Modified local sands for the mitigation of harmful algal blooms
Pan, Gang1; Chen, Jing2; Anderson, Donald M.3
Source PublicationHARMFUL ALGAE
ISSN1568-9883
2011-05-01
Volume10Issue:4Pages:381-387
KeywordChitosan Harmful Algal Bloom Modified Sands Polyaluminum Chloride (Pac) Seawater Synergistic Effect
Contribution Rank[Pan, Gang] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 10085, Peoples R China; [Chen, Jing] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Anderson, Donald M.] Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA
Corresponding AuthorPan, G, Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 10085, Peoples R China.gpan@rcees.ac.cn ; jingchen2004126@126.com ; danderson@whoi.edu
Department污染过程与控制实验室 
AbstractA new method was developed for marine harmful algal bloom (HAB) mitigation using local beach sand or silica sand modified with chitosan and polyaluminum chloride (PAC). Untreated sand was ineffective in flocculating algal cells, but 80% removal efficiency was achieved for Amphidinium carterae Hulburt and Chlorella sp. in 3 min (t(80) = 3 min) using 120 mg L-1 sand modified with 10 mg L-1 PAC and 10 mg L-1 chitosan. After several hours 92-96% removal was achieved. The t(80) for removing A. carterae using the modifiers only (PAC and chitosan combined) was 60 min and for Chlorella sp. 120 min, which are much slower than with the corresponding modified sand. Sands were critical for speeding up the kinetic processes of flocculation and sedimentation of algal flocs. PAC was helpful in forming small flocs and chitosan is essential to bridge the small flocs into large dense flocs. Chitosan was also important in inhibiting the escape of cells from the flocs. Chitosan and PAC used together as modifiers make it possible to use local beach sands for HAB mitigation in seawater. Economical and environmental concerns could be reduced through the use of sands and biodegradable chitosan, but the potential impacts of PAC need further study. (C) 2011 Elsevier B.V. All rights reserved.; A new method was developed for marine harmful algal bloom (HAB) mitigation using local beach sand or silica sand modified with chitosan and polyaluminum chloride (PAC). Untreated sand was ineffective in flocculating algal cells, but 80% removal efficiency was achieved for Amphidinium carterae Hulburt and Chlorella sp. in 3 min (t(80) = 3 min) using 120 mg L(-1) sand modified with 10 mg L(-1) PAC and 10 mg L(-1) chitosan. After several hours 92-96% removal was achieved. The t(80) for removing A. carterae using the modifiers only (PAC and chitosan combined) was 60 min and for Chlorella sp. 120 min, which are much slower than with the corresponding modified sand. Sands were critical for speeding up the kinetic processes of flocculation and sedimentation of algal flocs. PAC was helpful in forming small flocs and chitosan is essential to bridge the small flocs into large dense flocs. Chitosan was also important in inhibiting the escape of cells from the flocs. Chitosan and PAC used together as modifiers make it possible to use local beach sands for HAB mitigation in seawater. Economical and environmental concerns could be reduced through the use of sands and biodegradable chitosan, but the potential impacts of PAC need further study. (C) 2011 Elsevier B.V. All rights reserved.
SubtypeArticle
Indexed BySCI
Language英语
WOS KeywordCLAY FLOCCULATION ; CYANOBACTERIAL BLOOMS ; KARENIA-BREVIS ; RED-TIDE ; CHITOSAN ; REMOVAL ; SOILS ; INVERTEBRATES ; COAGULATION ; EFFICIENCY
WOS Research AreaMarine & Freshwater Biology
WOS IDWOS:000289809600005
Funding OrganizationChinese Academy of Sciences [kzcx2-yw-225]
Citation statistics
Cited Times:69[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/4901
Collection中科院海岸带环境过程与生态修复重点实验室_污染过程与控制实验室
Affiliation1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 10085, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
3.Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA
Recommended Citation
GB/T 7714
Pan, Gang,Chen, Jing,Anderson, Donald M.. Modified local sands for the mitigation of harmful algal blooms[J]. HARMFUL ALGAE,2011,10(4):381-387.
APA Pan, Gang,Chen, Jing,&Anderson, Donald M..(2011).Modified local sands for the mitigation of harmful algal blooms.HARMFUL ALGAE,10(4),381-387.
MLA Pan, Gang,et al."Modified local sands for the mitigation of harmful algal blooms".HARMFUL ALGAE 10.4(2011):381-387.
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