| 学术论文附件 | 无附件 |
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论文题目 | Tea steam as a sbent f removal of methylene blue aqueous solution | ||
| 作者姓名 | Tzan-Chain Lee,Shumao Wang, Zonggui Huang, Zhongxing Mo, Gangxing Wang, Zhuanrong Wu, Chengshun Liu, Hua Han, and Tzu-Hsing Ko | |||
| 是否发表 | 是 | 刊 号 | 2019（9）：9723763.（SCI，IF1.271） | |
| 期刊名称 | 期刊期次 | ISSN: 1687-8434 (Print) ISSN: 1687-8442 (Online) | ||
| 项目名称 | 渡远“中”门外——开创焕新国货，宜惠全球新时代 | |||
| 项目类型 | 创业实践项目 | |||
| 项目编号 | S202010389101S | 学科类别 | 管理学——管理科学与工程类 | |
| 立项年份 | 2020 | 联系QQ号 | 819251162 | |
| 项目组成员 | 姓 名 | 年 级 | 专 业 | 是否主持人 |
| 陈佳雯 | 2018 | 18级管理科学2班 | 第一主持人 | |
| 邱梓欣 | 2018 | 18级会计学2班 | 否 | |
| 黄燕娥 | 2018 | 18广告学 | 否 | |
| 刘成顺 | 2017 | 17茶学（茶学方向）1班 | 第二主持人 | |
| 吴易霖 | 2018 | 18茶学（茶学方向）1班 | 否 | |
| 指导老师 | 姓 名 | 职称 | 研究方向 | |
| 张巧珍 | 讲师 | 管理科学 | ||
| 陈乾 | 其他 | 工商管理 | ||
| 论文摘要 | The potentiality of tea stem for the adsorption of methylene blue (MB) from aqueous phase was investigated. A series of operating factors, including the initial MB concentration, contact time, pH of solution, dose of tea stem, and ionic strength of solution, were conducted to understand the effffect of adsorption of MB onto tea stem. Adsorption isotherm, kinetic models, thermodynamic investigation, and regenerability of tea stem were systematically investigated in this study. The experiment results revealed that the removal effiffifficiency decreased with MB concentration and the equilibrium time of adsorption at difffferent initial MB concentrations was approximately at 60 min. The appropriate dose of tea stem powder was found to be 4 g/L. The pHzpc of tea stem was evaluated and was observed to be 6.0 ± 0.2. The removal effiffifficiency increased with pH ranging from 3.0 to 5.0 and remained constantly at the pH range of 5.0–11.0. The pH affffected the adsorption because of the repellent power between H+ and dye cation. The ionic strength was found to have a negligible effffect on the adsorption. The Langmuir and Temkin isotherm models were found to be the best isotherm models to elucidate the adsorption mechanism between MB and tea stem powder. -e maximum adsorption capacity of 103.09 mg/g derived from the Langmuir model was much close to the experimental result. From the kinetic analysis, the pseudosecond-order model was found to be the suitable model to describe the adsorption behavior. The calculated adsorption capacities at difffferent temperatures derived from the pseudo-second-order model ranging from 68.91 to 69.8 mg/g were well close to the experimental data. The intraparticle diffffusion of MB molecules into pore structures of tea stem powder is the rate-limiting step for the adsorption process in this study. Evaluation of thermodynamic parameters including changes in enthalpy, entropy, and Gibb’s free energy indicated the adsorption mechanism between MB and tea stem powder was a spontaneous and exothermic process. The regeneration/adsorption experiments indicated that the tea stem powder effiffifficiently remained more than 97% after fifive cycles using NaOH as a desorbing agent and thus be used for many times. On the basis of experimental results obtained, it is concluded that the tea stem has a considerable potential as a low-cost sorbent for removing MB from the aqueous phase. |
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