本文選題：甲羥孕酮　切入點：孕酮　出處：《江南大學》2012年碩士論文

【摘要】：隨著社會工農(nóng)業(yè)的不斷發(fā)展,水體污染日益加劇,飲用水受污染情況越來越嚴重。內分泌干擾物是飲用水中非常重要的一類風險物質,它是一種外源性物質,在體內干擾自然激素的合成、分泌、運輸、結合、生效和排泄過程,嚴重干擾和破壞內分泌系統(tǒng)。常規(guī)水處理工藝對內分泌干擾物不能完全去除,本文采用臭氧-活性炭深度處理技術以孕酮和甲羥孕酮為目標物進行實驗研究。首先從臭氧氧化出發(fā),探究臭氧對孕酮和甲羥孕酮的氧化降解過程,主要包括臭氧氧化動力學以及臭氧降解機理;其次從活性炭吸附處理出發(fā),探究臭氧-活性炭聯(lián)用技術對水源水的處理效果,主要包括處理出水的毒性、活性炭吸附等溫線擬合以及臭氧-活性炭聯(lián)用工藝的出水水質達標情況。主要結論如下: (1)采用臭氧氧化工藝降解甲羥孕酮,對臭氧降解過程動力學進行研究,考察液相臭氧濃度、pH、羥基自由基(·OH)清除劑(HCO3-)對降解過程的影響。臭氧在本研究條件下能夠有效降解水溶液中的甲羥孕酮,采用連續(xù)臭氧曝氣方式降解時,降解過程遵守一級反應動力學模型obs(?)采用序批式臭氧投加方式進行降解時,降解過程符合二級反應動力學模型(?)。pH的升高和HCO3-的添加都會對降解效果產(chǎn)生負面影響,甲羥孕酮的去除率從pH=3.10時的89.8%下降到pH=9.02時的74.6%,同等反應條件下,添加羥基自由基HCO3-后,降解反應速率常數(shù)由0.1463 L·(mg·min)-1下降到0.0495 L·(mg·min)-1,去除率下降了22.2個百分點。 (2)臭氧能夠有效地降解孕酮,在連續(xù)臭氧曝氣方式下,降解過程遵循一級動力學模型(?)。臭氧氧化孕酮去除率可達90%,與甲羥孕酮相同,臭氧降解孕酮同樣是在酸性條件下降解速率較高。溶液初始pH從3.23升高到11.04時,孕酮的去除率則從97%下降到了55%。自然水體中存在的HCO3-、Cl-和SO42-均對孕酮的降解過程有一定的抑制作用,只有NO3-對降解過程存在積極意義,NO3-的存在使得孕酮的降解速率提高了1.67倍。采用LC/MS分析臭氧氧化孕酮的降解途徑,并且得到A(C20H30O4),、B(C21H30O4)兩種氧化產(chǎn)物,分子量分別為334 g·mol-1和346 g·mol-1。 (3)采用煤質活性炭和椰殼活性炭對比吸附孕酮,去除率可達85%以上。且兩種活性炭的吸附過程均符合Freundlich等溫吸附方程,R20.98。通過以斑馬魚為試驗生物,對孕酮的急性毒性進行測定,得出24 h孕酮的LC50=0.73 mg·L-1,EC0=0.5 mg·L-1,EC100=1.0 mg·L-1。整個臭氧-活性炭聯(lián)合工藝對水源水中的飲用水常規(guī)指標均有很好的去除,活性炭吸附能夠很好地去除由于臭氧氧化而生成的甲醛和溴酸鹽這兩種污染物,對甲醛的去除率可達85%以上,對溴酸鹽的去除率達100%。
[Abstract]:With the development of social industry and agriculture, water pollution is becoming more and more serious, and drinking water is polluted more and more seriously. Endocrine disruptors are very important risk substances in drinking water, it is a kind of exogenous substances. Disrupting the synthesis, secretion, transport, binding, effective and excretion of natural hormones in vivo, seriously disrupting and disrupting the endocrine system. In this paper, the advanced treatment technology of ozone and activated carbon was used to study the degradation process of progesterone and medroxyprogesterone by ozone. It mainly includes the kinetics of ozone oxidation and the mechanism of ozone degradation. Secondly, from the adsorption treatment of activated carbon, the effect of ozonation combined with activated carbon on the treatment of source water is explored, including the toxicity of treated effluent. The adsorption isotherm fitting of activated carbon and the quality of the effluent from the ozonic-activated carbon combined process are up to standard. The main conclusions are as follows:. 1) degradation of medroxyprogesterone by ozone oxidation process was studied. The effects of pH value of liquid ozone concentration and hydroxyl radical scavenger (OHCO3) on the degradation process were investigated. In this study, the methyloxyprogesterone in aqueous solution could be effectively degraded by ozone, and the degradation was carried out by continuous ozone aeration. The degradation process obeys the first-order reaction kinetics model obsn? The degradation process is in accordance with the second-order reaction kinetic model. The removal rate of medroxyprogesterone decreased from 89.8% of pH=3.10 to 74.6% at pH = 9.02. Under the same reaction conditions, the hydroxyl radical HCO _ 3- was added. The degradation rate constant decreased from 0.1463 L / g min)-1 to 0.0495 L / L / mg / min ~ (-1), and the removal rate decreased by 22.2%. Ozone can effectively degrade progesterone. Under continuous ozone aeration, the degradation process follows a first-order kinetic model. The removal rate of progesterone by ozone oxidation can reach 90%, which is similar to that of medroxyprogesterone. The degradation rate of progesterone by ozone is also higher under acidic conditions. When the initial pH of the solution increases from 3.23 to 11.04, The removal rate of progesterone decreased from 97% to 55%. The degradation of progesterone was inhibited by the presence of HCO3-Cl- and SO42- in natural water. The degradation rate of progesterone was increased by 1.67 times with the presence of no _ 3-. The degradation pathway of progesterone was analyzed by LC/MS and two kinds of oxidation products were obtained, the molecular weight of which were 334g mol-1 and 346g mol -1, respectively. The removal rate of progesterone from coal activated carbon and coconut shell activated carbon was more than 85%. The adsorption process of the two kinds of activated carbon was in accordance with Freundlich isothermal adsorption equation R20.98. the acute toxicity of progesterone was determined by using zebrafish as experimental organism. The results showed that the LC50=0.73 mg L ~ (-1) EC _ (0.5) mg / L ~ (-1) EC _ (100) mg / L ~ (-1) of progesterone was 0.5 mg / L ~ (-1) for 24 h. The combined process of ozone and activated carbon had a good effect on the removal of conventional drinking water indexes in source water. The adsorption of activated carbon can remove formaldehyde and bromate which are produced by ozone oxidation. The removal rate of formaldehyde and bromate can reach more than 85% and 100% respectively.
【學位授予單位】：江南大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：R123.1

【引證文獻】

相關碩士學位論文 前1條

1 徐丹瑤;水中藥物及個人護理用品的深度處理研究[D];江南大學;2013年

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本文編號：1670271