DOI: 10.1016/j.watres.2018.05.059
Scopus记录号: 2-s2.0-85049313189
论文题名: Characterization, origin and aggregation behavior of colloids in eutrophic shallow lake
作者: Xu H. ; Xu M. ; Li Y. ; Liu X. ; Guo L. ; Jiang H.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 176
结束页码: 186
语种: 英语
英文关键词: Aggregation behavior
; Aquatic colloids
; Eutrophic shallow lakes
; Molecular size fractionation
; Natural organic matter
Scopus关键词: Agglomeration
; Biogeochemistry
; Biological materials
; Colloids
; Eutrophication
; Lakes
; Light scattering
; Organic compounds
; Suspended sediments
; Water pollution
; Water quality
; Aggregation behavior
; Aquatic colloids
; Molecular size fractionation
; Natural organic matters
; Shallow lakes
; Suspensions (fluids)
; aluminum
; electrolyte solution
; ferric ion
; inorganic compound
; lake water
; natural organic matter
; silicon
; aggregation
; colloid
; eutrophic environment
; lake
; mineral
; organic matter
; particle size
; shallow water
; shape
; size distribution
; aggregation kinetics
; Article
; chemical composition
; chemical reaction
; colloid
; electron diffraction
; electrophoretic mobility
; eutrophic shallow lake
; eutrophication
; fractionation
; hydrodynamics
; lake ecosystem
; light scattering
; microscopy
; mineralogy
; molecular size
; molecular weight
; nonhuman
; particle size
; photon correlation spectroscopy
; priority journal
; sediment
; simulation
; spectroscopy
; turbidity
; ultrafiltration
; water pollutant
; water sampling
; China
; Taihu Lake
英文摘要: Stability of colloidal particles contributes to the turbidity in the water column, which significantly influences water quality and ecological functions in aquatic environments especially shallow lakes. Here we report characterization, origin and aggregation behavior of aquatic colloids, including natural colloidal particles (NCPs) and total inorganic colloidal particles (TICPs), in a highly turbid shallow lake, via field observations, simulation experiments, ultrafiltration, spectral and microscopic, and light scattering techniques. The colloidal particles were characterized with various shapes (spherical, polygonal and elliptical) and aluminum-, silicon-, and ferric-containing mineralogical structures, with a size range of 20–200 nm. The process of sediment re-suspension under environmentally relevant conditions contributed 78–80% of TICPs and 54–55% of NCPs in Lake Taihu, representing an important source of colloids in the water column. Both mono- and divalent electrolytes enhanced colloidal aggregation, while a reverse trend was observed in the presence of natural organic matter (NOM). The influence of NOM on colloidal stability was highly related to molecular weight (MW) properties with the high MW fraction exhibiting higher stability efficiency than the low MW counterparts. However, the MW-dependent aggregation behavior for NCPs was less significant than that for TICPs, implying that previous results on colloidal behavior using model inorganic colloids alone should be reevaluated. Further studies are needed to better understand the mobility/stability and transformation of aquatic colloids and their role in governing the fate and transport of pollutants in natural waters. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112646
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; College of Biology and the Environment, Nanjing Forestry University, Nanjing, 210037, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Freshwater Sciences, University of Wisconsin-Milwaukee, 600 E Greenfield Ave., Milwaukee, WI 53204, United States
Recommended Citation:
Xu H.,Xu M.,Li Y.,et al. Characterization, origin and aggregation behavior of colloids in eutrophic shallow lake[J]. Water Research,2018-01-01,142