Biodegradation of organofluorine compounds: 

Research on organofluorine biodegradation focuses on understanding how microorganisms transform and mineralize fluorinated organic compounds, which are widely used in pharmaceuticals, agrochemicals, refrigerants, and industrial products. The strong carbon–fluorine (C–F) bond makes many organofluorine compounds highly persistent in the environment, posing challenges for natural attenuation and remediation. Recent studies have identified bacteria and fungi capable of degrading certain fluorinated aromatics, aliphatics, and fluorinated pharmaceuticals through enzymatic defluorination pathways. Advances in genomics, metabolomics, and environmental microbiology have revealed novel enzymes and microbial communities involved in fluoride release and carbon skeleton degradation. However, biodegradation rates and extents vary widely depending on molecular structure, degree of fluorination, and environmental conditions. 

While some progress has been made for mono- and polyfluorinated compounds, the complete biodegradation of highly fluorinated substances, particularly many PFAS, remains limited. Current research aims to discover new defluorinating microorganisms, elucidate degradation mechanisms, and develop biotechnological strategies to enhance the bioremediation of persistent organofluorine contaminants.

Microplastic research:

Microplastics, typically defined as plastic particles smaller than 5 mm, have become a widespread environmental contaminant in aquatic, terrestrial, and atmospheric ecosystems. Their persistence and small size allow them to accumulate in soils, rivers, oceans, and living organisms. Microplastics can be ingested by a wide range of organisms, including plankton, invertebrates, fish, birds, and mammals, potentially causing physical damage, reduced growth, impaired reproduction, and altered behavior.

In addition to their direct effects, microplastics can act as carriers for toxic chemicals, heavy metals, and pathogenic microorganisms, facilitating their transport through the environment and food webs. In soils, microplastics alter soil structure, water retention, nutrient cycling, and microbial community composition, while in aquatic systems they can affect ecosystem function and biodiversity.

In wastewater treatment systems microplastics are contaminants of emerging concern. They enter wastewater from sources such as synthetic textiles, personal care products, tire wear particles, and the breakdown of larger plastics. Conventional wastewater treatment plants can remove a large proportion of microplastics through screening, sedimentation, and biological treatment processes. However, significant numbers of smaller particles may still pass into treated effluent or accumulate in sewage sludge. The presence of microplastics in wastewater poses environmental challenges because these particles can transport adsorbed pollutants, heavy metals, and affect microbial aggregation. Current research focuses on understanding the fate and impact of microplastics and plastic additives on microbial processes in wastewater. Research is essential for reducing microplastic release into the environment and minimizing their ecological impacts on microbial water treatment processes.

Biochar for environmental management:

Biochar research has expanded rapidly due to its potential benefits for agriculture, environmental remediation, and climate change mitigation. Biochar is a carbon-rich material produced by the pyrolysis of biomass under limited oxygen conditions. Studies have shown that biochar can improve soil properties by increasing water-holding capacity, enhancing nutrient retention, reducing nutrient leaching, and promoting beneficial microbial activity. These effects often lead to improved plant growth and greater resilience to drought and other environmental stresses. 

Biochar has emerged as a promising material for environmental remediation due to its high surface area, porous structure, and diverse surface functional groups. Research has demonstrated its effectiveness in removing a wide range of contaminants from soil and water, including heavy metals, pesticides, pharmaceuticals, dyes, and other organic pollutants. Biochar can immobilize contaminants through adsorption, ion exchange, complexation, and precipitation processes, thereby reducing their mobility and bioavailability. In soil remediation, biochar is widely used to stabilize toxic metals and improve soil quality, while in water treatment it serves as a low-cost adsorbent for contaminant removal. 

Beyond contaminant removal, biochar can support microbial communities involved in pollutant degradation and improve ecosystem recovery. Current research focuses on understanding how feedstock type, production conditions, and application rates influence long-term biochar performance, ecosystem resistance and resilience to environmental change.