發(fā)布時(shí)間：2018-01-04 02:38

  本文關(guān)鍵詞：ZnO-PMMA復(fù)合材料光催化去除水中低濃度氨氮　出處：《環(huán)境科學(xué)學(xué)報(bào)》2017年02期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 納米ZnO PMMA 光催化 氨氮

【摘要】：通過(guò)水熱法制備納米ZnO,采用熱粘固法成功地將其負(fù)載于聚甲基丙烯酸甲酯(PMMA)微球表面,并對(duì)ZnO-PMMA復(fù)合材料光催化去除水中低濃度氨氮的能力進(jìn)行了考察.同時(shí),探究了負(fù)載比例、初始氨氮濃度、催化劑濃度和pH對(duì)低濃度氨氮去除效率的影響.實(shí)驗(yàn)結(jié)果顯示,PMMA改善了納米ZnO的分散性和光催化能力,ZnO-PMMA能夠有效地催化去除氨氮廢水.在汞燈照射下,當(dāng)pH=12、溫度為30℃時(shí),1 g·L~(-1)的催化劑(ZnO-PMMA)對(duì)50 mg·L~(-1)的氨氮廢水去除率達(dá)到66%,且反應(yīng)產(chǎn)物硝氮和亞硝氮含量較低,體現(xiàn)了該催化劑具有將氨氮轉(zhuǎn)化為N2的良好的光催化降解能力.同時(shí),納米材料可以簡(jiǎn)單方便地回收,減輕了對(duì)環(huán)境的潛在影響,符合綠色化學(xué)的原則.
[Abstract]:The preparation of nano ZnO by hydrothermal method, using thermal bonding method successfully loaded on the polymethyl methacrylate (PMMA) microspheres, and the ability to remove low concentration of ammonia water on ZnO-PMMA composite photocatalysts were investigated. At the same time, to explore the load ratio, initial ammonia nitrogen concentration, the effects of catalyst concentration and removal efficiency of pH low concentration of ammonia. The experimental results show that PMMA can improve the dispersion and photocatalytic ability of nano ZnO, ZnO-PMMA can effectively catalytic removal of ammonia wastewater. When the pH=12 in mercury lamp irradiation, and the temperature is 30 degrees centigrade, 1 g - L~ (-1) catalyst (ZnO-PMMA) to 50 mg (-1 - L~) the ammonia removal rate reached 66%, and the reaction product of nitrate nitrogen and nitrite nitrogen content is relatively low, reflecting the catalyst with the conversion of ammonia nitrogen is N2 good photocatalytic degradation ability. At the same time, nano materials can be simple and convenient recycling, reducing the ring The potential impact of the environment is in line with the principles of green chemistry.

【作者單位】： 南京理工大學(xué)化工學(xué)院;江蘇省農(nóng)業(yè)科學(xué)研究院農(nóng)業(yè)資源與環(huán)境研究所;
【基金】：國(guó)家自然科學(xué)基金(No.41301267) 江蘇省農(nóng)業(yè)科技自主創(chuàng)新資金項(xiàng)目(No.CX(15)1004)~~
【分類(lèi)號(hào)】：X703
【正文快照】： 2.江蘇省農(nóng)業(yè)科學(xué)研究院農(nóng)業(yè)資源與環(huán)境研究所,南京2100141引言(Introduction)隨著人類(lèi)工業(yè)、生活污水的排放,加之農(nóng)業(yè)面源污染,導(dǎo)致地表水氨氮污染嚴(yán)重.過(guò)量的氨氮會(huì)引起水體富營(yíng)養(yǎng)化,使藻類(lèi)大量增殖,對(duì)水體生態(tài)平衡和人類(lèi)健康產(chǎn)生了嚴(yán)重的危害(姜瑞等,2013).因此,迫切需要尋，

本文編號(hào)：1376691