本文選題：過氧化鈦 + 制備條件　； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：近年來,隨著經(jīng)濟(jì)的飛速發(fā)展,染料廣泛應(yīng)用于印刷、造紙、紡織、電鍍、食品、化妝品和藥品等行業(yè),是水污染的主要來源。染料廢水色度高,p H較低且顯酸性,化學(xué)需氧量、鹽分含量高,可生化性差,是難處理的廢水之一。眾多工業(yè)生產(chǎn)過程如礦冶、機(jī)械、制造、化工、電子、儀表等都會(huì)產(chǎn)生重金屬廢水,造成重金屬離子污染。含重金屬的水被人飲用后,重金屬會(huì)在人體內(nèi)進(jìn)行累積,并且不具有生物可降解性,這將導(dǎo)致人體生理機(jī)能紊亂,產(chǎn)生各種疾病,對(duì)人體健康造成嚴(yán)重危害。因此,將染料和重金屬從水體中去除尤為重要。目前,吸附法因其高效與簡單的特點(diǎn)而廣泛應(yīng)用于污水處理中,制備新型高效的吸附劑已成為研究的熱點(diǎn)。鈦基納米結(jié)構(gòu)材料具有優(yōu)良的光、電、磁及催化性能,在眾多領(lǐng)域有著廣泛的應(yīng)用,在污水處理中也有著廣闊的應(yīng)用前景。但是,到目前為止,對(duì)鈦的過氧化物的研究相對(duì)較少。論文利用水熱法通過改變氨水的滴加量及滴加速度、過氧化氫的滴加量,制備出了不同的過氧化鈦吸附劑。本文以亞甲基藍(lán)為目標(biāo)污染物進(jìn)行吸附實(shí)驗(yàn),探究出了過氧化鈦吸附劑的最佳制備條件是:體系p H為9.0、最高溫度為40℃,過氧化氫滴加量為35 m L,最佳條件下制備出的過氧化鈦對(duì)亞甲基藍(lán)的平衡吸附量為263.25 mg/g。通過X射線衍射(XRD)、掃描電子顯微鏡掃描(SEM)、透射電子顯微鏡掃描(TEM)、熱重-差示掃描量熱(TG-DSC)、傅立葉紅外光譜(FT-IR)、X射線光電子能譜(XPS)、Zeta電位等測試分析技術(shù)對(duì)過氧化鈦樣品進(jìn)行了形貌和結(jié)構(gòu)表征。表征結(jié)果表明制備的過氧化鈦樣品是以無定形形式存在的,結(jié)構(gòu)中含有過氧鍵和羥基基團(tuán),加熱易分解。本文還以鎘離子、銅離子、鋅離子為目標(biāo)污染物,探究了過氧化鈦吸附劑對(duì)重金屬的吸附性能,結(jié)果表明過氧化鈦對(duì)重金屬的吸附可以在短時(shí)間內(nèi)達(dá)到平衡,最佳條件制備的過氧化鈦吸附劑對(duì)鎘離子、銅離子、鋅離子的平衡吸附量分別為137.13、112.28、101.93 mg/g。利用吸附等溫線模型對(duì)過氧化鈦對(duì)重金屬的吸附結(jié)果進(jìn)行擬合,發(fā)現(xiàn)其對(duì)重金屬的吸附過程符合Langmuir吸附等溫式;對(duì)過氧化鈦對(duì)重金屬的吸附數(shù)據(jù)進(jìn)行動(dòng)力學(xué)擬合,得出其符合準(zhǔn)二級(jí)吸附動(dòng)力學(xué)方程。在此基礎(chǔ)上,本文對(duì)過氧化鈦吸附重金屬的吸附機(jī)理進(jìn)行了探討,發(fā)現(xiàn)吸附過程是以擴(kuò)散-靜電吸附為主的吸附。論文研究結(jié)果為廢水處理,尤其是含陽離子染料和重金屬離子的廢水處理提供了一種新方法,具有重要的環(huán)境、經(jīng)濟(jì)與社會(huì)效益。
[Abstract]:In recent years, with the rapid development of economy, dyes are widely used in printing, papermaking, textile, electroplating, food, cosmetics and pharmaceuticals, and are the main sources of water pollution. Dyestuff wastewater is one of the refractory wastewater due to its low chromaticity and acidity, high chemical oxygen demand, high salt content and poor biodegradability. Many industrial production processes such as mining, machinery, manufacturing, chemical, electronic, instrumentation and so on will produce heavy metal wastewater, resulting in heavy metal ion pollution. After drinking the water containing heavy metals, the heavy metals will accumulate in the human body and have no biodegradability, which will lead to the disorder of physiological function of human body, produce various diseases, and cause serious harm to human health. Therefore, the removal of dyes and heavy metals from water is particularly important. At present, adsorption method is widely used in wastewater treatment because of its high efficiency and simplicity. Titanium-based nanostructured materials have excellent optical, electrical, magnetic and catalytic properties, and have been widely used in many fields, and also have a broad application prospect in wastewater treatment. However, so far, the peroxides of titanium have been studied relatively little. Different titanium peroxide adsorbents were prepared by hydrothermal method by changing the amount and acceleration of ammonia and hydrogen peroxide. In this paper, methylene blue was used as the target pollutant for adsorption experiments. The optimum preparation conditions of titanium peroxide adsorbent were found as follows: ph = 9.0, maximum temperature 40 鈩，

本文編號(hào)：1983989