摘要
对壳聚糖(CTS)进行了两亲改性,通过响应曲面实验对比各因素对取代度影响的显著程度且优选出最佳的制备条件,并采用3种两亲性CTS进行了表面改性气浮(PosiDAF)除藻实验,对比了不同条件下的除藻效果且探究除藻机理.结果表明,两亲性CTS水溶性增强,但热稳定性降低;对响应值影响的显著程度为:碳链长度>反应时间>反应温度>原料投加比;以丁基N-2羟丙基三甲基壳聚糖氯化铵(C4-HTCC)为改性剂,投加量为1.0mg/L时改性气浮除藻效果最佳,可达93.47%,源于其改性的微气泡具有较强的静电吸引作用.
Three amphiphilic CTS were used for PosiDAF algal removal experiment,and the algal removal effects under different conditions were compared to explore the algal removal mechanisms.The results showed that the amphiphilic modification can enhance the water solubility of CTS while reduce the thermal stability of CTS.The significant degree of influence on the responding value(substitution degree)was as follows:carbon chain length>reaction time>reaction temperature>raw material feeding ratio.When the 1.0mg/L N-2hydroxypropyl trimethyl chitosan ammonium chloride(C4-HTCC)was used as modifier,the effectiveness of algae removal was the best,reaching 93.47%;because the modified microbubbles have strong electrostatic attraction.
作者
王永磊
王兴林
李亚男
金丽
邵明睿
吕炳琪
齐浩然
薛洁
WANG Yong-lei;WANG Xing-lin;LI Ya-nan;JIN Li;SHAO Ming-rui;LYU Bing-qi;QI Hao-ran;XUE Jie(School of Muncipal and Environment,Shandong Jianzhu University,Jinan 250101,China;Faculty of Architecture,Civil and Transportation Engineering.Beijing University of Technology,Beijing 100124,China;Water Resources Research Institute of Shandong Province,Jinan 250014,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2022年第8期3704-3712,共9页
China Environmental Science
基金
山东省自然科学基金资助项目(ZR2020ME221)
潍坊市科技发展计划项目(2020ZJ1320)。
关键词
改性气浮
壳聚糖改性
微气泡表面改性
响应曲面法
黏附机理
影响因素
PosiDAF
chitosan modification
surface modification of microbubbles
response surface method
adhesion mechanism
influencing factors
