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The thermal decomposition of pure ammonium heptamolybdate tetrahydrate (AHMT), and doped with Li+, Na+ and K+ ions was investigated using thermogravimetry, differential thermal。

AHMT and MB adsorbed AHMT named as MB-AHMT was characterized by FT-IR, PXRD, SEM and SEM-EDX techniquahmtes. Specific surface area (22.175 m 2 g -1 ) and pore volume

The GO-NH 2-AHMT adsorbents exhibit excellent adsorption performance with higher adsorption capacity (734.2 and 1091.1 mg/g for Cr(VI) and Hg(II), respectively)。

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