外文文獻(xiàn)及翻譯---在由臭氧攪拌反應(yīng)器中有機(jī)污染物的破壞模型-全文預(yù)覽
【正文】 味著臭氧反應(yīng)沒(méi)有在液膜內(nèi)完成，并可能延伸到液態(tài)散裝。 圖 1,在 2， 42DCP 解決方案中對(duì)增強(qiáng)因子和臭氧吸收的預(yù)測(cè) (攪拌轉(zhuǎn)速 : 200 r/min , cA , G,0 = 0. 0002 mol/L , cB ,L ,0 = 0. 0005 mol/L , a = 2 , Sr = 0. 24) Curve No. Key * pH q , L/min k1,L/(mol該攪拌器是一個(gè) 6刀片的渦輪葉輪。 對(duì)于單一 DCP溶液中的臭氧吸收，通過(guò)結(jié)合等式（ 1），（ 2）和（ 3）以及應(yīng)用MATLAB ODE程序的數(shù)字化方法，增強(qiáng)因子 E，在大多數(shù)氣相和液相臭氧中 DCP的濃度， cB ,L , cA , G 能夠從理論上預(yù)知，如圖 1和 2所示。 2模擬和實(shí)驗(yàn)結(jié)果 在 DCP的同分異構(gòu)體中， 2， 42DCP和 2， 62DCP同分異構(gòu)體 被選作為分別與臭氧反應(yīng)用量最少且活性最大的用于模擬的模型化合物。 值得注意的是， Eq。 那里 ,L 是指申請(qǐng)審驗(yàn)及認(rèn)證的有機(jī)化合物的濃度的液體散貨 ,B,是計(jì)量比臭氧氧化反應(yīng)。分別是速度的氣相及氣率 ,t 是吸收時(shí)間。因?yàn)閷?dǎo)出來(lái)的增強(qiáng)因數(shù)是一個(gè)隱含的表達(dá)式，它在臭氧氧化反應(yīng)器模擬有機(jī)污染物的降解率的應(yīng)用方面不方便。眾所周知吸收了大量氣體的溶質(zhì)的轉(zhuǎn)化速率在化學(xué)反應(yīng)中被加強(qiáng)。相比于傳統(tǒng)的處理技術(shù)，這樣的活性碳吸附或者生物降解，臭氧化學(xué)氧化有著更快的速度和更廣的污染物破壞面積的優(yōu)勢(shì)。一個(gè)對(duì)我們之前工作中的增強(qiáng)因數(shù)的簡(jiǎn)單的表述被應(yīng)用在估計(jì)在臭氧吸收中化學(xué)團(tuán)轉(zhuǎn)化率。s) kd , s 1 kL a , s 1 kL 104mPs εG 1 ■ 5 1 106 0. 01134 3. 8 0. 01 2 ● 7 1 1. 1 108 0. 01134 3. 8 0. 01 3 + 9 1 7. 5 108 0. 01134 3. 8 0. 01 4 ▲ 7 1. 1 108 0. 013 * experimental Fig. 2 Prediction of enhancement factor and concentration of ozone absorption in 2 ,62DCP solution (Stir speed : 200 r/min , cA , G,0 = 0. 0002 mol/L , cB ,L ,0 = 0. 0005 mol/L , a = 2 , Sr = 0. 24) Curve No. Key * pH q , L/min k1, L/(mol stirred2tank reactor 。 ozonation 。 Qiu , 1999) , i. e. cA ,L ≈0 , all the fast ozonation reactions can be assumed to plete within the liquid film. Then the depletion rate of the organic ponent in the liquid phase can be written as (Sotelo , 1990) : where cB ,L refers to the concentration of organic pound B in the liquid bulk , and a is the stoichiometric ratio of the ozonation reaction. In the above two equations the interfacial concentration of ozone cA , i can be expressed as cA , i = cA , G Sr. The solubility ratio of ozone Sr is 0. 21 — 0. 28 in the pH range of 5 — 9 (Qiu , 1999) and an average value 0. 24 is adopted here. A simple explicit expression of the enhancement factor in ozone absorption with ozone self2deposition and a second order ozonation reaction was derived in our previous work (Cheng , 2020) based on the surface renewal model as where DA and DB are the diffusivity of ozone and organic B respectively. k is the second order reaction constant , kd is the first order ozone self2deposition reaction constant. It should be noted that Eq. (2) is valid only if the following condition holds M = Md + M1 [1 ( E 1) /Q] 4. 1. 2 Destruction of the mixture of organic pollutants in aqueous solution by ozonation When two or more contaminants are present initially in the liquid , the absorption of ozone is acpanied by parallel ozonation reactions. If the petition between these reactions is considered to be dependent only on the reaction constants ,the depletion rate of organic ponent Bj in the liquid phase can be derived as The mass balance for ozone A in the gas phase is the same as Eq. (1) . For the enhancement f
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