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首页> 外文期刊>Journal of Applied Polymer Science >Significantly improving the Cu2+ removal performance of conducting polymer-based adsorbent from aqueous solution through cross-linking modification
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Significantly improving the Cu2+ removal performance of conducting polymer-based adsorbent from aqueous solution through cross-linking modification

机译：Significantly improving the Cu2+ removal performance of conducting polymer-based adsorbent from aqueous solution through cross-linking modification

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摘要

Through cross-linking modification of poly(o-phenylenediamine) (PoPD) to increase the adsorption active sites, the Cu2+ adsorption capacity of PoPD was improved significantly. According to FT-IR, XRD, SEM and BET results, both PoPD and the cross-linked PoPD had porous or surface-adhesive porous morphology with a typical mesoporous character, the specific surface area of the latter was increased obviously from the former. Both of them showed excellent Cu2+ adsorption capabilities with the maximum adsorption q(max)(exp) of 76.51 and 85.49 mg center dot g(-1), and the corresponding removal ratios of 60.21 and 68.39, respectively. The adsorption capacity was increased to its 1.54 times with pentaerythritol tris3-(1-aziridinyl)propionate (cross-linking agent-III) as cross-linking agent at pH = 5 and 25 degrees C. Because temperature could affect the adsorption behavior of materials and the adsorption process is endothermic with Delta G < 0, the process should be accompanied by spontaneous chemical changes. The XRD, SEM-EDX mapping and XPS results showed that Cu2+ was successfully removed from the aqueous solution. Additionally, the adsorption was mainly based on the cation-pi interaction and the formation of Cu-N bonds.

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