Title
Mcanismes de rtention du cuivre dans les sols: Evaluation statistique des approches macroscopiques et spectroscopiques (Fren,Used
Delivery time: 8-12 business days (International)
Le cuivre est un lment chimique, nocif pour la matire vivante, qui peut s'associer sous de nombreuses formes aux constituants organiques et inorganiques des sols. A une chelle macroscopique, les modlisations thermodynamiques, sont insuffisantes pour conclure sur la nature des formes prsentes. La spectroscopie d'absorption X permet d'accder cette information. A cette chelle micromtrique, la variabilit spcifique des formes du cuivre d'un point d'analyse un autre se traduit par un changement du signal mesur. L'Analyse en Composantes Principales (ACP) permet alors en thorie de dnombrer les espces pures. Ces techniques ont t utilises pour caractriser les formes cuprifres d'une part dans des rizires contamines par une exploitation minire et d'autre part dans un bassin d'infiltration d'eaux de ruissellement. Les prsences de cuivre associ avec la matire organique et sous formes de cristaux localement spcifiques ont t mises en vidence. Mais, en raison de la faible fiabilit des indicateurs existants, le nombre total des espces n'a pu tre que major par ACP. Ce problme a t surmont par la mise au point d'un nouvel indicateur valu statistiquement.
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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.