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首页> 外文期刊>Environmental Monitoring and Assessment >Novel solid-phase extractor based on functionalization of multi-walled carbon nano tubes with 5-aminosalicylic acid for preconcentration of Pb(Ⅱ) in water samples prior to determination by ICP-OES
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Novel solid-phase extractor based on functionalization of multi-walled carbon nano tubes with 5-aminosalicylic acid for preconcentration of Pb(Ⅱ) in water samples prior to determination by ICP-OES

机译：基于多壁碳纳米管与5-氨基水杨酸官能化的新型固相萃取器，用于ICP-OES测定之前的水样中Pb（Ⅱ）的预浓缩

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摘要

New solid-phase extractor (MWCNTs-5-ASA) was synthesized via covalent immobilization of 5-aminsalicylic acid onto multi-walled carbon nanotubes (MWCNs). The success of the functionalization process was confirmed using Fourier transform infrared spectros-copy, scanning electron microscope, and surface coverage determination. Batch experiments were conducted as a function of pH to explore MWCNTs-5-ASA efficiency to extract several metal ions viz., Cn(Ⅲ), Fe(Ⅲ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), Cd(Ⅱ) and Pb(Ⅱ). It was found that Pb(Ⅱ) exhibits the highest extraction percentage with maximum adsorption capacity 32.75 mg g~(-1). Its binding performance was well fitted with Langmuir sorption isotherm. On the other hand, the selective separation and preconcentration of trace Pb(Ⅱ) under dynamic conditions prior to determination by inductively coupled plasma-optical emission spectrometry was investigated under different parameters. These included the rate of flow and volume of sample solution, in addition to the type of the eluate, its volume and concentration. The effect of a variety of foreign ions on the recovery percentage was also evaluated. Trace Pb(Ⅱ) ions present in 500 mL aqueous solution adjusted to pH 4.0 were retained on 50 mg of MWCNTs-5-ASA and completely eluted using 4.0 mL of 2 M HNO_3. The limit of detection and the precision of the method were 0.25 ng mL~(-1) and 2.8 %, respectively (N=5). This methodology has been applied for the determination of Pb(Ⅱ) in water samples with good results.
机译：通过将5-氨基水杨酸共价固定在多壁碳纳米管（MWCN）上，合成了新型固相萃取器（MWCNTs-5-ASA）。使用傅里叶变换红外光谱仪，扫描电子显微镜和表面覆盖率测定证实了功能化过程的成功。根据pH进行批处理实验，以探索MWCNTs-5-ASA提取几种金属离子的效率，即Cn（Ⅲ），Fe（Ⅲ），Co（Ⅱ），Ni（Ⅱ），Cu（Ⅱ），锌（Ⅱ），镉（Ⅱ）和铅（Ⅱ）。结果表明，Pb（Ⅱ）的提取率最高，最大吸附量为32.75 mg g〜（-1）。其结合性能与Langmuir吸附等温线非常吻合。另一方面，研究了在动态条件下痕量Pb（Ⅱ）在电感耦合等离子体发射光谱法测定之前在不同参数下的选择性分离和富集。除洗脱液的类型，体积和浓度外，这些还包括样品溶液的流速和体积。还评估了各种外来离子对回收率的影响。将500 mL水溶液中的痕量Pb（Ⅱ）离子调节至pH 4.0，将其保留在50 mg MWCNTs-5-ASA上，并使用4.0 mL 2 M HNO_3完全洗脱。方法的检出限和精密度分别为0.25 ng mL〜（-1）和2.8％（N = 5）。该方法用于水样中铅（Ⅱ）的测定，结果良好。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|10269-10280|共12页
  • 作者

    Ezzat M. Soliman; Hadi M. Marwani; Hassan M. Albishri;

  • 作者单位

    Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;

    Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia,Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;

    Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solid phase extraction; Lead; 5-Aminosalicylic acid; Preconcentration; ICP-OES; Selectivity;

    机译：固相萃取;铅;5-氨基水杨酸;预浓缩;ICP-OES;选择性;

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