The effect of nitrate, bicarbonate and natural organic matter on the degradation of sunscreen agent p-aminobenzoic acid by simulated solar irradiation

► In this study, we found that p-aminobenzoic acid (PABA) can be removed by simulated solar irradiation from water. ► Influence of environmental components on the photodegradation of PABA was further studied. ► We verified using LC/MS that PABA was transformed into four compounds. ► We proposed the possible reaction pathways probably resulting from OH and NO2 radicals attack to PABA.