot scale. The results were propitious and indicated the suitability of cryogel filter as a single device for the removal of arsenic, chromium, and microbes in field samples.

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