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Synthesis of a novel isatin and ethylenediamine modified resin and effective adsorption behavior towards Orange G

机译：一种新型甲醇和乙二胺改性树脂的合成及其对橙色G的有效吸附行为

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In this study, a novel crosslinked resin 135-I-EDA modified by isatin and ethylenediamine was synthesized through two continuous functionalization steps using chloromethylated styrene-divinylbenzene copolymer as the substrate. In the first step, the cross-linking reaction and isatin incorporation were realized in a creative one-pot reaction using Friedel–crafts reaction in the presence of isatin to give resin 135-I; in the second step, ethylenediamine was successfully introduced on the carbonyl of the modified isatin to further increase the chemically interacting sites. The double-modified resin 135-I-EDA displayed the best adsorption performance (113.38 mg g ~(?1) ) towards Orange G, which is 1.99 times and 3.49 times as much as that of 135-I (56.94 mg g ~(?1) ) and commercial resin H-103 (32.51 mg g ~(?1) ) respectively. This is attributed to its superior porous structure formed in the Friedel–crafts reaction and multiple modified groups in isatin and ethylenediamine. π–π conjugation and hydrogen bonding are the main driving forces for the adsorption. The pseudo-second-order rate equation characterizes the adsorption kinetic curves well and 135-I-EDA displayed the fastest adsorption rate. The study also proved that the 135-I-EDA has a better adsorption capacity for OG in more acidic solution, at higher temperature and higher salinity, which provides a basis for the treatment of industrial dye wastewater.
机译：在该研究中，通过使用氯甲基化苯乙烯 - 二乙烯基共聚物作为基质，通过两种连续官能化步骤合成了由Isatin和乙二胺改性的新型交联树脂135-I-EDA。在第一步中，在Isatin存在下使用Friedel-Crafts反应在Isatin的反应中实现交联反应和Isatin掺入，得到树脂135-i;在第二步中，成功地将乙二胺在改性的等素的羰基上引入，以进一步增加化学相互作用位点。双改性树脂135-I-EDA展示了橙色G的最佳吸附性能（113.38mg g〜（α1）），这是1.99倍和135-i（56.94mg g〜（ ？1））和商业树脂H-103（32.51mg g〜（α1））。这归因于其在Friedel-Crafts反应中形成的优异多孔结构，以及在Isatin和乙二胺中的多种改性基团中形成。 π-π共轭和氢键是吸附的主要驱动力。伪二阶速率方程表征吸附动力学曲线阱，135-I-EDA显示最快的吸附速率。该研究还证明，135-I-EDA在更酸性的溶液中具有更好的吸附能力，在更高的温度和更高的盐度下，为工业染料废水提供了依据。

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