Competitive Sorption between Oxalate and Phosphate in Soil: An Environmental Chemistry Laboratory Using Ion Chromatography
Competitive Sorption between Oxalate and Phosphate in Soil: An Environmental Chemistry Laboratory Using Ion Chromatography
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土壤中草酸盐和磷酸盐之间的竞争吸附：使用离子色谱法的环境化学实验室
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
G. Pierzynski
中科院分区：
文献类型：
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作者：
K. Xia;G. Pierzynski
通过室内实验，向学生介绍土壤中阴离子的吸附与解吸这一重要的化学现象。在这个实验中，草酸盐和磷酸盐在氧化铝和温带土壤上的竞争性吸附进行了评估。使用批量平衡技术在两个pH水平下进行测试。离子色谱法用于同时测定实验中采集的水样中的草酸盐和磷酸盐。本实验结果清楚地表明，某些植物根系的草酸盐渗出物可能有助于它们在缺磷土壤中获得磷。学生们获得了离子色谱的实践经验，并了解了影响阴离子在土壤环境中行为的重要化学因素及其对植物的潜在影响。本实验练习适用于化学、环境化学和仪器分析的本科或硕士课程。
A laboratory experiment was developed to introduce students to an important chemical phenomenon, anion sorption and desorption in the soil. In this lab exercise, competitive sorption between oxalate and phosphate was evaluated on aluminum oxide and a soil from a temperate region. Testings were done at two pH levels using a batch equilibrium technique. Ion chromatography was used for simultaneous measurement of oxalate and phosphate in water samples collected from the experiment. The results from this experiment clearly illustrated that oxalate exudation by the roots of certain plants may help them obtain phosphorus in phosphorus-deficient soils. Students gained hands-on experience in ion chromatography and knowledge about important chemical factors affecting the behavior of anions in the soil environment and their potential effects on plants. This lab exercise would be appropriate for use in undergraduate or master-degree courses in chemistry, environmental chemistry, and instrumental analysis.