落叶松鞣质吸附甲醛的特性研究  

Adsorption Mechanism of Formaldehyde by Larch tannin

作　　者：苏小舟 董赵勇 SU Xiao-zhou;DONG Zhao-yong(College of Textile,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院纺织学院,河南郑州450007

出　　处：《化学试剂》2021年第10期1428-1433,共6页Chemical Reagents

基　　金：中国纺织工业联合会科技指导性项目(2018044);中原工学院基本科研业务费专项资金项目(K2019YY003)。

摘　　要：采用落叶松鞣质作为吸附剂,考察了反应温度、pH值等因素对落叶松鞣质吸附甲醛性能的影响。实验结果表明:在未调节pH值的情况下,落叶松鞣质与甲醛的最佳反应温度为35℃,此时对甲醛的吸附效果最好,对应的甲醛去除率为39.3%;保持最佳反应温度不变,pH 12时,落叶松鞣质吸附甲醛的效果最好,甲醛去除率为98.2%。pH值对落叶松鞣质吸附甲醛的影响最大。但在弱碱环境中,落叶松鞣质吸附甲醛的性能受到一定程度的抑制。红外光谱、微分热重以及气质联用色谱对落叶松鞣质与甲醛反应前后的试验分析表明,落叶松鞣质与甲醛发生了加成反应,反应后落叶松鞣质的热稳定性有所降低。Using larch tannin as adsorbent,the effects of reaction temperature,pH value and other factors on the adsorption of formaldehyde by larch tannin were investigated.The experimental results showed that the optimal reaction temperature of larch tannin and formaldehyde is 35℃without adjusting the pH value,at this time,the adsorption effect of formaldehyde is the best,and the corresponding formaldehyde removal rate is 39.3%.When pH 12 and keeping the optimal reaction temperature unchanged,the adsorption effect of larch tannin is the best,and the formaldehyde removal rate is 98.2%.Among them,pH value had the greatest influence on formaldehyde adsorption by larch tannin.However,the adsorption of formaldehyde by larch tannin in weak alkaline environment was inhibited to some extent.The results of IR,TG-DSC and GC-MS showed that there was an addition reaction between larch tannic and formaldehyde,and the thermal stability of larch tannin was decreased after the reaction.

关 键 词：落叶松鞣质 甲醛 去除率 加成反应 吸附 

分 类 号：X701[环境科学与工程—环境工程]