δ15N在贵阳地下水氮污染来源和转化过程中的辨识应用
Using δ 15N to assess groundwater nitrogen pollution in Guiyang
查看参考文献19篇
|
文摘
|
随着城市的发展,贵阳地下水氮污染日趋严重,为评估地下水中氮的分布、来源和迁移转化,我们采集了 72个水样,并测定了三氮 (、和 )浓度、主离子、δ 15N- 和 δ 15N-等.结果显示,在贵阳地下水大多数样品中,- N是最主要的无机氮形态,城区地下水大部分含较高的- N; 然而在城市污水和有些被明显污染的地下水中,却是最主要的无机氮形态,尤其是枯水期.丰水期地下水样有较低的δ 15N值,受农业化肥等影响明显.丰水期地下水- N浓度随着 Cl-浓度升高而升高,表明丰水期地下水硝酸盐可能主要受混合作用等控制.而枯水期地下水中溶解氧与硝酸盐的δ 15N值呈负相关关系,且相对于丰水期地下水具有较高的δ 15N值、较低的硝酸盐浓度和较低的 DIN/Cl值,说明地下水环境中主要受土壤有机氮等影响 , 同时可能存在反硝化. |
|
其他语种文摘
|
Nitrogen pollution of groundwater is an increasing serious problem with the development of Guiyang, the capital city of Guizhou Province, China. In order to assess the distribution, source and transportation of nitrogen in groundwater system, groundwater and surface water samples were collected during two different seasons and analyzed for nitrate, ammonium, nitrite, major ions and dissolved organic carbon, δ~(15)N- NO_3~- andδ~(15)N N-NH_4~+. The results show that nitrate is the dominant species of nitrogen in most water samples. But high concentrations of ammonium are detected in sewage effluent and contaminated water samples, especially in winter. The mean values ofδ~(15)N N- NO_3~- in groundwater are + 7. ‰ in low-flow season and + 4. 1‰ in high-flow season, higher than those ofδ~(15)N- NO_3~- in surface water andδ~(15)N- NH_4~+ in water samples. The low values ofδ~(15)N in summer indicate that mixing might control nitrate in groundwater. At the same time, lower NO_3~- concentration, higher values ofδ~(15)N and lower values of DIN/Cl in winter than in summer suggest that denitrification probably occur in groundwater systems. |
|
来源
|
地球化学
,2005,34(3):257-262 【核心库】
|
|
关键词
|
δ 15N
;
地下水
;
反硝化
;
氮污染
;
贵阳市
|
|
地址
|
中国科学院,地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0379-1726 |
|
学科
|
地质学 |
|
基金
|
中国科学院知识创新工程重要方向项目
;
国家自然科学基金
|
|
文献收藏号
|
CSCD:1967596
|
参考文献 共
19
共1页
|
|
1.
Korom S F. A review [J].
Water Resour Res,1992,28(6):1657-1668
|
CSCD被引
33
次
|
|
|
|
|
2.
Kendall C. Isotope Tracers in Catchment Hydrology [M].
Isotope Tracers in Catchment Hydrology,1998:519-576
|
CSCD被引
87
次
|
|
|
|
|
3.
周爱国. 水环境硝酸盐氮污染研究新方法－^15N和^18O相关法.
地球科学,2003,28(2):219-224
|
CSCD被引
22
次
|
|
|
|
|
4.
韩至钧. 贵州省水文地质志 [M].
贵州省水文地质志,1996:1-42
|
CSCD被引
7
次
|
|
|
|
|
5.
曹卫锋. 贵阳市 2000- 2030年地下水资源及环境地质问题预测分析 [J].
贵州地质,1998,15(4):368-376
|
CSCD被引
4
次
|
|
|
|
|
6.
Heaton T H E. A review [J].
Chem Geol,1986,59(1):87-102
|
CSCD被引
127
次
|
|
|
|
|
7.
Wassenaar L I. Evaluation of the origin and fate of nitrate in the Abbotsford Aquifer using the isotopes of 15N and 18O in [J].
Appl Geochem,1995,10(4):391-405
|
CSCD被引
47
次
|
|
|
|
|
8.
Feast N A. Nitrogen isotope hydrochemistry and denitrification within the Chalk aquifer system of North Norfolk.
J Hydrol,1998,211(1/4):233-252
|
CSCD被引
10
次
|
|
|
|
|
9.
Silva S R. Forensic applications of nitrogen and oxygen isotopes in tracing nitrate sources in urban environments [J].
Environ Forensics,2002,3(2):125-130
|
CSCD被引
23
次
|
|
|
|
|
10.
Xing Guangxi. N pollution sources and denitrification in waterbodies in Taihu Lake region [J].
Science in China. Series B, Chemistry. (in English),2001,44(3):304-314
|
CSCD被引
52
次
|
|
|
|
|
11.
Xiao H Y. Sources of nitrogen and sulfur in wet deposition at Guiyang.
Atmos Environ,2002,36(33):5121-5130
|
CSCD被引
57
次
|
|
|
|
|
12.
张翠云. 利用氮同位素技术识别石家庄地下水硝酸盐污染源.
地球科学进展,2004,19(2):183-191
|
CSCD被引
45
次
|
|
|
|
|
13.
Garten C T Jr. Nitrogen isotope composition of ammonium and nitrate in bulk precipitation and forest throughfall [J].
Int J Environ Anal Chem,1992,47:33-45
|
CSCD被引
1
次
|
|
|
|
|
14.
Silva S R. A new method for collection of nitrate from fresh water and the analysis of nitrogen and oxygen isotope ratios [J].
J Hydrol,2000,228(1/2):22-36
|
CSCD被引
82
次
|
|
|
|
|
15.
Kendall C. Combustion tube method for measurement of nitrogen isotope ratios using calcium oxide for total removal of carbon dioxide and water [J].
Anal Chem,1990,62(5):526-529
|
CSCD被引
16
次
|
|
|
|
|
16.
Kellman L. Using natural abundances of -δ 15N to measure in- situ denitrification [J].
Biogeochemistry,1998,43(3):273-292
|
CSCD被引
8
次
|
|
|
|
|
17.
Mengis M. Multiple geochemical and isotopic approaches for assessing ground water elimination in a riparian zone[J].
Ground Water,1999,37(3):448-459
|
CSCD被引
36
次
|
|
|
|
|
18.
B(o)ettcher J. Using isotope fractionation of nitrate- nitrogen and nitrate- oxygen for evaluation of microbial denitrification in a sandy aquifer [J].
J Hydrol,1990,114(3/4):413-424
|
CSCD被引
1
次
|
|
|
|
|
19.
Bengtsson G. Heterotrophic denitrification potential as an adaptive response in groundwater bacteria [J].
FEMS Microbiol Ecol,1995,16(4):307-318
|
CSCD被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问