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首页> 外文期刊>Desalination: The International Journal on the Science and Technology of Desalting and Water Purification >Interaction of ozone and organic matter in coagulation with inorganic polymer flocculant-PACl: Role of organic components
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Interaction of ozone and organic matter in coagulation with inorganic polymer flocculant-PACl: Role of organic components

机译：臭氧和有机物在与无机高分子絮凝剂-PACl混凝中的相互作用：有机成分的作用

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摘要

In this study, two model waters were used to evaluate the ozone effect on aquatic organic matter (AOM) removal by coagulation with inorganic polymer flocculant (IPF)-polyaluminum chloride (PACI). Flocs formation during coagulation processes were detected by using PDA (Photometric Dispersion Analyzer). Apparent molecular weight distribution (AMWD) and resin fractionation (RF) were also performed to characterize the change of AOM as a result of pre-ozonation. The experimental results show that the dosage of O3, characteristics and composition of AOM are the most important factors on the behavior of coagulation. Great differences have been found between the two model waters. Coagulation in model water 1 (MW1) (composed of humic acids) is impaired markedly by pre-ozonation, as more DOC (Dissolved Organic Carbon) is produced with increasing O3 dosage. Floc formation.as exhibited from decreasing of the slopes of FI (Flocculation Index), is retarded gradually during coagulation process. Although residual turbidity is reduced with 1.15 mg/L O3, removals of DOC and UV_(254) all decreased. As for model water 2 (MW2) (composed of salicylic acid), FI is retarded also, but turbidity and DOC removals of coagulation after pre-ozonation are improved to a certain extent Coagulation performance judged from removal of DOC is improved distinctly by pre-ozonation. Fractionation results show that molecular weight of organic matter (OM) of MW1 is converted from higher to lower; and OM becomes from more hydrophobic to more hydrophilic, which might be one of the mechanisms involved in the impairment of ozonation on coagulation effect OM in MW2 is oxidized and mineralized to a greater extent, thus its impairment on coagulation is released. Finally, according to water properties, some proposed applications were provided for application of ozone in water treatment process.
机译：在这项研究中，使用两种模型水来评估臭氧对无机高分子絮凝剂（IPF）-聚氯化铝（PACI）的凝结作用对去除水生有机物（AOM）的影响。通过使用PDA（光度分散分析仪）检测凝结过程中的絮凝物形成。还进行了表观分子量分布（AMWD）和树脂分馏（RF），以表征由于预臭氧化而引起的AOM的变化。实验结果表明，O3的用量，AOM的特性和组成是影响混凝行为的最重要因素。在两个模型水之间发现了很大的差异。预臭氧处理显着削弱了模型水1（MW1）（由腐殖酸组成）中的混凝作用，因为随着O3剂量的增加，将产生更多的DOC（溶解的有机碳）。从FI（絮凝指数）的斜率减小所表现出的絮凝形成在凝结过程中逐渐被阻止。尽管残留浊度随着1.15 mg / L O3的降低而降低，但DOC和UV_（254）的去除均降低了。至于模型水2（MW2）（由水杨酸组成），FI也受阻，但预臭氧化后混浊度和DOC去除凝结物有一定程度的改善，通过去除DOC判断的混凝性能明显改善。臭氧化。分馏结果表明，MW1的有机物（OM）分子量由高变低。 OM从疏水性变为亲水性，这可能是臭氧氧化对凝血作用的影响机制之一，MW2中OM被氧化和矿化的程度更大，从而释放了其对凝血的损害。最后，根据水的性质，为臭氧在水处理过程中的应用提供了一些建议的应用。

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