改性绿茶去除水中碱性品红的研 究.pdfVIP

茶叶科学 2016 ，36 （6 ）：639~645 Journal of Tea Science 投稿平台： 改性绿茶去除水中碱性品红的研究 李卓厉，蔡晓敏，徐仪洁，阮暻悦，郑群雄，熊春华* 浙江工商大学食品与生物工程学院，浙江 杭州 310018 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。 关键词：改性绿茶；碱性品红；吸附；动力学 中图分类号：TS272.5+ 1 文献标识码：A 文章编号：1000-369X（2016 ）06-639-07 Adsorption of Basic Fuchsine by Modified Green Tea * LI Zhuoli, CAI Xiaomin, XU Yijie, YUAN Jingyue, ZHENG Qunxiong, XIONG Chunhua School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China Abstract: 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. -1 Results showed that the best chemical reagent was epichlorohydrin. The optimum concentration was 0.015 mol·L . 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