Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Fundamental study on volume reduction of heavy metal-contaminated soil by magnetic separation

  • Received : 2020.03.31
  • Accepted : 2020.06.06
  • Published : 2020.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Large-scale civil engineering works discharge a large amount of soil suspension contaminated with natural heavy metals. Most of the heavy metal ions due to industrial activities and minings are accumulated in the soils and the sediments of lakes and inner bays through the rivers. It is necessary to remove heavy metals from the soils and the sediments, because some of these heavy metals, such as arsenic and cadmium, have significant biological effects even in small amounts. This study proposes a new volume reduction method of the contaminated soils and sediments by superconducting magnetic separation. Our process can remove the specific minute minerals selectively, which adsorbs heavy metals depending on pH. As a fundamental study, the adsorption behaviors of arsenic and cadmium on minute minerals as a function of pH were investigated, and the adsorption mechanism was discussed based on the crystal structure and pH dependence of surface potential in each minute minerals.

Keywords

References

  1. Taiheiyo-cement, Destination of Excavated Soil from Construction Sites, https://www.taiheiyo-cement.co.jp/english/csr/pdf/2015/Special1_p18-p19_2015.pdf.
  2. W. Tang, B. Shan, H. Zhang, W. Zhang, Y. Zhao, Y. Ding, N. Rong, and X. Zhu, "Heavy Metal Contamination in the Surface Sediments of Representative Limnetic Ecosystems in Eastern China," Scientific Reports, 2014.
  3. Ministry of the Environment, Government of Japan, National Effluent Standards, https://www.env.go.jp/en/water/wq/nes.html
  4. C. Jeon, K. Baek, J. Park, Y. Oh, and S. Lee, "Adsorption characteristics of As (V) on iron-coated zeolite," Journal of Hazard Materials, vol. 163, issues 2-3, no. 30, 2009.
  5. K. Sekiya, H. Kuwahara, Y. Yoshida, S. Igarashi, N.Nomura, F. Mishima, Y. Akiyama, and S. Nishijima, "Study on Decontamination of Contaminated Soils by Magnetic Separation," IEEE Transactions on Applied Superconductivity, vol. 24, no.3, 2014.
  6. P. Loganathan, S. Vigneswaran, J. Kandasamy, and R. Naidu, "Cadmium Sorption and Desorption in Soil: A Review," Critical reviews in environmental science and technology, Vol. 42, No. 5, pp. 489-533, 2012. https://doi.org/10.1080/10643389.2010.520234
  7. J. S. Rieuwerts, I. Thornton, M. E. Farago, and M. R. Ashmore, "Factors influencing metal bioavailability in soils: preliminary investigations for the development of a critical loads approach for metals," Chemical Speciation and Bioavailability, Vol. 10, No. 2, pp. 61-75, 1998. https://doi.org/10.3184/095422998782775835
  8. G. Sposito, "The surface chemistry of Soils," Oxford Press, pp. 234, 1984.
  9. I. Johansson and P. Somasundaran, "Handbiik for Cleaning/Decontamination of Surface," Elsevier, 2007.
  10. M. S. Morey, G. D. Stucky, S. Schwarz, and M. Froba, "Isomorphic Substitution and Postsynthesis Incorporation of Zirconium into MCM-48 Mesoporous Silica," The Journal of Physical Chemistry B, Vol. 103, No. 12, pp. 2037-2041, 1999. https://doi.org/10.1021/jp980844t
  11. S. Igarashi, F. Mishima, Y. Akiyama, and S. Nishijima, "Fundamental study of cesium decontamination from soil by superconducting magnet," Physica C: Superconductivity, vol. 494, no. 15, pp. 221-224, 2013. https://doi.org/10.1016/j.physc.2013.05.019
  12. S. Nishijima, Y. Akiyama, F. Mishima, T. Watanabe, T. Yamasaki, S. Nagaya, and S. Fukui, "Study on Decontamination of Radioactive Cesium from Soil by HTS Magnetic Separation System," IEEE Transactions on Applied Superconductivity, vol. 23, issue 3, 2013.