Use of single particle counters for the determination of the number and size distribution of colloids in natural surface waters

Rossé, Patrick; Loizeau, Jean‐Luc

doi:10.1016/s0927-7757(02)00565-4

Cited by 43 publications

(23 citation statements)

References 16 publications

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“…Samples that are too concentrated require preliminary dilution with ultra-filtered water. The technique and measuring procedures are detailed in Rossé and Loizeau (2003). Errors in number colloid concentration were below 5%.…”

Section: Colloid Particle Size Distributionsmentioning

confidence: 99%

Size and composition of inorganic colloids in a peri-alpine, glacial flour-rich lake

Chanudet

Filella

2008

Geochimica et Cosmochimica Acta

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Section: Colloid Particle Size Distributionsmentioning

confidence: 99%

Size and composition of inorganic colloids in a peri-alpine, glacial flour-rich lake

Chanudet

Filella

2008

Geochimica et Cosmochimica Acta

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“…They were conducted on 1.2 μm pre-filtered water, and with the 3 kDa PrepScale system for CF = 1.0 (feed), 1.9, 3.1, 4.5 and 10.0 in the first experiment, and CF = 1.0, 2.0, 4.4, and 11.1 in the second. The size distribution was measured in feed, permeate and retentate using the SPC technique which can count individual particles between 50 and 2,000 nm (Rossé and Loizeau 2003). The mass of colloids in each size class was estimated on the assumption that the colloids are spherical and of constant density.…”

Section: Effects Of Cf On Colloid Size Distributionmentioning

confidence: 99%

Comparison of Small- and Large-scale Ultrafiltration Systems for Organic Carbon and Metals in Freshwater at Low Concentration Factor

Kottelat

Vignati

Chanudet

et al. 2007

Water Air Soil Pollut

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Interdisciplinary studies on aquatic environments and cross-validation of laboratory vs. field results will likely increase the need for simultaneous use of large-and small-scale ultrafiltration systems. In this study, a comparison of two ultrafiltration systems differing in scale (PrepScale and PelliconXL, Millipore; membrane areas 0.54 m 2 and 0.005 m 2 , respectively), was made for the cut-offs 3 and 300 kDa. Large systems are useful for their high permeate throughput, while small systems are necessary when the amount of sample is limited. The ability of PrepScale and PelliconXL systems to provide comparable results for organic carbon fractionation was studied for polysaccharide solutions and natural freshwaters. In the latter, the colloidal proportions of different trace metals (V, Cr, Mn, Co, Ni, Cu, Sb, and U) were also determined. Although the colloidal proportions obtained with PelliconXL 3 kDa were sometimes slightly higher than with PrepScale 3 kDa (principally for DOC and U in natural waters), Mann-Whitney statistical test showed no significant difference in the overall fractionation properties of the two systems. Our observations show that reaching high concentration factors lead to a strong modification of colloids size distribution in the range 50-2,000 nm and thus low concentration factors are preferable to preserve the colloid integrity.

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“…The instrument (Particle Measuring Systems, Boulder, CO, USA) is based on the principle of light scattering by single particles. The measuring procedure is detailed in RossØ and Loizeau (2003). Analyses were always performed on site within 1 h of sample collection.…”

Section: Single Particle Countermentioning

confidence: 99%

The fate of inorganic colloidal particles in Lake Brienz

Chanudet

Filella

2007

Aquat. Sci.

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Abstract. The fate of colloidal particles in Lake Brienz and its two main tributaries, the Aare and Lütschine Rivers, was studied over a period of more than a year. Lake colloid loads from the unmodified Lütschine fluctuated significantly across seasons. The highest loads are in summer due to glacier melting. Colloid loads from the Aare reflected the seasonal water use by upstream hydropower plants. A significant number of mineral particles, even outside the theoretical nonsettling range, remain in suspension in the epilimnion of Lake Brienz in summer because of the mineralogical nature and shape of the particles and the high input loads. Only 1730 of the 16,800 tons of colloidal particles that entered the lake during the period from 1 June 2004 -31 July 2005 were exported through the lake outlet. The remainder was presumably lost in the lake through coagulation-sedimentation processes. Coagulation properties of non-fractionated colloid samples in quiescent conditions were studied in the laboratory both in the absence and presence of different organic compounds representative of natural organic matter. Lake Brienz colloids coagulate slowly, as expected from particles (mainly phyllosilicates) bearing a net negative surface charge. Slightly higher coagulation rates were recorded in March and April during the spring algal bloom, which suggests that colloid coagulation is enhanced by carbohydrates. This effect was confirmed in laboratory experiments. However, the concentration of natural organic matter in Lake Brienz is so low that it is not having any significant effect on the fate of inorganic colloids.

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Use of single particle counters for the determination of the number and size distribution of colloids in natural surface waters

Cited by 43 publications

References 16 publications

Size and composition of inorganic colloids in a peri-alpine, glacial flour-rich lake

Size and composition of inorganic colloids in a peri-alpine, glacial flour-rich lake

Comparison of Small- and Large-scale Ultrafiltration Systems for Organic Carbon and Metals in Freshwater at Low Concentration Factor

The fate of inorganic colloidal particles in Lake Brienz

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