Ezperimental Simulation of Ozygen Consumption by Bottom Sediment in the Liao River Estuary
The low dissolved oxygen (DO) concentration in the Liao River estuaries is a very serious ecological problem. Problems can be caused by the release of oxygen consumption matter originating from the bottom sediment, which has a high concentration of organic matter. The major reason for DO decline and water body fetor is the release of organic matter in the sediment and the mineralization of oxygen consumption. The impact of the estuarine water DO on the nutrients in sediments was investigated by experimental simulations. The changes in environmental factors such as the nutrients in the water that overlies the sediment in the Liao River was analyzed, and was associated with the DO concentration in order to discover the reason for the formation of low-oxygen water in the estuaries. The experimental simulation results indicated that the DO concentration in the sediment overlaying water was lower than in the main water body, and the COD in the sediment overlaying water was higher than in the main water body. The results prove that the sediment is a vital factor that affects the DO concentration in the sediment overlaying water. Correlative analysis indicates that nutrients showed better correlativity with the DO in the main water body than in the sediment overlaying water. Because the gross of the nutrients in the overlaying water varies greatly due to the nutrients released from the sediment, analysis of the correlativity is impossible. The organic matter in the overlaying water has a great effect on the DO content in the main water body.
Liao River estuary sediment main water body dissolved ozygen nutrient
TURSON Hairet Ding Wenming Tong Li Wang Jilong Zheng Binghui
College of Chemical Engineering Beijing University of Chemical Technology Beijing 100029, China Chinese Research Academy of Environmental Sciences Beijing 100012, China
国际会议
上海
英文
3691-3694
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）