Impact of DOM in Reclaimed Water on Nitrogen/Phosphate Adsorption in Sediments

Abstract:

The nitrogen and phosphate were regarded as the target pollutants in this paper to study the balance of adsorption / desorption to nitrogen and phosphate, the adsorption dynamic characteristics under the action of four kinds of urban rivers and lakes sediments in Beijing as well as the impact of DOM in reclaimed water to absorb nitrogen and phosphate. Results show that: the processes of sorption of nitrogen and phosphate in the four sediments could be described by the Linear and Freundlich models, while the adsorption-desorption goes with hysteresis effect. The adsorption of nitrogen and phosphate were inhibited by DOM in reclaimed water, with an adsorption coefficient K_d decreasing by 0.04% -56.88%, reaching a significant level (confidence level α = 0.05);And DOM increased the nonlinear parameter 1/n, up to 2.20 times at most, resulting in a lower adsorption stable.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 678-685
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.678
• Online since: September 2013
• Authors: Chun Fa Zhou, Zi Gong Ning, Wei Zhao, Yun Kai Li, Ming Chao Liang, Ze Shi, Pei Ling Yang, Zhi Yun Ouyang
• Keywords: Adsorption, Ammonium Nitrogen, Desorption, Dissolved Organic Matter, Phosphate, Sediment

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