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This is to certify that your paper entitled «Valorization of Low-Grade and Secondary Copper Resources through Innovative Hydrometallurgical Techniques» was indexed with 19 pages, in the CIVILICA citation database, code COI:EMGBC09_104, after evaluation and approval of the referees of the "Eighth International Conference on Technology Development in Materials Engineering, Mining and Geology held in Tehran 2025.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.