Simultaneous Removal of Metal Ions from Wastewater by a Greener Approach

Ibrahim, Lubna A.; El-Sesy, Marwa E.; ElSayed, ElSayed ElBastamy; Zeleňáková, Martina; Hlinkova, Maria; Mohamed, Essam Sh.; Abu-hashim, Mohamed

doi:10.3390/w14244049

Cited by 7 publications

(6 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the spectra of metal-loaded biomass, there has been no formation of new bands, indicating that the biosorption of studied metal ions process occurs mainly through ion-exchange interaction that is electrostatic [ 21 , 43 ]. Thus, in the spectrum of yeast biomass after silver ion biosorption, the shift of the bands corresponding to OH, CH=CH, –NH, and sulfo groups by 5–15 cm −1 was observed indicating their involvement in silver ion binding.…”

Section: Resultsmentioning

confidence: 99%

“…This is in agreement with Staron et al [ 10 ] and Zhao et al [ 34 ], who used coconut fiber and graphene oxide for silver sorption. Applicability of the pseudo-second model suggests that metal ion binding on the surface of S. cerevisiae is achieved via chemical interactions that include two active centers in favorable geometric positions [ 43 ]. It is suggested that the adsorption of the investigated metal ions occurs mainly due to ion exchange and surface complexation reactions at specific biosorption sites [ 34 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Yeast—As Bioremediator of Silver-Containing Synthetic Effluents

et al. 2023

View full text Add to dashboard Cite

Yeast Saccharomyces cerevisiae may be regarded as a cost-effective and environmentally friendly biosorbent for complex effluent treatment. The effect of pH, contact time, temperature, and silver concentration on metal removal from silver-containing synthetic effluents using Saccharomyces cerevisiae was examined. The biosorbent before and after biosorption process was analysed using Fourier-transform infrared spectroscopy, scanning electron microscopy, and neutron activation analysis. Maximum removal of silver ions, which constituted 94–99%, was attained at the pH 3.0, contact time 60 min, and temperature 20 °C. High removal of copper, zinc, and nickel ions (63–100%) was obtained at pH 3.0–6.0. The equilibrium results were described using Langmuir and Freundlich isotherm, while pseudo-first-order and pseudo-second-order models were applied to explain the kinetics of the biosorption. The Langmuir isotherm model and the pseudo-second-order model fitted better experimental data with maximum adsorption capacity in the range of 43.6–108 mg/g. The negative Gibbs energy values pointed at the feasibility and spontaneous character of the biosorption process. The possible mechanisms of metal ions removal were discussed. Saccharomyces cerevisiae have all necessary characteristics to be applied to the development of the technology of silver-containing effluents treatment.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Yeast—As Bioremediator of Silver-Containing Synthetic Effluents

et al. 2023

View full text Add to dashboard Cite

show abstract

“…MT3 biosorbent has a higher desorption capacity and is used in more cycles than various biosorbents where a lower Pb concentration was applied (Gong et al, 2005, Kumari et al, 2017, Huang & Liu, 2013). Ibrahim et al (2022) reported that immobilized S. cerevisiae desorbed 100‐mg L −1 Pb by approximately 45%. These studies support our findings.…”

Section: Resultsmentioning

confidence: 99%

Equilibrium, kinetic, and thermodynamic studies on the biosorption of lead by human metallothionein gene‐cloned bacteria as a novel biosorbent

Akkurt,

Uçkun,

Oğuz

et al. 2024

Water Environment Research

View full text Add to dashboard Cite

Heavy metals are the main pollutants in water and are an important global problem that threatens human health and ecosystems. In recent years, there has been an increasing interest in the use of genetically modified bacteria as an eco‐friendly method to solve heavy metal pollution problems. The goal of this study was to generate genetically modified Escherichia coli expressing human metallothioneins (hMT2A and hMT3) and to determine their tolerance, bioaccumulation, and biosorption capacity to lead (Pb2+). Recombinant MT2A and MT3 strains expressing MT were successfully generated. Minimum inhibition concentrations (MIC) of Pb for MT2A and MT3 were found to be 1750 and 2000 mg L−1, respectively. Pb2+ resistance and bioaccumulation capacity of MT3 were higher than MT2A. Therefore, only MT3 biosorbent was used in Pb2+ biosorption, and its efficiency was examined by performing experiments in a batch system. Pb2+ biosorption by MT3 was evaluated in terms of isotherms, kinetics, and thermodynamics. The results showed that Pb biosorption fits to the Langmuir isotherm model and the pseudo‐first‐order kinetic model, and the reaction is exothermic. The maximum Pb2+ capacity of the biosorbent was 50 mg Pb2+g−1. The potential of MT3 in Pb biosorption was characterized by Fourier‐transform infrared spectroscopy (FT‐IR), scanning electron microscopy (SEM), and scanning transmission electron microscopy (STEM) analyses. The desorption study showed that the sorbent had up to 74% recovery and could be effectively used four times. These findings imply that this biosorbent can be applied as a promising, precise, and effective means of removing Pb2+ from contaminated waters.Practitioner Points In this study, the tolerance levels, bioaccumulation, and biosorption capacities of Pb in aqueous solutions were determined for the first time in recombinant MT2A and MT3 strains in which human MT2A and MT3 genes were cloned. The biosorbent of MT3, which was determined to be more effective in Pb bioaccumulation, was synthesized and used in Pb biosorption. The Pb biosorption mechanism of MT3 biosorbent was identified using isotherm modeling, kinetic modeling, and thermodynamic studies. The maximum Pb removal percentage capacity of the biosorbent was 90%, whereas the maximum biosorption capacity was up to 50 mg Pb2+g−1. These results indicated that MT3 biosorbent has a higher Pb biosorption capacity than existing recombinant biosorbents. MT3 biosorbent can be used as a promising and effective biosorbent for removing Pb from wastewater.

show abstract

“…A green approach to wastewater treatment is explored in the paper: Simultaneous Removal of Metal Ions from Wastewater by a Greener Approach [48]. The research emphasizes the significance of sustainable and environmentally friendly methods for metal ion removal from contaminated water sources.…”

Section: Materials Methods and Resultsmentioning

confidence: 99%