Efficient Lead Pb(II) Removal with Chemically Modified Nostoc commune Biomass

Lavado-Meza, Carmencita; Cruz-Cerrón, Leonel De la; Lavado-Puente, Carmen; Suazo, Julio Angeles; Dávalos, Juan Z.

doi:10.3390/molecules28010268

Cited by 11 publications

(6 citation statements)

References 51 publications

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“…Thus, at solution pH higher than pH pzc = 6.25, the biomass surface will be negatively charged, facilitating the interaction with positive species, while at pH lower than this value, the behaviour of the solid surface will be the opposite. Lower or similar values can be found in the literature for other biomasses used for Pb biosorption: blue-green algae (pH pzc 1.3) [77], corncobactivated carbon (pH pzc 3.8) [78], nanche stone (pH pzc 6) [80], mixture of coffee grounds and orange barks residues (pH pzc 5.2) [87], olive stone (pH pzc 6.61) [88] or untreated and alkaline-treated apricot shell (pH pzc 4.9 and 5.7, respectively) [89].…”

Section: Sorbent Characterisationsupporting

confidence: 81%

“…Carboxylic groups (1.216 ± 0.012 mmol g −1 ) were predominant compared to phenolic (0.035 ± 0.013 mmol g −1 ) and lactonic groups (0.006 ± 0.013 mmol g −1 ). Other biomasses recently used for Pb removal showed higher values for acid groups such as blue-green algae (ag: 0.52/bg: 0.02 mmol g −1 ) [77], corncob-activated carbon (ag: 1.22/bg: 0.57 mmol g −1 ) [78], olive stone (ag: 0.96/bg: 0.41 mmol g −1 ), pine nut shell biochar (ag: 0.206-0.266/bg: 0.020-0.029 mmol g −1 ) [79] or nanche stone (ag: 0.1037/bg: 0.046 mmol g −1 ) [80]. The carboxylic groups are Pearson hard basic sites on the biomass surface, while Pb(II) is a borderline softer acid ion [81].…”

Section: Sorbent Characterisationmentioning

confidence: 99%

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Ecofriendly Application of Calabrese Broccoli Stalk Waste as a Biosorbent for the Removal of Pb(II) Ions from Aqueous Media

Granado-Castro,

Galindo-Riaño,

Gestoso-Rojas

et al. 2024

Agronomy

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A new biosorbent obtained from Calabrese broccoli stalks has been prepared, characterised and used as an effective, low-cost and ecofriendly biomass to remove Pb(II) from aqueous solutions, without any complicated pretreatment. Structural and morphological characterisation were performed by TGA/DGT, FTIR and SEM/EDX; the main components are hemicellulose, starches, pectin, cellulose, lignin and phytochemicals, with important electron donor elements (such as S from glucosinolates of broccoli) involved in Pb(II) sorption. The biosorbent showed values of 0.52 and 0.65 g mL−1 for bulk and apparent densities, 20.6% porosity, a specific surface area of 15.3 m2 g−1, pHpzc 6.25, iodine capacity of 619 mg g−1 and a cation exchange capacity of 30.7 cmol kg−1. Very good sorption (88.3 ± 0.8%) occurred at pH 4.8 with a biomass dose of 10 g L−1 after 8 h. The Freundlich and Dubinin–Radushkevich isotherms and the pseudo-second-order kinetic models explained with good fits the favourable Pb(II) sorption on the heterogeneous surface of broccoli biomass. The maximum adsorption capacity was 586.7 mg g−1. The thermodynamic parameters evaluated showed the endothermic and spontaneous nature of the Pb(II) biosorption. The chemical mechanisms mainly involved complexation, ligand exchange and cation–π interaction, with possible precipitation.

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Section: Sorbent Characterisationsupporting

confidence: 81%

Section: Sorbent Characterisationmentioning

confidence: 99%

Ecofriendly Application of Calabrese Broccoli Stalk Waste as a Biosorbent for the Removal of Pb(II) Ions from Aqueous Media

Granado-Castro,

Galindo-Riaño,

Gestoso-Rojas

et al. 2024

Agronomy

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“…At this point, a lower diffusion kinetic constant (k id2 ) and a thicker boundary layer ( C 2 ) are measured, indicating slower kinetics at the later stages of sorption. The Pb(II) sorption kinetics by other biomaterials, such as Lupinus albus Seed Hull ( k id of 0.09) and NaOH-modified Nostoc commune cyanobacteria ( k id of 7.4), also exhibited multistage IPD-type sorption behavior, indicating that the hierarchical nature of the biomaterial networks results in the intraparticle diffusion mechanism as the rate-limiting step, especially at high heavy metal concentrations.…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal Remediation by Dry Mycelium Membranes: Approaches to Sustainable Lead Remediation in Water

Parasnis,

Deng,

Yuan

et al. 2024

Langmuir

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Lead contamination poses significant and lasting health risks, particularly in children. This study explores the efficacy of dried mycelium membranes, distinct from live fungal biomass, for the remediation of lead (Pb(II)) in water. Dried mycelium offers unique advantages, including environmental resilience, ease of handling, biodegradability, and mechanical reliability. The study explores Pb(II) removal mechanisms through sorption and mineralization by dried mycelium hyphae in aqueous solutions. The sorption isotherm studies reveal a high Pb(II) removal efficiency, exceeding 95% for concentrations below 1000 ppm and ∼63% above 1500 ppm, primarily driven by electrostatic interactions. The measured infrared peak shifts and the pseudosecond-order kinetics for sorption suggests a correlation between sorption capacity and the density of interacting functional groups. The study also explores novel surface functionalization of the mycelium network with phosphate to enhance Pb(II) removal, which enables remediation efficiencies >95% for concentrations above 1500 ppm. Scanning electron microscopy images show a pH-dependent formation of Pb-based crystals uniformly deposited throughout the entire mycelium network. Continuous cross-flow filtration tests employing a dried mycelium membrane demonstrate its efficacy as a microporous membrane for Pb(II) removal, reaching remediation efficiency of 85−90% at the highest Pb(II) concentrations. These findings suggest that dried mycelium membranes can be a viable alternative to synthetic membranes in heavy metal remediation, with potential environmental and water treatment applications.

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“…On the other hand, the R 2 value of the pseudo-second-order kinetic model was greater than 0.99; moreover, the expected q e (5.794 mg/g) was very close to the experimental q max (5.788 mg/g) (Table 4; Figure 8B). These results suggest that Co(II) ion biosorption on algal biomass depends on chemical adsorption, including electron exchange between Co(II) ions and algal biomass, as covalent forces and ion exchange, where Co(II) ions are bound to the surface of algal biomass by chemical bonding [69]. As shown in FT-IR data, the binding sites on the P. pavonica biomass surface include abundant groups like hydroxyl and carboxyl, providing a good possibility for chemisorption.…”

Section: Kinetic Model For Biosorptionmentioning

confidence: 92%

Model-Assisted Optimization of Cobalt Biosorption on Macroalgae Padina pavonica for Wastewater Treatment

Aloufi,

Al Riyami,

Fawzy

et al. 2024

Water

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The release of heavy metals into the environment as a result of industrial and agricultural activities represents one of the century’s most significant issues. Cobalt is a hazardous metal that is employed in a variety of industries. In this study, response surface methodology (RSM) combined with Box–Behnken design (BBD) was utilized to optimize the Co(II) ion removal from synthetic wastewater by the brown macroalga Padina pavonica. The influence of three factors, namely algal inoculum size, pH, and initial metal concentration, was assessed in optimization studies. RSM proposed a second-order quadratic model with a p-value of <0.0001 and R2 of 0.984 for P. pavonica. According to the data related to RSM optimization, the maximum percentage of Co(II) removal of 84.3% was attained under the conditions of algal inoculum size of 5.98 g/L, pH of 6.73, and initial Co(II) concentration of 21.63 mg/L. The experimental data from the biosorption process were fitted well with the Langmuir, Freundlich, and Temkin isotherm models. The maximal Co(II) adsorption capacity was estimated using the Langmuir model to be 17.98 mg/g. Furthermore, the pseudo-second-order kinetic model was shown to have the best fit for Co biosorption by P. pavonica, showing that the mechanism of Co(II) biosorption was chemisorption controlled by surface biosorption and intra-particle diffusion. Thermodynamic parameters were also investigated to evaluate the Gibbs free energy for the Co(II) ion, which was positive, showing that the biosorption process is nonspontaneous and exothermic, and the cobalt biosorption rate decreases with increasing temperature. Algal biomass was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy. These analyses revealed the biosorbent’s diverse functional groups and porous, rough appearance. Therefore, P. pavonica can be used to implement sustainable, eco-friendly, and acceptable solutions to water pollution problems.

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Efficient Lead Pb(II) Removal with Chemically Modified Nostoc commune Biomass

Cited by 11 publications

References 51 publications

Ecofriendly Application of Calabrese Broccoli Stalk Waste as a Biosorbent for the Removal of Pb(II) Ions from Aqueous Media

Ecofriendly Application of Calabrese Broccoli Stalk Waste as a Biosorbent for the Removal of Pb(II) Ions from Aqueous Media

Heavy Metal Remediation by Dry Mycelium Membranes: Approaches to Sustainable Lead Remediation in Water

Model-Assisted Optimization of Cobalt Biosorption on Macroalgae Padina pavonica for Wastewater Treatment

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