| 光谱学与光谱分析 |
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| Determination of Heavy Metals in Artificial Soil on Railway Rock-Cut Slopes by Microwave Digestion-AAS |
| CHEN Zhao-qiong1, 2, FANG Chen1, AI Ying-wei1*, GAO Hong-ying1, PAN Dan-dan1, LI Xin-yue1 |
1. Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu 610064, China
2. Chengdu Medical College, Chengdu 610083, China |
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Abstract The purpose of this paper is as follows: (1) Optimizing the parameters of microwave digestion-atomic absorption spectroscopy (AAS) and establishing method for the determination of heavy metals in artificial soils. (2) Evaluating heavy metal pollution conditions in artificial soil samples from railway rock-cut slopes. The results showed that the mixture of HNO3-H2O2-HF was found to have the best digestion efficiency; under the optimized conditions, the recoveries of the method ranged from 95% to 105%; the measurement precision and the relative deviation were less than 4% and 5%, respectively; the concentrations of Cd, Pb and Zn were significantly higher in the artificial soil on railway rock-cut slope than in the control soil, and they were 4.7, 1.3 and 1.2 times as much as the control soil, respectively; compared to the contents of Cr, Cu and Fe in control soils, there was no significant difference. This research will provide a reliable method for determining metal elements in artificial soils on rock-cut slopes and a theoretical basis for the management of the railway rock-cut slopes.
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Received: 2012-12-25
Accepted: 2013-03-26
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Corresponding Authors:
AI Ying-wei
E-mail: aiyw99@sohu.com
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