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When pollutants like petroleum hydrocarbons as one of the major origins of aquatic pollution, enter the environment, they alter the biological and/or physicochemical characteristics of the aforementioned sites due to their potential of bioaccumulation, biomagnification, and resistance against biodegradation besides its toxicity and carcinogenicity in nature. Thus, the importance of degradation, deterioration and remediation of these pollutants from environments such as aquatic environments via a green method such as bioremediation is undeniable. Biosurfactants as secondary metabolites of microorganisms, enhance the bioremediation rate of petroleum hydrocarbons. Using oleophilic microorganisms with the capability of biosurfactant production which this paper calls "potential microorganisms" in a bioremediation system is promising. This article reviews the effective factors on bioremediation and the share of biosurfactants on the rate of bioremediation process, chemical surfactants and their limiting factors as biosurfactant's chemical counterpart, the rising market of biosurfactant and its promising future, various types of biosurfactants, and the requirements to develop an optimized biosurfactant-base bioremediation system. Furthermore, this paper based on former studies suggests a novel in-situ biosurfactant-based bioremediation system integrated with Biochar called “Potential Microorganisms Immobilized on Biochar system” (PMIBC system) as a cost-effective in-situ bioremediation system for decontamination of aquatic environments like groundwater, lakes, marshes, etc. from petroleum hydrocarbons and oil spills which requires further study.

Biosurfactant, a green and effective solution for bioremediation of petroleum hydrocarbons in the aquatic environment