Exploring Aspergillus biomass for fast and effective Direct Black 22-dye removal DOI Creative Commons
Anna Gabrielly Duarte Neves, Raphael Luiz Andrade Silva, Kethylen Bárbara Barbosa Cardoso

et al.

Revista Brasileira de Ciências Ambientais, Journal Year: 2024, Volume and Issue: 59

Published: Nov. 5, 2024

Azo dyes are widely used in the textile industry due to their stability and resistance. These properties also make them recalcitrant xenobiotics, toxic, mutagenic, carcinogenic, even at low concentrations. Considered emerging pollutants, there is an urgency address mechanisms capable of remediating these contaminants, with Aspergillus fungi standing out as effective solution. Fifteen strains were investigated for decolorization tetra azo dye Direct Black 22. The influence different culture media was evaluated on biomass production, concentrations (50–300 mg/L), (1–5g), reuse continuous batches. that stood most japonicus URM 5620, niger 5741, A. 5838. Obtaining less nutrient-rich medium favored by forming more organized pellets. live 59% efficient than dead biomass. efficiency not affected lower concentrations, showing a decrease only when concentration reached 300 mg/L. Increasing amount resulted proportionally greater decolorization. Even just 1 g biomass, three could remove 90% 60 minutes, 5 g, completely removed 10 minutes. Thebiomass reused consecutive cycles, fungus best withstood cycles 5741. results demonstrate potential genus tested this study sustainable biosorbents remediation such 22, colored industrial effluent treatment.

Language: Английский

Biosorption of Hexavalent Chromium by Bacillus megaterium and Rhodotorula sp. Inactivated Biomass DOI Open Access
Mihaela Roșca, Bruna Silva, Teresa Tavares

et al.

Processes, Journal Year: 2023, Volume and Issue: 11(1), P. 179 - 179

Published: Jan. 6, 2023

Due to the adverse effects of hexavalent chromium (Cr6+) on human health and quality environment, scientific community has invested a lot effort solve this pollution problem. Thus, implementing sustainable alternatives for Cr6+ elimination by exploiting capacity microbial biomass retain heavy metals biosorption is considered an economic eco-friendly solution, compared conventional physico-chemical processes. However, ability microorganisms remove from liquid effluents can strongly be affected biotic abiotic factors. With these issues in mind, main purpose paper was investigate Bacillus megaterium Rhodotorula sp. inactivated thermal treatments, exploring some factors such as: pH, biosorbent dose, initial concentration metal temperature contact time between ions process effectiveness. The results showed that removal selected influenced pH solution which contains chromium, reduction being principal mechanism involved biosorption. Equilibrium kinetic studies were also performed, together with SEM-EDX FTIR spectra, explain mechanisms biomasses. Maximum uptake capacities 34.80 mg/g 47.70 achieved sp., respectively, at 1, dosage 8 g/L, 25 °C, after 48 h 402.52 mg/L. experimental followed Elovich model, values correlation coefficients 0.9868 0.9887, respectively. Freundlich isotherm model best describes indicating multilayer mainly controls conducted heterogeneous surfaces uniformly distributed energy.

Language: Английский

Citations

12
Bio-Recovery of Metals through Biomining within Circularity-Based Solutions DOI Open Access
Petronela Cozma, Camelia Bețianu, Raluca Maria Hlihor

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(9), P. 1793 - 1793

Published: Aug. 23, 2024

Given the current highest demand in history for raw materials, there is a growing recovery of key metals from secondary sources, order to prevent metal depletion and reduce risk toxic discharges into environment. This paper focuses on nature-based solutions (i.e., biomining bioleaching) applied resource (metals) solid matrices. Biomining exploits potential microorganisms facilitate extraction wide range waste materials as an interesting alternative, replacing primary with material resources (thus improving recycling rates context circular economy). Special attention was paid analysis process sustainability perspective. In this regard, several supporting tools (e.g., life cycle assessment, LCA), developed assist decision-makers complex assessing scaling-up remediation projects (including biomining), were discussed. The application LCA still evolving, requires comprehensive case studies improve methodological approach. review outlines fact that few have focused demonstrating environmental performance process. Also, further should be performed promote commercial opportunities biomining, which can used recover recycle matrices site remediation. Despite some important disadvantages (poor kinetics; toxicity), considered cleaner approach than conventional mining processes. However, implementing it large scale improvements regulatory issues public acceptance.

Language: Английский

Citations

2
Mathematical Modeling of Microbial Bioremediation DOI
Mihaela Roșca, Petronela Cozma, Maria Gavrilescu

et al.

Advances in environmental engineering and green technologies book series, Journal Year: 2024, Volume and Issue: unknown, P. 100 - 134

Published: March 11, 2024

Biosorption is a method that holds great promise for environmental bioremediation. However, the process mechanism not yet fully comprehended as it relies heavily on characteristics of biosorbent, properties pollutants, and operational conditions. The knowledge understanding sorption kinetics mechanisms are critical design scaling up biosorption. Applying proper models methods in evaluation heavy metals biosorption can elucidate mechanisms, analyze experimental data, predict outcomes, optimize processes. After brief analysis literature field biosorption, has been found most valuable provide information about kinetics, maximum capacity thermodynamics. Additionally, preferred studying interactive effects variables creating precise mathematical model describes accurately highly sought after. Thus, main purpose chapter consists exposing available be applied all factors could affect metals. isotherms, kinetic thermodynamic models, well statistical tools suitable evaluating were presented, with special emphasis their application, advantages, disadvantages.

Language: Английский

Citations

1
Comparative Analysis of Three WEEE Management Scenarios Based on LCA Methodology: Case Study in the Municipality of Iasi, Romania DOI Open Access

Simona Cecilia Ghiga,

Isabela Maria Simion, Cătălina Filote

et al.

Processes, Journal Year: 2023, Volume and Issue: 11(5), P. 1305 - 1305

Published: April 23, 2023

The increasing consumption of electrical and electronic equipment (EEE), correlated with the fast innovation pace in this field, generates a large amount annual waste. current established management practices cannot keep up it, results are increased significance given negative effects on environment human health. Thus, study aimed to analyze environmental impact three different scenarios waste (WEEE) management, following population awareness campaigns regarding its collection Municipality Iasi, Romania. Data processing was carried out considering Life Cycle Assessment (LCA) methodology functional unit for each scenario according collected amount. were quantified using CML2001 ReCiPe methods showed that highest obtained II (S2) (1.59 × 10−7 pers. equiv. method 32.7 method), while lowest I (S1) (6.42 10−8 13.8 method). process contribution total stage all scenarios, exception S2, which case value generated landfill application (39.93%). provides critical issue area supports development sustainable WEEE processes.

Language: Английский

Citations

3
Exploring the microbial dynamics for heavy metals bioremediation in the industrial wastewater treatment: A critical review DOI Creative Commons

H Malathi,

Pooja Sharma

Novel Research in Microbiology Journal, Journal Year: 2023, Volume and Issue: 7(4), P. 2034 - 2047

Published: July 1, 2023

The purpose of this review article was to provide a concise overview the current researches on topic in-situ microbial remediation heavy metals (HM) in industrial wastewater. Due ever-expanding sector; groundwater contamination by HM is global environmental crisis. Heavy metals; pollution, and adaptive mechanisms that allow bacteria thrive metal-contaminated environments, have all been linked dramatic shifts diversity, which are observed during restoration. It has suggested situ bioremediation (ISB) can help with emerging problems; as be used clean up polluted areas. In future, researchers should pay more attention assessment methodologies for determining success using ISB technology. Bio-remediation only effective if area properly characterized; appropriate species chosen, harmful easily accessible absorption. This new technology uses remove from environment at low cost. study analyzes effectiveness microorganisms; unique integrated methods. addition providing an pollutant(s) elimination; useful comprehending primary functions microorganisms process.

Language: Английский

Citations

2
Exploring Aspergillus biomass for fast and effective Direct Black 22-dye removal DOI Creative Commons
Anna Gabrielly Duarte Neves, Raphael Luiz Andrade Silva, Kethylen Bárbara Barbosa Cardoso

et al.

Revista Brasileira de Ciências Ambientais, Journal Year: 2024, Volume and Issue: 59

Published: Nov. 5, 2024

Azo dyes are widely used in the textile industry due to their stability and resistance. These properties also make them recalcitrant xenobiotics, toxic, mutagenic, carcinogenic, even at low concentrations. Considered emerging pollutants, there is an urgency address mechanisms capable of remediating these contaminants, with Aspergillus fungi standing out as effective solution. Fifteen strains were investigated for decolorization tetra azo dye Direct Black 22. The influence different culture media was evaluated on biomass production, concentrations (50–300 mg/L), (1–5g), reuse continuous batches. that stood most japonicus URM 5620, niger 5741, A. 5838. Obtaining less nutrient-rich medium favored by forming more organized pellets. live 59% efficient than dead biomass. efficiency not affected lower concentrations, showing a decrease only when concentration reached 300 mg/L. Increasing amount resulted proportionally greater decolorization. Even just 1 g biomass, three could remove 90% 60 minutes, 5 g, completely removed 10 minutes. Thebiomass reused consecutive cycles, fungus best withstood cycles 5741. results demonstrate potential genus tested this study sustainable biosorbents remediation such 22, colored industrial effluent treatment.

Language: Английский

Citations

0