ABSTRACT Catalytic ozonation of organic dyestuffs such as Methylene-Blue (MB) and Malachite Green (MG) was investigated in the presence of montmorillonite K10 and its Al-Fe modified counterpart (AF-K10). Adsorption was found to play akey-role involving specific acid-base, electrostatic, and/or hydrophilic/organophilic interactions according to the dye molecule and catalyst surface properties. MG turned out to be more reactive toward ozone alone but showed lower reactivity for ozone than MB in the presence of catalyst. The higher degradation yields of MG obtained after only 40 s ozonation using 0.0166 g O3 and AF-K10 can be explained by apossible clay-ozone synergy involving adsorption via both hydrophobic and additional acid–base interactions.

中文翻译：

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化学改性蒙脱石 K10 催化有机染料臭氧化——表面碱度和亲水性的作用

摘要 在蒙脱石 K10 及其 Al-Fe 改性对应物 (AF-K10) 存在下研究了有机染料如亚甲蓝 (MB) 和孔雀石绿 (MG) 的催化臭氧化。根据染料分子和催化剂表面性质，吸附被发现在涉及特定酸碱、静电和/或亲水/亲有机相互作用的过程中起着关键作用。结果证明 MG 单独对臭氧更具反应性，但在催化剂存在下对臭氧的反应性低于 MB。使用 0.0166 g O3 和 AF-K10 仅 40 秒臭氧化后获得的 MG 更高的降解率可以通过可能的粘土-臭氧协同作用来解释，包括通过疏水性和额外的酸碱相互作用进行吸附。