AUTHOR=Srivastava Varsha TITLE=Grand Challenges in Chemical Treatment of Hazardous Pollutants JOURNAL=Frontiers in Environmental Chemistry VOLUME=2 YEAR=2021 URL=https://www.frontiersin.org/journals/environmental-chemistry/articles/10.3389/fenvc.2021.792814 DOI=10.3389/fenvc.2021.792814 ISSN=2673-4486