Flocculation of harmful algal cells using modified clay: effects of the properties of the clay suspension

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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
刊名	JOURNAL OF APPLIED PHYCOLOGY
	2016-06-01
卷号	28 期号:3 页码:1623-1633
关键词	HABs Control Modified clay suspension Physicochemical properties Sulfate ion pH
英文摘要	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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000375315100018
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/131052]
专题	海洋研究所_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
推荐引用方式 GB/T 7714	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.