@article{(Open Science Index):https://publications.waset.org/pdf/9997951,
	  title     = {Functionalized PU Foam for Water Filtration},
	  author    = {Nidal H. Abu-Zahra and  Subhashini Gunashekar},
	  country	= {},
	  institution	= {},
	  abstract     = {Polyurethane foam is functionalized with Sulfonic acid groups to remove lead ions (Pb2+) from drinking water through a cation exchange process. The synthesis is based on addition polymerization of the -NCO groups of an isocyanate with the –OH groups of a polyol to form the urethane. Toluene-diisocyanateis reacted with Polypropylene glycol to form a linear pre-polymer, which is further polymerized using a chain extender, N, N-bis(2-hydorxyethyl)-2-aminoethane-sulfonic acid (BES). BES acts as a functional group site to exchange Pb2+ ions. A set of experiments was designed to study the effect of various processing parameters on the performance of the synthesized foam. The maximum Pb2+ ion exchange capacity of the foam was found to be 47ppb/g from a 100ppb Pb2+ solution over a period of 60 minutes. A multistage batch filtration process increased the lead removal to 50-54ppb/3g of foam over a period of 90 minutes.
},
	    journal   = {International Journal of Materials and Metallurgical Engineering},
	  volume    = {8},
	  number    = {4},
	  year      = {2014},
	  pages     = {273 - 278},
	  ee        = {https://publications.waset.org/pdf/9997951},
	  url   	= {https://publications.waset.org/vol/88},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 88, 2014},
	}