CAJ | 학술논문

利用紫外－可见吸收光谱（ UV-Vis）和荧光激发－发射矩阵光谱（ EEMs）技术研究了广州市番禺区大学城雨水中溶解有机质（ DOM）的吸收和荧光等光谱特性。结果表明：不同气候特征的雨水DOM的吸收光谱随波长增加呈指数衰减，UV-Vis光谱的斜率指数S的变化表明不同季节DOM 的相对分子量不同：夏季DOM平均相对分子量较高，而春季和冬季DOM相对分子量相对较低。雨水中DOM的EEMs光谱表明样品中存在3个类腐殖质峰：紫外类腐殖质峰A、海洋类腐殖质峰M和类蛋白（色氨酸）峰T，其中紫外类腐殖质峰A在雨水DOM中占主导作用。另外腐殖化指数（ HIX）表明冬季雨水样品的腐殖化程度较高。
이용자외－가견흡수광보（ UV-Vis）화형광격발－발사구진광보（ EEMs）기술연구료엄주시번우구대학성우수중용해유궤질（ DOM）적흡수화형광등광보특성。결과표명：불동기후특정적우수DOM적흡수광보수파장증가정지수쇠감，UV-Vis광보적사솔지수S적변화표명불동계절DOM 적상대분자량불동：하계DOM평균상대분자량교고，이춘계화동계DOM상대분자량상대교저。우수중DOM적EEMs광보표명양품중존재3개류부식질봉：자외류부식질봉A、해양류부식질봉M화류단백（색안산）봉T，기중자외류부식질봉A재우수DOM중점주도작용。령외부식화지수（ HIX）표명동계우수양품적부식화정도교고。
The dissolved organic matter ( DOM) in rainwater were collected from universities town of Guangzhou and were characterized with UV-Vis absorbance and three-dimensional excitation-emission matrix ( EEM) fluores-cence spectroscopies.The results shown that the UV-Vis absorbance spectra exhibited similar characteristics, which was exponential attenuation with the increasing wavelength.The spectral slope coefficient ( S ) of UV–visible spectra indicated relative higher molecular weight in summer than that in spring and winter.Three fluorophores were identified in the EEM fluorescence spectra of DOM:The UV humic-like peak A, the marine humic-like peak M and the protein-like peak ( tryptophan) T, and the humic-like peak A was the dominant component in the rain DOM in Guangzhou.Humification index ( HIX) suggested that the rain DOMs in winter were characterized with rel-atively high humification degree.