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Inventors: Deng SB, Yu QA, Yu.G.
Patent Title: Preparation of chitosan molecular imprinting adsorbing agent
Publication date: 2008
Publication number: CN101298039

Abstract: The invention provides a preparation method for a print adsorbent of chitosan molecules, which relates to a preparation method for an adsorbent that can selectively remove perfluorooctane sulfonate (PFOS) in water. The preparation method adopts a molecular imprinting technique to construct a plurality of specific adsorption sites and the worthy adsorbent has remarkable selectivity adsorption to the PFOS in water. The method takes chitosan as raw material to prepare micro-cross linking chitosan beads; then the chitosan beads are printed with template molecules PFOS for 5 to 24 hours in an acid water solution, a mass ratio between the template molecules and the micro-cross linking chitosan beads is 0.005 to 0.06: 1, and reaction with a cross linker is carried out for 2 to12 hours after printing; the mass ratio between the volume of the cross linker and the micro-cross linking chitosan beads after being printed is 0.0125 to 0.119ml/g; finally, an organic solvent is used for eluting for 1 to 8 hours and the print adsorbent of chitosan molecules is obtained after freeze-drying. The adsorbent is suitable for adsorbing and removing PFOS in complicated water substances and is characterized by strong selectivity and being able to be reused.
URL: http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_gb&FT=D&date=20081105&CC=CN&NR=101298039A&KC=A

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