| In discussing advanced oxidation technology, the present experiment aimed anthraquinones dissolved organic matter and Fenton-law couple driving under simulated sunlight degradation of Rhodamine B and anthraquinones dissolved organic matter and coupled driving under simulated sunlight activated persulfate Degradation rhodamine B feature mechanisms were studied.Persulfate activated through data analysis, when the anthraquinone(AQS, AQDS, HQ) and Fe(Ⅲ) co-exist, the highest degree of activation of persulfate, RhB has the fastest rate of degradation. Activation of different anthraquinone followed AQS> AQDS>HQ, where the reaction system under the former two final rhodamine B degradation rate of more than 80%, less than 50 percent under the HQ system. Within a certain range, with the increase of the concentration of anthraquinone decolorization rate increased rhodamine B concentration in anthraquinone, when anthraquinone concentration is too high, the decolorization rate of Rhodamine B but decreased in acidic and alkaline Under conditions when high sulfate activation degree, bleaching faster rate of Rhodamine B, under neutral conditions, the lowest rate of rhodamine B bleaching. When participation in the anthraquinone system without Fe( Ⅲ), by increasing the concentration of potassium II, Rhodamine B decolorization rate will be increased, excess potassium persulfate, it will inhibit the degradation rate. When adding sulfate radical quencher methanol and TBA, the reaction is inhibited, and the inhibition of methanol clear that when methanol is 10mmol/L, the strongest inhibition, adding Fe(Ⅲ) and Fe(Ⅱ) accelerator When hydroxylamine hydrochloride, the reaction is promoted. Through the above phenomenon known: the effective substance is decolored Rhodamine B was activated persulfate sulfate radical. Lepidocrocite by microbial reduction alienation prepared 1#-5# five iron ore, iron ore by five kinds at pH is 3 and pH is 4.1, research anthraquinone class participation iron Fenton Photocatalytic rhodamine B degradation mechanism. The study found: Participate in a class 1#-5# Fenton reaction in iron ore anthraquinone material is a key factor, pH, influence plays a major role. pH is 3, the degree of degradation of the absence of light with the same lighting conditions, the decolorization rate system under AQS and AQDS Rhodamine B up to about 80% lower at HQ, up to about 50%. pH is 4.1, the next AQS and AQDS system, the degradation rate of less than 60%, HQ degradation hardly occurs. Degradation by iron ore characteristics under different conditions of knowledge, anthraquinone substance plays a very important role, when no anthraquinone participate, RhB almost does not wear occurs. RhB has the fastest rate of degradation. Activation of different anthraquinone followed AQS> AQDS>HQ, When anthraquinone substance concentration is increased within a certain range, as the concentration increases, degradation rate increased rapidly. |
