【摘要】：甲硫醇鈉是一種的有機(jī)中間體,能夠合成多種重要物質(zhì),在市場中的需求逐漸增加。甲硫醇鈉有許多合成方式有,但是采取最多的生產(chǎn)工藝是用硫氫化鈉(NaHS)和硫酸二甲酯(C2H6O4S)為原料,發(fā)生反應(yīng)生成甲硫醇(CH4S),再甲硫醇被堿液吸收制成甲硫醇鈉(CH3NaS)。目前在甲硫醇鈉的生產(chǎn)過程中,由于企業(yè)生產(chǎn)管理或者治理方法的限制,導(dǎo)致企業(yè)周邊水和大氣環(huán)境受到污染。2016年6月山東省某企業(yè)違規(guī)生產(chǎn)甲硫醇鈉,在沒有任何處理設(shè)施的情況下違規(guī)生產(chǎn),惡臭氣味逸散,導(dǎo)致周邊環(huán)境極其惡劣。因此針對此類特種廢水,研制經(jīng)濟(jì)、有效治理甲硫醇鈉生產(chǎn)廢水的技術(shù)不僅能夠使甲硫醇鈉產(chǎn)量滿足市場發(fā)展,而且能夠解決甲硫醇鈉廢水污染問題,這具有很大的經(jīng)濟(jì)價值和實際意義。本論文的主要包括以下內(nèi)容:(1)甲硫醇鈉生產(chǎn)廢水主要成分的分析研究;(2)不同氧化劑對甲硫醇鈉廢水去除COD效果的對比研究;(3)芬頓試劑對甲硫醇鈉廢水實驗條件的優(yōu)化;(4)初步探究電化學(xué)氧化技術(shù)掃描速率對模擬甲硫醇鈉廢水氧化還原電位的影響。采用亞甲基藍(lán)分光光度法(GB/T16489-1996)對甲硫醇鈉廢水硫含量進(jìn)行分析,知該廢水水樣中硫化物的含量為5mg/L;在堿性條件下,甲硫醇與碘發(fā)生氧化還原反應(yīng)生產(chǎn)雙硫醚,在通過碘量法測得廢水水樣中甲硫醇鈉的含量為75.6g/L;采用重量法(HJ/T51-1999)測量溶液全鹽量,廢水水樣經(jīng)處理后處理液的鹽含量為77g/L;通過對比四種不同氧化劑對該水樣的COD去除效果,知芬頓試劑對甲硫醇鈉廢水水樣的處理效果十分顯著,該甲硫醇鈉廢水COD去除率能夠達(dá)到99%,且COD值為202mg/L,滿足排入城鎮(zhèn)污水下水道二級標(biāo)準(zhǔn),并且從最后處理液中能夠回收芒硝。通過模擬甲硫醇鈉水樣所做的電化學(xué)進(jìn)行初步探究,得知其氧化還原電位隨掃描速率的增大而增大,但濃度的大小并不影響其氧化還原電位。
[Abstract]:Sodium methylmercaptate is an organic intermediate, which can synthesize many important substances, and the demand in the market is increasing gradually. Sodium methylmercaptate is synthesized in many ways, but the most widely used production process is to use sodium sulphide (NaHS) and dimethyl sulfate (C2H6O4S) as raw materials to produce methyl mercaptan (CH4S), and then methyl mercaptan is absorbed by alkali to form sodium methionol (CH3NaS). At present, in the production process of sodium methionol, the water and atmospheric environment around the enterprise is polluted due to the restriction of the production management or management methods of the enterprise. In June 2016, a certain enterprise in Shandong Province illegally produced sodium methionol. In the absence of any processing facilities, illegal production, odor emission, resulting in an extremely harsh surrounding environment. Therefore, for this kind of special wastewater, the technology of developing economical and effective treatment of sodium methionol production wastewater can not only make the production of sodium methionol meet the market development, but also solve the pollution problem of sodium methionol wastewater. This has great economic value and practical significance. The main contents of this thesis are as follows: (1) the analysis of the main components of sodium methionol wastewater; (2) the comparative study on the removal of COD from sodium methionol wastewater by different oxidants; (3) the experimental conditions of Fenton reagent for sodium methionol wastewater. (4) the effect of scanning rate of electrochemical oxidation technology on the redox potential of simulated sodium methionol wastewater was investigated. The sulfur content of sodium methionol wastewater was analyzed by methylene blue spectrophotometry (GB/T16489-1996), and the sulfides content in the wastewater was found to be 5 mg / L. In alkaline condition, methionol redox with iodine to produce disulfide. The content of sodium methylmercaptate in wastewater was 75.6 g / L by iodine method, the total salt content of solution was measured by gravimetric method (HJ/T51-1999), the salt content of treated solution was 77 g / L, and the COD removal efficiency of the water sample was compared with four different oxidants. The COD removal rate of sodium methionol wastewater can reach 99mg / L, and the COD value is 20mg / L, which meets the secondary standard of sewage discharge into urban sewage, and can recover mirabilite from the final treatment solution. By simulating the electrochemical properties of sodium methionol in water, it is found that the redox potential increases with the increase of the scanning rate, but the concentration does not affect the redox potential.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X783

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