吕明超,宋 静,余海波,张 栋,吴 鹏.不同振荡方式对土壤有效态重金属提取的影响[J].农业环境科学学报,2014,33(2):339-344. |
不同振荡方式对土壤有效态重金属提取的影响 |
Effects of Different Oscillation Modes on Extraction of Available Heavy Metals in Soils |
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DOI:10.11654/jaes.2014.02.019 |
中文关键词: 振荡仪器 振荡方式 土壤 有效态重金属 提取 |
英文关键词: oscillation instruments oscillation modes soil available heavy metals extraction |
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中文摘要: |
为探讨不同振荡方式对土壤有效态重金属提取的影响,选用0.43 mol·L-1 HNO3和0.01 mol·L-1 CaCl2作为提取剂,利用行星轮旋转振荡仪、往复式振荡器、回旋振荡培养箱3种设备,设置6种不同振荡方式,对4种典型历史污染农田土壤进行有效态重金属提取。结果表明:回旋振荡(CYO)下HNO3提取的4种土壤重金属总摩尔浓度均显著高于往复振荡(RCO)和行星轮旋转振荡(RTO1);行星轮旋转振荡(RTO1)下CaCl2提取的重金属总摩尔浓度均高于回旋振荡(CYO)和往复振荡(RCO)。行星轮旋转振荡下不同旋转方式和转速处理之间也存在差异:对于4种土壤,公转30 r·min-1方式下的土壤HNO3提取态重金属总摩尔浓度最低;对于浙江富阳、广东乐昌、浙江台州3种土壤,公转30 r·min-1方式下CaCl2提取的重金属总摩尔浓度最高。试验结果说明不同振荡方式对土壤有效态重金属提取具有一定的影响,因而在有效态重金属提取方法制定及实验室间比对时需考虑不同振荡方式的影响。 |
英文摘要: |
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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