地下水地表水相互作用下的微囊藻毒素去除-资源与环境科学进展-CSCIED科技核心评价数据库-手机版

地下水地表水相互作用下的微囊藻毒素去除

Microcystin removal under groundwater–surface water interactions

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DOI	10.12208/j.aes.20250022
刊名	资源与环境科学进展 Advances in Resources and Environmental Science
年，卷(期)	2025, 4(3)
作者	Renee Richer¹, 陈雅柔¹, 储子仪¹, 顾传辉^1,2, 苏绎同¹,
作者单位	1 昆山杜克大学自然与应用科学部江苏昆山 2 昆山杜克大学环境研究中心江苏昆山
摘要	微囊藻毒素（MCs）是一类由蓝藻产生的高毒性化合物，对水域与陆域生态系统均构成风险。河岸缓冲带被广泛认为能削减陆源污染物，但其对河源微囊藻毒素的削减能力仍缺乏研究。本文结合现场监测、实验室土柱试验与微生物群落分析，评估在动态河-地下水交换条件下，河岸带对MCs的去除能力。位于长江口一条感潮河的现场数据揭示了河-地下水双向的交换与河水中的MC侵入河岸带。土柱实验显示，相比保守性氯离子，MC的质量回收率减少约90%，拟合得到的一阶降解速率常数为1.02–1.15 d⁻¹。微生物测序发现河岸土壤中富集了潜在的MC降解菌属（如 Sphingomonas 与 Novosphingomonas）。结果显示河岸带是被忽视的河源MC生物地球化学过滤器。理解MC在河岸体系中的归趋可为流域层面的蓝藻毒素治理提供基于自然的解决方案。
Abstract	Microcystins (MCs) are highly toxic cyanobacterial metabolites that pose risks to both aquatic and terrestrial ecosystems. Riparian buffers are widely recognized for attenuating land-derived pollutants, yet their capacity to reduce river-borne microcystins remains underexplored. Integrating field monitoring, laboratory soil-column experiments, and microbial community analyses, we evaluated MC removal in riparian zones under dynamic river–groundwater exchange. Field data from a tidal river near the Yangtze River Estuary reveal bidirectional river–groundwater exchange and intrusion of riverine MC into the riparian corridor. Column experiments showed that, relative to conservative chloride, MC mass recovery decreased by ~90%, with fitted first-order decay rate constants of 1.02–1.15 d⁻¹. Amplicon sequencing indicated enrichment of putative MC-degrading taxa in riparian soils (e.g., Sphingomonas, Novosphingomonas). These results identify riparian zones as an overlooked biogeochemical filter for river-borne MC. Understanding MC fate within riparian systems can inform nature-based solutions for watershed-scale cyanotoxin management.
关键词	微囊藻毒素；地下水地表水相互作用；河岸带；生物降解
KeyWord	Microcystins; Groundwater–surface water interactions; Riparian zone; Biodegradation
基金项目
页码	10-18

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引用本文

Renee Richer, 陈雅柔, 储子仪, 顾传辉^,, 苏绎同. 地下水地表水相互作用下的微囊藻毒素去除 [J]. 资源与环境科学进展. 2025; 4; (3). 10 - 18.

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