Preparation of iminodiacetic acid functionalized multi-walled carbon nanotubes and its application as sorbent for separation and preconcentration of heavy metal ions
| Autor: | Mingfei Pan, Guozhen Fang, Xiao-xing Ma, Junping Wang, Xiaoke Ye, Shuo Wang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
Sorbent Iminodiacetic acid Health Toxicology and Mutagenesis Metal ions in aqueous solution Analytical chemistry chemistry.chemical_compound symbols.namesake Adsorption Metals Heavy Spectroscopy Fourier Transform Infrared Environmental Chemistry Solid phase extraction Waste Management and Disposal Inductively coupled plasma mass spectrometry Detection limit Nanotubes Carbon Chemistry Imino Acids Solid Phase Extraction Langmuir adsorption model Hydrogen-Ion Concentration Pollution Kinetics symbols Thermodynamics Indicators and Reagents Algorithms Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 186:1985-1992 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2010.12.087 |
| Popis: | In this paper, a novel material was prepared with functionalizing multi-walled carbon nanotubes (MWCNTs) using iminodiacetic acid (IDA) and characterized by FT-IR. Isotherm and kinetics of adsorption were studied and the experimental data fitted the Langmuir model and pseudo-second-order equation very well. An on-line method for simultaneous determination of trace V (V), Cr (VI), Pb (II), Cd (II), Co (II), Cu (II) and As (III) in biological samples was developed using this material as sorbent coupled with inductively coupled plasma mass spectrometry (ICP-MS). A series of experimental parameters, including sample pH, sample flow rate and loading time, eluting solution and the effect of interfering ions have been investigated systematically. Under the optimum experimental conditions, the enrichment factors for above metal ions were ranged from 66 to 101. Detection limit (3 s) was achieved at 1.3, 1.2, 0.70, 0.40, 2.5, 3.4, 0.79 ng L−1, respectively. At the 1.0 μg L−1 level, the precision (RSD, %) for 11 replicate measurements was from 1.0 to 4.0. In spiked biological samples, good recoveries (n = 3) were obtained in the range of 90–110%. These results had proved that the proposed method was with good accuracy and could be applied to the analysis of trace metal ions in biological samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect