Research Progress on Identification of PAHs-Degrading Bacteria and Bioremediation of PAHs-Contaminated Soil

Polycyclic aromatic hydrocarbons (PAHs) are toxic organic pollutants with mutagenic, teratogenic, and carcinogenic properties. They are widely distributed in soil environment and pose significant hazards to human health through constant exposure. Bioaugmentation (BA) is considered to be an environmentally-friendly and cost-effective environmental remediation technology to remove PAHs from the soil. Screening and identifying functional bacteria that can degrade PAHs is the primary task of the development and application of this technology. The research progress of enrichment culturing method and stable isotope probing (SIP) technology for the discovery of PAHs degrading functional microorganisms was reviewed and the limitations and corresponding strategies of BA remediation technology were discussed, with a view to providing a comprehensive reference for the progress and application of BA technology.