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2016年 第10卷 第6期

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《环境科学与工程前沿（英文）》 >> 2016年 第10卷 第6期 doi: 10.1007/s11783-016-0886-2

Red soil for sediment capping to control the internal nutrient release under flow conditions

. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China. .. Sichuan Provincial Environmental Protection Key Laboratory of Groundwater Pollution Prevention and Resource Security, Chengdu University of Technology, Chengdu 610059, China

发布日期： 2016-11-14
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The inhibition of sediment nitrogen (N) and phosphorus (P) release seems necessary. Red soil (RS) was firstly used as sediment capping material under flow conditions. RS capping can effectively reduce the N and P release from sediment. Nitrogen (N) and phosphorus (P) released from the sediment to the surface water is a major source of water quality impairment. Therefore, inhibiting sediment nutrient release seems necessary. In this study, red soil (RS) was employed to control the nutrients released from a black-odorous river sediment under flow conditions. The N and P that were released were effectively controlled by RS capping. Continuous-flow incubations showed that the reduction efficiencies of total N (TN), ammonium (NH -N), total P (TP) and soluble reactive P (SRP) of the overlying water by RS capping were 77%, 63%, 77% and 92%, respectively, and nitrification and denitrification occurred concurrently in the RS system. An increase in the water velocity coincided with a decrease in the nutrient release rate as a result of intensive water aeration.

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