Molecular Identification and Nickel Biosorption with the Dead Biomass of Some Metal Tolerant Fungi

Bioremoval of some heavy metals from aqueous solutions by two different indigenous fungi Aspergillus sp. AHM69 and Penicillium sp. AHM96 isolated from petroleum refining wastewater

“…The effect of different initial metals concentration (50, 100, 200, 300, 400 and 500 mg/L of both metals) at different contact times (10 min–1440 min) as well as various live biosorbent dosages (0.05, 0.1, 0.2, 0.3, 0.4, 0.5 and 1.0%) of AHM69 and AHM96, separately at higher metal concentrations i.e., 400, 500 and 1000 mg/L of Fe 3+ and Co 2+ heavy metals for 180 min as contact time on the validity of bioremediation were evaluated. The parameter being optimized was applied in the next experiment and so on until the optimization process is completed based on the previous reports ( El-Gendy et al., 2011 , 2017 ; Alzahrani et al., 2017 ; Alzahrani and El-Gendy, 2019 ).…”

Bioremoval of heavy metals from aqueous solution using dead biomass of indigenous fungi derived from fertilizer industry effluents: isotherm models evaluation and batch optimization

“…The rapid uptake of Mn 2+ , Ni 2+ , Pb 2+ and Zn 2+ on NRCA8 (1.70, 2.15, 5.86 and 3.78 mg/g) along with the highest removal efficiency (28.81%, 40.86%, 91.56% and 32.17), respectively were achieved and equilibrium was practically reached after 30 min contact time. The rapid adsorption capability through the initial phase is likely because of the abundance of vacant active locations on the NRCA8 dead biomass and the high concentration gradient of solutes Pb 2+ , Ni 2+ , Zn 2+ and Mn 2+ in the multi-metals solution as previously reported for the nickel, zinc and mercury biosorption by dead biomass of metal tolerant fungi (Alzahrani et al 2017 ; Alzahrani and El-Gendy 2019 ). There was no significant change in equilibrium concentration for Pb 2+ , Ni 2+ and Zn 2+ ions after 30 min but only a slight decrease for Mn 2+ ion was observed, these decreases may be attributed to the agglomeration of Pb 2+ , Ni 2+ , Zn 2+ and Mn 2+ onto the NRCA8 active sites, the difficulty of occupying the remaining binding locations because of forces concerning the solute molecules that solid and bulk stages and permanent interaction can occur.…”

“…Biosorption has many advantages, such as low cost removing contaminants even in dilute concentrations, using of biomass for removal of heavy metals, cheaper production of biomass (live and dead bacteria or fungi) can be used as biosorbents for the process of biosorption, multiple heavy metals uptake at a time, treatment of large volume of effluents, no necessity for chemical additions as extremely selective for uptake and removal of specific metals and it have great potential to be an economic method for heavy metals removal from industrial effluent (Khan et al 2022 ; El-Gendy et al 2011 , 2017a , b ). Bioadsorption of adsorbates from the aqueous solutions to the surface of the fungal biomass as green sorbent has advantages as small handling time, slight space requisite, low energy and chemical consumptions, low-cost and effective environmentally friendly technolog (Alzahrani et al 2017 ; Alzahrani and El-Gendy 2019 ).…”

Multimetal bioremediation from aqueous solution using dead biomass of Mucor sp. NRCC6 derived from detergent manufacturing effluent

“…As depicted in Table 2 , contact time of 30 min supported the highest removal efficiency (33.25, 46.33, and 87.50%) and adsorption capacity (1.99, 2.78, and 5.25 mg/g) of Mn 2+ , Ni 2+ , and Pb 2+ , respectively. The fast adsorption capacity through the initial stage was probably because of the abundance of vacant active sites on the biomass and the high concentration gradient of solutes Pb 2+ , Ni 2+ , and Mn 2+ in the multimetal solution (Alzahrani et al 2017 ; Alzahrani and El-Gendy 2019 ). However, the removal and adsorption rates of Mn 2+ , Ni 2+ , and Pb 2+ ions were decreased to reach 29.17% and 1.75 mg/g, 45.83% and 2.75 mg/g, and 87.17% and 5.23 mg/g, respectively, with increasing contact time to 180 min (Table 2 ).…”