Microbes and microbial strategies in carcinogenic polycyclic aromatic hydrocarbons remediation: a systematic review

Abstract

Degradation, detoxi cation or removal of the omnipresent polycyclic aromatic hydrocarbons (PAHs) from the ecosphere as well as their prevention from entering into food chain has never appeared simple. In this context, cost-effective, eco-friendly and sustainable solutions like microbes-mediated strategies have been adopted worldwide. With this connection, measures have been taken by multifarious modes of microbial remedial strategies, i.e., enzymatic degradation, bio lm and biosurfactant production, application of biochar immobilized microbes, lactic acid bacteria, rhizospheric-phyllospheric-endophytic microorganisms, genetically engineered microorganisms, and microbial fuel cell techniques etc. In this review, a nine-way directional approach which is based on the microbial resources reported over the last couple of decades has been described. Fungi found as the most dominant taxa among the CPAHdegrading microbial community constituting 52.2%, while bacteria, algae and yeasts occupied 37.4%, 9.1% and 1.3%, respectively. In addition to these, category-wise CPAH degrading e ciencies of each microbial taxa, consortium-based applications, CPAH-degradation related molecular tool, and factors affecting CPAH-degradation are the other important aspects of this review in light of their appropriate selection and application in the PAH-contaminated environment for better human-health management in order to achieve a sustainable ecosystem. HighlightsMicrobial strategies for carcinogenic PAHs remediation Individual and consortia effects of microbial communities in CPAHs degradation Abundance of CPAH degraders: fungi (52.2%)> bacteria (37.4%)> algae (9.1%)> yeasts (1.3%) Factors affecting CPAHs remediationReduced bioaccumulation and biomagni cation of CPAHs in food chain via microbial remediation strategies

Growth Dynamics and Nutrient Removal from Biogas Slurry Using Water Hyacinth

“…The research covered exploration within the WoS utilising specific keywords, including "Water hyacinth" and "Phytoremediation", retrieving 326 articles. Using the VOS viewer software (version 1.6.20), the articles screened based on keyword co-occurrence values up to seven, resulting in the selection of 85 keywords which were further screened for an optimised and relevant visualisation resembling this study objective [1,39,[42][43][44][45]. A network map was generated using frequently used keywords, and the findings are illustrated in Figure 1.…”