臭氧(o3)和真空紫外(VUV)去除微囊藻毒素:氯离子的影响

IF 2.1 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Fatima AlAfifi, Saad Jasim, Madjid Mohseni
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引用次数: 0

摘要

摘要在氯离子作为主要溶质存在的条件下,研究了臭氧(O3)、真空紫外(VUV)及其组合对水中微囊藻毒素lr (MC-LR)的去除效果。总的来说,VUV/O3联合工艺对MC-LR的去除效果最好,氯离子的存在增强了去除效果。氯自由基的形成是观察到的改善的主要原因。在300 mJ cm−2左右的紫外辐照、0.1 mg L−1的臭氧剂量和120 mg L−1的氯离子浓度条件下,不同工艺对MC-LR的去除率依次为:VUV/O3/ chloride > VUV/O3 > VUV/ chloride > VUV > O3。对比添加了Suwannee河NOM的合成实验室样品和相同有机浓度的天然水样中O3、VUV和VUV/O3对MC-LR的去除效果,发现背景有机物在清除过程中对臭氧的作用。在一定的臭氧剂量下,天然水中O3或VUV/O3对MC-LR的去除率低于合成水样。独立的VUV不受影响,MC-LR在合成水和天然水中的去除是相同的。关键词:高级氧化氯化强化微囊藻毒素lr降解臭氧苏旺尼河nomo真空紫外线致谢本研究由卡塔尔国家研究基金(QNRF)资助,实验在不列颠哥伦比亚大学化学与生物工程系实验室进行。非常感谢大温哥华地区的Kevin Brown先生提供Capilano Watershed的水样。披露声明作者未报告潜在的利益冲突。这项工作得到了卡塔尔国家研究基金的支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microcystin-LR Removal by Ozone (O 3 ) and Vacuum-UV (VUV): The Effect of Chloride Ions
ABSTRACTRemoval of microcystin-LR (MC-LR) by ozone (O3), vacuum-UV (VUV), and their combination was investigated in the presence of chloride as one of the main solutes present in water. In general, the combined VUV/O3 process provided the greatest MC-LR removal, with the presence of chloride enhancing the removal efficacy. Formation of chlorine radical species was the primary reason for the observed improvement. The order of MC-LR removal by different processes using UV fluence of around 300 mJ cm−2, ozone dose of 0.1 mg L−1, and chloride concentration of 120 mg L−1 was as follows: VUV/O3/Chloride > VUV/O3 > VUV/Chloride > VUV > O3. Comparing MC-LR removal by O3, VUV and VUV/O3 in synthetic lab samples, spiked with Suwannee River NOM and natural water samples of the same organic concentration, showed the significance of background organics in scavenging ozone in the process. For a given ozone dosage, MC-LR removal by O3 or VUV/O3 in natural water was lower than that in the synthetic water samples. The standalone VUV was not affected and the MC-LR removals were identical in both synthetic and natural waters.KEYWORDS: Advanced oxidationchloride enhancementmicrocystin-LR degradationOzoneSuwannee River NOMvacuum ultraviolet AcknowledgmentsThis study was funded by Qatar National Research Fund (QNRF) while the experiments were conducted in the laboratories of the Chemical and Biological Engineering Department at the University of British Columbia. Many thanks to Mr. Kevin Brown from Metro Vancouver for providing water samples from Capilano Watershed.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThe work was supported by the Qatar National Research Fund.
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来源期刊
Ozone: Science & Engineering
Ozone: Science & Engineering 环境科学-工程:环境
CiteScore
5.90
自引率
11.10%
发文量
40
审稿时长
2 months
期刊介绍: The only journal in the world that focuses on the technologies of ozone and related oxidation technologies, Ozone: Science and Engineering brings you quality original research, review papers, research notes, and case histories in each issue. Get the most up-to date results of basic, applied, and engineered research including: -Ozone generation and contacting- Treatment of drinking water- Analysis of ozone in gases and liquids- Treatment of wastewater and hazardous waste- Advanced oxidation processes- Treatment of emerging contaminants- Agri-Food applications- Process control of ozone systems- New applications for ozone (e.g. laundry applications, semiconductor applications)- Chemical synthesis. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees.
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