溶解性有机物在人工湿地处理系统中的三维荧光光谱分析  

Three-dimensional fluorescence of dissolved organic matter in eutrophic lake water with constructed wetland

作　　者：徐成斌[1] 孟雪莲[2] 马溪平[1] 姜磊[1] 李瑶瑶[1] 包坤[1] 

机构地区：[1]辽宁大学环境学院,辽宁沈阳110036 [2]辽宁大学药学院,辽宁沈阳110036

出　　处：《生态环境学报》2012年第12期1998-2001,共4页Ecology and Environmental Sciences

基　　金：辽宁省科学技术计划项目(2011230009);辽宁大学环境学院重点学科资助项目

摘　　要：采用三维荧光光谱技术，研究3个复合垂直流人工湿地（CVFW）处理农村富营养化水体后水中溶解有机物（DOM）的荧光特征变化，比较植物组合和基质对DOM的影响作用，并对该水体中的DOM来源进行分析。结果表明：①所有水样中均能表征出2种类富里酸和2种类蛋白溶解性有机物，三维荧光图谱中可以分辨出可见光类富里酸（记为M）、紫外类富里酸（记为A）、类色氨酸（记为S）3个荧光峰团，而类酪氨酸峰并不明显。②3个不同的CVFW组合处理水体中，类富里酸的荧光峰值降低率为：CVFW．1〉CVFW．2〉CVFW．3；类蛋白的荧光峰值降低率为：CVFW-2〉CVFW-1〉CVFW-3。基质与植物的不同都会对人工湿地的净化效果产生影响：碎石好于页岩陶粒；风车草与美人蕉组合好于灯心草与菖蒲组合。这是CVFW-1和CWFW-2处理效果好于CVFW-3的原因所在。③荧光指数矗50／500在1．674～1．796之间，r（S，M）值在0．734～O．834之间，r（A，M）值在1．396-1．465之间。通过对．厶50，500、r（s，M）和r（A，M）的分析，该水体中的溶解有机物结构相对简单，主要来源于水中浮游植物和微生物的生命活动及残体分解。Three-dimension excitation emission matrix fluorescence spectroscopy（3DEEM） was used to investigate changes of fluorescence characterization of dissolved organic matter （DOM） in eutrophic water by treatment with three different compound vertical flow wetlands（CVFW）. Comparing the effect of plant composition and substrate on DOM, and analyzing the sources of DOM in eutrophic water.The results showed： ① All the samples were analyzed in the study, two fulvic-like and two protein-like were characterized, and the fluorescence peak of visiblefulvic-like （marked M）, UV fulvic-like （marked A）, and tyrosine-like（marked S）were clear, the fluorescence peak of tryptophan-like was not clear. ② Decreasing rate of fluorescence spectrophotometric of fulvic-like from water samples by treatment of three different CVFWs： CVFW-I〉CVFW-2〉CVFW-3, Decreasing rate of fluorescence spectrophotometric of protein-like from water samples by treatment of three different CVFWs： CVFW-2〉CVFW-1 〉 CVFW-3. It appears the different substrate and plants would have a significant impact on the purifying effect of constructed wetlands Gravel better than shale; the combination of Cyperus alternifolius and Canna generalis, better than the combination Juncus effusus L. and Acorus calamus Linn. This is the reason the purifying effect of CVFW-1 and CVFW-2 were better than the purifying effect of CVFW-3. ③ The values off450/500 ranged from 1.674 to 1.796, r（S,M） ranged from 0.734 to 0.834, r（A,M） ranged from 1.396 to 1.465, By analysising these parameters of DOM, it is possible that dissolved organic matter in the water is relatively simple structure, its comes mainly from the life of phytoplankton and microbial activity or the residue decomposition.

关 键 词：溶解有机物 三维荧光表征 复合垂直流人工湿地 富营养化水体 

分 类 号：X703[环境科学与工程—环境工程]