Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

Utilization of Biosolid for Enhanced Heavy Metal Removal and Biomass Production in Contaminated Soils

중금속 오염 토양 복원 및 바이오메스 생산량 증대를 위한 biosolid 활용

  • Kim, Kwon-Rae (Division of Environmental Science and Ecologycal Engineering, Korea University) ;
  • Naidu, Ravi (University of South Australia, CRC CARE) ;
  • Kim, Jeong-Gyu (Division of Environmental Science and Ecologycal Engineering, Korea University)
  • 김권래 (고려대학교 환경생태공학부) ;
  • ;
  • 김정규 (고려대학교 환경생태공학부)
  • Received : 2010.07.19
  • Accepted : 2010.10.01
  • Published : 2010.10.30
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Abstract

Cleaning up the landfill soil by phytoremediation in association with biomass production and utilization of biosolid as a soil amendment will be an attractive green technology. In order to examine this integrated green technology, in the current study of pot trial, heavy metal removal rate and biomass production were determined following cultivation of three different plant species in the landfill soil incorporated with biosolid at two different levels (25 ton $ha^{-1}$ and 50 ton $ha^{-1}$). Among the three plant species including Indian mustard (Brassica juncea), giant sunflower (Helianthus giganteus. L), and giant cane (Arundo donax. L), sunflower appeared to produce the largest biomass yield (19.2 ton $ha^{-1}$) and the produced amounts were magnificently increased with biosolid treatment compared to the control (no biosoild treatment). The increased production associated with biosolid treatment was common for other plant species and this was attributed to the biosolid originated nutrients as well as the improved soil physical properties due to the organic matter from biosolid. The elevated heavy metals in soil which was originated from the incorporated biosolid were Cu and Zn. Based on the phytoavailable amount of heavy metals from biosolid, the removed amount by plant shoots were 95% and 165% for Cu and Zn, respectively, when sunflower was grown. This indicated that mitigation of heavy metal accumulation in soils achieved by the removal of metal through sunflower cultivation enables the successive treatment of biosolid to soils. Moreover, sunflower showed heavy metal stabilization ability in the rhizosphere resulting in alleviation of metal release to ground water.

Keywords

References

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