Characterization of Dissolved Organic Matter and Genotoxicity in the Aniline Industrial Wastewater

摘要

With resin absorption chromatography technique,dissolved organic matter (DOM) of the wastewater from an aniline treatment plant was fractionated into six fractions:hydrophobic acids (HOA),hydrophobic bases (HOB),hydrophobic neutrals (HON),hydrophilic acids (HIA),hydrophilic bases (HIB),hydrophilic neutrals (HIN).The dissolved organic carbon (DOC),ultraviolet-visible (UV) absorbance and genotoxicity of the wastewater and fractions were determined.The DOC values of hydrophobic acids and hydrophobic bases show the main fractions of DOM,comprising 29.4％ and 26％ respectively.UV spectroscopy and the specific UV absorbance (SUVA) value indicated HOA contained the most aromatic compounds.The wastewater exhibited genotoxicity of 46.7 μg-4NQO·L-1,HOA and HOB made the main contributions to the genotoxicity of the total sample,comprising 44％ and 31％ respectively.