Real-time evaluation of natural organic matter deposition processes onto model environmental surfaces

Li, Wenlu1; Liao, Peng2,3; Oldham, Trey1; Jiang, Yi1; Pan, Chao1; Yuan, Songhu2; Fortner, John D.1

2018-02

10.1016/j.watres.2017.11.024

WATER RESEARCH   影响因子和分区

0043-1354

Natural organic matter (NOM) is ubiquitous in aqueous systems and dynamically partitions onto/from environmental surfaces. However, such interfacial processes have not been uniformly quantified in situ and in real time. In this work, adsorption and deposition processes of Suwannee River humic acid (SRHA) and Suwannee River fulvic acid (SRFA), as model NOM, were evaluated for a series of environmentally relevant interfaces. Real-time, interfacial phenomenon, including deposition, release, and adlayer viscoelastic properties, were quantified over a variety of water chemistries via quartz crystal microbalance with dissipation monitoring (QCM-D). Specifically, adlayer mass and deposition rates of SRHA and SRFA were evaluated as a function of NOM concentration/molecular weight (fraction), pH, electrolyte composition (type and concentration), and collector surface type. For these, the adsorption of SRHA onto aluminum oxide (Al2O3) and polystyrene (PS) surfaces follows the Langmuir isotherm model. Rapid, near-monolayer formation of SRHA/SRFA adlayers were observed on Al2O3, hydroxyapatite (HAP), and poly (L-lysine) (PLL) surfaces, but not on PS or iron oxide (Fe3O4) surfaces. The presence of divalent cations (Ca2+/Mg2+) at relatively low concentrations (0.5-5.0 mM) significantly enhances the mass of SRHA/SRFA deposited onto the surfaces of silica (SiO2), Al2O3, and PS. Viscoelastic properties of the adsorbed layer based on the ratio of dissipation to frequency revealed a relatively unique adlayer structure for SRHA in the presence of 5.0 mM Ca2+. (C) 2017 Published by Elsevier Ltd.

NOM Adsorption Deposition Release Environmental surfaces QCM-D

SCI ; EI

英语

NI期刊

其他

U.S. National Science Foundation (CBET)[1236653] ; U.S. National Science Foundation (CBET)[1437820]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Environmental ; Environmental Sciences ; Water Resources

WOS:000424716800023

PERGAMON-ELSEVIER SCIENCE LTD

20174704415413

Adsorption ; Alumina ; Amino acids ; Biogeochemistry ; Deposition ; Deposition rates ; Electrolytes ; Hydroxyapatite ; Iron oxides ; Isotherms ; Magnetite ; Organic compounds ; Positive ions ; Quartz crystal microbalances ; Silica ; Vapor deposition ; Viscoelasticity

Geochemistry:481.2 ; Electric Batteries and Fuel Cells:702 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Special Purpose Instruments:943.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO 63130 USA
2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, 388 Lumo Rd, Wuhan 430074, Hubei, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China

Li, Wenlu,Liao, Peng,Oldham, Trey,et al. Real-time evaluation of natural organic matter deposition processes onto model environmental surfaces[J]. WATER RESEARCH,2018,129:231-239.

Li, Wenlu.,Liao, Peng.,Oldham, Trey.,Jiang, Yi.,Pan, Chao.,...&Fortner, John D..(2018).Real-time evaluation of natural organic matter deposition processes onto model environmental surfaces.WATER RESEARCH,129,231-239.

Li, Wenlu,et al."Real-time evaluation of natural organic matter deposition processes onto model environmental surfaces".WATER RESEARCH 129(2018):231-239.