Development of Profitable Phytoremediation of Contaminated Soils with Biofuel Crops

Kokyo Oh, Tao Li, Hongyan Cheng, Xuefeng Hu, Chiquan He, Lijun Yan, Yonemochi Shinichi

Center for Environmental Science in Saitama, Saitama, Japan.
College of Resources and Environment, Shanxi University, Taiyuan, China.
School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China.

DOI: 10.4236/jep.2013.44A008                

Abstract

Contamination of agricultural soil has been a worldwide concern, and phytoremediation is a promising alternative to conventional soil clean-up technology as a low cost and environment-friendly technology. However, the field application of phytoremediation is still limited, because of its low efficiency and long-period needed. In this paper, with discussion of the characteristics, mechanisms and development of phytoremediation, we suggested a profitable phytoremediation strategy using biofuel crops for both utilization and remediation of contaminated soil. In this strategy, the owners of contaminated sites possibly cost nothing, but obtain income through selling the biofuel crop for factories produced biofuel, thus the practical application of phytoremediation can be effectively promoted. In order to test the feasibility of the suggested strategy, a hydroponic cultural experiment and a pot experiment were carried out to assess the phytoremediation potential of some biofuel crops. The hydroponic cultural experiment showed that the two biofuel plants, sunflower and maize, had a better or similar accumulation level of Pb, Cu and Cd than the two accumulator plants. The pot cultural experiment showed that wheat and barley with white-rot-fungus inoculation greatly promoted crop biomass, soil microbial population, and dioxins removal efficiency. These results indicate that phytoremediation using biofuel plants possibly works effectively for remediation of contaminated soils as well as provide economic benefits to the owners of contaminated sites. Therefore, biofuel crops would be a reasonable choice for phytoremediation of contaminated soils.

Keywords

Contaminated Soil; Heavy Metals; Organic Contaminants; Phytoremediation; Biofuel Plants

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	W. X. Zhu, “Consideration of Soil Ecological Processes in Restoration and Succession,” Phytoecological Sinica, Vol. 29, No. 3, 2005, pp. 479-486.
[2]	“China Environmental Network,” 2010. http://www.cenews.com.cn/xwzx/fz/qt/201012/t20101231_691319.html.
[3]	K. Oh, S. Hosono, Q. Lin, Y. H. Xie, F. Y. Li, C. J. Jiang and T. Hirano, “Remediation of Dioxin-Contaminated Soil with Combination of Biofuel Crops and White Rot Fungus,” Organohalogen Compounds, Vol. 71, 2009, pp. 1177-1182.
[4]	X. J. Wang, F. Y. Li, M. Okazaki and M. Sugisaki, “Phytoremediation of Contaminated Soil,” Annual Report CESS, Vol. 3, 2003, pp. 114-123.
[5]	O. V. Singh and R. K. Jain, “Phytoremediation of Toxic Aromatic Pollutants from Soil,” Applied Microbiological Biotechnology, Vol. 63, 2003, pp. 128-135. P. Ji, T. Sun, Y. Song, M. L. Ackland and Y. Liu, “Strategies for Enhancing the Phytoremediation of Cadmium-Contaminated Agricultural Soils by Solanum nigrum L.,” Environmental Pollution, Vol. 159, No. 3, 2011, pp. 762-768. doi:10.1016/j.envpol.2010.11.029
[6]	Y. Z. Gao and L. Z. Zhu, “Phytoremediation and Its Models for Organic Contaminated Soils,” Journal of Environmental Science, Vol. 15, No. 3, 2003, pp. 302-310. C. A. Salt, R. D. Smith and I. Raskin, “Phytoremediation,” Annual Review of Plant Physiology and Plant Molecular Biology, Vol. 49, 1998, pp. 643-648. doi:10.1146/annurev.arplant.49.1.643
[7]	P. Ahmadpour, F. Ahmadpour, T. M. M. Mahmud, Arifin Abdu, M. Soleimani and F. H. Tayefeh, “Phytoremediation of Heavy Metals: A Green Technology,” African Journal of Biotechnology, Vol. 11, No. 76, 2012, pp. 14036-14043. doi:10.5897/AJB12.459
[8]	K. Oh, S. Hosono, Q. Lin, Y. H. Xie, F. Y. Li, C. J. Jiang and T. Hirano, “Remediation of Dioxin-Contaminated Soil with Combination of Biofuel Crops and White Rot Fungus,” Organohalogen Compounds, Vol. 71, 2009, pp. 1177-1182.
[9]	I. D. Pulford and C. Watson, “Phytoremediation of Heavy Metal-Contaminated Land by Trees—A Review,” Environmental International, Vol. 29, 2003, pp. 529-540. doi:10.1016/S0160-4120(02)00152-6
[10]	K. Oh, T. Li, H. Y. Cheng, X. Hu, Q. Lin and Y. Xie, “A Primary Study on Assessment of Phytoremediation Potential of Biofuel Crops in Heavy Metal Contaminated Soil,” Applied Mechanics and Materials, Vol. 295-298, 2013, pp. 1135-1138. doi:10.4028/www.scientific.net/AMM.295-298.1135
[11]	W. Chintakovid, P. Visoottiviseth, S. Khokiattiwong and S. Lauengsuchonkul, “Potential of the Hybrid Marigolds for Arsenic Phytoremediation and Income Generation of Remediators in Ron Phibun District, Thailand,” Chemosphere, Vol. 70, No. 8, 2008, pp. 1532-1537. doi:10.1016/j.chemosphere.2007.08.031
[12]	R. B. Meagher, “Phytoremediation of Toxic Elemental and Organic Pollutants,” Current Opinion Plant Biology, Vol. 3, 2000, pp. 153-162. doi:10.1016/S1369-5266(99)00054-0
[13]	B. Robinson, S. Green, T. Mills, B. Clothier, M. van der Velde, R. Laplane, et al., “Phytoremediation: Using Plants as Biopumps to Improve Degraded Environments,” Australian Journal of Soil Research, Vol. 41, No. 3, 2004, pp. 599-611. doi:10.1071/SR02131
[14]	E. Lombi, “Phytoremediation of Heavy Metal-Contaminated Soils: Natural Hyperaccumulation versus Chemically Enhanced Phytoextraction,” Journal of Environmental Quality, Vol. 30, 2001, pp. 1919-1926. doi:10.2134/jeq2001.1919
[15]	B. E. Pivetz, “Phytoremeidation of Contaminated Soil and Ground Water at Hazardous Waste Sites,” 2001.
[16]	K. Oh., M. Sugisaki, S. Hosono, F. Li and T. Hirano, “Study on Remediation of Dioxin-Contaminated Soil by Plant-Microbial Combinations,” Organohalogen Compounds, Vol. 69, 2005, pp. 2536-2539.
[17]	X. D. Huang, Y. El-Alawi, J. Gurska, B. R. Glick and B. M. Greenberg, “A Multi-Process Phytoremediation System for Decontamination of Persistent Total Petroleum Hydrocarbons (TPHs) from Soils,” Microchemical Journal, Vol. 81, 2005, pp. 139-147. doi:10.1016/j.microc.2005.01.009
[18]	E. M. Cooper and J. T. Sims, “Chelate-Assisted Phytoextraction of Lead from Contaminated Soils,” Journal of Environmental Quality, Vol. 28, No. 6, 1999, pp. 1709-1719. doi:10.2134/jeq1999.00472425002800060004x
[19]	EPA, “Introduction to Phytoremediation,” Environmental Protection Agency, Washington, 2000.
[20]	EPA, “Use of Field-Scale Phytotechnology for Chlorinated Solvents, Metals, Explosives and Propellants, and Pesticides,” 2005.
[21]	M. H. Wong, “Ecological Restoration of Mine Degradation Soils, with Emphasis on Metal Contaminated Soils,” Chemosphere, Vol. 50, 2003, pp. 775-780. doi:10.1016/S0045-6535(02)00232-1
[22]	W. S. Shu, “Use of Vetiver and Other Three Grasses for Revegetation of Pb/Zn Mine Tailings at Lechang, Guangdong Province: Field Experiment,” 2nd International Vetiver Conference, Bangkok, 2000.