Bioremediation potential of green wastes and plant growth promoting rhizobacteria and its enhancement by their combination: A review

Abstract

The increasing anthropogenic and technogenic activities to compensate the raising population and unending demands of humans ended in severe pollution and detrimental damage to the environment. This environmental pollution due to lethal pollutants, toxic heavy metals and organic wastes has been drastically affecting the ecosystem of the living organisms. These are forced to enter into the food chain as they tend to accumulate in the agricultural soils. In order to eliminate these pollutants from the soils the bioremediation will be an efficient tool and this can be achieved by plant growth promoting rhizobacteria and by green wastes. In this study the plant growth promoting rhizobacteria (PGPR) and green wastes are evaluated for their effectiveness in bioremediating the toxic contaminants. Green wastes are rich sources of naturally occurring polyphenols which are potential eliminating agents of these pollutants, they can perform metal chelation, reduction, antibiotic properties, adsorption, complexation and by supplying the nutrients. However, PGPRs are well known plant life saviors from various biotic and abiotic stresses; they are also the bioremediating agents as they perform heavy metal elimination by various methods. In this study, it is also depicted that the combined application of PGPR and green wastes result in the significant method to bioremediate the contaminated sites. The bioremediation by PGPRs and green wastes is the prominent effective way to terminate the pollutants compared to phytoremediation.

Keywords

• Bioremediation
• Bioresources
• Green waste
• Heavy metals
• PGPR