Study on release characteristics of ammonium in the surface sediments of Dianchi Lake

被引：0

作者：

Deng, Weiming ^{[1
]}

Xu, Xiaomei ^{[1
]}

Chen, Chunyu ^{[1
]}

He, Jia ^{[1
]}

Liu, Wenbin ^{[2
]}

Li, Sen ^{[1
]}

机构：

[1] Research Center of Lakes and Reservoirs, Kunming Institute of Environmental Sciences, Kunming

[2] Research Institute of Water Environment, Chinese Research Academy of Environmental Sciences, Beijing

来源：

Research of Environmental Sciences | 2015年 / 28卷 / 04期

关键词：

Ammonium nitrogen distribution characteristics; Ammonium nitrogen release dynamics; Dianchi Lake; Sediment;

D O I：

10.13198/j.issn.1001-6929.2015.04.06

中图分类号：

学科分类号：

摘要：

Surface sediment samples were collected in 2013 from 36 sites in Dianchi Lake to study the endogenous pollution. The distribution of NH4+-N content in the sediments and the release kinetics status of NH4+-N were researched. The results showed that the content of NH4+-N in the surface sediments was about 155.8-667.8 mg/kg, with average content of 333.7 mg/kg. The maximum content occurred in the center of the lake. Over the 0-5 minute time period, the release rate of NH4+-N was the fastest, being up to 3.34-42.31 mg/(kg·min). The release rate gradually decreased after 5 minutes and balanced after 120 minutes. The potential release ability of NH4+-N was about 17, 147-34, 163 mg/kg, which was related to the ratio between water and soil. In most regions of Dianchi Lake, the potential ability of release of NH4+-N was relatively high, especially in the north of Caohai and the Panlong River mouth. Either the release ratio or the potential release ability of NH4+-N in Dianchi Lake was higher than that in the lakes in the middle and lower streams of the Yangtze River. The release ratio in Dianchi Lake was similar to those in Erhai Lake, which is also located on a plateau; however, the potential release ability of NH4+-N in Dianchi Lake was much higher than that in Erhai Lake. Therefore, the release risk of NH4+-N in the surface sediments in the Dianchi Lake was extremely high. ©, 2015, Editorial department of Molecular Catalysis. All right reserved.

引用

页码：524 / 531

页数：7

共 32 条

[1]

Guideline for Water Reuse, (2004)

[2]

Ahlgren J., Tranvik L., Gogol A., Sediment depth attenuation of biogenic phosphorus compounds measured by NMR, Environmental Science & Technology, 39, 3, pp. 867-872, (2005)

[3]

House W.A., Denison F.H., Factors influencing the measurement of equilibrium phosphate concentration in river sediments, Water Research, 34, 4, pp. 1187-1200, (2000)

[4]

Zhou Q., Gibson C.E., Zhu Y., Evaluation of phosphorus bioavailability in sediments of three contrasting lakes in China and the UK, Chemosphere, 42, pp. 221-225, (2001)

[5]

Hu C., Pu P., Downward flux of suspended and organic decomposition rate in Wulihu Bay, Taihu Lake, Oceanologia et Limnologia Sinica, 31, 3, pp. 327-333, (2000)

[6]

Portielje R., Lijklema L., Estimation of sediment-water exchange of solutes in Lake Veluwe, the Netherlands, Water Research, 33, 1, pp. 279-285, (1999)

[7]

Li B., Ding S., Fan C., Et al., Estimation of releasing fluxes of sediment nitrogen and phosphorus in Fubao Bay in Dianchi Lake, Environmental Science, 29, 1, pp. 4-10, (2008)

[8]

Fang T., Liu J., Xiao B., Et al., Mobilization potential of heavy metals:a comparison between river and lake sediments, Water, Air and Soil Pollution, 161, 1-4, pp. 209-225, (2005)

[9]

Kuwabara J.S., Carter J.L., Topping B.R., Et al., Importance of sediment-water interactions in Coeur d'Alene Lake, Idaho USA:management implications, Environmental Management, 32, pp. 348-359, (2003)

[10]

Hecky R.E., Kilham P., Nutrient limitation of phytoplankton in freshwater and marine environments:a review of recent evidence on the effects of enrichment, Limnology and Oceanography, 33, pp. 797-822, (1988)

← 1 2 3 4 →