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Colloid-facilitated transport

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 13, 2024
Entity authorityQ3997849 ↗
Source-derived summary

Colloid-facilitated transport designates a transport process by which colloidal particles serve as transport vector

of diverse contaminants in the surface water (sea water, lakes, rivers, fresh water bodies) and in underground water circulating in fissured rocks

(limestone, sandstone, granite, ...). The transport of colloidal particles in surface soils and in the ground can also occur, depending on the soil structure, soil compaction, and the particles size, but the importance of colloidal transport was only given sufficient attention during the 1980 years.

Radionuclides, heavy metals, and organic pollutants, easily sorb onto colloids suspended in water and that can easily act as contaminant carrier.

Various types of colloids are recognised: inorganic colloids (clay particles, silicates, iron oxy-hydroxides, ...), organic colloids (humic and fulvic substances). When heavy metals or radionuclides form their own pure colloids, the term "Eigencolloid" is used to designate pure phases, e.g., Tc(OH)4, Th(OH)4, U(OH)4, Am(OH)3. Colloids have been suspected for the long range transport of plutonium on the Nevada Nuclear Test Site. They have been the subject of detailed studies for many years. However, the mobility of inorganic colloids is very low in compacted bentonites and in deep clay formations

because of the process of ultrafiltration occurring in dense clay membrane.

The question is less clear for small organic colloids often mixed in porewater with truly dissolved organic molecules.

Editorial summary

“Colloid-facilitated transport” enters the record as open-knowledge reference entry. Crown Archives preserves that source wording while asking what Colloid-facilitated, transport and Open-knowledge can confirm, complicate or overturn.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1980—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Colloid-facilitated, transport and Open-knowledge.
Editorial analysis

Why this record matters

“Colloid-facilitated transport” is worth following because a concise public description often conceals a longer documentary argument. Here, Colloid-facilitated, transport and Open-knowledge provides the most credible route into that argument.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 13, 2024. The linked authority identifier is Q3997849. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1980.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from “Colloid-facilitated transport” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.