AI Article Synopsis
- Following defocused ion beam sputtering, highly corrugated and faceted nanoripples form on calcite surfaces in a self-organized manner.
- High-resolution atomic force microscopy (AFM) shows that these ripples consist of intricate facets that become smoother upon exposure to PbClaqueous solution, facilitating lead uptake.
- Analysis indicates a significant 500% increase in lead absorption rate on nanostructured calcite compared to fresh surfaces, suggesting potential applications for lead removal in contaminated water systems.
Article Abstract
Following defocused ion beam sputtering, large area highly corrugated and faceted nanoripples are formed on calcite (10.4) faces in a self-organized fashion. High resolution atomic force microscopy (AFM) imaging reveals that calcite ripples are defined by facets with highly kinked (11.0) and (21¯.12) terminations.AFM imaging during the exposure of such modified calcite surfaces to PbClaqueous solution reveals that the nanostructured calcite surface promotes the uptake of Pb. In addition, we observed the progressive smoothing of the highly reactive calcite facet terminations and the formation of Pb-bearing precipitates elongated in registry with the underlying nanopattern. By SEM-EDS analysis we quantified a remarkable 500% increase of the Pb uptake rate, up to 0.5 atomic weight % per hour, on the nanorippled calcite in comparison to its freshly cleaved (10.4) surfaces. These results suggest that nanostructurated calcite surfaces can be used for developing future systems for lead sequestration from polluted waters.
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| http://dx.doi.org/10.1088/1361-6528/acdbd4 | DOI Listing |
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