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The Effects of pH on Microfluidics Flow Characteristics of Heavy Metals

중금속 오염물의 미세유체 흐름특성에 미치는 pH 영향에 관한 연구

Jung-Geun Han1
,
Dong-Chan Kim2
,
Kikwon Hong3*
한 중근1
,
김 동찬2
,
홍 기권3*
1Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
2Sudent Member, Graduate Student, Department of Civil Engineering, Chung-Ang Unic
3Research Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
*교신저자. *Corresponding Author. 
30 March 2015. pp. 23-32
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Abstract

This paper describes a flow experiment and characteristics of heavy metals based on microfluidics, in order to improve the prefabricated vertical drain system that is possible pollutants removal and soil improvement in soft ground polluted with various pollutants, simultaneously. The result showed that the surface with hydrophobic condition affected large effect on flow velocity pollutants, and pH condition was also influence factor for change of flow velocity. Especially, the flow velocity of lead has risen slightly, when pH was close to basicity in complex heavy metal. This means that lead pollutant can reduce a hydrophobic characteristic in comparison with a copper pollutant.

Keywords
Heavy metal
Microfludics
pH
Hydrophobic
Flow characteristics

본 연구에서는 지반 내 오염원제거와 저투수성 지반의 개량이 동시에 이루어 질 수 있는 연직배수시스템의 최적화 기술을 마련하기 위하여, 중금속 오염물질을 대상으로 미세유체 흐름실험을 수행하였으며, 그 결과를 바탕으로 pH조건에 따른 흐름특성을 분석하였다. 중금속 오염물에 대한 미세유체 흐름실험 결과, 소수성 성질이 반영되는 위치가 오염물의 흐름속도에 큰 영향을 미치는 것으로 분석되었으며, pH 조건이 흐름속도 변화에 영향인자로 작용하였다. 또한 복합 중금속 오염물인 경우에 pH가 염기성일수록 납의 흐름속도가 다소 증가하는 경향으로 나타났는데, 이는 납 오염물이 구리에 비하여 소수성 표면특성을 감소시킬 수 있음을 의미하는 결과라 할 수 있다.

References
1
1.Collazos, O. M., Bowders, J. J. and Bouazza, A. (2003), “Laboratory evaluation of prefabricated vertical drains for use in soil vapor extraction systems”, Journal of Ground Im-provement, Vol.7, No.3, pp.103-110.
2
2.Jung, H. I. (2003), Remediation of Contaminated Groundwater by Prefabricated Vertical Drain, 2003 Geoenvironment, Korea Institute of Civil Engineering and Building Technology, pp. 183-201.
3
3.Ko, S. O. (2002), Soil and Groundwater Remediation Tech-nologies Trends and Field Application, 2002 Geoenvironment, Korea Institute of Civil Engineering and Building Technology, pp.129-156.
4
4.Ministry of Environment (2013), White Paper of Environment, Ministry of environment, pp.108.
5
5.Park, J. J. (2007), Applicability of Prefabricated Vertical Drain System for Remediation of Contaminated Soils, Ph.D Thesis, University of Incheon.
6
6.Quaranta J., Kunberger, and Gabr M. A. (2005), “WIDE application for subsurface hydraulic head control”, ASCE-GI Specialty Conference, Geofrontiers 05, Geotechnical Special Publication No.142, Waste Containment and Remediation.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 14
  • No :1
  • Pages :23-32
  • Received Date : 2015-01-26
  • Revised Date : 2015-03-11
  • Accepted Date : 2015-03-13
  • DOI :https://doi.org/10.12814/jkgss.2015.14.1.023
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