Ammonia adsorption and nitritation in sediments derived from the Three Gorges Reservoir, China

文献类型： 外文期刊

第一作者： Wang, Hongyuan

作者： Wang, Hongyuan;Shen, Zhenyao;Guo, Xuejun;Niu, Junfeng;Wang, Hongyuan;Kang, Bin

作者机构：

关键词： Ammonia adsorption;Ammonia-oxidizing bacteria;Nitritation;Nitrosomonas nitrosa;Suspended particles;Three Gorges Reservoir

期刊名称：ENVIRONMENTAL EARTH SCIENCES （ 影响因子：2.784； 五年影响因子：2.867 ）

ISSN： 1866-6280

年卷期： 2010 年 60 卷 8 期

页码：

收录情况： SCI

摘要： The influences of suspended particles (SPs) on NH(4) (+) adsorption and nitritation occurring in the water system of the Three Gorges Reservoir (TGR) were evaluated in this study. The results indicated that the adsorption of NH(4) (+) was significantly affected by the SPs concentration under the conditions typically present in the TGR. The amount of ammonia adsorbed per unit weight of suspended particles was inverse proportional to the concentration of suspended particles. However, the influences of the particle size and the organic matter concentration existing in SPs were insignificant under the experimental conditions. The effects of suspended particles on nitritation were determined by the use of ammonia-oxidizing bacteria (AOB) strain SW16, identified as Nitrosomonas nitrosa, which was isolated from sediment samples of the TGR. Suspended particle concentration in water-sediment solution played an important role in the nitritation process. The rate of nitritation enhanced with the increase of the suspended particle concentration. It was found that the critical factor controlling ammonia oxidizing rate was the AOB biomass resulting from the AOB growth rate. Moreover, results demonstrated that both particle size and organic matter content showed little effect on the nitritation process under the experimental conditions.

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