己二酸/硫酸掺杂聚苯胺对Cr(Ⅵ)的吸附行为  

Adsorption Behavior of Adipic/sulfuric Acid Doped Polyaniline for Cr(Ⅵ)

作　　者：蔡雨晴 章东雪 周娇 周进康 孔垂灿 李玉驳 刘应科 CAI Yu-qing;ZHANG Dong-xue;ZHOU Jiao;ZHOU Jin-kang;KONG Chui-can;LI Yu-bo;LIU Ying-ke(College of Chemistry and materials,Guizhou Normal University,Guiyang 550018,China;Guiyang Shendi Chemical Co.,Ltd.,Guiyang 550018,China)

机构地区：[1]贵州师范学院化学与材料学院,贵州贵阳550018 [2]贵阳神迪化工有限公司,贵州贵阳550018

出　　处：《化学试剂》2023年第5期148-154,共7页Chemical Reagents

基　　金：贵州省科技计划项目((2019)1252,ZK(2021)一般254);黔研合平台人才项目((2019)5778-08)。

摘　　要：为了研究己二酸掺杂聚苯胺对重铬酸钾溶液的吸附行为,以己二酸(AA)、硫酸为混合掺杂剂,采用化学氧化聚合法合成了己二酸/硫酸掺杂聚苯胺(PANI@H/AA)。采用FT-IR、SEM及EDS方法对其结构进行了表征,考察了苯胺与己二酸物质的量比、吸附液初始浓度、吸附时间、pH值对Cr(Ⅵ)吸附行为的影响。分析了PANI@H/AA对Cr(Ⅵ)的吸附行为特征。结果表明,n(苯胺)∶n(己二酸)=5∶2时,PANI@H/AA显示出优异的吸附效果,其对Cr(Ⅵ)的吸附行为符合Langmuer单分子层和准二级动力学吸附模型。对Cr(Ⅵ)的吸附行为主要是掺杂聚苯胺中的—N^(+)正离子以及酸性条件下质子化的亚氨基对HCrO_(4)^(-)、Cr_(2)O_(7)^(2-)的静电吸引作用。PANI@H/AA能够对废水中Cr(Ⅵ)进行有效去除,并具有较好的重复使用性能。In order to study the adsorption behavior of adipic acid doped polyaniline on potassium dichromate solution,adipic acid doped polyaniline was prepared by oxidative polymerization using aniline as raw materials,apic acid/sulfuric acid doped polyaniline(PANI@H/AA)was synthesized by chemical oxidation polymerization by using adipic acid(AA)and sulfuric acid as mixed dopants.The Flourier transform infrared spectroscopy(FT-IR),scanning electron microscope(SEM)and EDS were used to determine that AA was effectively doped on PANI structure was formed.The effects of aniline/adipic acid molar ratio,initial concentration of adsorbent,adsorption time and pH on Cr(Ⅵ)adsorption behavior were investigated.The characteristics of the adsorption behavior of adipic acid doped polyaniline(PANI@H/AA)on potassium dichromate solution was investigated,and the relevant mechanism were analyzed.The results showed that when the molar ratio of aniline to adipic acid was 5∶2,the PANI@H/AA showed outstanding adsorption effect.The adsorption behavior of Cr(Ⅵ)was consistent with the Langmuer monolayer and second-order kinetic adsorption model.The adsorption behavior of Cr(Ⅵ)was mainly due to the doping of—N^(+)positive ions in polyaniline and the electrostatic attraction of proton-induced imino to HCrO_(4)^(-) and Cr_(2)O_(7)^(2-) under acidic conditions.PANI@H/AA can effectively remove Cr(Ⅵ)from wastewater and had a good reuse performance.

关 键 词：己二酸 掺杂 聚苯胺 吸附 Cr(Ⅵ) 

分 类 号：TQ028.8[化学工程]