北京师范大学学报(自然科学版)
北京師範大學學報(自然科學版)
북경사범대학학보(자연과학판)
JOURNAL OF BEIJING NORMAL UNIVERSITY
2014年
5期
508-514
,共7页
马梦娇%张淑荣%丁爱中%贾彤辉
馬夢嬌%張淑榮%丁愛中%賈彤輝
마몽교%장숙영%정애중%가동휘
溶解有机物%荧光特征%三维荧光光谱%洪水过程%沣河
溶解有機物%熒光特徵%三維熒光光譜%洪水過程%灃河
용해유궤물%형광특정%삼유형광광보%홍수과정%풍하
dissolved organic matter (DOM)%fluorescence characteristics%three-dimensional excitation emission matrix fluorescence spectroscopy (3DEEM)%storm flows%Fenghe River
利用三维荧光光谱技术对陕西西安境内的沣河秦渡镇水文站和高桥水文站的暴雨期间洪水过程的溶解有机物进行研究,讨论了荧光溶解有机物的来源、组成、分子结构等特征。结果表明强降水带来了更多荧光溶解有机物,表现为冲刷效应,洪水过程河流溶解有机物的荧光峰主要以代表陆源有机物的类富里酸荧光为主,类蛋白荧光较弱或没有检测出,表明人为污染影响较小。结构特征为腐化程度高、芳香性大,以大分子的有机物为主。春季首次强降水冲刷的有机物结构成分较为复杂,点源污染稀释作用和水库泄洪作用对洪水过程有机物的浓度、组成、结构等变化特征也有很大影响。
利用三維熒光光譜技術對陝西西安境內的灃河秦渡鎮水文站和高橋水文站的暴雨期間洪水過程的溶解有機物進行研究,討論瞭熒光溶解有機物的來源、組成、分子結構等特徵。結果錶明彊降水帶來瞭更多熒光溶解有機物,錶現為遲刷效應,洪水過程河流溶解有機物的熒光峰主要以代錶陸源有機物的類富裏痠熒光為主,類蛋白熒光較弱或沒有檢測齣,錶明人為汙染影響較小。結構特徵為腐化程度高、芳香性大,以大分子的有機物為主。春季首次彊降水遲刷的有機物結構成分較為複雜,點源汙染稀釋作用和水庫洩洪作用對洪水過程有機物的濃度、組成、結構等變化特徵也有很大影響。
이용삼유형광광보기술대협서서안경내적풍하진도진수문참화고교수문참적폭우기간홍수과정적용해유궤물진행연구,토론료형광용해유궤물적래원、조성、분자결구등특정。결과표명강강수대래료경다형광용해유궤물,표현위충쇄효응,홍수과정하류용해유궤물적형광봉주요이대표륙원유궤물적류부리산형광위주,류단백형광교약혹몰유검측출,표명인위오염영향교소。결구특정위부화정도고、방향성대,이대분자적유궤물위주。춘계수차강강수충쇄적유궤물결구성분교위복잡,점원오염희석작용화수고설홍작용대홍수과정유궤물적농도、조성、결구등변화특정야유흔대영향。
Three-dimensional excitation emission matrix fluorescence spectroscopy (3DEEM)was used to characterize fluorescence properties of dissolved organic matter during storm flows at Qinduzhen Hydrological Station and Gaoqiao Hydrological Station in the Fenghe River of Xi’an,Shaanxi Province.Storm flows brought more fluorescence of dissolved organic matter,possibly due to a flushing effect.Fluorescence in storm flows was dominantly fulvic-like representing terrestrial inputs, but protein-like fluorescence was weak or not detected,suggesting weaker influence from pollution. Dissolved organic matter showed high degree of corruption,aromaticity and organic macromolecules.Dissolved organic matter was structured more complex due to a spring first flush effect.Dilution of point source pollution and releasing flood waters from upstream reservoirs also had considerable impact on concentration,composition and structure of dissolved organic matter in storm flows.