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Citation: CHEN Yi-Qing, SUN Duo-Xian, LIU Jun. Preparation and Properties of Sodium Alginate/IPDI Gel Microspheres[J]. Chinese Journal of Applied Chemistry, ;2003, 20(2): 112-116. shu

Preparation and Properties of Sodium Alginate/IPDI Gel Microspheres

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072

Corresponding author: SUN Duo-Xian,
Received Date: 24 July 2002
Available Online: 21 November 2002
Fund Project: 国家高技术航天领域8632基金资助项目(86327211) (86327211)

Sodium alginate/IPDI(A-Na/IPDI) microspheres are prepared by exchanging calcium alginate (A-Ca)/IPDI gel microspheres, prepared by crosslinking of calcium alginate with isophorone diisocyanate(IPDI), with sodium citrate. When used for adsorbtion of Pb²⁺, the highest adsorption percentage of A-Na/IPDI gel microspheres is 99.57%. The limiting adsorption concentration is 0.434 μmol/L and the mass exchange capacity is 383 mg/g. Ion exchange velocity of A-Na/IPDI gel microspheres is much greater than that of chelating resin D418 and polyacrylate resin D113. A-Na/IPDI gel microspheres have rapid adsorption velocity and high selectivity for Pb²⁺, showing a promising application in adsorption of heavy metal ions in human blood.
- sodium alginate,
- ion adsorbent,
- microsphere,
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