本文選題：農藥 + 煙嘧磺隆�。� 參考：《齊魯工業(yè)大學》2016年碩士論文

【摘要】：隨著農藥工業(yè)與現(xiàn)代農業(yè)的迅猛發(fā)展,種類繁多的除草劑被大量施用,與此同時,進入環(huán)境水體中的除草劑的數量和種類不斷增加,這也必然對生態(tài)環(huán)境帶來一定的污染,同時對自然和人類帶來較大的風險。本文選用煙嘧磺隆為典型代表的磺酰脲類農藥除草劑作為目標污染物進行降解,通過對比實驗、單因素實驗等方法研究了煙嘧磺隆影響因素及降解規(guī)律,確定了UV-電化學體系的最佳反應條件,對反應過程進行了動力學分析并且根據降解產物推斷降解途徑。主要內容如下:1)研究了煙嘧磺隆模擬廢水在高級氧化法和生物化學體系下的降解過程。在高級氧化法降解煙嘧磺隆的實驗中分別應用了電化學、光化學、UV-電化學體系,各體系的降解率分別為63.8%,45.8%,99.1%。實驗結果表明高級氧化法對煙嘧磺隆降解均有去除效果,但UV-電化學體系對煙嘧磺隆去除效果最佳。在生物化學體系下,采用了好氧活性污泥法對煙嘧磺隆進行降解,研究了降解過程中溫度、反應時間、體系pH值等因素的影響,并通過優(yōu)化得到了最佳降解率為83.2%,驗證了煙嘧磺隆的可生化性。通過兩種方法的對比研究,煙嘧磺隆的降解受pH的影響較大,在酸性條件下的降解效率高于中性、堿性條件。2)探討了煙嘧磺隆UV-電化學降解體系動力學方程,結果表明煙嘧磺隆在UV-電化學的降解過程符合一級動力學,相關系數良好。3)通過對煙嘧磺隆好氧活性污泥體系和UV-電化學體系下的降解產物進行LC-MS鑒定。推斷出煙嘧磺隆降解產物M1-M7,在好氧活性污泥和UV-電化學降解體系下得到的產物M1,M3,M4一致。根據煙嘧磺隆降解產物,初步探討了可能存在的降解途徑。
[Abstract]:With the rapid development of pesticide industry and modern agriculture, a wide variety of herbicides have been widely used. At the same time, the number and species of herbicides entering the environmental water are increasing, which will inevitably bring some pollution to the ecological environment. At the same time, it brings great risks to nature and human beings. In this paper, nicosulfuron was selected as the typical sulfonylurea pesticide herbicide as the target pollutant for degradation. The influencing factors and degradation rules of niosulfuron were studied by means of comparative experiment and single factor experiment. The optimum reaction conditions of the UV- electrochemical system were determined. The kinetics of the reaction was analyzed and the degradation pathway was deduced from the degradation products. The main contents are as follows: 1) the degradation process of niosulfuron simulated wastewater under advanced oxidation and biochemical system was studied. Electrochemical and photochemical UV- electrochemical systems were used to degrade niosulfuron by advanced oxidation. The degradation rates of each system were 63.8% and 45.8% respectively. The experimental results showed that the degradation of niosulfuron was removed by advanced oxidation method, but the removal efficiency was the best by UV- electrochemical system. In the biochemical system, the aerobic activated sludge process was used to degrade niosulfuron. The effects of temperature, reaction time and pH value of the system on the degradation were studied. The optimum degradation rate was 83.2%, and the biodegradability of nicosulfuron was verified. By comparing the two methods, the degradation of nicosulfuron was greatly affected by pH, and the degradation efficiency in acidic condition was higher than that in neutral condition, and the kinetic equation of the electrochemical degradation system of nicosulfuron UV- was studied under alkaline condition. The results showed that the degradation process of nicosulfuron in UV- was in accordance with the first order kinetics, and the correlation coefficient was good. 3) the degradation products of nicosulfuron aerobic activated sludge system and UV- electrochemical system were identified by LC-MS. It was inferred that the degradation product M1-M7 of nicosulfuron was consistent with that obtained from aerobic activated sludge and UV- electrochemical degradation system. According to the degradation products of nicosulfuron, the possible degradation pathway was preliminarily discussed.
【學位授予單位】：齊魯工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：X592

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