迷你管柱吸附之表面擴散模式

A Surface Diffusion Model for Adsorption in a Rapid Small Scale Column

顏有利(Yeou-Lih Yan) ； 王根樹(Gen-Shuh Wang) ； 吳敏成(Min-Cheng Wu) ； 涂瑞澤(Jui-Rze Too)

《大葉學報》 8卷2期 (1999/12) Pp. 135-144

https://doi.org/10.7119/JDYU.199912.0135

摘要

台灣地區的水源普遍遭受有機物污染，水中有機物的存在會影響淨水處理之加氯消毒程序。為確保飲水之品質，以活性碳吸附飲用水中之有機物為最常用的方法之一。本研究之目的是建立迷你管柱吸附模式來描述活性碳對飲用水中微量有機物的吸附，並探討活性碳用量、水樣流量、擴散係數等對吸附量的影響。研究方法為利用有限差分方法將微量有機物於活性碳迷你管柱中之質傳方程式，重新改寫為一階聯立微分方程式，然後以Runge-Kutta fourth-order method求解。再與實驗室中迷你管柱實驗之結果比較，校正模式之參數；推求最佳表面擴散係數、介面膜傳輸係數及等溫吸附曲線常數。模擬的貫穿曲線與實驗所得之貫穿曲線有相似的趨勢。

關鍵字

活性碳 ； 微量有機物 ； 吸附 ； 迷你管柱試驗 ； 表面擴散模式

並列摘要

Most of Taiwan's water resources are polluted by organic matter, which disrupts the chlorination process in water treatment. To assure the quality of drinking water, the adsorption by activated carbon is one of the most commonly used methods to remove organic matter. The purpose of this study was to develop a mini-column adsorption model for removal of trace organic matter in drinking water by activated carbon. The effects of dosage, flow rate and diffusion properties on adsorption capacity were explored. The finite difference method was introduced to rewrite the transport control equation into a system of first-order differential equations, which would then be solved by the Runge-Kutta fourth-order method. Simulation results are compared to those of rapid small-scale column tests (RSSCT). The best fitted values for column diffusion and surface diffusion coefficients, and isotherm adsorption constants were obtained by calibrating the model to experimental data. This model can be served as a guide to design experiments and to estimate pertinent parameters.

並列關鍵字

activated carbon ； trace organic matter ； adsorption ； rapid small scale column test (RSSCT) ； surface diffusion model