| Modified local sands for the mitigation of harmful algal blooms | |
| Pan, Gang1; Chen, Jing2; Anderson, Donald M.3 | |
| 发表期刊 | HARMFUL ALGAE
 |
| ISSN | 1568-9883 |
| 2011-05-01 | |
| 卷号 | 10期号:4页码:381-387 |
| 关键词 | Chitosan Harmful Algal Bloom Modified Sands Polyaluminum Chloride (Pac) Seawater Synergistic Effect |
| 产权排序 | [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 |
| 通讯作者 | Pan, G, Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 10085, Peoples R [email protected] ; [email protected] ; [email protected] |
| 作者部门 | 污染过程与控制实验室 |
| 英文摘要 | 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.; 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. |
| 文章类型 | Article |
| 资助机构 | Chinese Academy of Sciences [kzcx2-yw-225] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | CLAY FLOCCULATION ; CYANOBACTERIAL BLOOMS ; KARENIA-BREVIS ; RED-TIDE ; CHITOSAN ; REMOVAL ; SOILS ; INVERTEBRATES ; COAGULATION ; EFFICIENCY |
| 研究领域[WOS] | Marine & Freshwater Biology |
| WOS记录号 | WOS:000289809600005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/4901 |
| 专题 | 中国科学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 |
| 作者单位 | 1.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 |
| 推荐引用方式 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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