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61,005 resultsShowing papers similar to Mechanisms of microorganisms and environmentally persistent free radicals in biochar/PMS degradation of antibiotics after the aging process of fermentation
ClearEffect of aged biochar after microbial fermentation on antibiotics removal: Key roles of microplastics and environmentally persistent free radicals
Researchers prepared biochar from sludge containing varying amounts of polystyrene and tested its ability to remove antibiotics after microbial aging. The study found that while aging reduced biochar's surface area and removal efficiency by 6-14%, increasing the polystyrene content actually improved antibiotic removal due to the positive effects of environmentally persistent free radicals.
Effects of excess sludge composting process, environmentally persistent free radicals, and microplastics on antibiotics degradation efficiency of aging biochar
Researchers examined how microplastics (specifically polystyrene) added to sewage sludge affect a biochar's long-term ability to degrade antibiotics in compost environments. After composting, the antibiotic-degrading efficiency of biochar decreased — and decreased more when polystyrene microplastics were present — primarily because composting reduced the reactive free radicals that drive antibiotic breakdown. This matters because biochar is increasingly proposed as a tool for removing antibiotic contaminants from waste streams, and microplastic co-contamination of sludge could undermine this function over time.
Influence of microplastics and environmentally persistent free radicals on the ability of biochar components to promote degradation of antibiotics by activated peroxymonosulfate
Researchers investigated how microplastics and environmentally persistent free radicals (EPFRs) together influence the activity of soil enzymes, finding that combined exposure produced greater inhibition of dehydrogenase and urease activity than either contaminant alone. The results indicate EPFRs can amplify the toxic effects of microplastics on soil microbial processes.
Efficient tetracycline hydrochloride degradation via peroxymonosulfate activation by N doped coagulated sludge based biochar: Insights on the nonradical pathway
Researchers found a way to repurpose waste sludge from microplastic removal processes by converting it into a nitrogen-doped carbon material that can break down the antibiotic tetracycline in water. The recycled material performed well across a wide pH range and worked primarily through a nonradical pathway to degrade the antibiotic. The study offers a dual benefit approach that addresses both microplastic waste management and antibiotic contamination in water systems.
Activation of peroxymonosulfate by(sunlight)FeCl3-modified biochar for efficient degradation of contaminants of emerging concern: Comparison with H2O2 and effect of microplastics
Researchers investigated how microplastics affect the ability of iron-modified biochar to break down emerging contaminants in wastewater when activated by peroxymonosulfate and sunlight. Surprisingly, they found that the presence of microplastics actually enhanced the treatment efficiency by up to 42%. The study demonstrates that the coexistence of microplastics and biochar in wastewater can influence the effectiveness of advanced oxidation treatment processes.
Free radicals accelerate in situ ageing of microplastics during sludge composting
Researchers discovered that free radicals generated during sludge composting, including persistent free radicals and reactive oxygen species, significantly accelerate the aging and degradation of microplastics, revealing an overlooked abiotic transformation pathway.
The UltravioletIrradiation Aging Characteristicsof Microplastics in Soil under the Action of Biochar
Researchers investigated how biochar application at four concentrations affects UV-induced aging of both persistent polyethylene microplastics and biodegradable PBAT microplastics in soil, finding that biochar modulates the aging behavior and physicochemical transformation of microplastics under ultraviolet irradiation.
Biochar amendment to advance contaminant removal in anaerobic digestion of organic solid wastes: A review
This review examined how biochar amendment improves anaerobic digestion of organic solid wastes by enhancing biodegradation, reducing inhibitory substances, and facilitating removal of contaminants such as antibiotics, heavy metals, microplastics, and PAHs, proposing mechanisms by which biochar's porous and conductive properties drive these benefits.
Removal of sulfamethoxazole using Fe-Mn biochar filtration columns: Influence of co-existing polystyrene microplastics
Researchers investigated how polystyrene microplastics affect the removal of the antibiotic sulfamethoxazole using iron-manganese modified biochar filtration columns. They found that the presence of microplastics significantly reduced antibiotic retention due to competitive sorption, with the effect varying depending on water pH. The study highlights that co-occurring microplastics in wastewater can interfere with contaminant removal systems, potentially allowing more antibiotics to pass through treatment processes.
Performance and Mechanism of Sulfathiazole Adsorption by Magnetic Biochar: Promoting Effect of Co-existing Polystyrene and Simultaneous Removal
Researchers synthesized a magnetic biochar and tested its ability to remove the antibiotic sulfathiazole from water containing polystyrene microplastics, finding that the biochar achieved efficient removal of both contaminants simultaneously, with the microplastics actually promoting antibiotic adsorption.
An integrated metagenomic model to uncover the cooperation between microbes and magnetic biochar during microplastics degradation in paddy soil
Researchers used magnetic biochar in an advanced oxidation system in paddy soil to investigate whether microbes cooperate with free radicals in degrading polyethylene and PVC microplastics, finding that microbial-biochar synergy enhances microplastic breakdown in flooded soil conditions.
Biochar-Derived Persistent Free Radicals: A Plethora of Environmental Applications in a Light and Shadows Scenario
This review examines biochar, a charcoal-like material that shows promise for cleaning up environmental pollutants including microplastics. However, the researchers warn that biochar contains persistent free radicals that can themselves cause ecological damage and pose risks to human health. The findings suggest that while biochar could help remove microplastics from water and soil, more research is needed to ensure these cleanup materials are safe.
Urban wastewater disinfection by FeCl3-activated biochar/peroxymonosulfate system: Escherichia coli inactivation and microplastics interference
This study evaluated FeCl3-activated biochar combined with peroxymonosulfate as a system for urban wastewater disinfection, assessing pathogen removal efficiency and identifying reactive species responsible for bacterial inactivation.
Effect of microplastics on tertiary/quaternary treatment of urban wastewater: Fe-biochar/peroxymonosulfate/sunlight vs solar photo-Fenton
Researchers evaluated how microplastics present in secondary-treated urban wastewater affect the degradation of four pharmaceutical micropollutants and the inactivation of antibiotic-resistant E. coli using two advanced oxidation processes. Microplastics were found to influence the performance of both iron-modified biochar/peroxymonosulfate and solar photo-Fenton treatments.
Combined Effects of Microplastics and Biochar on the Removal of Polycyclic Aromatic Hydrocarbons and Phthalate Esters and Its Potential Microbial Ecological Mechanism
Researchers investigated the combined effects of microplastics and biochar on the removal of polycyclic aromatic hydrocarbons and phthalate esters from contaminated soil, finding that the combination altered microbial community structure and contaminant fate differently than either amendment alone.
Pyrolysis temperature matters: Biochar-derived dissolved organic matter modulates aging behavior and biotoxicity of microplastics
Researchers found that dissolved organic matter from biochar (a charcoal-like soil additive) affects how microplastics age in the environment by generating reactive oxygen species that alter the plastic surfaces. Importantly, microplastics aged in the presence of biochar-derived compounds caused significantly more inflammation and tissue damage in living organisms than freshly made microplastics. This means microplastics in the real world, where they interact with soil compounds, may be more toxic than laboratory tests with clean plastic particles suggest.
Biochar-Derived Persistent Free Radicals: A Plethora of Environmental Applications in a Lights and Shadows Scenario
This review examined how biochar, a carbon-rich material made from plant and animal waste, contains persistent free radicals that can help break down environmental contaminants. Researchers found that biochar shows promise for removing organic and inorganic pollutants from soil and water, though the study also notes concerns about potential negative effects that need further investigation.
Removal of Antibiotics by Biochars: A Critical Review
This review analyzes how biochars, which are carbon-rich materials made from organic waste, can remove antibiotics from water. While not directly about microplastics, the research is relevant because both antibiotics and microplastics are emerging water contaminants, and microplastics can carry antibiotic residues that promote drug-resistant bacteria. Better water treatment methods that address multiple contaminants could help reduce human exposure to both pollutants.
The Ultraviolet Irradiation Aging Characteristics of Microplastics in Soil under the Action of Biochar
Researchers characterized how microplastics change physically and chemically under ultraviolet irradiation aging, documenting surface cracking, yellowing, and shifts in chemical functional groups. These aging signatures are important for understanding the environmental fate and increased toxicity of weathered microplastics.
Biochar to Enhance Environmental Remediation in Composting
This review examines the application of biochar to composting and vermicomposting processes, highlighting how its porous structure and large surface area improve aeration, gas diffusion, and the passivation of heavy metals. The chapter also details biochar's role in enhancing degradation of organic pollutants including antibiotics, PAHs, heavy oils, microplastics, and organophosphate esters within compost systems.
The effect of bulk-biochar and nano-biochar amendment on the removal of antibiotic resistance genes in microplastic contaminated soil
Researchers tested whether bulk-biochar and nano-biochar amendments could reduce antibiotic resistance genes in microplastic-contaminated soil. They found that microplastics initially increased the abundance of resistance genes, but both biochar types effectively inhibited their spread regardless of microplastic presence. The study suggests that biochar amendment is a promising strategy for managing antibiotic resistance in soils co-contaminated with microplastics.
Emerging contaminants in polluted waters: Harnessing Biochar's potential for effective treatment
This review explores how biochar, a carbon-rich material made from organic waste, can be used to remove a wide range of pollutants from contaminated water, including microplastics, heavy metals, antibiotics, and PFAS. Biochar works through multiple mechanisms like adsorption, electrostatic interactions, and chemical bonding, and can be enhanced through surface modifications. The study highlights biochar as a low-cost, adaptable tool for addressing emerging water contaminants.
Sludge-derived biochar: A review on the influence of synthesis conditions on environmental risk reduction and removal mechanism of wastewater pollutants
This paper is not about microplastics; it reviews methods for preparing biochar from sewage sludge and its use in removing heavy metals and organic pollutants from wastewater.
Self-motivated photoaging of microplastics by biochar-dissolved organic matter under different pyrolysis temperatures
Researchers investigated how dissolved organic matter from biochar affects the photoaging of polystyrene microplastics under different conditions. The study found that biochar produced at lower pyrolysis temperatures significantly accelerated microplastic degradation, suggesting that biochar-derived organic matter may play an important role in the environmental weathering and breakdown of plastic particles.