本文關(guān)鍵詞： 有序介孔材料 納米零價(jià)鐵 三硝基甲苯 雙溶劑法 還原　出處：《水處理技術(shù)》2017年09期 　論文類型：期刊論文

【摘要】：以短孔道的六方板有序介孔材料Zr-Ce-SBA-15為載體,采用雙溶劑浸漬-煅燒-H_2還原的方法合成納米零價(jià)鐵(nZVI)限域在有序介孔孔道內(nèi)的復(fù)合材料。用這一復(fù)合材料處理三硝基甲苯(TNT),考察其對TNT的還原性能以及復(fù)合材料的載鐵量、投加量、pH對TNT去除率的影響。結(jié)果表明,加大復(fù)合材料鐵負(fù)載量和投加量,溶液中TNT的去除率增大,酸性條件能促進(jìn)反應(yīng)進(jìn)行,提高TNT的去除率,堿性條件則相反。采用鐵硅摩爾比為0.15的nZVI/Zr-Ce-SBA-15復(fù)合材料,在投加量為1g/L、TNT初始質(zhì)量濃度為20mg/L、pH為3時(shí),溶液中TNT的去除率為98.4%。對TNT還原反應(yīng)產(chǎn)物的傅里葉紅外光譜步析表明,復(fù)合材料中的nZVI將TNT還原為氨基化合物。
[Abstract]:The ordered mesoporous material Zr-Ce-SBA-15 of hexagonal plate with short pore channel was used as the carrier. The nanocomposite with zero valence iron (nZVI) in the ordered mesoporous channel was synthesized by double solvent impregnation and calcination Hs2 reduction method. The composite was used to treat TNT with trinitrotoluene (TNT). The reduction properties of TNT, the amount of iron loaded in the composite and the effect of pH on the removal rate of TNT were investigated. The results showed that the amount of iron load and dosage of the composite was increased. The removal rate of TNT in the solution was increased, and the acid condition could promote the reaction and increase the removal rate of TNT. The basic condition is the opposite. The initial mass concentration of nZVI/Zr-Ce-SBA-15 is 20mg / L at the dosage of 1 g / L ~ (-1) L ~ (-1) L ~ (-1), using nZVI/Zr-Ce-SBA-15 composite with a molar ratio of 0. 15 to Fe ~ (2 +) ~ (2 +). The removal rate of TNT in the solution was 98.4 when pH was 3:00. The FTIR analysis of the products of the TNT reduction reaction showed that the TNT in the composite was reduced to amino compound by nZVI.
【作者單位】： 江蘇城市職業(yè)學(xué)院環(huán)境與生態(tài)學(xué)院;南京理工大學(xué)環(huán)境與生物工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51078184) 高等學(xué)校科技創(chuàng)新工程重大項(xiàng)目培育資金項(xiàng)目(708049) 江蘇省自然科學(xué)基金資助(BK2009392)
【分類號】：TB33;X703
【正文快照】： 納米零價(jià)鐵(n ZVI)粒徑小、活性高、價(jià)格低廉、自身以及氧化產(chǎn)物對環(huán)境友好等優(yōu)點(diǎn),在環(huán)境修復(fù)中具有顯著的優(yōu)勢和發(fā)展前景。目前,在降解有機(jī)鹵代物、有機(jī)染料、重金屬離子以及硝基芳香烴化合物等方面都取得了很好的效果[1-5]。但是n ZVI顆粒粒徑小,容易發(fā)生團(tuán)聚使其比表面積降，

本文編號：1477414