Atrazine has been widely used as a synthetic herbicide in many countries. Due to its persistence and mobility, atrazine is difficult to eliminate by conventional treatment processes or biodegradation and may cause varying degrees of harm to untargeted organisms and threaten environmental sustainability. In recent years, microbubble ozonation has been reported to accelerate the removal of persistent organic pollutants, but there has been little research on the removal of atrazine using this approach. In this study, microbubble ozonation was shown to enhance the degradation of atrazine under a variety of pH conditions compared to macrobubble ozonation using the same concentration of aqueous ozone. The microbubble surface is usually negatively charged and hydroxyl ions accumulating at the gas–liquid interface can promote the self-decomposition of ozone and the formation of hydroxyl radicals. This promotion of ozone decomposition by microbubbles, together with the effect of microbubble collapse, were the major reasons for the enhanced degradation of atrazine. Common background components in water include organic humic acids, metal ions and inorganic ions. When low concentrations of humic acid or ferrous iron at concentrations similar to residual levels from coagulation processes were added into a pure water system, they exerted a positive effect on removal of atrazine, while the presence of bicarbonate in natural water may inhibit the degradation of atrazine in water treatment plants.

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微气泡臭氧化促进阿特拉津的降解

阿特拉津在许多国家被广泛用作合成除草剂。由于其持久性和流动性，at去津很难通过常规处理工艺或生物降解消除，并且可能对未靶向生物造成不同程度的伤害并威胁环境可持续性。近年来，已经报道了微泡臭氧化可促进持久性有机污染物的去除，但是关于使用这种方法去除at去津的研究很少。在这项研究中，与使用相同浓度的臭氧水溶液进行的大气泡臭氧氧化相比，在各种pH条件下，微气泡臭氧氧化可增强阿特拉津的降解。微气泡表面通常带负电荷，并且在气液界面上积累的氢氧根离子可促进臭氧的自分解和氢氧根的形成。微气泡对臭氧分解的促进作用以及微气泡崩溃的影响，是阿特拉津降解增强的主要原因。水中常见的背景成分包括有机腐殖酸，金属离子和无机离子。当将低浓度的腐殖酸或亚铁以与混凝过程中残留水平相似的浓度添加到纯水系统中时，它们对removal去津的去除具有积极作用，而天然水中存在的碳酸氢盐可能会抑制at去津的降解。在水处理厂。微气泡对臭氧分解的促进作用以及微气泡崩溃的影响，是阿特拉津降解增强的主要原因。水中常见的背景成分包括有机腐殖酸，金属离子和无机离子。当将低浓度的腐殖酸或亚铁以与混凝过程中残留水平相似的浓度添加到纯水系统中时，它们对removal去津的去除具有积极作用，而天然水中存在的碳酸氢盐可能会抑制at去津的降解。在水处理厂。微气泡对臭氧分解的促进作用以及微气泡崩溃的影响，是阿特拉津降解增强的主要原因。水中常见的背景成分包括有机腐殖酸，金属离子和无机离子。当将低浓度的腐殖酸或亚铁以与混凝过程中残留水平相似的浓度添加到纯水系统中时，它们对removal去津的去除具有积极作用，而天然水中存在的碳酸氢盐可能会抑制at去津的降解。在水处理厂。