Heavy Metal Biosorption by Marine Cyanobacteria: A Green Biotechnology to Remove Heavy Metals from Wastewaters and to Obtain Metal-Organic Materials DOI
Matilde Ciani, Francesca Decorosi, Claudio Ratti

et al.

Published: Jan. 1, 2023

Exopolysaccharide-producing cyanobacteria represent an eco-friendly tool for heavy metal (HM) biosorption due to the presence of negatively charged groups in exopolysaccharidic fractions that can act as binding sites positively metals. Specifically, marine have received increasing attention production attractive metabolites well advantages their cultivation (lower contamination risk, seawater use). In this work, we evaluated performances three and a consortium cyanobacteria, Cu, Ni, Zn biosorption. This process was studied by adopting confined systems whole cultures order exploit also polysaccharides released medium favor both collection metal-organic materials at end bioremoval process.We found strain metal-specific effect. All revealed stronger affinity mono three-metal systems. Namely, highest specific uptake shown 16Som2 culture, corresponding 83.9 mg Cu g-1 DW, followed VI 22M, CE 4, ET 5 cultures. The efficiency observed when biomass diluted dilution values suggesting too concentrated biosorbents reduce HM-specific uptake. Also, carbohydrate content had role Despite 22M produced higher amount carbohydrates, 4 showed Ni expressed removed per gram total carbohydrate. Langmuir isotherm greatly explained adsorption whereas Freundlich resulted suited describe 5, 4. On contrary, two models were not suitable explain adsorption.This is proposed couple bioremediation obtainment may be exploited high-value compounds, thus, economic sustainability process.

Language: Английский

Cyanoremediation and phyconanotechnology: cyanobacteria for metal biosorption toward a circular economy DOI Creative Commons
Matilde Ciani, Alessandra Adessi

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: May 30, 2023

Cyanobacteria are widespread phototrophic microorganisms that represent a promising biotechnological tool to satisfy current sustainability and circularity requirements. They potential bio-factories of wide range compounds can be exploited in several fields including bioremediation nanotechnology sectors. This article aims illustrate the most recent trends use cyanobacteria for bioremoval (i.e., cyanoremediation) heavy metals metal recovery reuse. Heavy biosorption by combined with consecutive valorization obtained metal-organic materials get added-value compounds, nanoparticles, opening field phyconanotechnology. It is thus possible approaches could increase environmental economic feasibility cyanobacteria-based processes, promoting transition toward circular economy.

Language: Английский

Citations

20
Bacillus coagulans XY2 ameliorates copper-induced toxicity by bioadsorption, gut microbiota and lipid metabolism regulation DOI
Yufang Gao, Ting Yu, Fang Ai

et al.

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 445, P. 130585 - 130585

Published: Dec. 9, 2022

Language: Английский

Citations

16
Semi-continuous cultivation of EPS-producing marine cyanobacteria: A green biotechnology to remove dissolved metals obtaining metal-organic materials DOI Creative Commons
Matilde Ciani, Francesca Decorosi, Claudio Ratti

et al.

New Biotechnology, Journal Year: 2024, Volume and Issue: 82, P. 33 - 42

Published: May 5, 2024

Given the necessity for bioprocesses scaling-up, present study aims to explore potential of three marine cyanobacteria and a consortium, cultivated in semi-continuous mode, as green approach i) continuous exopolysaccharide-rich biomass production ii) removal positively charged metals (Cu, Ni, Zn) from mono multi-metallic solutions. To ensure effectiveness both cellular released exopolysaccharides, weekly harvested whole cultures were confined dialysis tubings. The results revealed that all tested have stronger affinity towards Cu three-metal systems. Despite amount removed per gram decreased with higher biosorbent dosage, more soluble carbohydrates produced, greater was metal uptake, underscoring pivotal role exopolysaccharides biosorption. According this, Dactylococcopsis salina 16Som2 showed highest carbohydrate productivity (142 mg L

Language: Английский

Citations

3
Transition Metal‐Catalyzed Transformations of Chalcones DOI
Clementina M.M. Santos, Artur M. S. Silva

The Chemical Record, Journal Year: 2024, Volume and Issue: 24(8)

Published: July 15, 2024

Chalcones are a class of naturally occurring flavonoid compounds associated to variety biological and pharmacological properties. Several reviews have been published describing the synthesis properties vast array analogues. However, overviews on reactivity chalcones has only explored in few accounts. To fill this gap, systematic survey most recent developments transition metal-catalyzed transformation was performed. The chemistry copper, palladium, zinc, iron, manganese, nickel, ruthenium, cobalt, rhodium, iridium, silver, indium, gold, titanium, platinum, among others, as versatile catalysts will be highlighted, covering literature from year 2000 2023, more than 380 publications.

Language: Английский

Citations

2
Ni2+ and Cu2+ Biosorption by EPS-Producing Serratia plymuthica Strains and Potential Bio-Catalysis of the Organo–Metal Complexes DOI Open Access

Rocco Zanetti,

Sarah Zecchin,

Milena Colombo

et al.

Water, Journal Year: 2022, Volume and Issue: 14(21), P. 3410 - 3410

Published: Oct. 27, 2022

In this study, a biosorption system for nickel (Ni2+) and copper (Cu2+) removal by selected exopolymeric substance-producing bacterial strains was evaluated from the perspective of water remediation. A preliminary screening in biofilm-based filtration allowed selection two best-performing Serratia plymuthica specific Ni2+ Cu2+ synthetic solutions, as well definition optimal growth conditions. Further tests were conducted planktonic cell order to evaluate: (i) effect contact time, (ii) initial metal concentration, (iii) biomass dose. S. strain SC3I(2) able remove 89.4% 50 mg L−1 solution, showed maximum capacity 33.5 g−1, while As3-5a(5) removed up 91.5% 200 yielding 80.5 g−1. Adsorption equilibria both metals reached within 30 min, most process occurring first 2–4 min. Only data adequately described Langmuir Freundlich isothermal models, part subjected complexation on substances. The capability substances stably coordinate transition offers possibility eco-friendly re-use these new hybrid systems catalysts application addition reaction B2(pin)2 α,β-unsaturated chalcones with good results. formed instead transfer hydrogenation imines. performances indicate that they have potential be exploited bioremediation technologies obtained organo–metal complexes might valorized biocatalytic purposes.

Language: Английский

Citations

4
Bacterial exopolysaccharides for heavy metals and toxic dye removal: biosynthesis, mechanism, and remediation strategies DOI
Asmaa M. Mogazy

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 15 - 27

Published: Oct. 13, 2023

Language: Английский

Citations

2
Heavy Metal Biosorption by Marine Cyanobacteria: A Green Biotechnology to Remove Heavy Metals from Wastewaters and to Obtain Metal-Organic Materials DOI
Matilde Ciani, Francesca Decorosi, Claudio Ratti

et al.

Published: Jan. 1, 2023

Exopolysaccharide-producing cyanobacteria represent an eco-friendly tool for heavy metal (HM) biosorption due to the presence of negatively charged groups in exopolysaccharidic fractions that can act as binding sites positively metals. Specifically, marine have received increasing attention production attractive metabolites well advantages their cultivation (lower contamination risk, seawater use). In this work, we evaluated performances three and a consortium cyanobacteria, Cu, Ni, Zn biosorption. This process was studied by adopting confined systems whole cultures order exploit also polysaccharides released medium favor both collection metal-organic materials at end bioremoval process.We found strain metal-specific effect. All revealed stronger affinity mono three-metal systems. Namely, highest specific uptake shown 16Som2 culture, corresponding 83.9 mg Cu g-1 DW, followed VI 22M, CE 4, ET 5 cultures. The efficiency observed when biomass diluted dilution values suggesting too concentrated biosorbents reduce HM-specific uptake. Also, carbohydrate content had role Despite 22M produced higher amount carbohydrates, 4 showed Ni expressed removed per gram total carbohydrate. Langmuir isotherm greatly explained adsorption whereas Freundlich resulted suited describe 5, 4. On contrary, two models were not suitable explain adsorption.This is proposed couple bioremediation obtainment may be exploited high-value compounds, thus, economic sustainability process.

Language: Английский

Citations

0