高藻水臭氧预氧化过程有机物转化及消毒副产物生成势

发布时间：2018-01-04 18:13

本文关键词：高藻水臭氧预氧化过程有机物转化及消毒副产物生成势　出处：《环境科学》2017年03期 　论文类型：期刊论文

【摘要】：研究了高藻水预氧化处理过程中,不同臭氧氧化程度及不同pH值条件下,藻类有机物释放与转化规律以及氯化消毒副产物(DBPs)的生成特性.结果表明,臭氧投加量为28.92 mg·L-1时藻去除率达36%.随着臭氧投加量的增加,藻的去除率进一步增加,类腐殖酸先增加后持续减少,溶解性微生物代谢产物、类富里酸和类芳香蛋白物质持续减少;低投加量的臭氧对二氯乙腈(DCAN)、三氯乙腈(TCAN)生成势有明显的控制作用,但会增加三氯硝基甲烷(TCNM)以及1,1,1-三氯丙酮(1,1,1-TCP)前体物,随臭氧投加量增大,DBPs生成势显著增大.酸性条件下臭氧对藻的去除效果最好,UV254以及总有机碳(DOC)均随pH的增大有所上升,但变化较小;臭氧氧化可降解溶解性微生物代谢产物,降解效果受pH影响较小,类腐殖酸有机物随pH值增大而减少;DCAN、TCAN生成势随pH增大有所降低,TCNM生成势在pH=10条件下最高,1,1,1-TCP生成势在pH=7条件下最高.
[Abstract]:In the process of pre-oxidation of high algal water, different ozone oxidation degree and different pH value were studied. The release and transformation of organic matter from algae and the formation characteristics of chlorinated disinfection by-product (DBPs). When the ozone dosage was 28.92 mg 路L ~ (-1), the removal rate of algae reached 36. With the increase of ozone dosage, the removal rate of algae increased further, and humic acid increased first and then decreased. Soluble microbial metabolites, fulvic acid and aromatic protein-like substances continued to decrease; The low dosage of ozone could significantly control the formation potential of dichloroacetonitrile (DCAN) and trichloroacetonitrile (TCAN), but increase the TCNM (TCNM) and TCNM (1 / 1) of dichloroacetonitrile (trichloroacetonitrile). The formation potential of 1-trichloroacetone (1-TCP-1-TCP) was significantly increased with the increase of ozone dosage. The removal effect of ozone on algae was the best under acidic conditions. UV254 and total organic carbon (TOC) increased with the increase of pH, but the change was small. Ozone oxidation can degrade soluble microbial metabolites, the degradation effect is less affected by pH, and humic acid-like organic compounds decrease with the increase of pH value. The formation potential of Tcan decreases with the increase of pH value. The formation potential of TCNM is the highest under the condition of pH=10 under the condition of pH=10. The formation potential of Tcan is the highest under the condition of pH=7.
【作者单位】：重庆大学城市建设与环境工程学院三峡库区生态环境教育部重点实验室;中国建筑西南设计研究院有限公司山东分院;
【基金】：国家自然科学基金青年基金项目(51208531)
【分类号】：X52;TU991.2
【正文快照】： 藻类污染引起的水体富营养化已成为当前主要的水污染问题之一,在世界范围的水体中广泛存在[1,2],并且不断发生藻类过度繁殖的蓝藻水华现象.藻类有机物很难通过传统水处理工艺去除[3,4],在微污染原水处理过程中,常采用预氧化处理强化水中有机物或藻类物质的去除[5,6],以保障饮

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