漂浮光催化网网系统对产毒微囊藻的光敏灭活：生理机制及应用研究

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-05-16 DOI:10.1016/j.watres.2025.123819

Guangqi An , Cheng Zhang , Yunxin Zhu , Hongjian Zhang , Naoki Kawazoe , Guoping Chen , Yingnan Yang

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引用次数: 0

摘要

有害藻华（HABs）释放水生毒素，造成严重的生态和健康风险。在这项研究中，开发了一种新型的基于bi2wo6的漂浮光催化网（BPM）系统，该系统在太阳光照射下通过灭活habs主导的微囊藻和解毒相关的微囊藻毒素（MCs）来实现高效的水净化。BPM系统的优异浮选性能、耐用性和阳光利用率分别由其超疏水表面、坚固的不锈钢网载体和高效的透光性实现。在5 × 106个细胞/mL的水华密度下，通过产生自由基和直接物理破坏细胞的双重机制，在6小时内实现光催化微囊藻的灭活和MCs的降解。此外，微囊藻的生理反应表现出一个时间依赖性的失活过程。在BPM系统中，光合和抗氧化系统、细胞膜完整性和MCs的生产/释放逐渐崩溃，最终MCs迅速解毒到安全水平。浮式BPM系统在165小时的水冲洗中保持了优异的稳定性和效率，证明了其优越的适用性。基于真实太阳辐射的BPM系统的整体可行性评估进一步证明了其减少赤潮面积的可扩展性。这项工作为在有害藻华管理中实现可持续水净化提供了机制见解和实践验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Solar-light-driven inactivation of toxigenic Microcystis by floating photocatalytic mesh system: Insights on physiological mechanism and application

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Solar-light-driven inactivation of toxigenic Microcystis by floating photocatalytic mesh system: Insights on physiological mechanism and application

Harmful algal blooms (HABs) pose serious ecological and health risks with releasing waterborne toxins. In this study, a novel floating Bi₂WO₆-based photocatalytic mesh (BPM) system was developed for efficient water purification by targeting the inactivation of HABs-dominated Microcystis and detoxification of associated microcystins (MCs) under solar light irradiation. The superior flotation, durability and sunlight utilization of the BPM system were achieved by its super-hydrophobic surface, robust stainless-steel mesh carrier, and efficient light transmission, respectively. Photocatalytic Microcystis inactivation and MCs degradation were achieved within 6 h at a bloom density of 5 × 10⁶ cells/mL through dual mechanisms, which are free radicals generation and direct physical cell disruption. Additionally, the physiological response in Microcystis exhibited a time-dependent inactivation process. The photosynthetic and antioxidant system, cell membrane integrity and MCs production/release progressively collapsed in the BPM system, finally the MCs rapidly detoxified to a safe level. The floating BPM system maintained excellent stability and efficiency over 165 h of water flushing, demonstrating its superior applicability. The global feasibility assessments of the BPM system based on real-world solar radiation further demonstrated its scalability for reducing HABs areas. This work provides both mechanistic insights and practical validation for sustainable water purification in HABs management.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.