Abstract
In this chapter, the aim of our study is to evaluate dustfall’s physical and chemical changes in acid conditions. pH and conductivity variation of reaction solution are measured by time. FTIR, SEM, and ICP analysis is applied to analyze the residuum and filtrate after the experiment. The results of conductivity variation show that the conductivity increases quickly in the first 10 min, then decreases slowly. pH of reaction solution keeps increasing in the first 4 h. Both the pH and conductivity become stable after 4 h. The combined analysis of XRD and FTIR spectrum of residuum and initial sample indicates that calcite and dolomite in dustfall are dissolved completely in the 0.05 M citric acid solution in 2 days. Besides, metal cations are extracted, including Ca2+, K+, Mg2+, Fe3+, Al3+, and Si. In general, after the dissolution of dustfall in citric acid, minerals are dissolved in different degrees, and metal elements are extracted. Carbonate minerals are almost dissolved completely, and the structures of silicate minerals change with the extraction of elements.
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Acknowledgments
This research is conducted as a part of study on the repercussion between inhalable particles and microbe, which is funded by National Natural Science Foundation of countries (No.41130746).
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Tang, J., Dong, F., Dai, Q., Deng, Y., Zhou, S., Chen, W. (2015). Dissolution Characteristic Study on Dustfall in Citric Acid. In: Dong, F. (eds) Proceedings of the 11th International Congress for Applied Mineralogy (ICAM). Springer Geochemistry/Mineralogy. Springer, Cham. https://doi.org/10.1007/978-3-319-13948-7_31
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DOI: https://doi.org/10.1007/978-3-319-13948-7_31
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