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Heavy Metal Contamination in a Soil-Rice Ecosystem in the Vicinity of Abandoned Rural Unsanitary Landfill
Corresponding Author(s) : Yidong Guan
Asian Journal of Chemistry,
Vol. 25 No. 8 (2013): Vol 25 Issue 8
Abstract
The ecosystem adjacent to the abandoned rural unsanitary landfill has been contaminated. The soil cadmium was higher than the maximum allowable content of agricultural soil. There was a remarkable bioaccumulation trend of heavy metals in the rice organs. Chromium and lead contents in rice grain were much higher than the threshold levels, 2.9-6.7 folds and 1.0-1.5 folds of the legislation limits, respectively. Linear correlation analysis showed that the slightly alkaline leachate from the unsanitary landfill was one of the main factors causing the higher soil pH and then affecting the absorption of rice on the cadmium.
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References
T.H. Christensen, P. Kjeldsen, P.L. Bjerg, D.L. Jensen, J.B. Christensen, A. Baun, H.-J. Albrechtsen and G. Heron, Appl. Geochem., 16, 659 (2001).
P. Flyhammar, Sci. Total Environ., 198, 123 (1997).
H.J. Xie et al., J. Zhejiang Univ. Sci. A, 10, 439 (2009).
L. Ru-Xin, Environ. Manage. China (Chinese), 23 (2006).
T. Prechthai, P. Parkpian and C. Visvanathan, J. Hazard. Mater., 156, 86 (2008).
K.L. Zhao, X.M. Liu, J.M. Xu and H.M. Selim, J. Hazard. Mater., 181, 778 (2010).
J.J. Fu, Q.F. Zhou, J.M. Liu, W. Liu, T. Wang, Q.H. Zhang and G.B. Jiang, Chemosphere, 71, 1269 (2008).
NMSB (Ningbo Municipal Statistice Bureau) and SONBSN (Survey Office of the National Bureau of Statistice in Ningbo), Ningbo Statistical Yearbook 2006 (in Chinese), Beijing: China Statistics Press (2007).
S.D. Bao, Soil and Agricultural Chemistry Analysis, in Chinese, Beijing, China: Chinese Agricultural Press, edn. 3 (2000).
Y.Q. Ji, Y.C. Feng, J.H. Wu, T. Zhu, Z.P. Bai and C.Q. Duan, J. Environ. Sci., 20, 571 (2008).
W.G. Zhang, H. Feng, J.N. Chang, J.G. Qu, H.X. Xie and L.Z. Yu, Environ. Pollut., 157, 1533 (2009).
H.Z. Zhang, Y.M. Luo, H.B. Zhang, J. Song, J.Z. Xia and Q.G. Zhao, Acta Pedologica Sin., 47, 628 (2010).
M.B. Kirkham, Geoderma, 137, 19 (2006).
P. L., X.X. Wang, T.L. Zhang, D.M. Zhou and Y.Q. He, J. Environ. Sci., 20, 449 (2008)