废弃茶叶茶多酚的提取及其粗提物对水中铜离子的吸附效果
Extraction of Tea Polyphenols from Waste Tea and the Absorption Efficiency of its Crude Extracts to Copper Ion in Water
石艳梅 1石珉玥 2伍庆 3郭晓青 4郭丽 3王娇3
作者信息
- 1. 贵阳市第三实验中学，贵州贵阳550001
- 2. 上海师范大学，上海200234
- 3. 贵州师范大学，贵州贵阳550001
- 4. 贵阳护理职业学院，贵州贵阳550008
- 折叠
摘要
[目的]研究废弃茶叶中茶多酚的提取工艺以及茶渣制成的活性炭对污水中铜离子的吸附作用。[方法]采用 L9（34）正交试验优化提取茶多酚的最佳条件。用制备茶多酚的茶渣制备活性炭，测定茶多酚和活性炭对水中铜离子的吸附效果。[结果]茶多酚的最佳提取条件为料液比1∶30，提取温度97℃，提取时间20 min，且茶多酚对铜离子的络合沉淀能力为38．50 mg／g，活性炭对铜离子也具有一定吸附作用，其吸附能力为2．64 mg／g。[结论]茶园废弃茶叶中提取的茶多酚以及茶渣活性炭对铜离子均有较强的清除作用，该方法为茶园废茶资源的循环利用提供了参考。
Abstract
Objective] To study the extraction technology of tea polyphenols from recycling waste tea and the absorption efficiency of its crude extracts to copper ion in water.[Method] L9(34) orthogonal test was used to optimize the extraction condition for tea polyphenols.After pre-paring the tea polyphenols, tea residue was used to prepare activated carbon.Absorption efficiency of tea polyphenols and activated carbon to copper ion in water was detected.[ Result] The optimal extraction conditions for tea polyphenols were as follows: 1∶30 solid-liquid ratio, 97 ℃ extraction temperature, 20 min extraction time.Complexation precipitation ability of tea polyphenols to copper ion was 38.50 mg/g. Activated carbon also had certain adsorption to copper ion with the adsorption capacity being 2.64 mg/g.[Conclusion] Tea polyphenols ex-tracted from the waste tea in tea garden and the activated carbon in tea residue have relatively strong scavenging action.This method provides references for the cyclic utilization of waste tea resources in tea garden.
关键词
茶园废茶/茶多酚/活性炭/铜离子/再生利用Key words
Waste tea in tea garden/Tea polyphenols/Activated carbon/Copper ions/Recycling引用本文复制引用
基金项目
贵州省科学技术基金(黔科合 J字20142002号)
贵州省科技计划项目(黔科合重大专项字20136006－3号)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据