CAJ | 학술논문

在"引江济太"水系的调查基础上,分析了有色溶解有机质(CDOM)的吸收光谱、荧光特性及其主要来源,探讨了CDOM与pH、DO、叶绿素α等水质指标的关系.结果表明:水体吸收系数α(355)与CDOM浓度呈显著正相关,均具有明显的空间差异,它们在河道出入湖口及开阔湖区较低,而在望虞河和太浦河中游较高,这显然与中游河道受纳了两岸污水有关,S值也表明望虞河受外源输入影响最大.通过三维荧光激发-发射矩阵(EEM)分析,发现了5种荧光团,包括2种类蛋白荧光团和3种类腐殖质荧光团,其中类蛋白荧光(特别是T峰)明显强于类腐殖质荧光.研究发现,水体DO浓度、pH值均随CDOM浓度呈指数函数递减.荧光指数(FI)明显偏向生物来源(约1.9),因此,"引江济太"水系CDOM以生物的本地生产为主,河道局部污染水体中的类腐殖质荧光可能来源于污水微生物对藻类产生的溶解有机质的转化,在局部河道中也有一定的外源输入.
재"인강제태"수계적조사기출상,분석료유색용해유궤질(CDOM)적흡수광보、형광특성급기주요래원,탐토료CDOM여pH、DO、협록소α등수질지표적관계.결과표명:수체흡수계수α(355)여CDOM농도정현저정상관,균구유명현적공간차이,타문재하도출입호구급개활호구교저,이재망우하화태포하중유교고,저현연여중유하도수납료량안오수유관,S치야표명망우하수외원수입영향최대.통과삼유형광격발-발사구진(EEM)분석,발현료5충형광단,포괄2충류단백형광단화3충류부식질형광단,기중류단백형광(특별시T봉)명현강우류부식질형광.연구발현,수체DO농도、pH치균수CDOM농도정지수함수체감.형광지수(FI)명현편향생물래원(약1.9),인차,"인강제태"수계CDOM이생물적본지생산위주,하도국부오염수체중적류부식질형광가능래원우오수미생물대조류산생적용해유궤질적전화,재국부하도중야유일정적외원수입.
Based on the investigation of the water body of the drainage system of Water Diversion from Yangtze River to Lake Taihu,the absorbance spectrum and fluorescent characteristics of chromophoric dissolved organic matter(CDOM)and its source were analyzed.The correlation between CDOM and some water quality indexes including pH,DO and chlorophyll-a concentrations was discussed.The results showed that CDOM concentrations were positively correlated with their absorption coefficients at 355nm with significantly spatial differences.S values also indicated that Wangyu River was affected by terrestrical input much more than other areas.Five fluorophores were observed by three dimensional excitation emission matrix(3DEEM)fluorescence spectroscopy including UVC protein-like,UVB protein-like,UVA humic-like,UVB humic-like,and UVC humic-like fluorescent signals.The fluorescence intensities of protein-like fractions(especially peak T)were much stronger than those of humic-like fractions.Both pH and DO concentrations exponentially decreased with CDOM concentrations.According to the correlation between chlorophyll-a concentrations and CDOM concentrations,humic-like fluorescent signal might transfromed by microorganisms.Fluorescence index had a value of about 1.9,therefore,CDOM could be dominated mainly by local microbial sources,and terrestrial input could be also a source of CDOM for part of the rivers.