本文選題：砷吸附效率　切入點(diǎn)：聚芳醚砜酮　出處：《北京林業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：最近幾年,砷污染問題變得越來越嚴(yán)重,亟待有效的處理措施降低砷對(duì)人類生活健康的侵害。本論文將超濾技術(shù)和吸附法相結(jié)合,將吸附劑添加到超濾膜中制備出一種復(fù)合膜,使其具備以下優(yōu)點(diǎn),一則具備優(yōu)異的膜性能,二則具備良好的除砷效能。本論文通過溶膠-凝膠相轉(zhuǎn)化法制備了含有不同種類無機(jī)/有機(jī)添加劑的二氮雜萘聯(lián)苯聚芳醚砜酮(PPESK)超濾膜,并研究了聚合物濃度、不同種類無機(jī)/有機(jī)添加劑對(duì)PPESK超濾膜性能的影響以及優(yōu)化PPESK膜的除砷效能。通過實(shí)驗(yàn)確定優(yōu)化PPESK膜配方為：14.0 wt.%PPESK,N-甲基吡咯烷酮(NMP)為溶劑,3.0 wt.%聚氧乙烯-聚氧丙烯-聚氧乙烯共聚物(PEO-PPO-PEO)作為第一添加劑,3.0 wt.%草酸作為第二添加劑,1.2 wt.%JR05型納米二氧化鈦為第三添加劑。實(shí)驗(yàn)結(jié)果顯示,只有優(yōu)化PPESK膜及納米二氧化鈦單體可以對(duì)砷進(jìn)行去除；且在相同砷濃度水樣中,優(yōu)化PPESK膜對(duì)砷的吸附量高于納米二氧化鈦單體。對(duì)于優(yōu)化PPESK膜應(yīng)用性研究來說,1)當(dāng)過濾時(shí)間由0分鐘增加到20分鐘時(shí),,砷吸附效率由100%降低至73.7%；2)隨著水樣中含砷濃度由0增加到0.5 mg/L時(shí),砷吸附效率由100%減小至8.3%；3)當(dāng)溫度變化范圍為20-40℃時(shí),砷吸附效率變化不大,基本保持在78.5%左右；4)當(dāng)操作壓力由0.05 MPa增加到0.25 MPa時(shí),砷吸附效率由86.6%略微降低至70.8%；5)隨著料液pH由3增加至5時(shí),砷吸附效率基本穩(wěn)定在85.0%左右,當(dāng)pH進(jìn)一步增加至11時(shí),砷吸附效率減小至63.4%。
[Abstract]:In recent years, the problem of arsenic pollution has become more and more serious, and it is urgent to take effective measures to reduce the harm of arsenic to human health. In this paper, a composite membrane was prepared by adding adsorbent into ultrafiltration membrane by combining ultrafiltration technology with adsorption method. Make it have the following advantages, one has excellent film performance, In this paper, a novel ultrafiltration membrane containing different inorganic / organic additives was prepared by sol-gel phase inversion method, and the polymer concentration was studied. The effect of different inorganic / organic additives on the performance of PPESK ultrafiltration membrane and the arsenic removal efficiency of PPESK membrane were optimized. The optimized formula of PPESK membrane was determined as: 1: 14.0 wt.10% PPESKN- methylpyrrolidone as solvent 3. 0 wt.% polyoxyethylene-polyoxypropylene. -PEO-PPO-PEO) as the first additive, 3.0wt.% oxalic acid as the second additive and 1.2 wt.%JR05 nano-TiO _ 2 as the third additive. Arsenic can be removed only by optimizing the PPESK membrane and nano-TiO _ 2 monomer, and in the same arsenic concentration water sample, The arsenic adsorption capacity of optimized PPESK membrane is higher than that of nano-TiO _ 2 monomer. For the application study of optimized PPESK membrane, the arsenic adsorption efficiency decreases from 100% to 73.7% with the increase of filtration time from 0 minutes to 20 minutes. When the concentration increased from 0 to 0. 5 mg/L, The arsenic adsorption efficiency decreased from 100% to 8.3 鈩，

本文編號(hào)：1574508