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| Experimental Study on Determination Method of Ammonium Content in Denitrated Fly Ash |
1 China Guangdong Nuclear Power Engineering Co., Ltd., 2 China Building Materials Science Research Institute 3 China Institute of Water Resources and Hydropower Research 4 Beijing University of Chemical Technology
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Abstract Through the experiment, the extraction method of residual ammonium in fly ash was optimized, and the preparation parameters of the fly ash ammonium solution in the distillation titration method were determined. At the same time, the ammonium ion content in the fly ash was determined by distillation titration and ion chromatography, the repeatability and reproducibility of the quantitative testing method for determining residual ammonium in fly ash was verified; and a method for determining residual ammonium content in fly ash was established. The results show that in the distillation titration method, the solution preparation parameters and the titration method have a significant effect on the detection results of the ammonium ash content of the fly ash, and the test accuracy can be improved by specifying the preparation parameters of the solution and the skilled titration method. The repeatability and reproducibility of the results of the distillation titration test meet the precision requirements and it can be used as a standard method for determining the residual ammonium content in fly ash. The results obtained by ion chromatography are slightly lower than the distillation titration method and can be used as a substitute.
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Received: 28 May 2018
Published: 24 January 2019
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