Presented to

[نام نویسنده را انتخاب نمایید]

This is to certify that your paper entitled «Synthesized chitosan/ iron oxide nanocomposite and shrimp shell in removal of nickel, cadmium and lead from aqueous solution» was indexed with 12 pages, in the CIVILICA citation database, code COI:JR_GJESM-3-3_004, after evaluation and approval of the referees of the "Global Journal of Environmental Science and Management Vol 3, Issue 3 , Year 2017.

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 journal 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.