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Chemically functionalized activated carbon with 8-hydroxyquinoline using aryldiazonium salts /diazotization route: green chemistry synthesis for oxins-carbon chelating resins
Arabian Journal of Chemistry ( IF 6 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.arabjc.2017.11.010
Nawader F. AlQadhi , Awadh O. AlSuhaimi

Abstract The past few years witnessed the emergence of aryldiazonium salts as versatile coupling agents for the functionalization of carbon and other substrates. Although the approach has demonstrated extensive applications in many fields, its use for the synthesis of chelating resins has not been explored. In this work, the concept has been exploited to develop an ecofriendly synthetic method for carbon based chelators. Herein, the p-nitroanline aryldiazonium salt was generated (in situ) in presence of hypophosphorous acid and covalently grafted onto activated carbon (AC) to allow addition of 8-hydroxyquinoline (8-HQ) via diazo coupling. The successfulness of the functionalization was confirmed by DRIR, XPS, and TGA. The risen was packed into cartridges and used with standard solid phase extraction (SPE) apparatus for the extraction of trace metals; Cd(II), Ni(II), Mn(II), Zn(II) and Pb(II) from groundwater samples prior to their measurement by ICPMS. The resin exhibited more 50% enhancement in capacity exchange relative to the plain AC. Under the optimum conditions the sorption capacity of the sorbent was 0.393, 0.170, 0.345, 0.092, 0.314 mmol g−1 for Mn(II), Cd(II), Ni(II), Pb(II) and Zn(II) respectively. The sorbent showed efficient performance when applied for SPE of trace metals from groundwater certified reference materials BCR-609 and groundwater real samples from AlMadinah AlMumnawarah, Saudi Arabia.

中文翻译:

使用芳基重氮盐/重氮化路线用8-羟基喹啉化学功能化活性炭:oxins-碳螯合树脂的绿色化学合成

摘要 过去几年见证了芳基重氮盐作为用于碳和其他底物官能化的多功能偶联剂的出现。尽管该方法已在许多领域得到广泛应用,但尚未探索其在螯合树脂合成中的应用。在这项工作中,该概念已被用于开发一种环保的碳基螯合剂合成方法。在此,对硝基苯胺芳基重氮盐在次磷酸存在下(原位)生成并共价接枝到活性炭(AC)上以允许通过重氮偶联添加 8-羟基喹啉(8-HQ)。DRIR、XPS 和 TGA 证实了功能化的成功。上升液装入小柱,与标准固相萃取(SPE)装置配合使用,用于微量金属的萃取;使用 ICPMS 测量之前地下水样品中的 Cd(II)、Ni(II)、Mn(II)、Zn(II) 和 Pb(II)。与普通 AC 相比,树脂的容量交换提高了 50% 以上。在最佳条件下,吸附剂对Mn(II)、Cd(II)、Ni(II)、Pb(II)和Zn(II)的吸附容量分别为0.393、0.170、0.345、0.092、0.314 mmol g-1 . 该吸附剂在用于地下水认证参考材料 BCR-609 中的痕量金属和沙特阿拉伯 AlMadinah AlMumnawarah 的地下水实际样品的 SPE 时表现出高效的性能。与普通 AC 相比,树脂的容量交换提高了 50% 以上。在最佳条件下,吸附剂对Mn(II)、Cd(II)、Ni(II)、Pb(II)和Zn(II)的吸附容量分别为0.393、0.170、0.345、0.092、0.314 mmol g-1 . 该吸附剂在用于地下水认证参考材料 BCR-609 中的痕量金属和沙特阿拉伯 AlMadinah AlMumnawarah 的地下水实际样品的 SPE 时表现出高效的性能。与普通 AC 相比,树脂的容量交换提高了 50% 以上。在最佳条件下,吸附剂对Mn(II)、Cd(II)、Ni(II)、Pb(II)和Zn(II)的吸附容量分别为0.393、0.170、0.345、0.092、0.314 mmol g-1 . 该吸附剂在用于地下水认证参考材料 BCR-609 中的痕量金属和沙特阿拉伯 AlMadinah AlMumnawarah 的地下水实际样品的 SPE 时表现出高效的性能。
更新日期:2020-01-01
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