• Title/Summary/Keyword: Mineral resources

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The Current Status of Strong Acids Production, Consumption, and Spill Cases in Korea (사고 누출 화학물질 중 강산의 생산, 사용 현황 및 사고 사례 분석)

  • Shin, Doyun;Moon, Hee Sun;Yoon, Yoon Yeol;Yun, Uk;Lee, Yunho;Ha, Kyoochul;Hyun, Sung Pil
    • Journal of Soil and Groundwater Environment
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    • v.19 no.6
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    • pp.6-12
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    • 2014

  • We reviewed literature focusing on the amounts of domestic production, distribution, and consumption of strong acids and their spill cases. In particular, we investigated the chemistry and toxicity of four strong acids classified as "accident preparedness substances," including hydrochloric, nitric, sulfuric, and hydrofluoric acid. We recommend sulfuric and hydrofluoric acid as the chemicals of priority control based on the amounts used and toxicity. An advanced prevention/response system needs to be established along with an improved human and social infrastructure to prevent and efficiently respond to chemical accidents. Understanding the behavior and transport of spilled strong acids in the soil and groundwater environments requires a multi-disciplinary approach since they go through a variety of chemical and biogeochemical reactions with complex geomedia. However, no such research has been done in this area in Korea to the best of our knowledge. We expect the results of this study to contribute as basic data to future research.

  • https://doi.org/10.7857/JSGE.2014.19.6.006 인용 PDF KSCI KPUBS HTML

Induced Polarization Surveys of Contaminants and Introduction to Case Studies (오염원에 대한 유도분극탐사 반응 및 사례 소개)

  • Kim, Bitnarae;Caesary, Desy;Yu, Huieun;Cho, AHyun;Song, Seo Young;Cho, Sung Oh;Joung, Inseok;Nam, Myung Jin
    • Journal of Soil and Groundwater Environment
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    • v.25 no.2_spc
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    • pp.86-100
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    • 2020

  • Analyzing and monitoring environmental contaminants based on geophysical exploration techniques have become important and it is now widely applied to delineate spatial distribution geophysical characteristics in wide area. Among the techniques, induced polarization (IP) method, which measures polarization effects on electrical potential distribution, has drawn much attention as an effective tool for environmental monitoring since IP is sensitive to changes in biochemical reactions. However, various reactions stemming from the presence of multiple contaminants have greatly enhanced heterogeneity of polluted sites to result in highly variable electrical characteristics of the site. Those contaminants influence chemical and physical state of soil and groundwater to alter electrical double layer, which in turn influences polarization of the media. Since biochemical reactions between microbes and contaminants result in various IP effects, IP laboratory experiments were conducted to investigate IP responses of the contaminated soil samples under various conditions. Field IP surveys can delineate the spatial distribution of contamination, while providing additional information about electrical properties of a target medium, together with DC resistivity. Reviewing IP effects of contaminants as well as IP surveys can serve as a good starting point for the application of IP survey in site assessment for environmental remediation.

  • https://doi.org/10.7857/JSGE.2020.25.s1.086 인용 PDF KSCI HTML

Enhancement of Physical Modeling System for Underwater Moving Object Detection (이동하는 수중 물체 탐지를 위한 축소모형실험 시스템 개선)

  • Kim, Yesol;Lee, Hyosun;Cho, Sung-Ho;Jung, Hyun-Key
    • Geophysics and Geophysical Exploration
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    • v.22 no.2
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    • pp.72-79
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    • 2019

  • Underwater object detection method adopting electrical resistivity technique was proposed recently, and the need of advanced data processing algorithm development counteracting various marine environmental conditions was required. In this paper, we present an improved water tank experiment system and its operation results, which can provide efficient test and verification. The main features of the system are as follows: 1) All the processes enabling real time process for not only simultaneous gathering of object images but also the electrical field measurement and visualization are carried out at 5 Hz refresh rates. 2) Data acquisition and processing for two detection lines are performed in real time to distinguish the moving direction of a target object. 3) Playback and retest functions for the saved data are equipped. 4) Through the monitoring screen, the movement of the target object and the measurement status of two detection lines can be intuitively identified. We confirmed that the enhanced physical modeling system works properly and facilitates efficient experiments.

  • https://doi.org/10.7582/GGE.2019.22.2.072 인용 PDF KSCI HTML