DOI: 10.1016/j.watres.2017.12.004
Scopus记录号: 2-s2.0-85038005898
论文题名: Stream transport of iron and phosphorus by authigenic nanoparticles in the Southern Piedmont of the U.S.
作者: River M. ; Richardson C.J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 130 起始页码: 312
结束页码: 321
语种: 英语
英文关键词: Authigenic
; Colloids
; Nanoparticles
; Particle size distribution
; Particulate phosphorus
Scopus关键词: Aquatic ecosystems
; Biochemistry
; Colloids
; Crystalline materials
; High resolution transmission electron microscopy
; Iron
; Particle size
; Particle size analysis
; Phosphorus
; Transmission electron microscopy
; Urban transportation
; X ray diffraction
; Authigenic
; Biogeochemical fluxes
; Crystalline minerals
; Organic fractions
; Organic particles
; Particulate phosphorus
; Rural and urban
; Storm events
; Nanoparticles
; aluminum
; ferrous ion
; iron nanoparticle
; mineral
; nanoparticle
; phosphorus
; iron
; nanoparticle
; phosphorus
; aquatic ecosystem
; authigenic mineral
; baseflow
; bioavailability
; colloid
; nanoparticle
; oxidation
; particle size
; phosphorus
; quality control
; seasonality
; transmission electron microscopy
; ultrafiltration
; aquatic environment
; Article
; concentration process
; electron microscopy
; iron transport
; oxidation kinetics
; phase separation
; prevalence
; priority journal
; quality control
; seasonal variation
; stoichiometry
; stream (river)
; transmission electron microscopy
; ultrafiltration
; United States
; water transport
; X ray diffraction
; analysis
; chemistry
; North Carolina
; river
; season
; water pollutant
; Italy
; Piedmont [Italy]
; Aluminum
; Iron
; Microscopy, Electron, Transmission
; Nanoparticles
; North Carolina
; Phosphorus
; Rivers
; Seasons
; Ultrafiltration
; Water Pollutants, Chemical
; X-Ray Diffraction
英文摘要: Authigenic nanoparticles containing iron (Fe) and phosphorus (P) have been identified at the anoxic/oxic interface of various aquatic ecosystems, forming upon the oxidation of reduced Fe. Little is known about the prevalence of these authigenic nanoparticles in streams, their impact on biogeochemical fluxes, or the bioavailability of P associated with them. In this paper we used transmission electron microscopy to document the presence of authigenic (amorphous) nanoparticles, rich in Fe and P, in baseflow of streams in the Southern Piedmont region of the U.S. We used a simple centrifugation and ultrafiltration technique to separate authigenic nanoparticles from truly dissolved (<1 kDa) and crystalline mineral/coarse organic fractions in baseflow, employing three different quality control methods to verify a successful separation: X-ray diffraction, electron microscopy, and stoichiometry of Fe and aluminum. This allowed us to quantify the amount of Fe and P in three different fractions of baseflow: truly dissolved, authigenic nanoparticles, and crystalline mineral/coarse organic particles. For the rural and urban stream in our study, on average, authigenic nanoparticles in baseflow transport 66% of Fe, with baseflow concentrations ranging from 80 μg/L to 650 μg/L. Authigenic nanoparticles also transport an average of 38% of reactive P, depending upon seasonality and time elapsed since the last storm event. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113069
Appears in Collections: 气候减缓与适应
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作者单位: Duke University, United States
Recommended Citation:
River M.,Richardson C.J.. Stream transport of iron and phosphorus by authigenic nanoparticles in the Southern Piedmont of the U.S.[J]. Water Research,2018-01-01,130