Title
Structural Incorporation of Neptunyl(V) into Calcite: Interfacial Reactions and Kinetics,Used
Delivery time: 8-12 business days (International)
The disposal of high?level nuclear waste in deep geological formations poses major scientific and social challenges to be met in the next decades. Over geological time spans it cannot be excluded that groundwater will infiltrate into a waste repository. It needs to be considered that permeating groundwater corrodes waste canisters and mobilizes radionuclides from the waste. Demonstrating the repository safety requires a sound understanding of the migration and retention behavior of radionuclides in the geosphere. In this experimental study sorption reactions of neptunyl(V) with the mineral phase calcite have been investigated. The calcite surface is investigated by means of zetapotential and surface diffraction measurements. The surface adsorption of neptunyl(V) at calcite is investigated over a large range of Np concentrations and pH. Upon coprecipitation neptunyl(V) is readily incorporated into the calcite structure. The structures of an adsorption complex and the incorporation species are characterized by EXAFS spectroscopy. The reactivity of the calcite surface makes calcite a potentially important sink for neptunyl(V) in the geosphere.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.