A Comparative Study on the Biosorption of Cd2+ onto Paecilomyces lilacinus XLA and Mucoromycote sp. XLC

Abstract

The filamentous fungi XLA and XLC isolated from Cd-contaminated soil were identified morphologically and phylogenetically as Paecilomyces lilacinus and Mucoromycote sp., respectively. The minimum inhibitory concentrations (MICs) of Cd2+, Co2+, Cu2+, Zn2+, Cr3+ and Cr6+ in minimum mineral (MM) medium agar plates were 29,786, 2945, 9425, 5080, 1785 and 204 mg·L−1 for XLA and 11,240, 884, 9100, 2540, 3060 and 51 mg·L−1 for XLC, respectively. Favorable biosorption conditions for adsorption of Cd2+ by the tested fungi were investigated. Efficient performances of the biosorbents were described using Langmuir isotherm model, and the predicted maximum biosorption capacities for Cd2+ were 77.61 mg·g−1 of XLA and 79.67 mg·g−1of XLC. Experiments on desorption potential of biosorbents validated their efficacy at a large scale. Results showed that XLA obtained a desorption rate of 84.7% by 2% EDTA and XLC gained a desorption rate of 78.9% by 0.1 M HCl. Analysis by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) and X-ray photoelectron spectroscopy (XPS) suggested that groups of C–N, COO– for XLA and C–N, CH2 and phosphate for XLC were the dominant binding sites for Cd2+ biosorption. Our results indicated that the fungus XLA, rather than XLC, could potentially be used as an inexpensive, eco-friendly and effective bioremediation agent for the removal of Cd2+ from wastewater.

Bioremoval of Cu2+ from CMP wastewater by a novel copper-resistant bacterium Cupriavidus gilardii CR3: characteristics and mechanisms

“…Functional groups such as carboxyl, hydroxyl, amino, and phosphate groups played a key role during the metal ion binding process. 35,36 The present FTIR analysis also provided evidence that these functional groups were involved in the binding of copper for C. gilardii CR3.…”

Alginate and Algal-Based Beads for the Sorption of Metal Cations: Cu(II) and Pb(II)

“…The other is the difficulty of separation of spent sorbents from the treated water. For the first problem, low-cost and efficient materials are constantly being developed as alternative sorbents [ 5 ]. Numerous studies have advocated the utilization of marine resources as biosorbents for the removal of heavy metals from contaminated wastewater, as they are abundant, renewable and environmentally-friendly in terms of elimination at the end of their life-cycle [ 6 ].…”

Bioremediation and extracellular synthesis of copper nanoparticles from wastewater using Yarrowia lipolytica AUMC 9256

“…These complexes are located near the cell surface and hence might be excluded from the medium with the help of some amino acids (Ito et al, 2007). An increase in atomic % of sulfur may be due to the formation of precipitates in the form of sulfate on the cell surface (Xia et al, 2015). From EDX analysis, it can be concluded that ion exchange, intracellular and extracellular precipitation may be included in Cu(II) uptake by Y. lipolytica AUMC 9256.…”