Enhanced Adsorption and Antimicrobial Activity of Fabricated Apocynaceae Leaf Waste Activated Carbon by Cobalt Ferrite Nanoparticles for Textile Effluent Treatment.

Novel nano composite (ALW/CoFe2O4) adsorbent was synthesized from Apocynaceae leaf waste activated carbon (ALW) in combination with CoFe2O4by an auto combustion method for the removal of Reactive Red 141 dye and microorganisms against S. aureus, E. coli and C.albicans. The synthesized nano composite ALW/CoFe2O4 was characterized by SEM, EDX, BET, XRD, FTIR, TG & DSC and VSM. The results from these analytical techniques confirmed the aggregation of CoFe2O4 nano particles on the surface of ALW and VSM study showed its magnetic behavior. Subsequently, ALW/CoFe2O4 was adopted in batch mode adsorption studies by varying pH, adsorbent dosage, concentration and temperature. The adsorption efficiency was investigated under optimum conditions such as pH(6.5), adsorbent dosage (50 mg), contact time (70 min). The feasibility of adsorption was analyzed by fitting the data with pseudo first order, pseudo second order, Langmuir isotherm and Freundlich isotherm. The results showed that pseudo second order kinetics and Langmuir isotherm equation favour the adsorption of RR 141 on ALW/CoFe2O4. According to the thermodynamic study, it was very effective at higher temperatures and the thermodynamic parameters ∆Go, ∆Ho and ∆So were also evaluated for this adsorption. Furthermore, the antimicrobial activity of ALW/CoFe2O4 was tested by well diffusion method and compared with standard antibiotic. This ALW/CoFe2O4 exhibit good antimicrobial action with the zone of inhibition in the range of 10-17 mm. The synthesized nano composite (ALW/CoFe2O4) was evaluated for antimicrobial activityagainst (Staphylococcus aureus, Escherichia coli and Candida ablicans),usingwell diffusion methodand compared with standard antibacterial (Streptomycin) and antifungal (Amphotericin B).The antibacterial activity of ALW/CoFe2O4 against S. aureus (range between from 11.83 ± 0.23 mm to 17.5 ± 0.16 mm) and (range between E. coli 10.5 ± 0.40 to 17.0 ± 0.41 mm), while antifungistatic effectagainst C. albicans(range between 11.0 ± 0.24 to 17.6 ± 0.08), with different concentrations (100-500 mg) From the obtained results the antimicrobial activity of synthesized ALW/CoFe2O4 more or less same in the range between 11 and 17.56 mm of zone of inhibition. [ABSTRACT FROM AUTHOR]