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Enhancing carbon sequestration through flocculation of harmful algal blooms by modified clay technology

文献类型：期刊论文

作者Chi, Lianbao1,2,3; Chen, Jing1,3; Zheng, Tianhao1,3; Wang, Wentao1,2,3; Song, Xiuxian1,2,3; Yu, Zhiming1,2,3
刊名WATER RESEARCH X
出版日期2026
卷号30页码:10
关键词Harmful algal blooms Alga-derived organic carbon Mineralization Modified clay Mineral-enhanced carbon sequestration
DOI10.1016/j.wroa.2026.100493
通讯作者Song, Xiuxian(songxx@qdio.ac.cn) ; Yu, Zhiming(zyu@qdio.ac.cn)
英文摘要Global efforts to mitigate climate change emphasize the critical need to enhance carbon sinks. Harmful algal blooms (HABs) areas represent hot spots for labile organic carbon production, yet their carbon sequestration capacity is diminished by rapid microbial mineralization. Modified clay (MC) technology, used for HABs mitigation, could enhance the sedimentation and influence the transformation dynamics of algal-derived organic carbon. Nevertheless, the impacts of MC on the mineralization of algal-derived organic carbon and the mechanisms involved remain inadequately understood. In this study, employing 13C-labeled batch incubation experiments, we demonstrated that algal-derived organic carbon undergoes rapid mineralization, with 46%-59% of the total organic carbon (TOC) being mineralized within 30 days. MC substantially reduced the mineralization rate of algal-derived organic carbon from 0.68-0.80 mg/(L center dot d) to 0.09 mg/(L center dot d), thereby boosting organic carbon sequestration potential by approximately 55-70% compared to the control group. Multiple lines of evidence, including microscopic imaging, fluorescence spectroscopy, and microbial analysis, revealed that MC promoted organic carbon downward export, reduced bioavailability through flocculation and encapsulation, and suppressed heterotrophic bacteria. Notably, the MC treatment group exhibited a significant reduction, with the abundance of heterotrophic bacteria decreasing by approximately 60% and the functional genes associated with microbial mineralization dropping by 50%. Overall, this study presents direct evidence and mechanistic insights that demonstrate the feasibility of employing MC to enhance carbon sequestration in mitigating HABs.
WOS关键词DISSOLVED ORGANIC-MATTER ; MARINE-SEDIMENTS ; DEGRADATION ; DIATOM ; MECHANISMS ; MICROALGAE ; NUTRIENTS
资助项目National Natural Science Foundation of China[42376210] ; National Natural Science Foundation of China[42276220] ; Intergovernmental Innovation Cooperation Project of the Ministry of Science and Technology[2022YFE0136400]
WOS研究方向Engineering ; Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:001677392000001
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/204643]  
专题海洋研究所_海洋生态与环境科学重点实验室
通讯作者Song, Xiuxian; Yu, Zhiming
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266200, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Chi, Lianbao,Chen, Jing,Zheng, Tianhao,et al. Enhancing carbon sequestration through flocculation of harmful algal blooms by modified clay technology[J]. WATER RESEARCH X,2026,30:10.
APA Chi, Lianbao,Chen, Jing,Zheng, Tianhao,Wang, Wentao,Song, Xiuxian,&Yu, Zhiming.(2026).Enhancing carbon sequestration through flocculation of harmful algal blooms by modified clay technology.WATER RESEARCH X,30,10.
MLA Chi, Lianbao,et al."Enhancing carbon sequestration through flocculation of harmful algal blooms by modified clay technology".WATER RESEARCH X 30(2026):10.

入库方式： OAI收割

来源：海洋研究所

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