Magnetic Fe3O4 nanoparticles enhance cyanobactericidal effect of allelopathic p-hydroxybenzoic acid on Microcystis aeruginosa by enhancing hydroxyl radical production

doi:10.1016/j.scitotenv.2021.145201

	Magnetic Fe3O4 nanoparticles enhance cyanobactericidal effect of allelopathic p-hydroxybenzoic acid on Microcystis aeruginosa by enhancing hydroxyl radical production
	Zuo, Shengpeng 2,3; Yang, Hao 2,3; Jiang, Xiaofeng 2,3; Ma, Yongqing 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-05-20
卷号	770 页码:10
关键词	Cyanobactericidal effect Harmful algal bloom management Hydroxyl radical Magnetic Fe3O4 nanoparticle P-hydroxybenzoic acid
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.145201
通讯作者	Zuo, Shengpeng(spzuo@mails.ucas.ac.cn)
英文摘要	Recently, considerable progress has been made in the environmental application of nanotechnology. However, little is known about hownanomaterials might affect the cyanobacterial suppression potential of allelochemicals. In this study, a microcosm was employed to simulate and verify the effect of magnetic Fe3O4 nanoparticles (MFN) on the inhibitory influence of allelopathic hydroxybenzoic acid (p-Ha) on bloom-forming Microcystis aeruginosa. MFN had a hormetic effect on cyanobacterial growth. At a neutral concentration of 182 mg/L, MFN enhanced the algal suppression by p-Ha and decreased the IC50 by half, which was significantly and positively associated with the amount of .OH. Furthermore, adding MFN induced a stronger physiological response than treatment with only p-Ha. The cellular integrity was severely disrupted for the cyanobacterium M. aeruginosa. The total protein content decreased rapidly to inactivate the algae by limiting the amounts of extracellular microcystin and polysaccharide released. The modification of the effect of p-Ha byMFN was reflected by the intracellular NO content of M. aeruginosa. In addition, the typical radical scavengers ascorbic acid and 5,5-dimethyl-1-pyrroline N-oxide decreased .OH production to weaken algal suppression under the combined treatment with p-Ha and MFN. By contrast, the addition of Fe3+ and increasing the light intensity triggered the generation of .OH and strong cyanobacterial suppression. Thus, MFN could enhance the cyanobacterial control efficiency of p-Ha and decrease the input of allelochemicals in the field. These findings suggest a novel mode of allelochemical modification by nanomaterials as a promising cyanobactericide for harmful algal bloom management. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	Anhui Provincial Natural Science Foundation[1708085MC59]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000627896100060
资助机构	Anhui Provincial Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162018]
专题	中国科学院地理科学与资源研究所
通讯作者	Zuo, Shengpeng
作者单位	1.Northwest A&F Univ, Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Anhui Normal Univ, Minist Educ, Sch Ecol & Environm, Anhui Prov Engn Lab Water & Soil Pollut Control &, Wuhu 241003, Peoples R China 3.Anhui Normal Univ, Collaborat Innovat Ctr Recovery & Reconstruct Deg, Sch Ecol & Environm, Anhui Prov Engn Lab Water & Soil Pollut Control &, Wuhu 241003, Peoples R China
推荐引用方式 GB/T 7714	Zuo, Shengpeng,Yang, Hao,Jiang, Xiaofeng,et al. Magnetic Fe3O4 nanoparticles enhance cyanobactericidal effect of allelopathic p-hydroxybenzoic acid on Microcystis aeruginosa by enhancing hydroxyl radical production[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,770:10.
APA	Zuo, Shengpeng,Yang, Hao,Jiang, Xiaofeng,&Ma, Yongqing.(2021).Magnetic Fe3O4 nanoparticles enhance cyanobactericidal effect of allelopathic p-hydroxybenzoic acid on Microcystis aeruginosa by enhancing hydroxyl radical production.SCIENCE OF THE TOTAL ENVIRONMENT,770,10.
MLA	Zuo, Shengpeng,et al."Magnetic Fe3O4 nanoparticles enhance cyanobactericidal effect of allelopathic p-hydroxybenzoic acid on Microcystis aeruginosa by enhancing hydroxyl radical production".SCIENCE OF THE TOTAL ENVIRONMENT 770(2021):10.