高浓度富里酸在臭氧体系中的降解特性

发布时间：2018-03-17 14:34

本文选题：环境　切入点：富里酸　出处：《环境科学研究》2017年03期 　论文类型：期刊论文

【摘要】：为了解高浓度富里酸在臭氧体系中的降解特性,采用了高效且反应条件温和的臭氧法处理高浓度富里酸模拟废水,并采用紫外-可见吸收光谱和三维荧光光谱,研究了臭氧降解高浓度富里酸的特性与原理.结果表明:在初始pH为8.0、臭氧投加量(以ρ计)为65.00 mg/L的条件下,反应30 min后色度、富里酸、COD_(Cr)的去除率分别为82.16%、43.28%、26.73%;臭氧利用率从反应2 min时的72.52%降至30 min时的18.15%,B/C[ρ(BOD_5)/ρ(COD_(Cr)]由进水的0.27升至0.61,ρ(HCO_3~-)由初始的42.2 mg/L增至502.6 mg/L,说明小分子有机物的不断生成和矿化使得模拟废水可生化性大幅提高.紫外-可见吸收光谱分析表明,臭氧能使富里酸模拟废水中易降解物质成分增多、富里酸的结构趋于简单.三维荧光光谱表明,臭氧能有效降解大分子富里酸类物质,并较快速地使小分子色氨酸被氧化,随着反应的持续进行,富里酸的腐殖化程度逐渐降低.
[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.
【作者单位】：四川师范大学化学与材料科学学院;农业部农村可再生能源开发利用重点实验室;西南交通大学地球科学与环境工程学院;农业部沼气科学研究所;
【基金】：四川省教育厅项目(15ZB0034) 四川省科技厅苗子工程项目(2015039)
【分类号】：X703.1

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