本文選題：焦磷酸鉀 + 淋洗　； 參考：《環(huán)境工程學(xué)報(bào)》2017年02期

【摘要】：焦磷酸鉀是一種對(duì)農(nóng)田土壤環(huán)境友好的物質(zhì)。通過批處理振蕩淋洗實(shí)驗(yàn)研究了所配制的焦磷酸鉀淋洗液對(duì)模擬污染土壤中重金屬銅的淋洗特性,探討了淋洗時(shí)間、淋洗液pH和焦磷酸鉀濃度對(duì)淋洗效果的影響,并討論了土壤中銅在焦磷酸鉀淋洗液作用下的解吸動(dòng)力學(xué)和淋洗前后重金屬形態(tài)變化特性。結(jié)果表明,淋洗時(shí)間越長(zhǎng)、淋洗液濃度越大,淋洗效果越好。優(yōu)化實(shí)驗(yàn)條件,淋洗浸提24 h、淋洗液pH為7.0、n(焦磷酸鉀)∶n(銅)為7∶1,淋洗效果較好,銅淋洗率為40.51%。焦磷酸鉀淋洗的銅主要以酸提取態(tài)和可還原態(tài)為主。焦磷酸鉀淋洗液對(duì)土壤銅的浸提過程符合雙常數(shù)方程,說明土壤中銅在焦磷酸鉀淋洗液作用下的解吸是非均相擴(kuò)散過程。
[Abstract]:Potassium pyrophosphate is a kind of friendly substance to farmland soil environment. The leaching characteristics of heavy metal copper in simulated contaminated soil were studied by batch treatment, and the effects of leaching time, pH of leaching solution and concentration of potassium pyrophosphate on the leaching effect were discussed. The desorption kinetics of copper in soil under the action of potassium pyrophosphate leaching solution and the speciation characteristics of heavy metals before and after leaching were discussed. The results showed that the longer the elution time, the greater the concentration of eluent and the better the elution effect was. The optimum conditions were as follows: leaching and leaching for 24 h, pH value of leaching solution was 7: 1 (potassium pyrophosphate: n) = 7: 1, the elution effect was better, the leaching rate of copper was 40.51. The copper eluted by potassium pyrophosphate mainly consists of acid extractable state and reducible state. The leaching process of soil copper by potassium pyrophosphate solution accords with the double constant equation, which indicates that the desorption of copper in soil under the action of potassium pyrophosphate leaching solution is a heterogeneous diffusion process.
【作者單位】： 廣東工業(yè)大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：廣東省自然科學(xué)基金資助項(xiàng)目(2015A030313483)
【分類號(hào)】：X53

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