本文選題：城市尾水　切入點：淬滅劑　出處：《安徽建筑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：由于現(xiàn)代城市污水收集與處理率的提高,污水的循環(huán)利用顯得愈發(fā)重要。在城市污水廠處理工藝中,常規(guī)指標(biāo)的處理和分析技術(shù)已經(jīng)很成熟,但對處理后尾水中有機物污染的處理與分析研究較少。在城市污水廠排放的尾水中,物質(zhì)種類繁多,且相對濃度較低。傳統(tǒng)化學(xué)分析方法的局限性,導(dǎo)致物質(zhì)的快速表征以及定量分析難以實現(xiàn),而分子光譜以其快速、靈敏的特點成為許多有機物快速表征的方法。本文主要利用熒光、紫外、中紅外光譜信息結(jié)合化學(xué)計量法所測值對城市尾水及納污河流水樣中DOM的組分、特性進(jìn)行了研究分析。主要內(nèi)容及結(jié)果分析如下:1.利用三維熒光光譜掃描技術(shù)獲取尾水中蛋白質(zhì)、腐殖質(zhì)的熒光光譜信息,利用Domflour和PARAFAC分析方法,提取主成分信息,了解尾水中溶解性有機物的組成。研究表明:城市尾水中溶解性有機物主要分為蛋白質(zhì)與腐殖質(zhì)兩大類,蛋白質(zhì)主要分為絡(luò)氨酸與色氨酸兩種物質(zhì),腐殖質(zhì)物質(zhì)主要分為胡敏酸與富里酸物質(zhì)。同時比較了納污河流上下游水樣,說明污水廠的出水對河流中有機污染物起到一定的稀釋凈化作用。2.應(yīng)用XAD-8樹脂與陰陽離子交換樹脂連用技術(shù)對低濃度的DOM水樣進(jìn)行富集分離,得到憎水性物質(zhì):憎水性堿(HOB)、憎水性酸(HOA)、憎水性中性物質(zhì)(HON),親水性物質(zhì):親水性堿(HIB)、親水性酸(HIA)、親水性中性物質(zhì)(HIN)。調(diào)解PH值至中性,于室溫條件下進(jìn)行三維熒光光譜掃描,結(jié)合中紅外光譜信息以及TOC的測定,得出憎水性物質(zhì)占總有機碳含量的75%左右,憎水性物質(zhì)HOA、HOB主要包含一些熒光性有機物如蛋白質(zhì)、磷酸鹽化合物、有機酸等物質(zhì),其中憎水性酸性物質(zhì)為憎水性物質(zhì)的主要組成成分。親水性物質(zhì)HIB、HIA、HIN主要包含了一些非熒光性有機物質(zhì)如多糖、脂類等。3.以常見的腐殖質(zhì)物質(zhì)胡敏酸和富里酸為研究對象,利用紫外、三維熒光光譜對物質(zhì)特殊化學(xué)鍵信息的提取,聯(lián)合利用化學(xué)計量法所測參數(shù)值,研究水樣中淬滅劑Fe(Ⅲ)的賦存狀態(tài),并建立尾水中溶解性有機物的識別模型。結(jié)果揭示:胡敏酸和富里酸存在熒光淬滅現(xiàn)象,并符合Stern-Volmer公式:I/I_0=1-f_c*K_c*[c]/(1+K_c*[c])。其中胡敏酸物質(zhì)的紫外光譜基本不受Fe(Ⅲ)的影響,聯(lián)合其三維熒光-紫外光譜,經(jīng)過非線性擬合后構(gòu)建了淬滅劑Fe(Ⅲ)賦存狀態(tài)的識別模型,并進(jìn)行了實際樣品的預(yù)測,效果良好。
[Abstract]:Due to the improvement of sewage collection and treatment rate, the recycling of sewage becomes more and more important. In the treatment process of municipal wastewater treatment plant, the treatment and analysis technology of conventional indexes is very mature. However, there are few studies on the treatment and analysis of organic matter pollution in the rear tail water. In the tail water discharged from the municipal wastewater treatment plant, there are many kinds of substances and the relative concentration is low. The limitation of the traditional chemical analysis method, The rapid characterization and quantitative analysis of substances are difficult to achieve, and molecular spectroscopy is a rapid and sensitive method for the characterization of organic compounds. The components of DOM in the water samples of urban tailings and polluted rivers were determined by the mid-infrared spectrum information combined with the chemometrics method. The main contents and results are as follows: 1. The fluorescence spectrum information of protein and humus in the tail water was obtained by using three dimensional fluorescence spectrum scanning technique, and the principal component information was extracted by Domflour and PARAFAC analysis. To understand the composition of dissolved organic matter in the tail water, the study shows that the dissolved organic matter in the urban tail water is mainly divided into two categories: protein and humus, and protein is mainly divided into two kinds of substances: complex aminoic acid and tryptophan. Humus substances are mainly divided into Hu Min acid and fulvic acid. At the same time, the upstream and downstream water samples of polluted rivers are compared. It is shown that the effluent of the wastewater treatment plant has a certain dilution and purification effect on organic pollutants in the river. 2. Using XAD-8 resin and anion exchange resin to enrich and separate the low concentration DOM water sample. The hydrophobic substances: hydrophobic alkaloids, hydrophobic acid, hydrophobic acid, hydrophobic neutral, hydrophilic substances: hydrophilic alkaloid, hydrophilic acid, hydrophilic neutral, hydrophilic neutral, and hydrophilic neutral were obtained. The pH value was adjusted to neutral, and the three dimensional fluorescence spectra were scanned at room temperature. Combined with the information of mid-infrared spectroscopy and the determination of TOC, it is concluded that hydrophobic substances account for about 75% of the total organic carbon content. The hydrophobic substance HOAHO-HOB mainly contains some fluorescent organic substances such as proteins, phosphate compounds, organic acids, etc. The hydrophobic acid compounds are the main components of hydrophobic substances. The hydrophilic substances HIBHIAHIN mainly contain some non-fluorescent organic substances such as polysaccharides, lipids, etc. The existence of quenching agent Fe (鈪，

本文編號：1610494