發(fā)布時間：2018-01-04 02:38

  本文關鍵詞：ZnO-PMMA復合材料光催化去除水中低濃度氨氮　出處：《環(huán)境科學學報》2017年02期 　論文類型：期刊論文

  更多相關文章： 納米ZnO PMMA 光催化 氨氮

【摘要】：通過水熱法制備納米ZnO,采用熱粘固法成功地將其負載于聚甲基丙烯酸甲酯(PMMA)微球表面,并對ZnO-PMMA復合材料光催化去除水中低濃度氨氮的能力進行了考察.同時,探究了負載比例、初始氨氮濃度、催化劑濃度和pH對低濃度氨氮去除效率的影響.實驗結果顯示,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pH=12、溫度為30℃時,1 g·L~(-1)的催化劑(ZnO-PMMA)對50 mg·L~(-1)的氨氮廢水去除率達到66%,且反應產物硝氮和亞硝氮含量較低,體現了該催化劑具有將氨氮轉化為N2的良好的光催化降解能力.同時,納米材料可以簡單方便地回收,減輕了對環(huán)境的潛在影響,符合綠色化學的原則.
[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】： 南京理工大學化工學院;江蘇省農業(yè)科學研究院農業(yè)資源與環(huán)境研究所;
【基金】：國家自然科學基金(No.41301267) 江蘇省農業(yè)科技自主創(chuàng)新資金項目(No.CX(15)1004)~~
【分類號】：X703
【正文快照】： 2.江蘇省農業(yè)科學研究院農業(yè)資源與環(huán)境研究所,南京2100141引言(Introduction)隨著人類工業(yè)、生活污水的排放,加之農業(yè)面源污染,導致地表水氨氮污染嚴重.過量的氨氮會引起水體富營養(yǎng)化,使藻類大量增殖,對水體生態(tài)平衡和人類健康產生了嚴重的危害(姜瑞等,2013).因此,迫切需要尋，

本文編號：1376691