首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Removal of Disinfection By-Products from Contaminated Water Using a Synthetic Goethite Catalyst via Catalytic Ozonation and a Biofiltration System·
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Removal of Disinfection By-Products from Contaminated Water Using a Synthetic Goethite Catalyst via Catalytic Ozonation and a Biofiltration System·

机译:使用合成针铁矿催化剂通过催化臭氧化和生物过滤系统去除污水中的消毒副产物·

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摘要

The effects of synthetic goethite (α-FeOOH) used as the catalyst in catalytic ozonation for the degradation of disinfection by-product (DBP) precursors are investigated. A biofiltration column applied following the catalytic ozonation process is used to evaluate the efficiency of removing DBP precursors via biotreatment. Ozone can rapidly react with aromatic compounds and oxidize organic compounds, resulting in a decrease in the fluorescence intensity of dissolved organic matter (DOM). In addition, catalytic ozonation can break down large organic molecules, which causes a blue shift in the emission-excitation matrix spectra. Water treated with catalytic ozonation is composed of low-molecular structures, including soluble microbial products (SMPs) and other aromatic proteins (APs). The DOM in SMPs and APs is removed by subsequent biofiltration. Catalytic ozonation has a higher removal efficiency for dissolved organic carbon and higher ultraviolet absorbance at 254 nm compared to those of ozonation without a catalyst. The use of catalytic ozonation and subsequent biofiltration leads to a lower DBP formation potential during chlorination compared to that obtained using ozonation and catalytic ozonation alone. Regarding DBP species during chlorination, the bromine incorporation factor (BIF) of trihalomethanes and haloacetic acids increases with increasing catalyst dosage in catalytic ozonation. Moreover, the highest BIF is obtained for catalytic ozonation and subsequent biofiltration.
机译:研究了合成针铁矿(α-FeO​​OH)在催化臭氧氧化中对消毒副产物(DBP)前体降解的影响。在催化臭氧化过程之后使用的生物过滤柱用于评估通过生物处理去除DBP前体的效率。臭氧可以与芳族化合物快速反应并氧化有机化合物,从而导致溶解有机物(DOM)的荧光强度降低。另外,催化臭氧化可以分解大的有机分子,这会导致发射激发矩阵光谱发生蓝移。经催化臭氧处理的水由低分子结构组成,包括可溶性微生物产物(SMP)和其他芳香族蛋白质(AP)。 SMP和AP中的DOM通过随后的生物过滤去除。与没有催化剂的臭氧化相比,催化臭氧化对溶解的有机碳的去除效率更高,在254 nm处具有更高的紫外线吸收率。与仅使用臭氧化和催化臭氧化相比,使用催化臭氧化和随后的生物过滤可降低氯化过程中DBP的形成潜力。关于氯化过程中的DBP种类,三卤代甲烷和卤代乙酸的溴结合因子(BIF)随着催化臭氧化反应中催化剂用量的增加而增加。此外,获得最高的BIF用于催化臭氧化和随后的生物过滤。

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