本文選題：環(huán)糊精聚合物 + 平衡被動(dòng)采樣器　； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：水中有機(jī)污染物種類和數(shù)量與日俱增,給自然生態(tài)系統(tǒng)和人類健康造成一定影響。對(duì)這些有機(jī)污染物快速采集具有重要意義。通常目標(biāo)污染物的前處理工作量占整個(gè)分析工作量的70%-90%。被動(dòng)采樣不受突發(fā)污染事件影響,可以方便、快捷的進(jìn)行采樣。目前平衡型被動(dòng)采樣技術(shù)主要有被動(dòng)擴(kuò)散袋式采樣技術(shù)、半透膜被動(dòng)采樣技術(shù)、固相微萃取技術(shù)、薄膜擴(kuò)散平衡技術(shù)。它們存在著平衡時(shí)間較長(zhǎng),多針對(duì)于疏水性有機(jī)污染物等問題。環(huán)糊精聚合物作為吸附劑具有水凝膠結(jié)構(gòu),吸附平衡時(shí)間短,有多種吸附位點(diǎn),且具有結(jié)構(gòu)多樣性。本研究通過反相乳液聚合法合成環(huán)糊精聚合物,表征其形貌結(jié)構(gòu),通過擬合等溫吸附方程、研究環(huán)境因素對(duì)吸附的影響、計(jì)算目標(biāo)物洗脫回收率,從而考察材料的吸附性能,基于以上背景設(shè)計(jì)加工以環(huán)糊精聚合物為吸附劑的平衡被動(dòng)采樣器,用于實(shí)際水體采樣。研究結(jié)果如下：(1)通過反相乳液聚合法合成β-環(huán)糊精聚合物,篩選出80-120目的材料。材料呈均勻的球形形貌,溶脹后粒徑呈對(duì)數(shù)正態(tài)分布,平均粒徑371.00 gm,粒徑分布集中。材料溶脹率8.67 g/g,環(huán)糊精單元含量68.81%,孔尺寸5.60 nm,屬介孔范圍。(2)對(duì)p-環(huán)糊精聚合物吸附性能進(jìn)行研究。選定26種目標(biāo)化合物(如阿特拉津、苯線磷、噻菌靈、氫氯噻嗪、磺胺噻唑、磺胺吡啶等)通過序批式等溫吸附實(shí)驗(yàn),擬合等溫吸附方程,這些目標(biāo)化合物均符合Freundlich等溫吸附方程(R20.96)�？疾祀x子強(qiáng)度(Ca2+、Mg2+)、溶解性有機(jī)質(zhì)(DOM)對(duì)吸附的影響,結(jié)果發(fā)現(xiàn)這些物質(zhì)吸附不受環(huán)境因素影響�？疾炷繕�(biāo)污染物的洗脫回收率,得到對(duì)于大多數(shù)物質(zhì)回收率在70-110%之間,且相對(duì)偏差在10%以內(nèi)。(3)考慮到環(huán)糊精聚合物溶脹后不易凸附在采樣器表面,將采樣器設(shè)計(jì)成橢球形狀。選擇抗腐蝕、機(jī)械性能良好、對(duì)污染物無吸附作用的不銹鋼304材質(zhì)用于后續(xù)加工。根據(jù)材料溶脹后體積1.3 cm3和橢球體積計(jì)算公式,得到采樣器長(zhǎng)半軸0.85 cm,短半軸0.85cm,半高0.43 cm。通過模具制造、沖壓、包邊、鎖扣焊接加工成成品用于實(shí)際水體測(cè)試。選定磺胺嘧啶、磺胺噻唑、磺胺吡啶、林可霉素、磺胺地索辛五種抗生素,結(jié)果表明磺胺噻唑、磺胺吡啶Ce,pred精確度在93%-116%�；前粪奏�、林可霉素、磺胺地索辛Ce,pred精確度在54%-62%。由于是初步設(shè)計(jì)采樣器,它有待進(jìn)一步的優(yōu)化完善。
[Abstract]:The species and quantity of organic pollutants in water are increasing day by day, which has a certain impact on natural ecosystem and human health. It is of great significance for the rapid collection of these organic pollutants. Usually, the pre-treatment of target pollutants accounts for 70-90% of the total analytical work. Passive sampling is not affected by sudden pollution events, so it is convenient and fast to sample. At present, the balanced passive sampling technology mainly includes passive diffusion bag sampling, semi-permeable membrane passive sampling, solid-phase microextraction and film diffusion balance. They have many problems, such as long equilibrium time and hydrophobic organic pollutants. As an adsorbent, cyclodextrin polymer has hydrogel structure, short adsorption equilibrium time, multiple adsorption sites and structural diversity. In this study, cyclodextrin polymer was synthesized by inverse emulsion polymerization, and its morphology and structure were characterized. By fitting the isothermal adsorption equation, the influence of environmental factors on adsorption was studied, and the recovery rate of elution was calculated. Based on the above background, a balanced passive sampler with cyclodextrin polymer as adsorbent was designed and manufactured for practical water sampling. The results are as follows: (1) 尾 -cyclodextrin polymer was synthesized by inverse emulsion polymerization and 80-120 target materials were selected. After swelling, the particle size is logarithmic normal distribution, the average particle size is 371.00 gmm, the particle size distribution is concentrated. The adsorption properties of p-cyclodextrin polymer were studied with the swelling ratio of 8.67 g / g, the content of cyclodextrin in 68.81 and the pore size of 5.60 nm. 26 target compounds (such as atrazine, benzophosphorus, thiabendazole, hydrochlorothiazide, sulfathiazole, sulfampyridine, etc.) were selected to fit the isothermal adsorption equation. These target compounds all accord with Freundlich isotherm adsorption equation, R20.96. The effect of ionic strength, Ca 2 + mg 2 +, dissolved organic matter (DOM) on adsorption was investigated. The results showed that the adsorption of these substances was not affected by environmental factors. The elution recovery of the target pollutants was investigated. The results showed that the recovery rate of most substances was 70-110% and the relative deviation was less than 10%. Considering that cyclodextrin polymer swelling was not easy to protrude onto the surface of the sampler, the sampler was designed into an ellipsoid shape. Corrosion resistant, good mechanical properties, no adsorption to pollutants of stainless steel 304 material for subsequent processing. According to the formula of material swelling volume of 1. 3 cm3 and ellipsoid volume, the sampler's long half axis 0. 85 cm, short half axis 0. 85 cm and half height 0. 43 cm were obtained. Through die manufacturing, stamping, wrapping, locking welding finished products for actual water testing. Five antibiotics, sulfadiazine, sulfathiazole, sulfampyridine, lincomycin and sulfadioxacin, were selected. The results showed that the accuracy of sulfathiazole and sulfampyridine Cepred was 93-116. The accuracy of sulfadiazine, lincomycin, and sulfamethoxine is 54-62. Because it is a preliminary design sampler, it needs further optimization and improvement.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X832

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相關(guān)期刊論文 前1條

1 龔福春;何德肆;曹忠;譚淑珍;譚亞非;;白藜蘆醇作辣根過氧化物酶底物的布氏桿菌抗體酶聯(lián)免疫傳感器研究[J];分析化學(xué);2007年12期

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本文編號(hào)：1995341