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This is to certify that your paper entitled «Removal of Nickel and Cobalt Heavy Metals from Aqueous Solution Using Chitosan-Magnetic (Fe3O4) Nanocomposite» was indexed with 15 pages, in the CIVILICA citation database, code COI:CBGCONF05_016, after evaluation and approval of the referees of the "The 5th International Conference on Applied Research in Chemistry and Chemical Engineering with an emphasis on indigenous technology in Iran held in Tehran 2018.

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.