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Flocculation of harmful algal cells using modified clay: effects of the properties of the clay suspension
Liu, Yang1,2,3; Cao, Xihua1,3; Yu, Zhiming1,3; Song, Xiuxian1,3; Qiu, Lixia1,2,3
2016-06-01
发表期刊JOURNAL OF APPLIED PHYCOLOGY
卷号28期号:3页码:1623-1633
文章类型Article
摘要Large differences occur between the removal efficiencies (RE) of polyaluminum chloride modified clay (PAC-MC) suspensions prepared using deionized water (DW) and seawater (SW). This showed that physicochemical properties of PAC-MC suspension influenced its ability to remove algal cells. The efficiency at which a PAC-MC suspension removed Aureococcus anophagefferens (CCMP 1984) and Phaeocystis globosa from water was determined using diluted seawater (DSW), dissolved ion species, ion concentrations, pH, temperatures, and suspension aging times. The RE decreased generally as the percentage of seawater increased, and the RE was higher for PAC-MC prepared using DW than that using SW. The ion species present and the ion concentrations in the suspension influenced the RE, with sulfate negatively affecting the RE more than the other ions tested. Sulfate in the PAC-MC suspension showed a "V"-shaped effect which can be partially explained by charge neutralization and "patch coagulation" that played different parts in the flocculation process. The effects of pH of PAC-MC suspension on the RE were greatly influenced by the dispersion medium. The RE of the PAC-MC suspended in DW decreased gradually, whereas RE of the PAC-MC suspended in SW followed a V-shaped trend, as the pH was increased. Surface charge is an important aspect in the removal mechanism of PAC-MC, but the flocculation behavior at low suspension pH conditions is less clear. Temperature and suspension aging time had no obvious effects on the RE. Appropriate explanation and mechanism is also proposed in the discussion. These studies showed that the RE could be further improved given proper attention to the properties of PAC-MC suspension.
关键词Habs Control Modified Clay Suspension Physicochemical Properties Sulfate Ion Ph
DOI10.1007/s10811-015-0735-x
收录类别SCI
语种英语
WOS记录号WOS:000375315100018
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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/337002/131052
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, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
第一作者单位中国科学院海洋研究所
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Liu, Yang,Cao, Xihua,Yu, Zhiming,et al. Flocculation of harmful algal cells using modified clay: effects of the properties of the clay suspension[J]. JOURNAL OF APPLIED PHYCOLOGY,2016,28(3):1623-1633.
APA Liu, Yang,Cao, Xihua,Yu, Zhiming,Song, Xiuxian,&Qiu, Lixia.(2016).Flocculation of harmful algal cells using modified clay: effects of the properties of the clay suspension.JOURNAL OF APPLIED PHYCOLOGY,28(3),1623-1633.
MLA Liu, Yang,et al."Flocculation of harmful algal cells using modified clay: effects of the properties of the clay suspension".JOURNAL OF APPLIED PHYCOLOGY 28.3(2016):1623-1633.
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