摘要
为了提高锆柱撑膨润土(Zirconium Pillar Bentonite,Zr-Bent)对刚果红(Congo Red,CR)的吸附速率和吸附能力,采用超声辅助Zr-Bent强化吸附CR,并建立吸附预测模型,优化其反应条件,探究超声辅助吸附机理。结果表明,相较于Zr-Bent单独处理,超声辅助Zr-Bent吸附可使吸附速率提高11倍,去除率提高10.3%。根据Box-Behnken响应面优化实验结果,当pH6.0、吸附时间为10 min、吸附剂投加量为1.5 g/L时,CR去除率可达99.6%。对建立的预测模型进行验证,CR实际去除率为99.8%,预测精度高。根据SEM、BET检测和吸附动力学分析,超声不但改变了吸附剂的结构,同时能加快化学吸附的液-固相传质过程。
In order to improve the adsorption rate and capacity of zirconium pillar bentonite(Zr-Bent)to Congo red,ultrasound is utilized to enhance the adsorption of Zr-Bent to Congo red.The adsorption prediction model is established to optimize the reaction conditions and explore the mechanism of ultrasound-enhanced adsorption.The results show that compared with Zr-Bent treatment alone,ultrasonic-enhanced Zr-Bent adsorption can increase the adsorption rate by 11 times and the removal rate by 10.3%.According to the results by Box-Behnken response surface optimization experiments,the removal rate of Congo red can reach 99.6%when p H=6.0,adsorption time is 10 min and adsorbent dosage is 1.5 g·L^(-1).The removal rate of Congo red can reach 99.8%when it is verified by the established prediction model,showing a high prediction accuracy.It is found through SEM,BET observation and adsorption kinetic analysis that ultrasound has changed the structure of the adsorbent and accelerated the liquid-solid mass transfer process of chemical adsorption.
作者
郝梦亚
朱薇
马姝雅
张晶
端允
HAO Meng-ya;ZHU Wei;MA Shu-ya;ZHANG Jing;DUAN Yun(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030000,China)
出处
《现代化工》
CAS
CSCD
北大核心
2021年第S01期163-168,共6页
Modern Chemical Industry
基金
山西省重点研发项目(社发领域)(201903D321055,201903D321057)
国家重点研发计划项目(2019YFC0408601,2019YFC0408602)
作者简介
郝梦亚(1996-),女,硕士研究生,研究方向为水处理技术,2630554378@qq.com;通讯联系人:端允(1977-),女,博士,副教授,研究方向为水处理技术,duanyun@tyut.edu.cn。
