Pedosphere 23(3): 395--401, 2013
ISSN 1002-0160/CN 32-1315/P
©2013 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Influence of copper on transport and dissipation of lambda-cyhalothrin and cypermethrin in soils |
LIU Jun1,2, LÜ Xiao-Meng3, XIE Ji-Min3, LI Ping-Ping4 , HAN Jian-Gang1 and SUN Cheng5 |
1 School of the Environment, Jiangsu University, Zhenjiang 212013 (China)
2State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)
3School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (China)
4Jiangsu Provincial Key Laboratory of Modern Agricultural Equipment and Technology, Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013 (China)
5State Key Lab of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210093 (China) |
| ABSTRACT |
| Repeated applications of bordeaux mixture (a blend of copper sulfate and calcium hydroxide) and pyrethroid insecticides (Pys) have led to elevated copper (Cu) and Pys concentrations in vineyard surface soils. To understand the potential influence of Cu on the fate of Pys in the soil environment, we selected two Pys, cypermethrin (CPM) and lambda-cyhalothrin (λ-CHT), and two typical Chinese vineyard soils, Haplic Acrisol and Luvic Phaeozem, as experimental samples. The dissipation experiment was conducted at room temperature in the dark, and the transport of both Pys through the soils was investigated using soil thin-layer chromatography. The results showed that the transport of Pys in both soils increased as the Cu2+ concentration increased from 0 to 100 mg L-1, and Pys were more transportable in Haplic Acrisol (HA) than in Luvic Phaeozem (LP) under the same experimental conditions. For CPM, only 100 mg L-1 of Cu2+ significantly (P < 0.05) increased Pys transport through both soils relative to water. Lambda-CHT was significantly (P < 0.05) transported through HA by all the Cu2+ concentrations compared to water, and all but the 1 mg L-1 of Cu2+ significantly (P < 0.05) increased the transport of λ-CHT through LP relative to water. However, the dissipation rates of CPM and λ-CHT decreased with the addition of Cu to soils. Our findings suggest that the risk of groundwater contamination by Pys increases in the soils with elevated Cu concentrations. |
| Key Words: Haplic Acrisol, Luvic Phaeozem, potential ecological risk, pyrethroid insecticides, soil thin-layer chromatography |
| Citation: Liu, J., LÜ Xiao-Meng, Xie, J. M., Li, P. P., Han, J. G. and Sun, C. 2013. Influence of copper on transport and dissipation of lambda-cyhalothrin and cypermethrin in soils. Pedosphere. 23(3): 395-401. |
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