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交联聚丙烯腈螯合树脂对Pb(Ⅱ)的吸附及其在痕量分析中的应用 预览

Adsorption Behavior of Lead(Ⅱ) by Crosslinked Polyacrylonitrile and Its Application in Trace Analysis
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摘要 采用火焰原子吸收光谱法(FAAS)研究了交联聚丙烯腈螯合树脂对环境样品中Pb2+的吸附分离/富集行为,并考察了共存离子的干扰。结果表明,该树脂对Pb2+的吸附率在溶液pH=5.4、静态吸附时间1.5 h时室温下可达90%。在最佳吸附条件下,树脂对单一Pb2+的饱和吸附容量可达49.6 mg/g。以0.1 mol/L盐酸溶液作为解吸剂,可将吸附在树脂上的Pb2+定量洗脱,富集倍数和解吸率可分别达到50和97%。富集50倍后,方法的检出限(3σ10)为5.3μg/L;相对标准偏差(RSD)为2.1%;加标回收率为92.9%~97.6%。 A new method for the determination of Pb2+ in environmental water sample using crosslinked polyacrylonitrile as a solid-phase extractant and flame atomic absorption spectrometry(FAAS) as a sensitive detector has been developed.The adsorption of Pb2+ by crossslinked polyacrylonitrile and factors affecting the adsorption capacity were studied by AAS.The experimental results showed that at optimal adsorption conditions,e.g.,pH of adsorbate solution was 5.4,static adsorption time was 1.5 h and adsorption procedure was carried at room temperature,polyacrylonitrile as adsorbent has high adsorption capacity for Pb2+ which can reach 49.6 mg/g.Adsorption rate was 90% during the 1.5 h static adsorption time.Using 0.10 mol/L chloride acid as the desorption solvent to desorb the adsorbates,the enrichment factor and the recovery were 50 times and 97% respectively.Under enrichment factor of 50 times,the detection limits(3σ) was 5.3 μg/L and the relative standard deviation(RSD) was 2.1%.The established method was extended to the determination of environmental samples and the results were satisfactory(recovery was 92.9%~97.6%).These results indicate that the polymer has good regenerate capability.
作者 肖开提·阿布力孜 阿布力孜·伊米提 彭秧 王吉德 司马义·努尔拉 Shawket Abliz,Abliz Yimit,PENG Yang,WANG Jide,Ismayil Nurulla (College of Chemistry and Engineering,Xinjiang University,Urumqi 830046)
出处 《应用化学》 CAS CSCD 北大核心 2011年第9期 1082-1086,共5页 Chinese Journal of Applied Chemistry
基金 国家自然科学基金(20674066)资助项目
关键词 聚丙烯腈螯合树脂 吸附 铅离子 原子吸收光谱法 polyacrylonitrile adsorption lead atomic absorption spectrometry
作者简介 通讯联系人:司马义·努尔拉,教授;Tel/Fax:0991-8583575;E-mail:ismayilnu@sohu.corn;研究方向:功能高分子材料合成及其应用
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