Modelling of the Competitive Adsorption Between Micropollutants and Background Organics.

微污染物和背景有机物之间竞争吸附的建模。

• 批准号: 63550394
• 负责人: YUASA Akira
• 金额: $ 1.09万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550394/
• 关键词: Multicomponent Adsorption; Competitive Adsorption Model; Micropollutants; Background Organics; IAS theory; Adsorption Isotherm; 競合吸着; 多成分吸着; 微量有機物; pーニトロフェノ-ル; し尿処理水; 水中微量有機物; シミュレーション; 簡易モデル; フミン酸; 活性炭吸着; 吸着; 吸着平衡

IAS (Ideal Adsorbed Solution) theory was applied to a multi-component competitive adsorption on activated carbon. Numerical simulations were executed to the imaginary raw water containing solutes, the adsorption isotherm of which in their single-solute system is given by Freundlich equation. The result showed the essential difference between the adsorption isotherm of the total organics obtained by column tests and that obtained by batch tests. The simulations also showed that the batch adsorption isotherm changes when the raw water is diluted or concentrated. A predictive model was developed to describe the influence of dilution or concentration of raw water on the batch adsorption isotherm of the total organics. This model was successfully applied to the experimental batch adsorption isotherm of humic acid which is very typical background-organics in natural water, even though the concentration of humic acid was measured by surrogate parameters such as TOC and UV-adsorbance.Numerical simulations based on IAS theory also showed that the spreading pressure which specifies the adsorbed-phase can be correlated with the amount of the total organics adsorbed, and this correlation does not change when the raw water is diluted or concentrated and when the concentration of a certain component sligtly changes. Accordingly, the distribution ratio of a component between adsorbed-phase (activated carbon) and liquid-phase can be correlated with the amount of the total organics adsorbed. Based on the latter correlation, a simple but very practical model was developed to describe the competitive influence of background organics upon the adsorption of micropollutants onto activated carbon. This model was veryfied through the batch adsorption tests of paminobenzoic acid spiked into a river water which contains a moderate concentration of background organics.

将理想吸附溶液(IAS)理论应用于多组分竞争吸附。对含有溶质的假想原水进行了数值模拟，用Freundlich方程给出了其在单溶质体系中的吸附等温线。结果表明，柱法和间歇法测得的总有机物吸附等温线存在本质差异。模拟还表明，当原水被稀释或浓缩时，间歇吸附等温线会发生变化。建立了原水稀释度或浓度对总有机物间歇吸附等温线影响的预测模型。该模型成功地应用于天然水中典型的背景有机物--腐植酸的间歇吸附等温线，即使腐植酸的浓度是通过TOC和UV-吸附等替代参数来测量的。基于IAS理论的数值模拟也表明，指定吸附相的扩散压力可以与吸附的总有机物的量相关联，并且当原水被稀释或浓缩时，这种关联不会改变，当某一组分的浓度发生微小的变化时，这种关联不会改变。因此，组分在吸附相(活性碳)和液相之间的分配比例可以与被吸附的总有机物的量相关联。基于后一种关联式，建立了一个简单而实用的模型来描述背景有机物对微污染物在活性碳上吸附的竞争影响。通过向含有中等浓度背景有机物的河水中添加对氨基苯甲酸的批量吸附试验，验证了该模型的有效性。

项目成果

A. YUASA: "Influence of the Concentration Change of Raw Water upon the Carbon Adsorption Isotherms of Total Organics and Micropollutants." 1-st Macau Workshop on Water Treatment. 29-40 (1989)

A. YUASA：“原水浓度变化对总有机物和微污染物的碳吸附等温线的影响”。

A. YUASA: "A Simplified Model of Competitive Adsorption of Micropollutants and Background Organics in Water." Research Report of the Faculty of Engineering Gifu University. No. 39. 17-24 (1990)

A. YUASA：“水中微污染物和背景有机物竞争吸附的简化模型。”

Akira YUASA: "Influence of the Concentration Change of Raw Water upon the Carbon Adsorptionlsotherms of Total Organics and Micropollutants." 1ーst Macau Workship on Water Treatment. 29-40 (1989)

Akira YUASA：“原水浓度变化对总有机物和微污染物碳吸附等温线的影响”，第一届澳门水处理研讨会29-40 (1989)。

湯浅 晶: "水中の特定微量有機成分とバックグラウンド有機物の競合吸着平衡の簡易モデル" 岐阜大学工学部研究報告. 40. 17-24 (1990)

Akira Yuasa：“水中特定微量有机成分和背景有机物之间竞争吸附平衡的简单模型”岐阜大学工学部研究报告40. 17-24 (1990)。