Water contamination and its purification are a global problem. The current approach to purify water is reduction of impurities to acceptable levels. One of the ways to achieve this is by use of water-soluble polymers that extract organic and metallic contaminants, from water. This paper presents a blend of composite polymers that eliminates both the contaminants simultaneously by the principle of adsorption at lower critical solution temperature. These composite polymers have been synthesized by grafting poly(N,N-diethylacrylamide), poly(N-isopropylacrylamide) and poly(N-vinylcaprolactam) on-to the natural polymer chitosan or its derivatives, giving smart graft polymeric assemblies (GPAs). One of the graft polymers, GPA-2, exhibits excellent adsorption properties able to remove metal ions like cadmium, cobalt, copper, lead, iron and also organic impurities like chlorophenol and phthalic anhydride. Studies reveal that 6 mg/ml GPA-2 is able to effect a 100% removal of organic impurities – chlorophenol (50 ppm) and phthalic anhydride (70 ppm) – from water, while complete removal of the heavy metal ions (Cu+2, Co+2 and Cd+2) together at 30 ppm concentration has been achieved with 7.5 mg/ml GPA-2. The reduction in level of impurities along with recyclability and reproducibility in the elimination spectrum makes these assemblies promising materials in water treatment.
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Research Article|
December 21 2016
Novel thermoresponsive assemblies of co-grafted natural and synthetic polymers for water purification
Joginder Singh Paneysar;
Joginder Singh Paneysar
1Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Mumbai 400 098, India
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Stephen Barton;
Stephen Barton
2School of Pharmacy and Chemistry, Faculty of Science, Engineering and Computing, Kingston University-London, Kingston upon Thames, London KT1 2EE, UK
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Sudeshna Chandra;
Sudeshna Chandra
3Department of Chemical Sciences, School of Science, NMIMS University, Vile Parle (West), Mumbai 400056, India
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Premlata Ambre;
1Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Mumbai 400 098, India
E-mail: [email protected]
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Evans Coutinho
Evans Coutinho
1Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Mumbai 400 098, India
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Water Sci Technol (2017) 75 (5): 1084–1097.
Article history
Received:
August 12 2016
Accepted:
December 07 2016
Citation
Joginder Singh Paneysar, Stephen Barton, Sudeshna Chandra, Premlata Ambre, Evans Coutinho; Novel thermoresponsive assemblies of co-grafted natural and synthetic polymers for water purification. Water Sci Technol 8 March 2017; 75 (5): 1084–1097. doi: https://doi.org/10.2166/wst.2016.599
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