The persistence and mobility of recalcitrant pollutants

The gap

Evidence profile

Sourced from the future work and stated research gap and stated challenges and abstract of the source papers, classified as general, spanning 3 journals.

Supporting evidence — 6 representative gaps

• Interactions among Heavy Metals, Microplastics and Pesticides in Soil and Advances in Microbial Remediation (2026) · Journal of Innovation and Development · doi

  microbial influencing This review highlights the complex interactions among heavy metals, microplastics, and pesticides in soil environments. Microplastics play dual roles as both carriers and regulators of pollutant behavior, the migration, transformation, and bioavailability of coexisting remediation contaminants. Meanwhile, technologies offer promising solutions for mitigating composite pollution due to their versatility and sustainability. However, current research mainly focuses on single or binary pollutant systems, and studies on multi-pollutant interactions remain limited. Future research should prioritize: (i) elucidating the mechanisms of multi-pollutant interactions at molecular and microbial community levels; (ii) developing robust microbial consortia capable of functioning under complex environmental stress; and (iii) integrating microbial technologies with other remediation strategies for field-scale applications. Overall, advancing our understanding of composite pollution and developing efficient remediation strategies are 3 essential for ensuring soil health and sustainable agricultural development.

  generalfuture workevidence 5/5
  Keywords: microbial pollutant interactions remediation complex microplastics soil technologies composite pollution multi developing strategies influencing review
• Microbial remediation of recalcitrant pollutants in soil and geo-environmental engineering systems (2026) · Frontiers in Bioengineering and Biotechnology · doi

  remediation. The literature search was performed in Scopus, Web of Science, ScienceDirect, PubMed, and Google Scholar. Publications from 2000 to 2025 were considered, with older studies retained only when they established mechanisms that remain standard in the field, such as classical biodegradation pathways, reductive dehalogenation, biosorption, or biomineralization. The same core search structure was applied across databases, with minor syntax changes required by interfaces: (“microbial remediation” OR individual database “bioremediation”) AND (“recalcitrant pollutants” OR “persistent pollutants” OR “soil contamination”) AND (“PAHs” OR “petroleum hydrocarbons” OR “heavy metals” OR “metalloids” OR “PFAS” OR “pesticides” OR “microbial consortia” OR “geo- environmental engineering”). Additional pollutant-specific searches were performed for “microbially induced carbonate precipitation,” “bioelectrochemical remediation,” “microplastic soil remediation,” “PFAS biotransformation,” “omics monitoring,” and “synthetic biology bioremediation.” Records were screened first by title and abstract, and then by full text when the article addressed microbial processes, pollutant transformation or immobilization mechanisms, geo-environmental of microbes, sustainable toward for laboratory or field-scale soil or geoenvironmental matrices, remediation, monitoring endpoints, or emerging microbial technologies. Publications were excluded when they focused only on non-microbial treatment, did not address soil, sediment, groundwater, or geoenvironmental systems, or lacked sufficient methodological detail to support the claim for which they would be cited. This article is a narrative review rather than a systematic review. Therefore, record counts and PRISMA-style screening statistics were not used.

  generalfuture workevidence 5/5
  Keywords: remediation microbial soil search performed publications mechanisms field bioremediation pollutants pfas environmental pollutant monitoring article
• Microbial remediation of recalcitrant pollutants in soil and geo-environmental engineering systems (2026) · Frontiers in Bioengineering and Biotechnology · doi

  FIGURE 15 Synthetic biology approaches for enhanced microbial bioremediation of environmental pollutants (Jiménez-Díaz et al., 2022). laboratory studies Recent advances in environmental biotechnology, microbial ecology, synthetic biology, data science, and materials engineering are opening new opportunities to enhance microbial systems for remediation. Future studies will look to increase remediation efficiency, increase the number of contaminants that can be degraded, and increase the monitoring capability, as well as combine biological processes with sustainable engineering solutions. Future research should move beyond proof-ofconcept toward hypothesis-driven field validation. Key research questions include whether engineered long-term stability and microbial consortia can maintain degradation performance under fluctuating environmental conditions, how microbial community composition changes during extended remediation periods, and whether multispecies systems consistently outperform indigenous microbial populations under field conditions. Future validation studies should include pilot-scale and field-scale trials with appropriate untreated controls, long-term monitoring programs, and standardized performance metrics. Monitoring should evaluate not only contaminant removal but also transformation products, mineralization, residual toxicity, contaminant bioavailability, geochemical stability, groundwater plume behavior, and microbial functional activity. The deployment of engineered microorganisms and synthetic biology approaches should be assessments accompanied addressing ecological transfer, persistence of introduced microorganisms, and potential consequences. Multi-omics unintended technologies should be further developed to identify functional genes, metabolic pathways, and microbial interactions that control contaminant degradation under field conditions. Artificial intelligence and machine learning tools may provide practical support for predictive modeling, process optimization, contaminant transport forecasting, and remediation decisionmaking when integrated with environmental monitoring datasets. These technologies are likely to be most effective in complex contaminated sites where multiple contaminants, heterogeneous environmental conditions, and long remediation periods challenge conventional remediation strategies. impacts, horizontal gene comprehensive environmental biosafety by 10.1 Synthetic biology to the (Sayler increase and Ripp, Synthetic biology has become an exciting new area with great promise in environmental remediation. Genetic engineering and metabolic pathway optimization techniques can be used to genetically engineer microorganisms to degrade pollutants that are naturally resistant to degradation. Synthetic biology can be used to introduce novel catabolic pathways, to increase the tolerance of production of enzymes, and microbial 2000). Engineered stress microorganisms can be created to remove specific contaminants, such as chlorinated compounds, pharmaceuticals, and PFAS. Synthetic gene circuits also have the potential to enhance environmental sensing and pollutant-responsive degradation systems. While significant advances have been made, practical use of engineered microorganisms for environmental applications also has to take into account biosafety issues and regulatory hurdles (Das et al., 2025). Figure 15 illustrates the role of synthetic biology in advancing microbial engineered remediation microorganisms, metabolic pathway optimization, and synthetic microbial consortia. These strategies improve pollutant detection, tolerance, providing degradation efficiency, and microbial promising recalcitrant environmental contaminants. remediation of solutions through the for 10.2 Engineered microbial consortia Complex microbial communities may be responsible for natural remediation processes instead of individual species. Thus, the design of engineered microbial consortia is currently under intense research. Engineered consortia are groupings of microorganisms that have complementary metabolic functions to provide for more complete degradation of many complex contaminant mixtures (Renganathan et al., 2025). These systems can help make the most of substrate oxidation, boost tolerance full mineralisation of pollutants by following metabolic pathways.

  generalfuture workevidence 5/5
  Keywords: microbial environmental remediation synthetic engineered biology microorganisms degradation increase consortia contaminant metabolic systems contaminants monitoring
• Microbial remediation of recalcitrant pollutants in soil and geo-environmental engineering systems (2026) · Frontiers in Bioengineering and Biotechnology · doi

  There is a need for more research on the applications of microbial remediation in geo-environmental engineering. The paper highlights the importance of understanding microbial communities and processes in remediation. There is a gap in the development of effective monitoring and characterization techniques for microbial remediation.

  generalstated research gapevidence 5/5
  Keywords: there need research applications microbial remediation geo-environmental engineering
• Microbial remediation of recalcitrant pollutants in soil and geo-environmental engineering systems (2026) · Frontiers in Bioengineering and Biotechnology · doi

  The persistence and mobility of recalcitrant pollutants in the environment. The need for effective monitoring and characterization techniques for microbial remediation. The potential negative impacts of traditional remediation practices on soil ecosystems.

  generalstated challengesevidence 5/5
  Keywords: persistence mobility recalcitrant pollutants environment need effective monitoring
• ENVIRONMENTAL SAFETY OF PLANT-BASED SINGLE-USE BIODEGRADABLE FOOD-CONTACT MATERIALS (2026) · Zeszyty Naukowe SGSP · doi

  Overall, biological responses weremore closely related to leachate chemistry than to biodegradation rates, indicating thatbiodegradability alone is insufficient as a criterion for environmental safety assessment andhighlighting the need for integrated regulatory frameworks.

  generalabstractevidence 4/5
  Keywords: overall biological responses weremore closely related leachate chemistry biodegradation rates indicating thatbiodegradability alone insufficient criterion

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