DOI QR코드

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Remediation of heavy metal-contaminated soils using eco-friendly nano-scale chelators

  • Lim, Heejun (Civil and Environmental Engineering, Konkuk University) ;
  • Park, Sungyoon (Civil and Environmental Engineering, Konkuk University) ;
  • Yang, Jun Won (Civil and Environmental Engineering, Konkuk University) ;
  • Cho, Wooyoun (Civil and Environmental Engineering, Konkuk University) ;
  • Lim, Yejee (Civil and Environmental Engineering, Konkuk University) ;
  • Park, Young Goo (Sehwa E&F) ;
  • Kwon, Dohyeong (Civil and Environmental Engineering, Konkuk University) ;
  • Kim, Han S. (Civil and Environmental Engineering, Konkuk University)
  • 투고 : 2017.12.20
  • 심사 : 2018.01.18
  • 발행 : 2018.05.25

초록

Soil washing is one of the most frequently used remediation technologies for heavy metal-contaminated soils. Inorganic and organic acids and chelating agents that can enhance the removal of heavy metals from contaminated soils have been employed as soil washing agents. However, the toxicity, low removal efficiency and high cost of these chemicals limit their use. Given that humic substance (HS) can effectively chelate heavy metals, the development of an eco-friendly, performance-efficient and cost-effective soil washing agent using a nano-scale chelator composed of HS was examined in this study. Copper (Cu) and lead (Pb) were selected as target heavy metals. In soil washing experiments, HS concentration, pH, soil:washing solution ratio and extraction time were evaluated with regard to washing efficiency and the chelation effect. The highest removal rates by soil washing (69% for Cu and 56% for Pb) were achieved at an HS concentration of 1,000 mg/L and soil:washing solution ratio of 1:25. Washing with HS was found to be effective when the pH value was higher than 8, which can be attributed to the increased chelation effect between HS and heavy metals at the high pH range. In contrast, the washing efficiency decreased markedly in the low pH range due to HS precipitation. The chelation capacities for Cu and Pb in the aqueous phase were determined to be 0.547mmol-Cu/g-HS and 0.192mmol-Pb/g-HS, respectively.

키워드

과제정보

연구 과제 주관 기관 : Korea Institute of Energy Technology Evaluation and Planning (KETEP), Ministry of Trade, Industry and Energy (MOTIE), National Research Foundation

참고문헌

  1. Arias, M., Barral, M.T. and Mejuto, J.C. (2002), "Enhancement of copper and cadmium adsorption on kaolin by the presence of humic acids", Chemosphere, 48(10), 1081-1088. https://doi.org/10.1016/S0045-6535(02)00169-8
  2. Ashley, J.T.F. (1996), "Adsorption of Cu (II) and Zn (II) by estuarine, riverine and terrestrial humic acids", Chemosphere, 33(11), 2175-2187. https://doi.org/10.1016/0045-6535(96)00324-4
  3. Bolan, N., Kunhikrishnan, A., Thangarajan, R., Kumpiene, J., Park, J., Makino, T., Kirkham, M.B. and Scheckel, K. (2014), "Remediation of heavy metal (loid) s contaminated soils-to mobilize or to immobilize", J. Hazard. Mater., 266, 141-166. https://doi.org/10.1016/j.jhazmat.2013.12.018
  4. Dube, A., Kowalkowski, R.Z.T., Cukrowska, E. and Buszewski, B. (2001), "Adsorption and migration of heavy metals in soil", Pol. J. Environ. Stud., 10, 1-10.
  5. Elliott, H.A. and Shastri, N.L. (1999), "Extractive decontamination of metal-polluted soils using oxalate", Water Air Soil Poll., 110(3), 335-346. https://doi.org/10.1023/A:1005067404259
  6. Fan, Q., Shao, D., Lu, Y., Wu, W. and Wang, X. (2009), "Effect of pH, ionic strength, temperature and humic substances on the sorption of Ni (II) to Na-attapulgite", Chem. Eng. J., 150(1), 188-195. https://doi.org/10.1016/j.cej.2008.12.024
  7. Goyal, M.K. and Chauhan, A. (2015), "Environmental pollution remediation through solidification/fixation of heavy metal ions in Portland cement", J. Environ. Anal. Toxicol., 5, 1-7.
  8. Jiang, W., Tao, T. and Liao, Z. (2011), "Removal of heavy metal from contaminated soil with chelating agents", Open. J. Soil Sci., 1, 70-76. https://doi.org/10.4236/ojss.2011.12010
  9. Kang, C.S., Eaktasang, N. and Kim, H.S. (2014), "Enhanced current production by Desulfovibrio desulfuricans biofilm in a mediator-less microbial fuel cell", Bioresource Technol., 165, 27-30. https://doi.org/10.1016/j.biortech.2014.03.148
  10. Kim, H.J., Suma, Y., Lee, S.H., Kim, J. and Kim, H.S. (2012), "Immobilization of horseradish peroxidase onto clay minerals using soil organic matter for phenol removal", J. Mol. Catal. BEnzym., 83, 8-15. https://doi.org/10.1016/j.molcatb.2012.06.012
  11. Kim, M.C. and Kim, H.S. (2013), "Artificial and enhanced humification of soil organic matter using microwave irradiation", Environ. Sci. Pollut. R., 20(4), 2362-2371. https://doi.org/10.1007/s11356-012-1116-5
  12. Kulikowska, D., Gusiatin, Z.M., Bulkowska, K. and Kierklo, K. (2015), "Humic substances from sewage sludge compost as washing agent effectively remove Cu and Cd from soil", Chemosphere, 136, 42-49. https://doi.org/10.1016/j.chemosphere.2015.03.083
  13. Lee, S.H., Lee, S.H., Ryu, S.J., Kang, C.S., Suma, Y. and Kim, H.S. (2013), "Effective biochemical decomposition of chlorinated aromatic hydrocarbons with a biocatalyst immobilized on a natural enzyme support", Bioresource Technol., 141, 89-96. https://doi.org/10.1016/j.biortech.2013.01.159
  14. Lestan, D., Luo, C. and Li, X. (2008), "The use of chelating agents in the remediation of metal-contaminated soils: A review", Environ. Pollut., 153(1), 3-13. https://doi.org/10.1016/j.envpol.2007.11.015
  15. Li, Z., Ma, Z., Duijp, T.J., Yuan, Z. and Huang, L. (2014), "A review of soil heavy metal pollution from mines in china: Pollution and health risk assessment", Sci. Total. Environ., 468, 843-853.
  16. Liang, L., Luo, L. and Zhang, S. (2011), "Adsorption and desorption of humic and fulvic acids on SiO2 particles at nanoand micro-scales", Colloid. Surface. A, 384(1-3), 126-130. https://doi.org/10.1016/j.colsurfa.2011.03.045
  17. Lim, T., Tay, J. and Wang, J. (2004), "Chelating-agent-enhanced heavy metal extraction from a contaminated acidic soil", J. Environ. Eng., 130(1), 59-66. https://doi.org/10.1061/(ASCE)0733-9372(2004)130:1(59)
  18. Rao, C.R.M., Sahuquillo, A. and Lopez Sanchez, J.F. (2008), "A review of the different methods applied in environmental geochemistry for single and sequential extraction of trace elements in soils and related materials", Water Air Soil Poll., 189(1-4), 291-333. https://doi.org/10.1007/s11270-007-9564-0
  19. Senesi, N., Miano, T.M., Provenzano, M.R. and Brunetti, G. (1991), "Characterization, differentiation and classification of humic substances by fluorescence spectroscopy", Soil Sci., 152, 259-271. https://doi.org/10.1097/00010694-199110000-00004
  20. Sparks, D.L. (1998), Soil Physical Chemistry, CRC Press, Boca Raton, Florida, U.S.A.
  21. Stevenson, F.J. (1982), Humus Chemistry: Genesis, Composition, Reactions, New Jersey, Wiley, U.S.A.
  22. Tang, W., Zeng, G., Gong, J., Liang, J., Xu, P., Zhang, C. and Huang, B. (2014), "Impact of humic/fulvic acid on the removal of heavy metals from aqueous solutions using nanomaterials: A review", Sci. Total Environ., 468, 1014-1027.
  23. Tejowulan, R.S. and Hendershot, W.H. (1998), "Removal of trace metals from contaminated soils using EDTA incorporating resin trapping techniques", Environ. Pollut., 103(1), 135-142. https://doi.org/10.1016/S0269-7491(98)00080-3
  24. Ure, A.M., Quevauviler, P., Muntau, H. and Griepink, B. (1993), "Speciation of heavy metals in solids and harmonization of extraction techniques undertaken under the auspices of the BCR of the commission of the European communities", J. Environ. An. Ch., 51(1-4), 135-151. https://doi.org/10.1080/03067319308027619
  25. US EPA (1996), A Citizen's Guide to In-Situ Soil Flushing: Solid Waste and Emergency Response (510G), US EPA, EPA 542-F-96-006, U.S.A.
  26. Wuana, R.A., Okieimen, F.E. and Imborvungu, J.A. (2010), "Removal of heavy metals from a contaminated soil using organic chelating acids", J. Environ. Sci. Technol., 7(3), 485-496.
  27. Xiong, J., Koopal, L.K., Weng, L., Wang, M. and Tan, W. (2015), "Effect of soil fulvic and humic acid on binding of Pb to goethite-water interface: Linear additivity and volume fractions of HS in the stern layer", J. Colloid Interf. Sci., 457, 121-130. https://doi.org/10.1016/j.jcis.2015.07.001
  28. Yun, S.M., Kang, C.S., Kim, J. and Kim, H.S. (2015), "Evaluation of soil flushing of complex contaminated soil: An experimental and modeling simulation study", J. Hazard. Mater., 287, 429-437. https://doi.org/10.1016/j.jhazmat.2015.01.062