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

  更多相關(guān)文章： 膠體 吸附 遷移 飽和多孔介質(zhì) pH

【摘要】：以超純水漂洗和經(jīng)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(zhì)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(jié)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(xué)雜質(zhì)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(xué)雜質(zhì)而發(fā)生吸附的膠體會有部分被釋放出來.當(dāng)溶液的p H增加到10或更高后,化學(xué)雜質(zhì)對膠體吸附過程的影響可以忽略.膠體在多孔介質(zhì)表面的吸附數(shù)量與膠體的吸附解吸過程和溶液的環(huán)境有關(guān),尤其是高p H值環(huán)境.研究證實(shí)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(jìn)一步的認(rèn)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(xué)環(huán)境與資源學(xué)院;山西大學(xué)資源與環(huán)境工程研究所;江西師范大學(xué)鄱陽湖濕地與流域研究教育部重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院遺傳所農(nóng)業(yè)資源研究中心中國科學(xué)院農(nóng)業(yè)資源重點(diǎn)實(shí)驗(yàn)室河北省節(jié)水農(nóng)業(yè)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(41301033)
【分類號】：X131
【正文快照】： 近年來,膠體在多孔介質(zhì)中的遷移行為成為環(huán)境領(lǐng)域的熱門研究話題.預(yù)測膠體在多孔介質(zhì)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(fēng)險[1],另一方面還可以應(yīng)用于生物修復(fù)[2].p H作為影響膠體在飽和多孔介質(zhì)中遷移的重要因素,學(xué)者們已經(jīng)進(jìn)行了大量的研究[3-4].由于多，

本文編號：1412232