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Ammonia-nitrogen Adsorption in Liaohe River Sediment

Author: WuZhiJun
Tutor: WangErLi
School: Liaoning Technical University
Course: Environmental Engineering
Keywords: Liaohe Sediment Ammonia Adsorption
CLC: X522
Type: Master's thesis
Year: 2009
Downloads: 112
Quote: 0
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Abstract


Ammonia as an important factor causing eutrophication of of Liaohe the long-term water quality monitoring , is one of of Liaohe the main pollutants . Liaohe in the bottom of the water due to long-term pollution state has accumulated a large amount of contaminated sediments , these contaminated sediments will play a high concentration of ammonia nitrogen adsorption , desorption occurs when a low concentration of ammonia nitrogen will . Ammonia nitrogen in the Liaohe sediment environment in the stability , adsorption and desorption of the system , Liaohe River water pollution governance , in particular, will provide a scientific basis for data governance of the nitrogen pollution in sediments . Waterford store , the paper select the Liaohe River Bridge of the Lu family sloppy Hill Bridge , Hongmiao Bridge , the Xing'an five major sectional sediment , using laboratory simulation studies of the Liaohe sediment adsorption ammonia . The course of the study , for each sectional sediment using eight different concentrations of ammonia standard solution and after air-drying the sediment samples were mixed, after determination of the concentration of ammonia nitrogen balance after the shock and the calculated amount of adsorption , summarizes the initial concentration on the adsorption the amount of the impact , and its adsorption isotherm fitting . The experiment also selected five different pH levels with 5 different temperature levels to study the impact of environmental factors such as temperature and pH of the sediment adsorption of ammonia nitrogen , and organic matter content of the sediment adsorbed ammonia . The study results show that : the experiment selected five sections , the choice of the standard solution of different concentrations , the standard dissolved ammonia concentration is higher , the greater the amount of adsorption , and the conversion of each section sediment adsorption and desorption , adsorption and desorption equilibrium ammonia standard solution concentration points in Liaohe sectional ammonia long-term average concentration near ; each section sediments of rivers in the concentration range of the experiments using the standard solution of ammonia adsorption are in line with the Freundlich isotherm equation ; temperature and pH changes will affect sediment ammonia adsorption temperature increased sediment reduce the pH value increased sediment elevated ammonia adsorption amount of ammonia adsorption amount , but the impact of temperature and pH on the the Liaohe sediment adsorbed ammonia is not great ; exhibit a positive correlation between the content of organic matter in the sediment and ammonia nitrogen adsorption scale .

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