内河DOM降解的三维荧光、紫外光谱研究——以白马河为例

被引：38

作者：

钱伟 ^{[1
]}

杨玉盛 ^{[1
]}

曾宏达 ^{[1
]}

汪伟 ^{[2
]}

黄辉 ^{[1
]}

李熙波 ^{[1
]}

机构：

[1] 福建师范大学地理科学学院

[2] 福建师范大学化学与材料学院

来源：

亚热带资源与环境学报 | 2007年 / 03期

关键词：

DOM; 生物降解; 荧光光谱; 紫外光谱;

D O I：

10.19687/j.cnki.1673-7105.2007.03.007

中图分类号：

X131.2 [水污染化学];

学科分类号：

083001 [环境科学];

摘要：

利用三维荧光光谱、紫外光谱手段,研究白马河水样中DOM在微生物作用下的分解情况,经过微生物分解204 h后DOC的浓度下降为23%.根据双指数方程拟合,水样中易分解组分占总量的63.2%,易分解组分与难分解组分的分解常数分别为0.102 h-1,0.002 57 h-1.随着培养时间的延长,水样三维荧光光谱中单位浓度有机物的荧光强度有不同程度的提高.根据水样的紫外吸收光谱分析,培养过程中SUVA254 nm有逐步升高的趋势,而溶液250 nm与365nm吸收的比值没有明显变化.

引用

页码：42 / 48

页数：7

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