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Green chemical method for the synthesis of chromogenic fiber and its application for the detection and extraction of Hg2+ and Cu2+ in environmental medium.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2018-10-21 , DOI: 10.1016/j.jhazmat.2018.10.051 Xiaoqing Wang 1 , Yan Lou 1 , Xinyan Ye 1 , Xuedan Chen 1 , Lei Fang 2 , Yinghao Zhai 1 , Yuqiang Zheng 1 , Chunhua Xiong 1
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2018-10-21 , DOI: 10.1016/j.jhazmat.2018.10.051 Xiaoqing Wang 1 , Yan Lou 1 , Xinyan Ye 1 , Xuedan Chen 1 , Lei Fang 2 , Yinghao Zhai 1 , Yuqiang Zheng 1 , Chunhua Xiong 1
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To advocate environment friendly detection idea, we adopted the green chemical method to synthesis the 1-(2 amino ethyl) piperidine functionalized polyacrylonitrile fiber (APF) and the chromogenic fiber 4-(2-pyridylazo) resorcinol (APF-PAR). The APF has high adsorption selectivity of Hg2+ and Cu2+, and the change of structure, surface morphology and thermo-stability before and after adsorption have been characterized by the infrared spectra, scanning electron microscope and thermogravimetric analysis. The APF achieved the adsorption equilibrium of Hg2+ just in 25 min and the adsorption capacity is 435.1 mg/g, while the adsorption equilibrium of Cu2+ costs 30 min and the adsorption capacity is 141.7 mg/g. The chromogenic fiber APF-PAR can recognize the Hg2+ and Cu2+ in 2 s, which benefits from the rapid mass transfer and small fluid resistance of the chelating PAN fiber. The color changed from orange to purplish red due to the variation of HOMO-LOMO energy gaps during the reaction which confirmed by the UV-vis absorption spectrum. It also has high selectivity and excellent adsorption performance, which provides more convenient, accurate, reliable and faster testing methods of Hg2+ and Cu2+ in environmental medium.
中文翻译：
绿色化学方法用于生色纤维的合成及其在环境介质中Hg2 +和Cu2 +的检测与提取中的应用。
为了倡导环境友好的检测理念，我们采用绿色化学方法合成了1-（2氨基乙基）哌啶官能化的聚丙烯腈纤维（APF）和发色纤维4-（2-吡啶基偶氮）间苯二酚（APF-PAR）。APF对Hg2 +和Cu2 +具有很高的吸附选择性，并通过红外光谱，扫描电子显微镜和热重分析表征了吸附前后的结构，表面形态和热稳定性。APF仅在25分钟内就达到了Hg2 +的吸附平衡，吸附量为435.1 mg / g，而Cu2 +的吸附平衡为30分钟，吸附量为141.7 mg / g。发色纤维APF-PAR可以在2 s内识别Hg2 +和Cu2 +，这得益于螯合PAN纤维的快速传质和小的流体阻力。由于反应过程中HOMO-LOMO能隙的变化，颜色从橙色变为紫红色，这由UV-vis吸收光谱证实。它还具有高选择性和出色的吸附性能，为环境介质中的Hg2 +和Cu2 +提供了更方便，准确，可靠和快速的测试方法。
更新日期：2018-10-22
中文翻译：
绿色化学方法用于生色纤维的合成及其在环境介质中Hg2 +和Cu2 +的检测与提取中的应用。
为了倡导环境友好的检测理念，我们采用绿色化学方法合成了1-（2氨基乙基）哌啶官能化的聚丙烯腈纤维（APF）和发色纤维4-（2-吡啶基偶氮）间苯二酚（APF-PAR）。APF对Hg2 +和Cu2 +具有很高的吸附选择性，并通过红外光谱，扫描电子显微镜和热重分析表征了吸附前后的结构，表面形态和热稳定性。APF仅在25分钟内就达到了Hg2 +的吸附平衡，吸附量为435.1 mg / g，而Cu2 +的吸附平衡为30分钟，吸附量为141.7 mg / g。发色纤维APF-PAR可以在2 s内识别Hg2 +和Cu2 +，这得益于螯合PAN纤维的快速传质和小的流体阻力。由于反应过程中HOMO-LOMO能隙的变化，颜色从橙色变为紫红色，这由UV-vis吸收光谱证实。它还具有高选择性和出色的吸附性能，为环境介质中的Hg2 +和Cu2 +提供了更方便，准确，可靠和快速的测试方法。
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