【摘要】 以电纺尼龙6纳米纤维膜为基底,原位氧化聚合制得聚吡咯/尼龙6纳米纤维膜（PPy/Nylon 6-NFsM）。通过静态和动态吸附实验考察PPy/Nylon 6-NFsM对pb²⁺的吸附行为,探究其作为固相萃取介质富集水中痕量pb²⁺的可行性。结果表明:298 K,pH=10时,PPy/Nylon 6-NFsM对pb²⁺的静态饱和吸附量达542 mg/g;吸附动力学和吸附等温线分别符合准二级动力学模型和Freundlich模型;优化了PPy/Nylon 6-NFsM的固相萃取条件,采用火焰原子吸收光谱法检测实际水样中的pb²⁺,检出限为1.2μg/L（信噪比为3计）10μg/L加标水平加标回收率为95.3%¹00.4%,相对标准偏差（RSD）为1.6%（n=3）可实现实际水样中痕量Pb²⁺的准确、灵敏的检测。更多还原

【Abstract】 Polypyrrole/Nylon 6 core-shell Nanofibers mat（PPy/Nylon 6-NFSM）,prepared via situ polymerization on nylon6 electrospun nanofibers mat template,was used as an adsorbent to remove Pb²⁺ from aqueous solutions.To study the adsorption characteristics of PPy/Nylon 6-NFSM on Pb²⁺,the work focused on two parts,dynamic adsorption and static adsorption.The investigation explored the possibility of PPy/Nylon 6-NFSM as an efficient solid phase extraction（SPE） adsorbent for the separation and enrichment of trace Pb²⁺ in water samples.The experiment results showed that the maximum static adsorption capacity of PPy/Nylon 6-NFSM for Pb²⁺ was 542.1 mg/g at 298 K in pH=10 solution.The adsorption process could be well fitted with the pseudo-second-order kinetic model,the adsorption equilibrium data accorded with Freundlich isotherm model.Under the optimum conditions,PPy/Nylon 6-NFSM was used as adsorbent in SPE coupled with Flame atomic spectrophotometer（AA-7000） for the determination of Pb²⁺ in water samples.The limits of detection of the method were 1.2 μg/L（S/N=3）,the recoveries of spiked water samples at concentration of 10 μg/L were 95.3%-100.4%with RSD of 1.6%.The method is accurate and sensitive in detection of trace concentrations of Pb²⁺ in water sample.更多还原