calcium carbonate deposition

What is it about?

In this paper the effect of green inhibitor, prepared from aqueous extract of Paronychia Argentea, on calcium carbonate deposition onto steel surface was investigated. The experimental chronoamperometric curves of nucleation growth process of calcium carbonate that exhibit delay when green inhibitor was added were successfully reproduced by the associated modeling work which solved the convectivediffusion equation to calculate the limiting current of Oxygen Reduction Reaction at a Rotating Disk electrode

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Why is it important?

In this paper, a comprehensive numerical study has been conducted to investigate the nucleation-growth process ofcalcium carbonate on rotating disk electrode in mineral potable water in presence of aqueous extract of Paronychia Argentea at concentration of 76 ppm. We have shown that the equation governing convective-diffusion can be solved by finite element method and used for modeling the delay effect of CaCO3 nucleation-growth process at electrode in presence of inhibitor. The model elaborated in this work helps to elucidate the relative effect of Paronychia argentea extract on nucleation-growth process of calcium carbonate. It was found that the PA inhibitor gives rise to a delay effect on the lateral growth rate for about 30 min. However the interference of the PA inhibitor was clearly observed on the vertical growth due to its adsorption on crystals CaCO3 facets leading to a degenerated calcite shape