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Colloid particle sizes in the Mississippi River and some of its tributaries, from Minneapolis to below New Orleans
Author(s) -
Rostad Colleen E.,
Rees Terry F.,
Daniel Stephen R.
Publication year - 1998
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(199801)12:1<25::aid-hyp544>3.0.co;2-t
Subject(s) - tributary , colloid , particle (ecology) , particle size , centrifuge , environmental science , hydrology (agriculture) , suspension (topology) , particulates , materials science , geology , chemistry , geotechnical engineering , physics , geography , mathematics , paleontology , oceanography , cartography , organic chemistry , homotopy , nuclear physics , pure mathematics
An on‐board technique was developed that combined discharge‐weighted pumping to a high‐speed continuous‐flow centrifuge for isolation of the particulate‐sized material with ultrafiltration for isolation of colloid‐sized material. In order to address whether these processes changed the particle sizes during isolation, samples of particles in suspension were collected at various steps in the isolation process to evaluate changes in particle size. Particle sizes were determined using laser light‐scattering photon correlation spectroscopy and indicated no change in size during the colloid isolation process. Mississippi River colloid particle sizes from twelve sites from Minneapolis to below New Orleans were compared with sizes from four tributaries and three seasons, and from predominantly autochthonous sources upstream to more allochthonous sources downstream. © 1998 John Wiley & Sons, Ltd.