预氯化对铜绿微囊藻细胞完整性及微囊藻毒素去除的影响

IF 1.6 3区环境科学与生态学 Q3 WATER RESOURCES

Urban Water Journal Pub Date : 2023-05-30 DOI:10.1080/1573062X.2023.2218347

Alexander Ossanes de Souza, Kazumi Kinoshita Teramoto, Paloma Nathane Nunes de Freitas, Éryka Costa de Almeida, Sidney Seckler Ferreira Filho, E. Pinto

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引用次数: 1

摘要

高营养输入水体增加潜在的有毒蓝藻华。预氯化处理是极好的蓝藻细胞灭活和溶解的蓝藻毒素去除在供水来源。本研究旨在评价预氯化处理对铜绿微囊藻细胞完整性及其肝毒素(微囊藻毒素、MC)释放和降解的影响。随着氯浓度的增加，观察到细胞完整性的丧失。在2.5 mg Cl2 L−1时，细胞通透性达到最大值而不发生细胞解体。暴露60分钟后，观察到降解高达70%，叶绿素-a减少超过70%，在2.5和3 mg Cl2 L−1下完全降解。然而，微囊藻毒素MC-LR(即自由基:亮氨酸(L)和精氨酸(R))和MC-RR(即自由基:精氨酸和精氨酸)的氧化需要超过40.66 mg min L−1的氯(Cl2)暴露至低于饮用水立法值的浓度。

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Effect of pre-chlorination on Microcystis aeruginosa cell integrity and microcystins removal

ABSTRACT High nutrient input into waterbodies increases potentially toxic cyanobacteria blooms. Pre-chlorination treatment is excellent for cyanobacterial cell inactivation and dissolved cyanotoxins removal in water supply sources. This study aims to evaluate the pre-chlorination effect treatment on Microcystis aeruginosa cell integrity and its hepatotoxins (microcystins, MC) release and degradation on a laboratory scale. Loss of cell integrity is observed with increasing chlorine concentration. The maximum cell permeability without cell disintegration occurs at 2.5 mg Cl2 L−1. Degradations up to 70% and chlorophyll-a reductions over 70% are observed after 60 min exposure, with complete degradation at 2.5 and 3 mg Cl2 L−1. However, chlorine (Cl2) exposure over 40.66 mg min L−1 is required for microcystins MC-LR (i.e. radicals: leucine (L) and arginine (R)) and MC-RR (i.e. radicals: arginine and arginine) oxidation oxidation to concentrations below the legislation value for water potability.

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来源期刊

Urban Water Journal WATER RESOURCES-

CiteScore

4.40

自引率

11.10%

发文量

101

审稿时长

3 months

期刊介绍： Urban Water Journal provides a forum for the research and professional communities dealing with water systems in the urban environment, directly contributing to the furtherance of sustainable development. Particular emphasis is placed on the analysis of interrelationships and interactions between the individual water systems, urban water bodies and the wider environment. The Journal encourages the adoption of an integrated approach, and system''s thinking to solve the numerous problems associated with sustainable urban water management. Urban Water Journal focuses on the water-related infrastructure in the city: namely potable water supply, treatment and distribution; wastewater collection, treatment and management, and environmental return; storm drainage and urban flood management. Specific topics of interest include: network design, optimisation, management, operation and rehabilitation; novel treatment processes for water and wastewater, resource recovery, treatment plant design and optimisation as well as treatment plants as part of the integrated urban water system; demand management and water efficiency, water recycling and source control; stormwater management, urban flood risk quantification and management; monitoring, utilisation and management of urban water bodies including groundwater; water-sensitive planning and design (including analysis of interactions of the urban water cycle with city planning and green infrastructure); resilience of the urban water system, long term scenarios to manage uncertainty, system stress testing; data needs, smart metering and sensors, advanced data analytics for knowledge discovery, quantification and management of uncertainty, smart technologies for urban water systems; decision-support and informatic tools;...