Leaching behavior and ESEM characterization of water-sensitive mudstone in Southwestern Taiwan

Hung Ta Chen, Tzong Tzeng Lin, Juu En Chang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This investigation attempts to understand the critical soluble salts in natural mudstone and the leaching, microstructural, and microchemical characteristics in soaked mudstone using scanning electron microscopy (SEM)/energy-dispersive X-ray analysis (EDAX), X-ray fluorescence spectrometry (XRF), X-ray diffractometry (XRD), conductivity measurement, ion chromatography (IC), and environmental scanning electron microscopy (ESEM)/EDAX techniques. Natural mudstone probably includes soluble salts such as Na2SO4, NaCl, NaCO3, and CaCO3. The dissolution of Na2SO4 controls water-sensitive mudstone very susceptible to slaking and dispersion. ESEM micrographs clearly show evidence of mudstone-slaking during soaking since the visible pores are filled with small aggregative masses. A calcium-bearing precipitate from the soaked mudstone is speculated to be attributable to the decomposition of the hydrated product of the fresh mudstone.

Original languageEnglish
Pages (from-to)909-922
Number of pages14
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume38
Issue number5
DOIs
Publication statusPublished - 2003 May 19

All Science Journal Classification (ASJC) codes

  • Environmental Engineering

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