干旱区生态环境知识资源中心(Arid): Atmospheric Processing of Iron-Bearing Mineral Dust Aerosol and Its Effect on Growth of a Marine Diatom, Cyclotella meneghiniana

Arid

DOI	10.1021/acs.est.0c06995
	Atmospheric Processing of Iron-Bearing Mineral Dust Aerosol and Its Effect on Growth of a Marine Diatom, Cyclotella meneghiniana
	Hettiarachchi, Eshani; Ivanov, Sergei; Kieft, Thomas; Goldstein, Harland L.; Moskowitz, Bruce M.; Reynolds, Richard L.; Rubasinghege, Gayan
通讯作者	Rubasinghege, G (corresponding author), New Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801 USA.
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
EISSN	1520-5851
出版年	2021
卷号	55 期号:2 页码:871-881
英文摘要	Iron (Fe) is a growth-limiting micronutrient for phytoplankton in major areas of oceans and deposited wind-blown desert dust is a primary Fe source to these regions. Simulated atmospheric processing of four mineral dust proxies and two natural dust samples followed by subsequent growth studies of the marine planktic diatom Cyclotella meneghiniana in artificial sea-water (ASW) demonstrated higher growth response to ilmenite (FeTiO3) and hematite (alpha-Fe2O3) mixed with TiO2 than hematite alone. The processed dust treatment enhanced diatom growth owing to dissolved Fe (DFe) content. The fresh dust-treated cultures demonstrated growth enhancements without adding such dissolved Fe. These significant growth enhancements and dissolved Fe measurements indicated that diatoms acquire Fe from solid particles. When diatoms were physically separated from mineral dust particles, the growth responses become smaller. The post-mineralogy analysis of mineral dust proxies added to ASW showed a diatom-induced increased formation of goethite, where the amount of goethite formed correlated with observed enhanced growth. The current work suggests that ocean primary productivity may not only depend on dissolved Fe but also on suspended solid Fe particles and their mineralogy. Further, the diatom C. meneghiniana benefits more from mineral dust particles in direct contact with cells than from physically impeded particles, suggesting the possibility for alternate Fe-acquisition mechanism/s.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000612354700009
WOS关键词	SILVER NANOPARTICLES ; CHEMICAL-COMPOSITION ; PARTICLE-SIZE ; FLY-ASH ; SOLUBILITY ; DISSOLUTION ; PHOTOCATALYSIS ; TITANIUM ; SORPTION ; DIOXIDE
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350158
作者单位	[Hettiarachchi, Eshani; Rubasinghege, Gayan] New Mexico Inst Min & Technol, Dept Chem, Socorro, NM 87801 USA; [Ivanov, Sergei] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA; [Kieft, Thomas] New Mexico Inst Min & Technol, Dept Biol, Socorro, NM 87801 USA; [Goldstein, Harland L.; Reynolds, Richard L.] US Geol Survey, Geosci & Environm Change Sci Ctr, Denver, CO 80225 USA; [Moskowitz, Bruce M.; Reynolds, Richard L.] Univ Minnesota, Inst Rock Magnetism, Dept Earth & Environm Sci, Minneapolis, MN 55455 USA
推荐引用方式 GB/T 7714	Hettiarachchi, Eshani,Ivanov, Sergei,Kieft, Thomas,et al. Atmospheric Processing of Iron-Bearing Mineral Dust Aerosol and Its Effect on Growth of a Marine Diatom, Cyclotella meneghiniana[J]. United States Geological Survey,2021,55(2):871-881.
APA	Hettiarachchi, Eshani.,Ivanov, Sergei.,Kieft, Thomas.,Goldstein, Harland L..,Moskowitz, Bruce M..,...&Rubasinghege, Gayan.(2021).Atmospheric Processing of Iron-Bearing Mineral Dust Aerosol and Its Effect on Growth of a Marine Diatom, Cyclotella meneghiniana.ENVIRONMENTAL SCIENCE & TECHNOLOGY,55(2),871-881.
MLA	Hettiarachchi, Eshani,et al."Atmospheric Processing of Iron-Bearing Mineral Dust Aerosol and Its Effect on Growth of a Marine Diatom, Cyclotella meneghiniana".ENVIRONMENTAL SCIENCE & TECHNOLOGY 55.2(2021):871-881.