酒石酸、檸檬酸和蘋果酸對污染土壤中鑭的去除效果
發(fā)布時(shí)間:2018-11-13 14:14
【摘要】:通過振蕩淋洗法研究了酒石酸、檸檬酸和蘋果酸在不同濃度、淋洗時(shí)間和p H值條件下對2種污染農(nóng)田土壤中鑭(La)的去除效率。結(jié)果表明,在25℃、200 r·min-1恒溫振蕩條件下,3種淋洗劑對人工污染土壤鑭的淋洗率均隨濃度的增加而增加,隨淋洗時(shí)間的延長而增加至穩(wěn)定狀態(tài),隨著p H值的增加呈先增加后減小趨勢。3者的最佳淋洗濃度、時(shí)間和p H值分別為0.01 g·m L-1、4 h和5.0,在此條件下,酒石酸、檸檬酸和蘋果酸對w(La)為300 mg·kg-1人工污染土壤的最佳淋洗率分別為57.13%、62.32%和54.86%,對w(La)為2 500 mg·kg-1人工污染土壤的最佳淋洗率分別為74.39%、77.94%和72.75%,對w(La)為463.6 mg·kg-1的礦區(qū)土壤的最佳淋洗率分別為17.8%、23.7%和24.3%。綜合考慮土壤中La的去除效果和成本,選擇檸檬酸作為最佳淋洗劑。
[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,
本文編號: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,
本文編號:2329392
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