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| Effects of Different Oscillation Modes on Extraction of Available Heavy Metals in Soils |
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| KeyWord:oscillation instruments; oscillation modes; soil; available heavy metals; extraction |
| Author Name | Affiliation | | Lu Ming-chao | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China
University of Chinese Academy of Sciences, Beijing 100049, China | | SONG Jing | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China
University of Chinese Academy of Sciences, Beijing 100049, China | | YU Hai-bo | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China | | ZHANG Dong | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China | | WU Peng | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: |
| The differences in oscillation modes while using different oscillation equipment may have some influence on the results obtained. This study evaluated the effects of different oscillation modes on extraction of available heavy metals in soils. Four historically contaminated paddy soils were extracted with 0.43 mol·L-1 HNO3 and 0.01 mol·L-1 CaCl2 for 2 hours on a planetary rotary shaker（RTO）, reciprocating oscillator（RCO） and cyclotron oscillation incubator（CYO） at six different oscillation modes. The total molar concentration of heavy metals in four soils extracted by HNO3 were significantly higher with cyclotron oscillation（CYO） than with reciprocating oscillation（RCO） and planetary rotary oscillation（RTO1,corotation 30 r·min-1）, but CaCl2-extractable metals were higher with planetary rotary oscillation（RTO1） than cyclotron oscillation（CYO） and reciprocating oscillation（RCO）. Differences in metals extraction also existed at different modes of the planetary rotary oscillation. The results indicate that oscillation modes should be taken into consideration when comparing data of extractable heavy metals from different labs. |
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