| 柠檬酸对石灰岩溶蚀动力模拟及岩溶意义 |
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| 引用本文： | 曹建华,潘根兴,袁道先.柠檬酸对石灰岩溶蚀动力模拟及岩溶意义[J].中国岩溶,2001,20(1):1-4. |
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| 作者姓名： | 曹建华 潘根兴 袁道先 |
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| 作者单位： | 1.南京农业大学农业资源与生态环境研究所 2.中国地质科学院岩溶地质研究所、国土资源部岩溶动力学开放研究实验室 |
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| 基金项目： | 国家自然科学基金项目(49632100、49972087、30060022)、国土资源部重点科技项目(2000208)资助 |
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| 摘 要： | 柠檬酸对未清洗的石灰岩颗粒(直径0.15～0.25mm)的溶蚀模拟试验表明,石灰岩溶蚀释放的钙离子量呈对数式增加。随柠檬酸浓度(10mg /l, 50mg /l,100mg /l)的增加,溶液的初始pH依次降低,而石灰岩颗粒溶出的钙离子依次升高,它们分别是去离子水溶出量的1.77、4.25、5.03倍。100mg /l柠檬酸, 10×10- 2atmCO2 和50mg /l柠檬酸+5×10-2atm CO2 对石灰岩微颗粒的溶蚀释放的钙离子量大致相当。这表明有机酸亦是岩溶动力系统重要的驱动力。
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| 关 键 词： | 柠檬酸 石灰岩溶蚀 模拟试验 |
| 文章编号： | 1001-4810(2001)01-0001-04 |
| 修稿时间： | 2000年11月10 |
SIMULATION EXPERIMENT ON DISSOLUTION OF CALCITE BY CITRIC AND ITS KARST IMPORTANCE |
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| CAO Jian-hu,PAN Gen-xing and YUAN Dao-xian.SIMULATION EXPERIMENT ON DISSOLUTION OF CALCITE BY CITRIC AND ITS KARST IMPORTANCE[J].Carsologica Sinica,2001,20(1):1-4. |
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| Authors: | CAO Jian-hu PAN Gen-xing and YUAN Dao-xian |
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| Institution: | 1.College of Resources and Environment,Nanjing Agricultural University 2.Institute of Karst Geology,CAGS |
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| Abstract: | The simulation experiment of calcite grains eroded by citric was carried out. The calcite was ground into grains with the diameter 0.15～0.25mm. Labile calcium in the soil and limestone powders on the interface of soil-rock were taken into account, therefore, the fresh calcite grains were not washed. The concentrations of citric solutions were 10mg/l, 50mg/l, and 100mg/l respectively. The results showed that the amount of released calcium from calcite increased in logarithm. High contents of citric solution could result in more calcite dissolution.The amount of released calcium from the calcite in 10mg/l, 50mg/l, 100mg/l citric solutions was 1.77, 4.25, 5.03 times as much as that in deionized water respectively. The dissolution amount of 100mg/l citric was matched with those of 10×10-2 atm CO2 and 50mg/l citric+5×10-2 atm CO2. Consequently, organic acid is one of the important driving forces in karst dynamic systems. |
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| Keywords: | Citric Calcite dissolution Simulation experiment |
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