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Distribution of nitrogen and phosphorus and estimation of nutrient fluxes in the water and sediments of Liangzi Lake, China
Meng, Xin; Zhang, Wenqiang; Shan, Baoqing
2020-03-01
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Volume27Issue:7Pages:7096-7104
AbstractWater samples and sediments from Liangzi Lake were taken and used to study the vertical distribution characteristics of nitrogen (N) and phosphorus (P) in both the overlying and pore water. Fluxes of ammonia (NH4+-N) and phosphate (PO43--P) were calculated using a one-dimensional transport-reaction model based on Fick's First Law. The results showed that the mean NH4+-N and NO3--N concentrations in the overlying water of Liangzi Lake were 2.59 and 0.46 mg L-1, respectively. The mean PO43--P concentrations were lower than the detection limit. Both N and P displayed peaks at the sediment-water interface. For example, the mean concentration of ammonia in pore water in the surficial layer (0-5 cm) was 4.29 +/- 2.74 mg center dot L-1, which was twice than that of the overlying water. Two PO43--P vertical profile regimes were identified; one had a gradually increasing trend, while the other first increased and then decreased. The mean orthophosphate concentration in the pore water of the surface layer (0-5 cm) was 0.01 +/- 0.01 mg center dot L-1. The spatial distribution of ammonia flux values was highly heterogeneous. Using these data, the annual load contribution of autochthonous ammonia was calculated to be 481 t a(-1). Studying N and P pollution and fluxes in the lakes of urban drinking water sources facilitates the provision of protection measures.
Department环境水质学国家重点实验室
KeywordNutrients Flux Sediment-water interface Fick's law
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/42639
Collection环境水质学国家重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Meng, Xin,Zhang, Wenqiang,Shan, Baoqing. Distribution of nitrogen and phosphorus and estimation of nutrient fluxes in the water and sediments of Liangzi Lake, China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2020,27(7):7096-7104.
APA Meng, Xin,Zhang, Wenqiang,&Shan, Baoqing.(2020).Distribution of nitrogen and phosphorus and estimation of nutrient fluxes in the water and sediments of Liangzi Lake, China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,27(7),7096-7104.
MLA Meng, Xin,et al."Distribution of nitrogen and phosphorus and estimation of nutrient fluxes in the water and sediments of Liangzi Lake, China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 27.7(2020):7096-7104.
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