Flicker noise in vertical fluxes of particle-associated contaminants in the marine environment
Article Abstract:
Vertical transport of biogenic matter and persistent organic contaminants in sinking particles behave like a spatially extended system with both temporal and spatial degrees of freedom. A great number of vertical particle transport processes in the sea reveal the occurrence of 'flicker' noise, the mechanism behind which is said to be self-organized criticality. Four data sets of particle fluxes from different sites in the Western Mediterranean Sea were used to affirm the occurrence of SOC behavior in the vertical transport of particles in the marine environment.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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Modeling nonpoint source pollutants in the vadose zone with GIS
Article Abstract:
Geographic information systems (GIS) prove useful in environmental modeling, especially for nonpoint source pollutants (NPS) in the vadose zone. GIS-based modeling of NPS in the vadose zone provided for the measurement of a three-dimensional spatial distribution of each trasport parameter or variable which produced a tremedous volume of spatially indexed information brought about by the complex spatial heterogeneity demonstrated by the many numerous physical, chemical, and biological processes involved in solute transport through the vadose zone.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Trajectory modeling of non-Brownian particle flotation using an extended Derjaguin-Landau-Verwey-Overbeek approach
Article Abstract:
A limiting trajectory model was developed based on the extended Derjaguin-Landau-Verwey-Overbeek theory on hydrodynamic interactions to determine flotation removal efficiences of small particles. The model, which consists of van der Waals and an electrostatic component, predicts that long-range hydrophobic forces exists between a particle and the bubble surface. These forces exerts pressure on the particle to promote particle adhesion. Simulation tests using the model produced results that were comparable to theoretical results.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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