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Study on Sedimentation & Release Rules of Nitrogen & Phosphorusin in the Three Gorge

Author: FuChunPing
Tutor: ZhongChengHua
School: Chongqing University
Course: Environmental Engineering
Keywords: Total nitrogen Total phosphorus Conductivity Particle size Temperature pH
CLC: X52
Type: Master's thesis
Year: 2004
Downloads: 286
Quote: 1
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Abstract


In this paper, the Yangtze raw water ( legend reserve cross-section ) soak ( Jiang Yunyang double of the small River Bridge section ) sediments for nitrogen and phosphorus deposition and release test , soil and water ratio of 10:1 . The study found that through a series of tests , total nitrogen (TN), total phosphorus (TP) deposition and release of the same concentration of conductivity , temperature , pH , water bodies TN , TP . The higher the conductivity , TN release ; the higher the temperature , the increase in TN TP release ; pH is lower , the greater the release amount of TN , TN released gradually decreases with the increase of pH . pH of less than 10. 07 TP release is substantially no change in a pH of greater than 11 . The 05 TP released dramatic increase; soaking in TN concentration less than 11 . 96 mg / l , the sediments TN release release concentration decreases the concentration of 11 . 96mg/l-15. Within the range of 80mg / l , TN basically no release . Concentration greater than 15. 80mg / l, TN is deposited , and its maximum deposition amount is increased with increasing TN concentration . TP concentration of less than 0. 015m / l ( Yangtze raw water concentration of TP ) is released , the concentration is greater than 0 . 015mg / l TP deposition , the deposition amount with TP concentration increased, the amount of deposition and concentration has a linear relationship ; particle size in the range of 10 mesh -100 mesh , TN , TP deposition and release the same .

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control
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