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This is to certify that your paper entitled «Do adsorbent pore size and specific surface area affect the kinetics of methyl orange aqueous phase adsorption?» was indexed with 11 pages, in the CIVILICA citation database, code COI:JR_JCHE-2-4_003, after evaluation and approval of the referees of the "Journal of Chemistry Letters Vol 2, Issue 4 , Year 2022.

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