Study on removal of brown tide-<em>Aureococcus anophagef ferens</em> by modified clay

ZHANG Yaqi; YU Zhiming; SONG Xiuxian; CAO Xihua; LIU Yang

doi:10.3969/j.issn.0253-4193.2013.03.023

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Article Navigation > Haiyang Xuebao > 2013 > 35(3): 197-203

ZHANG Yaqi, YU Zhiming, SONG Xiuxian, CAO Xihua, LIU Yang. Study on removal of brown tide-Aureococcus anophagef ferens by modified clay[J]. Haiyang Xuebao, 2013, 35(3): 197-203. doi: 10.3969/j.issn.0253-4193.2013.03.023

Citation:

ZHANG Yaqi, YU Zhiming, SONG Xiuxian, CAO Xihua, LIU Yang. Study on removal of brown tide-Aureococcus anophagef ferens by modified clay[J]. Haiyang Xuebao, 2013, 35(3): 197-203. doi: 10.3969/j.issn.0253-4193.2013.03.023

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Study on removal of brown tide-Aureococcus anophagef ferens by modified clay

doi: 10.3969/j.issn.0253-4193.2013.03.023

1.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of the Chinese Academy of Sciences, Beijing 100049, China
2.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

Received Date: 2012-12-27
Rev Recd Date: 2012-03-21

Abstract

Abstract

Brown tide is a type of harmful algal bloom caused by picoplanktonic algae. It has occured continuously since 2009 and caused significant economic losses in the Bohai Sea. Controlling and reducing detrimental environmental and economic losses in affected ecosystems become an urgent problem in situations where accurate prevention and pre-control systems are not available. Mitigation of HABs by clays is an important and widely used control method. A variety of original clays and modified clays were tested on the brown tide species-Aureococcus anophagef ferens and five typical clays were chosen as the main experimental material. A series of experiments that employed original and modified clays to remove Aureococcus anophagef ferens were tested. The results showed that removal efficiency of Aureococcus blooms may be limited due to their small size and cellular density. The removal efficiency varied with the type of clay and kaolinite indicated better removal ability as compared to montmorillonite. After modification, all clay types showed significant improvement with more than three folds in removal rates. Additionally, application procedures that increase the concentration of original and modified clays, select the appropriate clay particle size and use fresh water as dispersion medium would achieve higher cell removal efficiency. Overall, our study laid a foundation for further research into the more efficient, environmentally removal materials and technologies that can be used as emergency control strategies for brown tide in coastal waters.
- modified clay,
- brown tide,
- Aureococcus anophagefferens,
- removal efficiency

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