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首页> 外文会议>International Conference on Manufacturing >Adsorption Mechanism of Humic Acid on Attapulgite based on Stumm-Schindle Surface Complexation Model
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Adsorption Mechanism of Humic Acid on Attapulgite based on Stumm-Schindle Surface Complexation Model

机译：基于Stumm-Schindle表面络合模型的植物酸对乙酸盐的吸附机理

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摘要

Attapulgite from Xuyi in Jiangsu was characterized by X-ray spectrometer and FT-IR spectrophotometer, the coordination reaction degree of attapulgite/water interface and adsorption mechanism of humic acid(HA) on attapulgite was analyzed by Stumm-Schindle(SS) surface complexation model. The results showed that the main component of attapulgite is magnesia-alumina acid salt, the surface charge on attapulgite adapted from hydrolysates of Si-O and Al-O broken bond. After adsorption, zeta potential decreased firstly and then increased with ionic strength increasing, reduced with a pH value increasing. The zero point charge (pHzpc) of attapulgite was about 4～5, zeta potential and adsorption capacity reached the maximum values when pH=4 and the minimum values when pH=12. The adsorption capacity increased with ionic strength rising. SS surface complexation model could well explain attapulgite/water interfacal coordination reaction, ionic strength can promote the interfacial coordination reaction and reduce electrostatic repulsion effects on adsorption, which has a definite theoretical and practical significance for guiding adsorption experiment and application of attapulgite in water-treatment technology.
机译：来自江苏徐义的山顶螺筋的特征在于X射线光谱仪和FT-IR分光光度计，通过Stump-Schindle（SS）表面络合模型分析了腐蚀剂/水界面的配位反应（HA）对肱骨酸（HA）的吸附机理。结果表明，甲己酸盐的主要成分是氧化镁酸盐，表面电荷对来自Si-O和Al-O破碎键的水解产物的乙烯酸盐。吸附后，Zeta电位首先降低，然后随离子强度的增加而增加，随着pH值的增加而降低。紫杉醇的零点电荷（PHZPC）约为4〜5，Zeta电位和吸附容量在pH = 4和pH = 12时的最小值时达到最大值。吸附容量随离子强度上升而增加。 SS表面络合模型可以很好地解释亚己酸酯/水界面配位反应，离子强度可促进界面配位反应，降低静电排斥对吸附的影响，这对于引导吸附试验和亚己酸盐胶质在水处理中的应用具有明确的理论和实践意义技术。

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