CAJ | 학술논문

在南淝河15个排口采集了表层沉积物样品，在测定了其中溶解性有机碳(SDOC)含量的同时，采用紫外-可见吸收光谱和三维荧光光谱分析方法，并结合 PARAFAC 模型对沉积物中溶解性有机质(DOM)的荧光组分和来源进行了解析.结果表明：南淝河不同排口表层沉积物SDOC的含量在0.28~0.95g/kg之间，平均为0.63g/kg；老城区采样点沉积物SDOC明显高于其他河段，特别是靠近污水厂尾水排放口沉积物SDOC明显高于其他采样点.南淝河沉积物紫外-可见光吸收系数aλ可以很好表征沉积物DOM含量相对大小，而光谱斜率S275-295和光谱斜率比SR反映出各采样点沉积物DOM中自生源组分的差异；利用PARAFAC模型解析出DOM四种荧光组分，其中较老的自生源腐殖质C2和新近类蛋白C4所占比例高.南淝河不同排口沉积物DOM自生源组分比例存在显著差异，其中老城区排口沉积物DOM以自生源组分为主，而上游排口沉积物DOM陆源组分所占比例较高，雨污排口和污水厂尾水排口虽以自生源为主，但陆源的贡献不可忽略.结果表明，光谱分析方法能够有效表征城市河道不同排口污染源强.
재남비하15개배구채집료표층침적물양품，재측정료기중용해성유궤탄(SDOC)함량적동시，채용자외-가견흡수광보화삼유형광광보분석방법，병결합 PARAFAC 모형대침적물중용해성유궤질(DOM)적형광조분화래원진행료해석.결과표명：남비하불동배구표층침적물SDOC적함량재0.28~0.95g/kg지간，평균위0.63g/kg；로성구채양점침적물SDOC명현고우기타하단，특별시고근오수엄미수배방구침적물SDOC명현고우기타채양점.남비하침적물자외-가견광흡수계수aλ가이흔호표정침적물DOM함량상대대소，이광보사솔S275-295화광보사솔비SR반영출각채양점침적물DOM중자생원조분적차이；이용PARAFAC모형해석출DOM사충형광조분，기중교로적자생원부식질C2화신근류단백C4소점비례고.남비하불동배구침적물DOM자생원조분비례존재현저차이，기중로성구배구침적물DOM이자생원조분위주，이상유배구침적물DOM륙원조분소점비례교고，우오배구화오수엄미수배구수이자생원위주，단륙원적공헌불가홀략.결과표명，광보분석방법능구유효표정성시하도불동배구오염원강.
The surface sediments samples were collected from 15 discharge ports of Nanfei River, an urban river in Hefei, Anhui Province. The fluorescence components and the sources of dissolved organic matter (DOM) in sediments were analyzed by the uses of dissolved organic carbon (SDOC) measurement, ultraviolet-visible absorption spectrum, and three-dimensional excitation emission matrix fluorescence spectroscopy (3D-EEM) combined with parallel factor analysis (PARAFCT). The results showed that the contents of SDOC ranged from 0.28to 0.95g/kg with the average of 0.63g/kg. The contents of SDOC in the old town were observed significantly higher than others, especially for the discharging ports near sewage plant effluents. It was found that the UV-Visible absorption coefficient (aλ) reflected well the relative quantity of DOM extracted from the sediments. The spectral slop (S) and the spectral slope ratio (SR) could be used to distinguish the difference in chemical composition of sediment DOM from different discharging ports. Further 3D-EEM analysis and PARAFAC mode studies revealed that there were four fluorescence components, and the autochthonous fractions including C2and C4components were the main sources of sediment DOM. It seems that there existed significant difference in the sources of sediment DOM from different discharging ports, and the sediment DOM of discharging ports from old town mainly originated from autochthonous production, while DOM of the sediment samples from upstream of Nanfei River showed significantly higher terrestrial source than that of the other samples. This study indicates that the spectrum analysis can be a useful tool to characterize the pollution intensity and discharging sources into the urban river.