Study on Effect of Heavy Metal and Rare Earth Metal on Soil Activities

Article Preview

Abstract:

In recent years, as public awareness on environmental problems increasing, soil pollutions are received more and more attention. Choosing a suburban garden soil as objective, adding exogenous heavy metal cadmium (Cd) and rare-earth element lanthanide (La) in the soil, Cd/La single stress and combined stress on soil urease and catalase were studied. The results showed that under Cd/La single or combined processing, both soil urease and catalase activities decrease while the concentration increases. With the incubation time extending, soil urease activities first increase and then decrease, and soil catalase first reduce then increase. Cd/La single and combined process has obvious inhibition on soil urease and catalase. At the same concentration, the inhibition degree to enzyme activity was Cd>Cd, La combined> La, and the inhibition of soil urease was higher than that of catalase. Soil urease and catalase showed a significantly negative correlation under different treatments. So setting soil urease and catalase as ecological indicators to soil heavy metal and rare earth elements pollution is feasible.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 356-360)

Pages:

1126-1130

Citation:

Online since:

October 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Martin A C. Contamination by heavy metals in soils in the neighbourhood of a scrapyard of discarded vehic[J].Sci.Total Environ,1998,212(2/3),145-152.

DOI: 10.1016/s0048-9697(98)00007-2

Google Scholar

[2] WANG Huan-xiao. Pollution ecology[M].Beijing: Higher education press,2000,188-213.

Google Scholar

[3] XU Jia-lin,YANG Ju-rong.Heavy metal of land ecological system [M].Beijing: China environmental science press,1995,56.(In chinese)

Google Scholar

[4] SAWC(1990):Handbook of Standard Soil Testing Methods for Advisory Purposes.The Soit Science Society of South Africa, Soil Analysis Work Committee, Pretoria.

Google Scholar

[5] Scheffer F, Schachtschabel P (1992): Lehrbuch der Bodenkunde. EnkeVerlag, Stuttgart.

Google Scholar

[6] Zhao Yong,Li Hongjuan,Sun Zhiqiang.Correlation analysis of Cd pollution in vegetables and soils and the soil pollution threshold[J]. Transactions of the Chinese Society of Agricultural Engineering,2006,22(7),51-53.(In chinese)

Google Scholar