不同活性碳種類對鋅離子吸附之研究

The Effects of Different Kinds of Activated Carbon of Zinc Ion

阮巽雯(Sun-Wen Juan) ； 夏滄琪(Tsang-Chyi Shiah) ； 黃金城(Jin-Cherng Huang) ； 王亞男(Ya-Nan Wang) ； 劉素玲(Su-Ling Liu)

《國立臺灣大學生物資源暨農學院實驗林研究報告》 31卷4期 (2017/12) Pp. 205-212

https://doi.org/10.6542/EFNTU.2017.31(4).2

摘要

以牛糞、刺竹及商用三種活性碳做為吸附劑，探討其吸附不同濃度溶液中之鋅離子能力，並分析其Langmuir與Freundlich等溫吸附模式。結果顯示，牛糞及刺竹活性碳在不同鋅離子濃度下吸附性皆優於商用活性碳者，其中牛糞活性碳的吸附能力最佳，碳材比表面積及孔隙分佈並與吸附效果並無明顯相關，但牛糞活性碳之灰分及磷含量較高，因此推測可能係牛糞活性碳的其他金屬離子與鋅離子發生離子交換，提高牛糞的吸附性。又分析3種活性碳對鋅離子的Langmuir與Freundlich等溫吸附模式，得知二種吸附模式的平衡參數皆顯示出有利於鋅離子吸附，再由決定係數R^2值得知，三種活性碳均較符合單層吸附行為之Langmuir等溫吸附模式。

關鍵字

活性碳 ； 鋅離子 ； 吸附能力 ； 等溫吸附模式

並列摘要

This study examined adsorption ability of zinc ion and isotherm data treated according to Langmuir and Freundlich models at different concentration solutions using cattle manure, thorny bamboo (Bambusa stenostachya) activated carbons, and commercial activated carbons as adsorbent. The results showed that adsorption ability of cattle manure and thorny activated carbons was than that of commercial activated carbon, and cattle manure activated carbon was the best. Specific surface area and pore structure of activated carbons were not significantly related to the adsorption effect. There is higher quantity of ash and phosphorus in cattle manure activated carbon, which cause ion exchange between zinc ion and other metal ions, and thus, raised the adsorption ability. According to Langmuir and Freundlich models analysis, the Langmuir adsorption isotherm model better represented single layer adsorption behavior of the three activated carbons for adsorbing zinc ion by coefficient of determination. All dimensionless equilibrium parameter data were beneficial to adsorption of zinc ion.

並列關鍵字

Activated carbon ； Zinc ion ； Adsorption ability ； Adsorption isotherm model