Removal of phenol by Isochrysis galbana in seawater under varying temperature and light intensity

Abstract

Phenol is a common industrial chemical produced and transported worldwide largely. Therefore, accidental spillage of phenol in the ocean causes an increasing concern. Microalgae are promising to remove phenol from marine waters. However, temperature and light intensity are two main factors that markedly infl uence biodegradation in marine environments. In this study, a marine golden alga Isochrysis galbana is selected to research the removal of phenol under diff erent temperatures (10-30°C) and light intensities (0-240 μmol/(m 2 •s)). The results show that the most suitable temperature and light intensity for phenol removal are 20°C and 180 μmol/(m 2 •s), respectively, and 100 mg/L of phenol can be completely removed by microalga in 24 h at these conditions. I. galbana can also remove phenol under dark and low-temperature conditions. The removal of phenol by I. galbana at diverse temperatures and light intensities conform to fi rst-order kinetics, and the process under dark conditions conform to zero-order kinetics. Thus, I. galbana can be used in the in-situ bioremediation of polluted seawater by phenol.

Effect of co-culture with Halomonas mongoliensis on Dunaliella salina growth and phenol degradation

“…Culture medium temperature is an important conditioning factor for microbial growth and metabolic activities ( Newsted, 2004 ; Li et al, 2019 ; Li et al, 2020 ). The effect of temperature on phenol removal and the growth of D. salina was studied within a range of 19°C and 37°C.…”