Using Spirulina platensis as a natural biocoagulant for polystyrene removal from aqueous medium: performance, optimization, and modeling

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Jan. 30, 2024

Microplastics (MPs) are newly recognized contaminants that result from the breakdown of plastics released into aquatic environments. This study focuses on elimination polystyrene (PS) using S. platensis, a natural biocoagulant, aqueous solutions. The research investigated several crucial variables, including initial level PS ranging 100 to 900 mg L

Language: Английский

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Removal of microplastics by algal biomass from aqueous solutions: performance, optimization, and modeling

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 2, 2025

Microplastics (MPs) are emerging pollutants that pose significant risks to ecosystems due their inherent toxicity, capacity accumulate various pollutants, and potential for synergistic impacts. Given these concerns, the focus of this research is on critical need effective MPs removal from aquatic environments. Using BBD method, study aimed identify key parameters affecting by algal biomass aqueous solutions. The investigation specifically analyzed effects varying initial PS concentrations (100 900 mg/L), pH values (4 10), reaction durations (20 40 min), C. vulgaris dosages (50 400 mg/L). Data analysis indicated QM best described experimental findings, leading identification optimal conditions removal: a 7.5, time 31.90 min, dosage 274.05 mg/L, level 789.37 mg/L. Under conditions, achieved maximum efficiency 73.01% PS. These outcomes demonstrate in efficiently removing water. Furthermore, using algae as green, eco-friendly alternative conventional chemical coagulants offers practical sustainable approach addressing pollution our water systems.

Language: Английский

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Adsorption of tetracycline on polyvinyl chloride microplastics in aqueous environments

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Oct. 20, 2023

Abstract Microplastics (MPs), as carriers of organic pollutants in the environment, have become a growing public concern recent years. Tetracycline (TTC) is an antibiotic that can be absorbed by MPs and harmful effect on human health. Therefore, this study was conducted with aim investigating adsorption rate TTC onto polyvinyl chloride (PVC) MPs. In addition, mechanism process studied using isothermal, kinetic, thermodynamic models. For purpose, experimental runs Box-Behnken model were designed to investigate main research parameters, including PVC dose (0.5–2 g/L), reaction time (5–55 min), initial concentration (5–15 mg/L), pH (4–10). Based findings, highest (93.23%) obtained at 10, contact 55 min, adsorbent 1.25 g/L, 10 mg/L. The found followed pseudo-second-order Langmuir Thermodynamic data indicated spontaneous, exothermic, physical. Increasing ion decreased adsorption, distilled water had while municipal wastewater lowest adsorption. These findings provide valuable insights into behavior pollutants, underscoring importance conducting additional implementing measures mitigate their detrimental effects health environment.

Language: Английский

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Use of Saccharomyces cerevisiae as new technique to remove polystyrene from aqueous medium: modeling, optimization, and performance

Applied Water Science, Journal Year: 2023, Volume and Issue: 13(8)

Published: July 26, 2023

Abstract MPs are widely found in various environments. PS is the second most common microplastic sediments, freshwater, soil, and coastal ecosystems. S. cerevisiae was studied as a biocoagulant due to its advantages such ease of use, non-toxicity, large-scale cultivability low cost. The aim this study evaluate efficiency removing from aqueous solutions. BBD used determine optimal removal conditions. were washed, dried, crushed, sieved, kept closed container avoid exposure light moisture. measured under parameters dose (100–300 mg/L), concentration (200–900 pH (4–10). suspension stirred subjected variable speeds disperse yeast cells contact with particles. formed clots settled static conditions, suspended solution by filtering through Whatman filter paper recording weight after drying. maximum 98.81% optimized i.e., 550 mg/L, 200 7. With regard mentioned results, it can be said that natural environmentally friendly remove PS.

Language: Английский

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Recent progress on the toxic effects of microplastics on Chlorella sp. in aquatic environments

Heliyon, Journal Year: 2024, Volume and Issue: 10(12), P. e32881 - e32881

Published: June 1, 2024

Microplastics (MPs) are emerging contaminants that have harmful effects on ecosystems. Microalgae important primary producers in aquatic environments, providing nutrients for various organisms. These microorganisms may be affected by MPs. Therefore, it is to investigate the toxicity aspects of different MPs Chlorella species. It can seen BG-11 culture medium was most commonly used 40 % studies growth sp. grows optimally at a temperature 25 °C and pH 7. Most show grow range 3000–6000 lux. Moreover, techniques been analyze morphological properties studies. included scanning electron microscopy (SEM), Fourier transform infrared (FTIR), transmission (TEM), which were 65 %, 35 27 studies, respectively. 53 research has focused toxic PS Findings 41 investigated concentrations 10–100 mg/L, followed 32 100–1000 mg/L. The found spherical shape 45 cases. enzymes superoxide dismutase (SOD) Malondialdehyde (MDA), accounting 48 each. Additionally, exposure increased activity such as SOD MDA. In general, concluded had relatively high negative effect

Language: Английский

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Effects of partial replacement of fishmeal with Spirulina platensis powder and addition of Spirulina platensis polysaccharide on growth, nutrition, antioxidant capacity and gut microbiota of Micropterus salmoides

Aquaculture, Journal Year: 2024, Volume and Issue: 586, P. 740802 - 740802

Published: March 11, 2024

Language: Английский

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Polyethylene microplastics as adsorbent of diazinon in aqueous environments: optimization, and modeling, isotherm, kinetics, and thermodynamic studies

Applied Water Science, Journal Year: 2024, Volume and Issue: 14(7)

Published: June 5, 2024

Abstract MPs have raised significant public concern due to their role as carriers of organic contaminants in aqueous solutions. DZN is a non-systemic organophosphorus pesticide that poses risks human and environmental health. This study aimed investigate the adsorption onto PE by examining factors such dose, reaction time, concentration, pH through experimental runs based on Box‒Behnken model. According Langmuir model, maximum capacity for was 0.35 mg/g. The results indicated highest rate (92%) observed distilled water, while lowest (57%) municipal wastewater. Δ H ° S values were obtained − 0.16 kJ/mol 54.41 J/(mol K), respectively. Therefore, regarding negative G values, it can be concluded an exothermic, highly disordered, spontaneous process. findings indicate reduction concentrations interfering compounds increase. These offer understanding interaction between contaminants, emphasizing need further studies approaches reduce harmful impact health environment.

Language: Английский

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Utilizing Chlorella vulgaris algae as an eco-friendly coagulant for efficient removal of polyethylene microplastics from aquatic environments

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e22338 - e22338

Published: Nov. 1, 2023

Polyethylene (PE) microplastics (MPs) are small particles of plastic made from polyethylene, which is a commonly used type plastic. These can be found in water sources, such as rivers, lakes, and oceans. They typically less than 5 mm size. Chlorella vulgaris (C. vulgaris) an excellent, simple inexpensive biocoagulant that effectively remove wide range pollutants through the coagulation flocculation mechanism. In this study, C. algae were to PE MPs. The experiments designed using Behnken Box model. evaluated parameters initial concentration (100-400 mg/L), dose (50-200), pH (4-10). findings showed increasing polyethylene had positive effect on efficiency removal. addition, inversely directly related removal efficiency, respectively. highest was observed under alkaline conditions. Overall, maximum 84 % when 250 mg/L, 50 10. It concluded environmentally friendly coagulant for removing MPs aquatic environments.

Language: Английский

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Algal strains, treatment systems and removal mechanisms for treating antibiotic wastewater by microalgae

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 56, P. 104266 - 104266

Published: Sept. 15, 2023

Language: Английский

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Parametric study and process modeling for metronidazole removal by rhombic dodecahedron ZIF-67 crystals

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: Sept. 5, 2023

Metronidazole (MNZ) is an extensively used antibiotic against bacterial infections for humans and farm animals. Prevention of antibiotics discharge essential to prevent adverse environmental health impacts. A member metal-organic frameworks, zeolite imidazole framework-67 with cobalt sulfate precursor (ZIF-67-SO4) exceptional physio-chemical properties was prepared via room temperature precipitation adsorb MNZ. The study framework designed by Box-Behnken Design evaluate the effect pH, ZIF-67-SO4 dose, contact time on adsorption efficiency. polynomial model fitted system indicated optimal condition 97% MNZ removal occurs at pH = 7, adsorbent dosage 1 g/L, mixing 60 min. also revealed that increased decreased strong pH. Equilibrium kinetic followed intra-particle diffusion Langmuir isotherm a qmax 63.03 mg/g. insignificant loss in efficacy use-reuse cycles reflected practical viability ZIF-67-SO4.

Language: Английский

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