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Coagulation of quartz particles in aqueous solutions of copper (II)
YKI – Ytkemiska institutet.
1998 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 208, 399-404 p.Article in journal (Refereed)
Abstract [en]

The colloidal stability of quarts suspension was determined over a wide range of pH in aqueous copper nitrate where the state of Cu(II) is changed from mainly aqua-ions and monohydroxyl complexes and colloidal precipitated copper hydroxide at higher pH. Two regions of instability were observed and in both cases the particles were shown to have low electrophoretic mobility. In the neutral pH region, the uptake of Co(II) was sufficient to reduce the mobility of the particles to zero, while in the high pH region evidence suggested coagulation between precipitated Cu(OH)2 and the quarts particles. It was shown that in all cases the coagulation was reversible and that the uptake of Cu(II) was dependent on the uncharged surface hydroxyl density. Studies of the coagulation kinetics showed that extended time scale were involved ( several minutes in the neutral pH region to tens of minutes at high pH ).

Place, publisher, year, edition, pages
1998. Vol. 208, 399-404 p.
Keyword [en]
Quartz, stability, copper, coagulation, electrokinetics, hydrolysable
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26727OAI: oai:DiVA.org:ri-26727DiVA: diva2:1053730
Note
A1191Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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