摘要
以异佛尔酮二异氰酸酯 (IPDI)作交联剂 ,通过静电脉冲液滴技术制备了海藻酸钠 /IPDI凝胶微球。作为一种新型的离子吸附剂 ,海藻酸钠 /IPDI凝胶微球对Pb2 +具有较高的去除率 (最大为 99 5 7% ) ,很强的富集能力、较低的极限吸附浓度 (0 4 3 4 μmol/L)和较高的质量交换量 (饱和交换量为 :Pb 3 82 6mg/g在干海藻酸钠 /IPDI中 )。其离子交换速率比传统离子交换树脂快得多。动态吸附实验结果表明 ,海藻酸钠 /IPDI微球对Pb2 +的吸附选择性远远大于Ca2 +。
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 Pb 2+, 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 Pb 2+, showing a promising application in adsorption of heavy metal ions in human blood.
出处
《应用化学》
CAS
CSCD
北大核心
2003年第2期112-116,共5页
Chinese Journal of Applied Chemistry
基金
国家高技术航天领域 863 2基金资助项目 ( 863 2 7 2 11)
