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首页> 外文期刊>Chinese science bulletin >Fate of secondary effluent dissolved organic matter during soil-aquifer treatment
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Fate of secondary effluent dissolved organic matter during soil-aquifer treatment

机译：含水层处理过程中次级污水溶解有机物的去向

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摘要

The reduction of mass and trihalomethane formation potential (THMFP) of dissolved organic matter (DOM) and its fractions from secondary effluent during laboratory-scale soil-aquifer treatment (SAT) soil columns were studied. Reduction in dissolved organic carbon (DOC), absorbance of ultraviolet light at 254 nm (UV-254), biodegradable dissolved organic carbon (BDOC) and nonbiodegradable dissolved organic carbon (NBDOC) for the bulk DOM averaged 72.35%, 53.98%, 97.49% and 35.33% across the soil columns, respectively. Using XAD-8 and XAD-4 resins, DOM was fractionated into 3 fractions: hydrophobia acid (HPO-A), transphilic acid (TPI-A) and hydrophilic fraction (HPI). HPO-A was removed by 61.06%, TPi-A by 54.86% and HPI by 74.95% as DOC as a consequenceof the laboratory-scale SAT, respectively. The reduction of THMFP from HPO-A, TPI-A and HPI was 27.24%, 26.24% and 36.08%, respectively. Proton nuclear magnetic resonance (1H-NMR) spectra revealed that the HPO-A isolated from the secondary effluent contained m re aromatic functional groups than the corresponding TPI-A. Fourier-transform infrared (FT-IR) spectrum analysis illustrated that TPI-A had decreased hydrocarbon and increased aromatics content in the SAT columns. Specific ultraviolet light absorbance (SUVA) and specific THMFP for each DOM fraction increased across the soil columns and HPI exhibited greater increase in both than HPO-A and TPI-A. The most problematic THM precursor was found to be HPO-A with its high quantity present in rechargedwater and high chlorine reactivity.
机译：研究了在实验室规模的土壤-含水层处理（SAT）土柱中，可溶性有机物（DOM）及其次级流出物的质量和三卤甲烷形成潜力（THMFP）的降低。减少DOM的溶解有机碳（DOC），254 nm紫外线吸收（UV-254），可生物降解的溶解有机碳（BDOC）和不可生物降解的溶解有机碳（NBDOC）的平均值分别减少了72.35％，53.98％，97.49％分别占土壤柱的35.33％。使用XAD-8和XAD-4树脂，将DOM分为3个馏分：疏水酸（HPO-A），反苯甲酸（TPI-A）和亲水性馏分（HPI）。由于实验室规模的SAT，将DOC的HPO-A去除了61.06％，TPi-A去除了54.86％，HPI去除了74.95％。从HPO-A，TPI-A和HPI降低THMFP分别为27.24％，26.24％和36.08％。质子核磁共振（1H-NMR）光谱显示，从次级流出物中分离出的HPO-A比相应的TPI-A含有m个芳香族官能团。傅立叶变换红外（FT-IR）光谱分析表明，TPI-A在SAT柱中的烃减少，芳烃含量增加。在整个土壤柱中，每个DOM组分的比紫外线吸收率（SUVA）和比THMFP均增加，而HPI的增加均大于HPO-A和TPI-A。发现最有问题的THM前体是HPO-A，其在补给水中的含量很高，并且氯反应活性高。

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