Exploration of the primary features of algal organic matter that impede the efficiency of harmful algal bloom control by modified clay

Yafan WANG; Xihua CAO; Kaiqin JIANG; Na CHU; Xiaomiao ZANG; Tianrong ZHAN; Xiuxian SONG; Zhiming YU

doi:10.1007/s00343-025-5102-4

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Exploration of the primary features of algal organic matter that impede the efficiency of harmful algal bloom control by modified clay

Ecology | Updated：2026-05-07

- Exploration of the primary features of algal organic matter that impede the efficiency of harmful algal bloom control by modified clay
- Journal of Oceanology and Limnology Vol. 44, Issue 2, Pages: 650-661(2026)
- Affiliations：
  
  1.College of Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  2.CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  3.University of Chinese Academy of Sciences, Beijing 100049, China
  4.Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China
  5.College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Author bio：
  
  caoxh@qdio.ac.cn
  trzhan@qust.edu.cn
- Funds：
- DOI：10.1007/s00343-025-5102-4
  CLC：
- Received：02 April 2025，
  
  Accepted：28 April 2025，
  
  Online First：16 May 2025，
  
  Published：01 March 2026
- Accepted：
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WANG Yafan,CAO Xihua,JIANG Kaiqin,et al.Exploration of the primary features of algal organic matter that impede the efficiency of harmful algal bloom control by modified clay[J].Journal of Oceanology and Limnology,2026,44(02):650-661.
DOI：

WANG Yafan,CAO Xihua,JIANG Kaiqin,et al.Exploration of the primary features of algal organic matter that impede the efficiency of harmful algal bloom control by modified clay[J].Journal of Oceanology and Limnology,2026,44(02):650-661. DOI： 10.1007/s00343-025-5102-4.

摘要

Abstract

In recent studies

the most effective method for controlling harmful algal blooms (HABs) in field applications is the modified clay (MC) technology. While the MC technology has been proved highly effective for HABs control

emerging evidence highlights its limitations

particularly in the presence of algal organic matter (AOM) where the algal removal efficiency of MC can be significantly reduced. We compared the physicochemical properties of AOM derived from two dinoflagellate species

Prorocentrum

donghaiense

(also identified as

Prorocentrum

shikokuense

Hada and

Prorocentrum

obtusidens

Schiller) and

Amphidinium

carterae

and their effects on the MC flocculation of microalgae cells. The physicochemical properties of AOM in microalgal culture fluid can differ with species and growth phase. Various AOM samples had different effects on MC flocculation; for example

AOM derived from

donghaiense

in the exponential growth phase inhibited flocculation

while AOM derived from

carterae

in the exponential growth and stationary phases accelerated flocculation. The effect of AOM on MC flocculation was attributed to a combination of multiple mechanisms

with individual AOM properties displaying inconsistent effects under different sets of conditions. Notably

the ratio of the molecular weight to the electric charge (

) of the AOM can indicate how the AOM will affect the algae removal efficiency of MC: the larger the ratio is

the greater the promoting effect is likely to be

and vice versa.

关键词

Keywords

references

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