Residual dissolved aluminum (Al) in drinking water is becoming a serious concern due to its high potential risks to human health. However, the mechanism by which residual dissolved Al forms is yet to be elucidated in detail. In this study, the effects of pre-oxidation by ozonation and chlorination on the properties of dissolved organic matter (DOM) and residual Al concentrations remaining in solution after coagulation were explored in a pilot-scale test. Changes in the DOM properties caused by the water treatment process were characterized by ultraviolet-visible absorbance spectroscopy. Theprotonation-active sites, carboxylic- and phenolic-type groupsof DOM were quantified by spectral parameter DlnA400 (differential log-transformed spectra at wavelength 400 nm) in combination with the revised non-ideal competitive adsorption model. The results show that ozonation and chlorination significantly affect the properties of DOM and the amount of residual dissolved Al in coagulated drinking water. This effect was associated with the changes in the carboxylic- and phenolic-type groups in DOM. Results of the study show that residual dissolved Al in coagulated water can be controlled by affecting theAl binding sites in DOM by pre-oxidation before coagulation. The nature of pre-oxidation agent and its dosage should be selected depending on the quality of the raw water to be treated. Ozonation was concluded to be preferable pre-oxidation agent for the water in examined this study.

饮用水中残留的溶解铝（Al）由于其对人体健康的高潜在风险而成为一个严重问题。但是，尚未详细阐明残余的溶解的Al形成的机理。在这项研究中，通过中试测试探索了臭氧氧化和氯化预氧化对凝固后溶液中溶解的有机物（DOM）的特性和溶液中残留的残留Al浓度的影响。通过紫外可见吸收光谱法表征了由水处理过程引起的DOM特性的变化。DOM的质子活性位点，羧基和酚型基团是通过光谱参数DlnA400（波长为400 nm的对数转换光谱进行差分对数转换）与修正的非理想竞争吸附模型相结合进行定量的。结果表明，臭氧化和氯化作用显着影响DOM的特性以及凝结饮用水中残留的Al溶解量。这种作用与DOM中羧基和酚型基团的变化有关。研究结果表明，在凝固前通过预氧化作用影响DOM中的Al结合位点可以控制凝固水中残留的溶解Al。预氧化剂的性质及其用量应根据待处理原水的质量来选择。在本研究中，臭氧处理被认为是水的首选预氧化剂。这种作用与DOM中羧基和酚型基团的变化有关。研究结果表明，在凝固前通过预氧化作用影响DOM中的Al结合位点可以控制凝固水中残留的溶解Al。预氧化剂的性质及其用量应根据待处理原水的质量来选择。在本研究中，臭氧处理被认为是水的首选预氧化剂。这种作用与DOM中羧基和酚型基团的变化有关。研究结果表明，在凝固前通过预氧化作用影响DOM中的Al结合位点可以控制凝固水中残留的溶解Al。预氧化剂的性质及其用量应根据待处理原水的质量来选择。在本研究中，臭氧处理被认为是水的首选预氧化剂。