本文選題：準(zhǔn)分子燈 + 光催化��； 參考：《江蘇理工學(xué)院》2016年碩士論文

【摘要】：采用準(zhǔn)分子紫外光解/光催化降解兩種體系對難降解有機(jī)污染物進(jìn)行降解。通過建立動(dòng)力學(xué)模型,計(jì)算光子效率定量評價(jià)了光催化反應(yīng)器的性能,考察了初始濃度、外加氧化性離子、外加氧化劑對去除效果的影響,研究了準(zhǔn)分子燈光催化降解有機(jī)物的反應(yīng)機(jī)制;探討了該體系降解實(shí)際印染和農(nóng)藥廢水的可行性。具體結(jié)果如下:(1)采用動(dòng)力學(xué)模型對苯酚的降解進(jìn)行擬合,表明光解和光催化體系中苯酚的降解均符合準(zhǔn)一級動(dòng)力學(xué)模型。計(jì)算體系的全額光子效率,定量評價(jià)體系的光催化性能。研究發(fā)現(xiàn),加入催化劑和提高初始c(苯酚)可以提高體系的光催化性能。輻射功率為0.76W、初始c(苯酚)為1.10 mmol/L、ρ(催化劑)為0.8 g/L的條件下,全額光子效率為5.56%。利用高效液相色譜測定了苯酚光催化降解生成的中間產(chǎn)物,其表現(xiàn)為c(對苯二酚)c(鄰苯二酚)c(對苯醌)c(間苯二酚);通過建立苯酚及中間產(chǎn)物的擬一級降解動(dòng)力學(xué)模型,證實(shí)苯酚光催化降解歷程為苯酚→芳香烴中間產(chǎn)物→最終產(chǎn)物。(2)四種準(zhǔn)分子光源(KrBr*、KrCl*、XeBr*和Hg)對鄰苯二甲酸二甲酯(DMP)光解的去除率按照KrBr*KrCl*Xe Br*Hg依次降低。采用KrBr*燈光解DMP,研究發(fā)現(xiàn),光解過程中產(chǎn)生了O3、O2-?、?OH、HO2?和H2O25種活性物質(zhì),貢獻(xiàn)率大小分別為:?OH(56.6%)O3(12.8%)O2-?/HO2?/H2O2(9.5%),UV直接光解貢獻(xiàn)率約占21.1%。(3)通過對比不同光源、外加氧化性物質(zhì)對DMP直接光解和光氧化降解的影響,證實(shí)污染物光解受制于兩個(gè)條件:直接光解取決于污染物自身能吸收光發(fā)生分解;間接光解取決于外加氧化劑能吸收紫外光產(chǎn)生活性基團(tuán)而非自身光解。(4)采用準(zhǔn)分子燈光催化降解實(shí)際廢水(印染、農(nóng)藥),探討了準(zhǔn)分子燈廢水深度治理的可行性。
[Abstract]:Excimer UV photolysis / photocatalytic degradation was used to degrade refractory organic pollutants. The kinetic model was established to quantitatively evaluate the performance of photocatalytic reactor by calculating photon efficiency. The effects of initial concentration, addition of oxidizing ions and oxidant on the removal efficiency were investigated. The mechanism of photocatalytic degradation of organic compounds by excimer light was studied, and the feasibility of degradation of actual printing and dyeing wastewater and pesticide wastewater by this system was discussed. The results are as follows: (1) the kinetic model is used to fit the degradation of phenol, which shows that the degradation of phenol in photocatalytic system is in accordance with the quasi-first-order kinetic model. The full photon efficiency of the system was calculated and the photocatalytic performance of the system was evaluated quantitatively. It was found that the photocatalytic activity of the system could be improved by adding catalyst and increasing the initial C (phenol). When the radiation power is 0.76 W, the initial c (phenol) is 1.10 mmol / L and 蟻 (catalyst) is 0.8 g / L, the full photon efficiency is 5.56. The intermediate products produced by photocatalytic degradation of phenol were determined by high performance liquid chromatography (HPLC), which were characterized as c (hydroquinone) (catechol) c (p-benzoquinone) (resorcinol), and the pseudo-first-order degradation kinetic model of phenol and its intermediate products was established. It is confirmed that the photocatalytic degradation process of phenol is the final product of phenol aromatics intermediate product. (2) the photolysis efficiency of dimethyl phthalate (DMP) by four excimer light sources, KrBrln, XeBr* and Hg2, is decreased according to KrBr*KrCl*Xe Br*Hg. Using KrBr* light to hydrolyze DMPs, it was found that O3O2-OHHHO2 was produced during photolysis. And the active substances of H2O25 species, the contribution rate is 56.6%, respectively, and the contribution rate is about 21.1% by comparing the direct photolysis contribution of different light sources and the addition of oxidizing substances on the direct photolysis and photooxidative degradation of DMP by comparing the direct photolysis of DMP with O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2 / H _ 2O _ 2, respectively. It is proved that the photolysis of pollutants is restricted by two conditions: direct photolysis depends on the ability of the pollutants to absorb light to decompose; Indirect photolysis depends on the addition of oxidant can absorb ultraviolet light to produce active group instead of self-photolysis. It uses excimer light to catalyze the degradation of actual wastewater (printing and dyeing, pesticide, etc.) the feasibility of deep treatment of excimer lamp wastewater is discussed.
【學(xué)位授予單位】：江蘇理工學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：X703

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