Assessment of Koelreuteria paniculata Seedling for Phytroremediation of Pyrene-Contaminated Soils
- 31 Downloads
Phytoremediation is a cost-effective and environmentally friendly technology using plants for the cleanup of both inorganic and organic contaminated sites. In this study, a pot culture experiment has been conducted for 180 days in a greenhouse to examine the capability of Koelreuteria paniculata on pyrene (Pyr) dissipation in contaminated soil. Three treatments were employed and they were: (1) polluted soil with K. paniculata fine roots addition (T1), (2) polluted soil with planted seedlings (T2), and (3) polluted soil (C). Results showed Pyr concentration in soils was reduced by 21.4, 36.2, and 86.4% by natural losses, fine roots addition, and planted K. paniculata treatments, respectively, meaning plants substantially enhanced the dissipation of Pyr from soil. Cultivated K. paniculata seedlings significantly increased soil total nitrogen (TN), total organic carbon, dissolved organic carbon (DOC), and microbial biomass carbon, but not total phosphorus, when compared to the control. The removal efficiency of Pyr was lower in the adding of fine roots treatment than in the planted K. paniculata treatment. The principal component analysis indicated the promotional dissipation of Pyr in soil by planted K. paniculata was likely attributed to increased microbial quantity and activity, DOC, and TN content in the rhizosphere. Our results suggest that K. paniculata is a suitable plant species used in phytoremediation for Pyr-contaminated soils and the efficiency on the dissipation of Pyr is considerably enhanced using living plants than adding dead organic matters. The study provided a reference for the application of K. paniculata in the remediation of Pyr-contaminated soil.
KeywordsPhytroremediation Pyrene Rhizosphere Soil PAHs Koelreuteria paniculata
The authors thank the Key Research and Development Project of Hunan Province (2017NK2171), Ecology Discipline and Nature Science Foundation of Hunan Provincial Innovative Research Team (2013) for financial support.
- Liang, X. C., Yan, W. D., Tian, D. L., Zhu, F., Wang, G. J., & Zheng, W. (2012). Phytoremediation of polycyclic aromatic hydrocarbons in soils by Cinnamomum camphora and impact factors. Journal of Central South University of Forestry & Technology, 32(12), 177–180 (in Chinese).Google Scholar
- Lin, C. F., Yang, Y. S., Guo, J. F., Chen, G. S., & Xie, J. S. (2010). Fine root decomposition of evergreen broadleaved and coniferous tree species in mid-subtropical China: dynamics of dry mass, nutrient and organic fractions. Plant & Soil, 338(1–2), 331–327.Google Scholar
- Setiawati, T. C. (2014). Correlations between soil microbe and soil chemical properties in limestone mining area: case study at Southern Jember Indonesia. International Conference on Chemical, Environment & Biological Sciences, Sept. 17–18. Kuala Lumpur (Malaysia). https://doi.org/10.15242/IICBE.C914048.
- Shen, H. Z., Huang, Y., Wang, R., Zhu, D., Li, W., Shen, G. F., Wang, B., Zhang, Y. Y., Chen, Y. C., Lu, Y., Chen, H., Li, T. C., Sun, K., Li, B. G., Liu, W. X., Liu, J. F., & Tao, S. (2013). Global atmospheric emissions of polycyclic aromatic hydrocarbons from 1960 to 2008 and future predictions. Environmental Science & Technology, 47(12), 6415–6424.CrossRefGoogle Scholar
- Tong, J., Xiang, W. H., Liu, C., Lei, P. F., Tian, D. L., Deng, X. W., & Peng, C. H. (2012). Tree species effects on fine root decomposition and nitrogen release in subtropical forests in southern China. Transactions of the Botanical Society of Edinburgh, 5(3), 323–331.Google Scholar
- Zhang, X. Q., & Wu, K. H. (2001). Fine-root production and turnover for forest ecosystems. Scientia Silvae Sinicae, 37(3), 126–138 (in Chinese).Google Scholar
- Zhang, X. Q., Wu, K. H., & Murach, D. (2000). A review of methods for fine-root production and turnover of trees. Acta Ecologica Sinica, 20(5), 875–883 (in Chinese).Google Scholar
- Zhang, J. Y., Yu, F., & Yu, Y. C. (2017). Content and source apportionment of polycyclic aromatic hydrocarbons in surface soil in major areas of China. Ecology and Environmental Sciences, 26(6), 1059–1067 (in Chinese).Google Scholar
- Zhu, F., Tian, D. L., Yan, W. D., Liang, X. C., & Wang, G. J. (2011). Phytoremediation of polycyclic aromatic hydrocarbons contaminated soils by Koelreuteria bipinnata. Journal of Northwest Forestry University, 26(1), 52–55 (in Chinese).Google Scholar