Citation: LIU Jing-Jing, LI Xiao-Qing, CUI Meng-Jing, RONG Fei, XU Qian. Research on Adsorption of Pb²⁺ from Aqueous Solutions Using Polypyrrole/Nylon 6 Nanofibers Mat[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(1): 138-145. doi: 10.11895/j.issn.0253-3820.150785 shu

Research on Adsorption of Pb²⁺ from Aqueous Solutions Using Polypyrrole/Nylon 6 Nanofibers Mat

LIU Jing-Jing ^1,2 ,
LI Xiao-Qing ^1,2 ,
CUI Meng-Jing ^1,2 ,
RONG Fei ³ ,
XU Qian ^1,2,3,,

1.
¹ School of Public Health, Southeast University, Nanjing 210009, China;
2.
² Key Laboratory Environmental Medicine Engineering, Ministry of Education, Southeast University, Nanjing 210009, China;
3.
³ Suzhou Key Laboratory of Environmental and Biosafety, Southeast University, Nanjing 215123, China

Corresponding author: XU Qian,
Received Date: 15 July 2015
Available Online: 4 November 2015
Fund Project: 本文系国家自然科学基金项目(Nos.81172721,81473019) (Nos.81172721,81473019)苏州市纳米技术专项项目(No.ZXG2013026)资助 (No.ZXG2013026)

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.
- Polypyrrole/Nylon 6-nanofibers mat,
- Lead,
- Adsorption,
- Solid phase extraction
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