Bioremediation of propylbenzenes by a novel marine microalga Rhinomonas reticulata S6A isolated from Daya Bay: acute toxicity, growth kinetics and biodegradation performance

This study investigated the degradation characteristics of propylbenzenes (PBZs, including isopropylbenzene and n-propylbenzene), with high leakage risks ecological hazards, by a newly isolated marine microalga named Rhinomonas reticulata S6A which is promising candidate for eco-friendly bioremediation from marine. About 72% 56% n-PBZ i-PBZ can be degraded after 7 days in culture. The acute toxicity (96h - EC 50 = 2.38 mg/L) was higher than that 3.65 mg/L). growth inhibition kinetics this strain were consistent Edwards model ( R 2 0.998) Aiba 0.999). optimal concentrations calculated to 2.42 mg/L 2.78 mg/L, respectively. trends PBZs conformed zero-order kinetic model, k increased initial concentrations. moderate increase inoculation density could accelerate PBZs, maximum specific rates r ) 1.116/d (n-PBZ) 1.230/d (i-PBZ) at 10 4 cells/mL, while over-inoculation (initial microalgae more 5 cells/mL) not conducive pollutants. There much data on biodegradation aquatic environment, so it would worthwhile try apply new explore fate PBZs.