Abstract
A halophilic bacteria Halomonas BVR 1 in conjunction with reduced Graphene Oxide (rGO) was used as an adsorbent to remove lead, cadmium and zinc from aqueous solutions. The biosorbent surface characterization was done through FT-IR, SEM-EDAX and XRD studies. Adsorption was thermodynamically feasible and it supported the pseudo second order kinetics. Studies show that cadmium obeyed a monolayer kind of adsorption phenomenon following the Langmuir isotherm. Adsorption of lead and zinc adhered to Freundlich isotherm. The column studies were effective in treating metal ion solutions up to 500 mL volume and the microbe modified rGO biosorbent showed good ability to sequester these metal ions in a real effluent sample.
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