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Environmental effects of modified clay flocculation on Alexandrium tamarense and paralytic shellfish poisoning toxins (PSTs)
Lu, Guangyuan1,2,3; Song, Xiuxian1; Yu, Zhiming1; Cao, Xihua1; Yuan, Yongquan1
2015-05-01
Source PublicationCHEMOSPHERE
Volume127Pages:188-194
SubtypeArticle
AbstractAmong various mitigation strategies for harmful algal blooms (HABs), the flocculation of algal cells by using modified clay (MC) has been widely applied in the field, particularly in Japan, Korea and China. However, to examine the long-term effects and the environmental safety of this method, we investigated alterations in macronutrients and paralytic shellfish poisoning toxins (PSTs) induced by the application of MC treatment to a toxic bloom, Alexandrium tamarense. The control, algal cells grew in nature condition (Al), was compared to the only MC flocculation (A2) and the MC-sediment co-matrix systems of A. tamarense (A3). The low-dosage of 0.25 g L-1 MC could efficiently remove >90% of the A. tamarense cells within 3.5h. The mechanisms underlying the effects elicited by MC flocculation on nutrient cycling, PSTs and Chl-a degradation were also discussed. This study demonstrated that MC treatment was able to significantly remove the macronutrients (43-60% TP removal and 17-30% TN removal) and scavenge most of the PSTs from seawater, thereby speeding up the nutrient settling and the transformation and degradation of PSTs (83% decreasing in A2). Simultaneously, the study firstly demonstrated the potential detoxification of PSTs by using MC treatment, from the high toxicity of gonyautoxin 1 and 4 (GTX1 and GTX4) to the lower toxicity decarbamoyl gonyautoxins (dcGTX3) and gonyautoxin 2 (GTX2), particularly within the water-sediment environment during the two month incubation. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordModified Clay Habs Mitigation Paralytic Shellfish Poisoning Toxin (Psts) Alexandrium Tamarense Environmental Effect
DOI10.1016/j.chemosphere.2015.01.039
Indexed BySCI
Language英语
WOS IDWOS:000352659900025
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/25455
Collection海洋生态与环境科学重点实验室
Affiliation1.Chinese Acad Sci, IOCAS, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lu, Guangyuan,Song, Xiuxian,Yu, Zhiming,et al. Environmental effects of modified clay flocculation on Alexandrium tamarense and paralytic shellfish poisoning toxins (PSTs)[J]. CHEMOSPHERE,2015,127:188-194.
APA Lu, Guangyuan,Song, Xiuxian,Yu, Zhiming,Cao, Xihua,&Yuan, Yongquan.(2015).Environmental effects of modified clay flocculation on Alexandrium tamarense and paralytic shellfish poisoning toxins (PSTs).CHEMOSPHERE,127,188-194.
MLA Lu, Guangyuan,et al."Environmental effects of modified clay flocculation on Alexandrium tamarense and paralytic shellfish poisoning toxins (PSTs)".CHEMOSPHERE 127(2015):188-194.
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