REMOVAL OF TOXIC HEAVY METAL IONS USING MODIFIED ADSORBENTNARESH KUMAR MISHRA, NIMISH MISHRA AND ABHYANSHI TRIPATHIAbstract The efficiency of iron hexamine gel for the removal of certain heavy metal ions has been increased by distributing the gel on used tealeaves. This modified tealeaves (MTL) exhibits good adsorption potential for mercury (II), lead (II), and chromium (VI); significant uptake for nickel (II), cadmium (II), and copper (II); but is a poor scavenger for zinc (II) and manganese (II). The adsorbent columns have been used to remove chromium (VI), mercury (II) and lead (II) from aqueous solutions.
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