本文關鍵詞：高pH環(huán)境對膠體在飽和多孔介質中遷移的影響　出處：《中國環(huán)境科學》2017年09期 　論文類型：期刊論文

  更多相關文章： 膠體 吸附 遷移 飽和多孔介質 pH

【摘要】：以超純水漂洗和經酸處理過的玻璃微珠作為對照,通過比較在不同p H環(huán)境下膠體在兩種多孔介質中的吸附解吸行為來探討高p H環(huán)境對膠體遷移的影響.結果表明,不利條件下通過提高環(huán)境的p H可以使吸附在初級勢阱中的膠體解吸下來,從而降低膠體的吸附能力.不利條件下化學雜質有利于膠體在初級勢阱中的吸附.然而隨著環(huán)境p H的增加,這些因化學雜質而發(fā)生吸附的膠體會有部分被釋放出來.當溶液的p H增加到10或更高后,化學雜質對膠體吸附過程的影響可以忽略.膠體在多孔介質表面的吸附數量與膠體的吸附解吸過程和溶液的環(huán)境有關,尤其是高p H值環(huán)境.研究證實了傳統(tǒng)DLVO理論存在一定局限性.本研究為高p H環(huán)境在膠體遷移中發(fā)揮的作用提供了進一步的認識.
[Abstract]:In ultrapure water rinsing and the acid treated glass beads as the control, through the comparison of the different P under the environment of H colloid in two kinds of porous medium adsorption and desorption behavior of high P H to explore the environmental effects on colloid transport. The results show that under adverse conditions by improving the environment of the p H can make the colloid desorption in the primary adsorption potential in the down, thereby reducing the adsorption capacity of colloid. The chemical impurities under adverse conditions is beneficial to adsorption of colloid in the primary trap. However, with the increase of P H, the adsorption due to chemical impurities and the occurrence of colloidal gold was partly released. When the solution P increased to H 10 or higher, effect of chemical impurities on the colloid adsorption process can be neglected. In the adsorption desorption process and colloid solution adsorption surface of the porous medium and the number of colloidal environment, especially the high P H value environment. Research proves that the traditional DLV The O theory has some limitations. This study provides a further understanding of the role played by the high P H environment in colloid migration.

【作者單位】： 山西大學環(huán)境與資源學院;山西大學資源與環(huán)境工程研究所;江西師范大學鄱陽湖濕地與流域研究教育部重點實驗室;中國科學院遺傳所農業(yè)資源研究中心中國科學院農業(yè)資源重點實驗室河北省節(jié)水農業(yè)重點實驗室;
【基金】：國家自然科學基金項目(41301033)
【分類號】：X131
【正文快照】： 近年來,膠體在多孔介質中的遷移行為成為環(huán)境領域的熱門研究話題.預測膠體在多孔介質中的遷移行為一方面可以評估微生物在地下水中遷移的環(huán)境風險[1],另一方面還可以應用于生物修復[2].p H作為影響膠體在飽和多孔介質中遷移的重要因素,學者們已經進行了大量的研究[3-4].由于多，

本文編號：1412232