Catalase-mediated remediation of environmental pollutants and potential application - a review

Catalases (EC 1.11.1.6) found their place among environment-relevant biocatalysts for their exceptional catalytic rate and thermostability. It is essential for neutralizing the noxious hydrogen peroxide in the living system by curtailing free radical-induced damage, which makes it a significant biomarker. It has the highest turnover rate among enzymes and also has the merit of one of the first protein crystals isolated. Recent studies suggest the pivotal role of catalases in bioremediation and monitoring toxic contaminants in the environment. This review provides an overview of applications of catalases in the degradation of pollutants like phenolic compounds, pesticides, dyes, and polyaromatic hydrocarbons, development of catalase-based biosensors for monitoring of H2O2 and other hazardous wastes, and remediation of wastewater achieved by catalase immobilized micro/nanomotors.