00000nam 2200000zi 4500 9.870711 CaOODSP 20241203113647 m o d f cr bn||||||||| 190327s1991 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre En13-5/91-76E-PDF Droppo, I. G., author. Suspended sediment concentration by filtration : effect on primary grain-size distribution (technical note) / I.G. Droppo, B.G. Krishnappan and E.D. Ongley. Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1991] 1 online resource (4 unnumbered pages, 9 pages, 3 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 91-76 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The influence of concentrating suspended sediments by filtration for analysis with the Malvern Particle Sizer is determined. Low concentration solutions with known primary grain-size distributions (determined by a Malvern Particle Sizer) were filtered onto two types of filters (0.4 µm Nuclepore polycarbonate plastic membrane filter and 0.45 µm Millipore cellulose membrane filter). The sediments were resuspended by a distilled water wash to produce higher concentration solutions, sonicated, and again analyzed by the Malvern Particle Sizer for their primary grain-size distributions. The comparison of the initial and resuspended grain size distributions revealed minimal difference between the two. There was some evidence of filter disintegration and pore clogging, however, their influence on the distributions was minimal. It is expected that the errors induced by pore clogging may increase with samples containing significant amounts of organic matter"--Abstract. Includes management perspective and abstract in French. gccst Sediments Krishnappan, B. G., 1943- author. Ongley, Edwin D., author. Canada. Environment Canada. National Water Research Institute (Canada). Rivers Research Branch. National Water Research Institute (Canada) NWRI contribution ; no. 91-76. (CaOODSP)9.844121 PDF 1.43 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-91-76-eng.pdf