Multivariate Effects of Dissolved Water Components on Bisphenol A Photodegradation with Response Surface Methodology
Under UV irradiation conditions,bisphenol A(BPA)was used as a model compound to study the composite effects of representative soluble components humic acid(HA),Fe3+,and Cl-on the photolysis of BPA in the aqueous environment using response surface methodology(RSM).Results show that HA and Fe3+are the significant factors affecting the photodegradation of BPA,followed by NO3-and Cl-.HA,NO3-and Cl-significantly inhibits the photolysis of BPA,while Fe3+promotes it(P＜0.05).When HA,Fe3+,NO3 and Cl-co-exists in the water environment,an interaction on the photolysis of BPA is established.As significant factors,the combination of Fe3+and Cl-or HA respectively inhibits the photodegradation of BPA,while the coexistence of HA-C1-or HA-NO3-shows promoting effect.As non-significant factors,there are antagonistic effects between NO3-and Fe3+or between NO3-and Cl-.Radical scavenging experiments unveils that the most important factor HA on BPA photodegradation is mainly attributed to triplet-excited DOM.The predicted value of the model obtained from the natural water sample is in good agreement with the experimental value,indicating that the model can be used to estimate the photolysis of BPA in the natural water sample used,but it also has certain limitations.
万方数据
维普
