壳聚糖/菠萝叶纳米纤维素复合气凝胶对刚果红的吸附性能  

Adsorption Properties of Chitosan/Pineapple Leaf Nanocellulose Composite Aerogel on Congo Red

作　　者：曹茵茵 钟鑫萍 谭明辉 谭广东 李昆太 CAO Yinyin;ZHONG Xinping;TAN Minghui;TAN Guangdong;LI Kuntai(College of Food Science and Technology,Guangdong Ocean University,Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety,Guangdong Province Engineering Laboratory for Marine Biological Products,Guangdong Provincial Engineering Technology Research Center of Seafood,Guangdong Provincial Engineering Technology Research Center of Prefabricated Seafood Processing and Quality Control,Zhanjiang 524088,China;Collaborative Innovation Center of Seafood Deep Processing,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]广东海洋大学食品科技学院,广东省水产品加工与安全重点实验室,广东省海洋生物制品工程实验室,广东省海洋食品工程技术研究中心,广东省水产预制食品加工与品质控制工程技术研究中心,广东湛江524088 [2]海洋食品精深加工关键技术省部共建协同创新中心,大连工业大学,辽宁大连116034

出　　处：《水处理技术》2025年第2期92-98,共7页Technology of Water Treatment

基　　金：广东省普通高校青年创新人才类项目(2023KQNCX028);广东海洋大学科研启动项目(060302042307)。

摘　　要：以废弃菠萝叶为主要原料,通过2,2,6,6-四甲基哌啶氧基催化体系下制备菠萝叶纳米纤维素,采用溶胶-凝胶法结合冷冻干燥技术定向构建壳聚糖/菠萝叶纳米纤维素气凝胶。通过红外光谱(FTIR)和扫描电镜(SEM)对复合气凝胶的结构进行表征,并探讨了不同壳聚糖配比、吸附剂用量和pH等因素对该复合气凝胶吸附水体中刚果红的影响规律。结果表明,复合气凝胶在壳聚糖添加量为80%、气凝胶用量为20 mg、温度为30℃、溶液pH=7的条件下吸附性能最好,吸附动力学和吸附等温线分别符合准二级动力学模型和Langmuir模型。进一步对吸附后的气凝胶进行FTIR和X射线光电子能谱(XPS)分析,结果表明复合气凝胶主要通过氢键和静电吸引等作用吸附刚果红。Chitosan pineapple leaf nanocellulose were prepared by 2,2,6,6-tetramethylpiperidinyloxy catalytic system under the pineapple leaves as the main raw material,and chitosan-pineapple leaf nanocellulose composite aerogel were constructed by sol-gel combined with freeze-drying method in the right direction.The structure of composite aerogel was characterized by infrared spectroscopy and scanning electron microscopy.The effects of different chitosan ratio,adsorbent amount,temperature and solution pH on the adsorption of Congo red in water by the composite aerogel were inverstigated,and the adsorption kinetics and adsorption isotherm models were constructed.The results showed that composite aerogel possessed the highest adsorption capacity under the conditions of chitosan percentage of 80%,aerogel usage of 20 mg,temperature of 30℃and pH=7.The adsorption process was better fitted by pseudo-second-order model and the Langmuir equation.Furthermore,the analysis of FTIR and X-ray photoelectron spectroscopy(XPS)for adsorbed aerogel showed that the adsorption of Congo red by the composite aerogel was mainly by hydrogen bonding and electrostatic attraction.

关 键 词：纳米纤维素 壳聚糖 复合气凝胶 刚果红 吸附 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]