The identification of toxic metals in Macrofungus species diverted the attention of the researchers for the development of remediation models. Mushrooms represent an important food commodity cultivated in different parts of the world. 51The present study is designed to exploit the property of metal accumulation in the chitin wall of Mushrooms (Pleurotus ostreatus) for the development of biocomposite. A series of novel composites are prepared using calcium alginate, silica and alumina separately and in combination of 10:1 with Macrofungus. Each composite is characterized through FTIR, SEM and EDX to determine the surface and bulk characteristics. The 66FTIR analysis revealed –CH, C–O–C (sugar), C= O conjugation and –NH functional groups confirming the proteinaceous nature of Macrofungus. SEM and EDX also confirm the successful preparation showing significant elemental composition of Ca, Si, and Al in respective composites. BET analysis indicated higher surface area for inorganic precursors (SiO2 and Al2O3) than organic moiety (calcium alginate). The prepared composites are applied as 64adsorbents in batch mode for the removal of three selected metals (Lead, Cadmium and Chromium) also known as cumulative poisons. For adsorption experiments, optimization of pH is also attempted. The results are encouraging showing optimum removal of 99% during contact of 45 minutes between the adsorbate and adsorbent. It is also noted that functionalized composites (FMF, FMFSi, FMFAl, FMFSiAl) show relatively less adsorption of metals likely due to stabilizing effect of inorganic precursors (Silica and alumina) and immobilization of Macrofungus by calcium alginate. The metal removal follow the sequence Cr>Cd>Pb in accordance with position of elements in the periodic table. Kinetics and isotherms were applied for each metal and each adsorbent. 49Freundlich and Temkin isotherms fitted best to the adsorption data. The study recommends that the prepared biocomposites can effectively be applied as remediation model 61for the removal of metals and other pollutants as well.
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