J4 ›› 2011, Vol. 41 ›› Issue (1): 241-246.

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Improvement of PVA-H3BO3 Immobilization Method with Inorganic Materials

BI Hai-Tao, ZHANG Lan-Ying, LIU Na, YANG Guo-jun, XU Guo-xin, SHU Bo-lin   

  1. College of Environment and Resources, Jilin University, Changchun 130026,China
  • Received:2010-04-07 Online:2011-01-26 Published:2011-01-26

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Abstract:

Inorganic materials such as activated carbon fiber, peat, vermiculite, kaoline, perlite, calcium base bentonite, activated charcoal and diatomite were employed as the modifier for PVA-H3BO3 immobilization method. A screened atrazine degradation bacterium was embedded to make bio-beads and the impact of above describedinorganic materials on atrazine removal capacity and the swelling of bio-beads were investigated at 10℃. The results showed that the atrazine removal by unmodified bio-beads and kaoline modified bio-beads followed zero-order kinetics equation, while others followed first-order kinetics equation. The atrazine removal by activated charcoal modified bio-beads had the shortest half-life of 2.61 h and the atrazine removal by nitrifying peat modified bio-beads had the longest half-life of 39.93 h. According to the experiment and SEM analysis, peat modified by sodium hydroxide, diatomite, vermiculite, peat heated at 130℃, sulfonated peat, perlite modified bio-beads and bio-beads unmodified by inorganic material did not swell.

Key words: polyvinyl alcohol, boric acid, inorganic material, immobilization, atrazine

CLC Number: 

  • X505
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