本文選題：天然礦物 + 二氧化硅支撐體��； 參考：《膜科學與技術》2016年03期

【摘要】：采用懸浮粒子法制備天然礦物納米級陶瓷膜.壓汞儀和掃描電鏡的結果表明,所制備陶瓷膜的孔徑在3~12nm之間,厚度約30μm.X射線衍射分析的結果說明,燒結過程發(fā)生了kaolinite相的轉變;對比原料粉體與膜的紅外光譜結果發(fā)現(xiàn),燒結后,膜層內(nèi)依然保留大量內(nèi)羥基,且Al—O—Al鍵也得到增強;X-射線熒光光譜的結果顯示,天然礦物以SiO_2和Al_2O_3為主,從而推斷原料應屬于頁硅酸鹽.通過死端截留,得到膜的純水通量為1 456L/(m~2·h·MPa),其對磷酸三鈉(Na_3PO_4)具有良好的截留性能,隨鹽濃度的升高,截留率有所下降,但下降幅度減小.膜的動電性質表明,Na_3PO_4溶液中的膜表面具有負電勢,其對磷酸鹽的高截留率源于膜表面與PO_4~(3-)的靜電排斥作用.
[Abstract]:Nano-sized ceramic membranes of natural minerals were prepared by suspension particle method. The results of mercury porosimeter and scanning electron microscope showed that the pore size of the prepared ceramic membrane was between 3~12nm and the thickness of 30 渭 m 路m. X ray diffraction analysis showed that the phase transition of kaolinite occurred in the sintering process, and compared with the infrared spectra of the raw powder and the film, it was found that, After sintering, a large number of hydroxyl groups remained in the film, and the Al-O-Al bond was also enhanced by X- ray fluorescence spectra. The results showed that the natural minerals were Sio _ 2 and Al _ 2O _ 3, which suggested that the raw materials should belong to pagosilicate. By dead end interception, the pure water flux of the membrane was 1 456 L / m ~ (-1) 路m ~ (2 +) MPA, which had a good retention performance to Na3PO _ (4). With the increase of salt concentration, the retention rate decreased, but the decrease range was decreased. The electrokinetic properties of the membrane indicate that the surface of the membrane has negative potential and its high rejection rate to phosphate is due to the electrostatic repulsive effect between the membrane surface and the PO4 / P _ 4 ~ (3).
【作者單位】： 北京工商大學材料與機械工程學院;北京化工大學化工資源有效利用國家重點實驗室;中國航天科技集團公司第一研究院第七0三研究所;
【基金】：國家高技術研究發(fā)展計劃項目(2009AA03Z802) 北京工商大學青年教師科研啟動基金(QNJJ2015-30)
【分類號】：TQ174.75

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本文編號：2049149