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Application of PAC-modified kaolin to mitigate Prorocentrum donghaiense: effects on cell removal and phosphorus cycling in a laboratory setting
Lu, Guangyuan1,2,3; Song, Xiuxian1; Yu, Zhiming1; Cao, Xihua1
2017-04-01
发表期刊JOURNAL OF APPLIED PHYCOLOGY
卷号29期号:2页码:917-928
文章类型Article
摘要Among various strategies for mitigating harmful algal blooms (HABs), coagulation-flocculation of algal cells by modified clay (MC) has proven to be an effective method that is widely applied in East Asia. Inorganic nutrients produced by algal detritus decomposition after an HAB are quickly released into the overlying water, which may cause second eutrophication. For environmental safety reasons, it is of critical importance to consider the fate of flocculated organic matter and clarify its effects on nutrient cycling. The present study therefore compared cell density, in vivo chlorophyll-a fluorescence, pH, and nutrient concentrations (especially phosphorus) between control (A1) and MC-treated algal bloom waters (A2) in a laboratory setting. The results showed that 0.4 g L-1 of MC removed approximately 60 % of Prorocentrum donghaiense cells (original concentration = 4.63 +/- 0.05 x 10(8) cells L-1) and delayed residual algal apoptosis. MC effectively scavenged 51.4 % of total phosphorus (TP) and 94.2 % of dissolved inorganic phosphorus (DIP) in seawater. Additionally, there was no excess DIP release from the MC-algae matrix into the water column, providing secondary eutrophication through algal degradation unlikely. This study newly demonstrated that MC treatment can significantly alter the velocities of phosphorus cycling (small scale) through two main pathways: (1) the direct coagulation-flocculation effect and (2) indirect blocking. This study provided fundamental insight into the quick downward sinking and slow decomposition of algal detritus in a laboratory setting and directly relates to natural processes occurring during HAB senescence/termination.
关键词Phosphorus Harmful Algal Bloom (Hab) Modified Clay Mitigation Prorocentrum Donghaiense
DOI10.1007/s10811-016-0992-3
收录类别SCI
语种英语
WOS记录号WOS:000399241500026
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136718
专题海洋生态与环境科学重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, IOCAS, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Hong Kong Univ Sci & Technol, Shenzhen Res Inst, Marine Environm Lab, Shenzhen 518000, Peoples R China
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Lu, Guangyuan,Song, Xiuxian,Yu, Zhiming,et al. Application of PAC-modified kaolin to mitigate Prorocentrum donghaiense: effects on cell removal and phosphorus cycling in a laboratory setting[J]. JOURNAL OF APPLIED PHYCOLOGY,2017,29(2):917-928.
APA Lu, Guangyuan,Song, Xiuxian,Yu, Zhiming,&Cao, Xihua.(2017).Application of PAC-modified kaolin to mitigate Prorocentrum donghaiense: effects on cell removal and phosphorus cycling in a laboratory setting.JOURNAL OF APPLIED PHYCOLOGY,29(2),917-928.
MLA Lu, Guangyuan,et al."Application of PAC-modified kaolin to mitigate Prorocentrum donghaiense: effects on cell removal and phosphorus cycling in a laboratory setting".JOURNAL OF APPLIED PHYCOLOGY 29.2(2017):917-928.
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