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中文摘要：
本研究利用XAD-8大孔树脂对某城市污水处理厂的厌氧-缺氧-好氧（A2O）工艺出水中的溶解性有机物进行了组分分离,分析了各组分的溶解性有机碳（Dissolved organic carbon,DOC）、紫外-可见光谱和遗传毒性.结果表明,污水中亲水性物质和疏水酸性物质的DOC含量分别占总DOC含量的65%和24%.亲水性物质组分中的芳香族化合物含量显著高于其它组分,但是单位质量的亲水性物质、疏水酸性物质和疏水碱性物质中的芳香族化合物含量相近.污水具有一定的遗传毒性,主要遗传毒性物质为亲水性物质和疏水酸性物质,而疏水碱性物质和疏水中性物质则未检出遗传毒性.
英文摘要：
Dissolved organic matter（DOM）in the effluent of an anaerobic-anoxic-aerobic（A2O）process of a municipal wastewater treatment plant was fractionated into four different fractions using adsorption resins.Thereafter,the dissolved organic carbon（DOC）,ultraviolet-visible（UV）spectroscopy and genotoxicity of each fraction were determined.The DOC values of the hydrophilic substrates（HIS）and the hydrophobic acids（HOA）showed these were the main fractions of DOM,comprising 65% and 24% of the total sample.UV spectroscopy indicated that HIS contained the most aromatic compounds among the DOM fractions.However,the specific UV absorbance（SUVA）value of HIS was similar to those of HOA and hydrophobic bases（HOB）,suggesting that the aromatic chemicals divided by the DOC concentration in the fractions were at a similar level.The wastewater exhibited genotoxicity and HIS and HOA made the main contributions to the genotoxicity of the total sample.
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