酒石酸、柠檬酸和苹果酸对污染土壤中镧的去除效果
发布时间:2018-11-13 14:14
【摘要】:通过振荡淋洗法研究了酒石酸、柠檬酸和苹果酸在不同浓度、淋洗时间和p H值条件下对2种污染农田土壤中镧(La)的去除效率。结果表明,在25℃、200 r·min-1恒温振荡条件下,3种淋洗剂对人工污染土壤镧的淋洗率均随浓度的增加而增加,随淋洗时间的延长而增加至稳定状态,随着p H值的增加呈先增加后减小趋势。3者的最佳淋洗浓度、时间和p H值分别为0.01 g·m L-1、4 h和5.0,在此条件下,酒石酸、柠檬酸和苹果酸对w(La)为300 mg·kg-1人工污染土壤的最佳淋洗率分别为57.13%、62.32%和54.86%,对w(La)为2 500 mg·kg-1人工污染土壤的最佳淋洗率分别为74.39%、77.94%和72.75%,对w(La)为463.6 mg·kg-1的矿区土壤的最佳淋洗率分别为17.8%、23.7%和24.3%。综合考虑土壤中La的去除效果和成本,选择柠檬酸作为最佳淋洗剂。
[Abstract]:The removal efficiency of lanthanum (La) in two polluted farmland soils under different concentrations, elution time and pH value of tartaric acid, citric acid and malic acid was studied by oscillatory leaching method. The results showed that under the condition of 25 鈩,
本文编号:2329392
[Abstract]:The removal efficiency of lanthanum (La) in two polluted farmland soils under different concentrations, elution time and pH value of tartaric acid, citric acid and malic acid was studied by oscillatory leaching method. The results showed that under the condition of 25 鈩,
本文编号:2329392
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