摘要
以改性绿茶为吸附材料,探索了改性剂、改性剂浓度、染料的初始浓度、吸附时间、吸附温度等因素对改性绿茶吸附碱性品红,的影响,确定了改性绿茶最佳吸附条件。实验结果表明,绿茶经改性剂改性选出最佳改性剂为环氧氯丙烷,最佳改性剂浓度为0.015 mol·L^(-1),碱性品红初始质量浓度为20 mg·L^(-1)时吸附量最大,最佳吸附温度为30℃,吸附时间240 min为最好,最大吸附量为53.6 mg·g^(-1)。在描述改性绿茶对碱性品红吸附的动力学行为上,准一级动力学曲线更好;在等温吸附方面,改性绿茶对碱性品红的吸附行为非常符合Langmuir模型,改性绿茶对碱性品红的吸附为单分子层吸附。
Green tea was modified by chemical reagents for preparing biosorbent to remove basic fuchsine in waste water. Effects of chemical reagents, relative concentration, initial concentration of basic fuchsine, adsorption time, temperature on the adsorption capacity and adsorption kinetics were investigated for optimum condition analysis. Results showed that the best chemical reagent was epichlorohydrin. The optimum concentration was 0.015 mol·L^-1. The optimum initial concentration of basic fuchsine was 20 mg·L^-1. The optimum temperature was 30℃. The optimum absorption time was 240 min. The maximum absorption capacity of the modified green tea reached 53.6 mg·g^-1. The adsorption kinetics followed the pseudo- first-order kinetic model. According to the isothermal adsorption of fuchsin basic adsorption with modified green tea, the Langmuir model was suitable for application. The adsorption of fuchsin basic by modified green tea belongs to single molecule layer adsorption.
出处
《茶叶科学》
CAS
CSCD
北大核心
2016年第6期639-645,共7页
Journal of Tea Science
基金
浙江省科技计划项目(2014C32124)
浙江省纤维材料和加工技术研究重点实验室开放基金(2015002)
化学工程与技术浙江省重中之重(一级)学科开放基金(YR2015002)
关键词
改性绿茶
碱性品红
吸附
动力学
modified green tea
fuchsin basic
absorption
kinetics
