The Effect of Surface Pretreatment with Polymaleic Acid, Phosphoric Acid, or Oxalic Acid on the Dissolution Kinetics of Calcium Carbonate in Aqueous Acid

Authors: Wilkins S.J.¹; Compton R.G.¹; Viles H.A.²

Source: Journal of Colloid and Interface Science, Volume 242, Number 2, October 2001 , pp. 378-385(8)

Buy & download fulltext article:

Price: $52.63 plus tax (Refund Policy)

Abstract:

The kinetics of calcite dissolution in aqueous acidic solution following various surface treatments was investigated using the channel flow cell method with microdisk electrode detection. Pretreatment of calcite with solutions of polymaleic acid, phosphoric acid, or oxalic acid for up to 24 h is shown to provide protective coatings over the calcite, which substantially reduces further acid attack on the surface. Quantitatively each pretreatment was found to lead to a rate constant for proton-induced calcite dissolution of as low as 0.003 cm s^-1, an order of magnitude less than that observed for untreated calcite, 0.035 cm s^-1 at 21°C. Copyright 2001 Academic Press.

Language: English

Document Type: Research article

Affiliations: 1: Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, United Kingdom 2: School of Geography, Oxford University, Mansfield Road, Oxford, OX1 3TB, United Kingdom

Publication date: 2001-10-01