發(fā)布時(shí)間：2018-03-17 14:34

  本文選題：環(huán)境　切入點(diǎn)：富里酸　出處：《環(huán)境科學(xué)研究》2017年03期 　論文類型：期刊論文

【摘要】：為了解高濃度富里酸在臭氧體系中的降解特性,采用了高效且反應(yīng)條件溫和的臭氧法處理高濃度富里酸模擬廢水,并采用紫外-可見吸收光譜和三維熒光光譜,研究了臭氧降解高濃度富里酸的特性與原理.結(jié)果表明:在初始pH為8.0、臭氧投加量(以ρ計(jì))為65.00 mg/L的條件下,反應(yīng)30 min后色度、富里酸、COD_(Cr)的去除率分別為82.16%、43.28%、26.73%;臭氧利用率從反應(yīng)2 min時(shí)的72.52%降至30 min時(shí)的18.15%,B/C[ρ(BOD_5)/ρ(COD_(Cr)]由進(jìn)水的0.27升至0.61,ρ(HCO_3~-)由初始的42.2 mg/L增至502.6 mg/L,說明小分子有機(jī)物的不斷生成和礦化使得模擬廢水可生化性大幅提高.紫外-可見吸收光譜分析表明,臭氧能使富里酸模擬廢水中易降解物質(zhì)成分增多、富里酸的結(jié)構(gòu)趨于簡單.三維熒光光譜表明,臭氧能有效降解大分子富里酸類物質(zhì),并較快速地使小分子色氨酸被氧化,隨著反應(yīng)的持續(xù)進(jìn)行,富里酸的腐殖化程度逐漸降低.
[Abstract]:In order to understand the degradation characteristics of high concentration fulvic acid in ozone system, a high efficient and mild ozone method was used to treat the simulated wastewater of high concentration fulvic acid. UV-Vis absorption spectra and three dimensional fluorescence spectra were used. The characteristics and principle of ozone degradation of high concentration fulvic acid were studied. The results showed that under the conditions of initial pH 8.0 and ozone dosage 65.00 mg/L, the chroma of the reaction was 30 min later. The removal rates were 82.160.28 and 26.73, respectively. The ozone utilization ratio decreased from 72.52% in reaction 2 min to 18.15B / C at 30 min [蟻 Bod _ 5N / 蟻 _ C _ D _ C] from 0.27 in influent to 0.61and 蟻 HCO3-) from 42.2 mg/L to 502.6 mg / L, indicating that the continuous formation and mineralization of small molecule organic matter makes simulation simulation. The biodegradability of wastewater was greatly improved. Ozone can increase the content of easily degradable substances and simplify the structure of fulvic acid in simulated wastewater. Three-dimensional fluorescence spectra show that ozone can effectively degrade macromolecular fulvic acid and oxidize small molecule tryptophan quickly. As the reaction continued, the humification degree of fulvic acid decreased gradually.
【作者單位】： 四川師范大學(xué)化學(xué)與材料科學(xué)學(xué)院;農(nóng)業(yè)部農(nóng)村可再生能源開發(fā)利用重點(diǎn)實(shí)驗(yàn)室;西南交通大學(xué)地球科學(xué)與環(huán)境工程學(xué)院;農(nóng)業(yè)部沼氣科學(xué)研究所;
【基金】：四川省教育廳項(xiàng)目(15ZB0034) 四川省科技廳苗子工程項(xiàng)目(2015039)
【分類號(hào)】：X703.1

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本文編號(hào)：1625174