Algal-based system for removal of emerging pollutants from wastewater: A review

[Display omitted] •Various algal-bioremediation strategies for emerging pollutants are available.•Algal-bioremediation at pilot-scale level is still a challenging one.•Chlorella sp. is the most abundantly employed species for algal-bioremediation.•More integrated and holistic approach of algal-bioremediation required. The bioremediation of emerging pollutants in wastewater via algal biotechnology has been emerging as a cost-effective and low-energy input technological solution. However, the algal bioremediation technology is still not fully developed at a commercial level. The development of different technologies and new strategies to cater specific needs have been studied. The existence of multiple emerging pollutants and the selection of microalgal species is a major concern. The rate of algal bioremediation is influenced by various factors, including accidental contaminations and operational conditions in the pilot-scale studies. Algal-bioremediation can be combined with existing treatment technologies for efficient removal of emerging pollutants from wastewater. This review mainly focuses on algal-bioremediation systems for wastewater treatment and pollutant removal, the impact of emerging pollutants in the environment, selection of potential microalgal species, mechanisms involved, and challenges in removing emerging pollutants using algal-bioremediation systems.