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http://dx.doi.org/10.9727/jmsk.2019.32.4.249

Characteristics of Sulfuric Acid Neutralization by Geomedia from Korea with Relevance to Chemical Spill Accidents  

Lee, Yoonho (Korea Institute of Geoscience and Mineral Resources)
Hyun, Sung Pil (Korea Institute of Geoscience and Mineral Resources)
Moon, Hee Sun (Korea Institute of Geoscience and Mineral Resources)
Shin, Doyun (Korea Institute of Geoscience and Mineral Resources)
Lee, Eunhee (Korea Institute of Geoscience and Mineral Resources)
Yoo, Jae-Young (Kangwon National University)
Publication Information
Journal of the Mineralogical Society of Korea / v.32, no.4, 2019 , pp. 249-258 More about this Journal
Abstract
Acid spill accidents are frequently occurring in Korea with increasing production, use, storage, and transport of acids, accompanying industrialization and economic growth. The acids introduced to the subsurface environments would eventually be neutralized by reactions with geomedia. However, the spatial and temporal extent to which the spilled acids would affect will be dependent on the characteristics of the geomedia exposed to the acids. In this work, sulfuric acid, the most used acid in Korea, was reacted with a set of model geomedia representative of the geology of Korea. The buffering capacity of the model geomedia was determined through batch-type experiments using pH changes as an indicator. X-ray diffraction was used to identify the mineral phases contributing to the acid neutralization. The results showed that sandstone had the largest acid neutralization capacity among the tested geomedia, while kaolinite had the smallest. The findings of this study would contribute to quantitatively assessing the impact of spilled acids on geomedia and hence to predicting the vulnerability of geomedia to the spilled acid.
Keywords
sulfuric acid; geomedia; neutralization capacity; chemical accidents;
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