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http://dx.doi.org/10.17820/eri.2017.4.4.193

Changes in Soil Properties Related to Soil Function due to Chemical Spills with Strong Acid and Base  

Jeon, Inhyeong (Department of Civil and Environmental Engineering, Seoul National University)
Jung, Jae-Woong (Gyeongnam Department of Environmental Toxicology and Chemistry, Korea Institute of Toxicology)
Nam, Kyoungphile (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Ecology and Resilient Infrastructure / v.4, no.4, 2017 , pp. 193-199 More about this Journal
Abstract
In this study, changes of soil properties including soil texture, specific surface area, organic matter content, pH, cation exchange capacity and exchangeable cations content were investigated in response to strong acid or base accident. The properties changed significantly when the soil reacted with 10 M HCl or 1 M NaOH (i.e., when one gram of soil received 50 and 5 mmol of HCl or NaOH), respectively. When the soil reacted with 10 M HCl or 1 M NaOH solution, soil texture changed from sandy loam to loamy sand and specific surface areas decreased from $5.84m^2/g$ to 4.85 and $1.92m^2/g$, respectively. The soil organic matter content was reduced from 3.23% to 0.96 and 0.44%, and the soil pH changed from 5.05 to 2.35 and 10.65, respectively. The cation exchange capacity decreased from 10.27 cmol/kg to 4.52 and 5.60 cmol/kg, respectively. Especially, high concentrations of $Al^{3+}$ or $Na^+$ were observed in acidic or basic spills, respectively, which is likely to cause toxicity to terrestrial organisms. The results suggest that restoration of soil properties, as well as soil remediation, needs to be carried out to maintain the soil function in chemical spill sites.
Keywords
Acid-base reaction; Chemical spills; Soil properties; Terrestrial organisms;
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