Bio-MOF-11(Co)activated PMS for simultaneously removing rhodamine B and Cu2+from wastewater
Bio-MOF-11(Co)was used to activate peroxymonosulfate(PMS)for simultaneously removing rhodamine B(RhB)and Cu2+from wastewater,and the effects of Bio-MOF-11(Co)dosage,PMS concentration,initial pH value,reaction temperature,initial concentration of RhB and Cu2+ concentration on the degradation of RhB and the removal of Cu2+were evaluated.Experimental results indicate that the degradation of RhB was in accordance with the pseudo-first-order reaction kinetics and the maximum adsorption of Cu2+ was 22.98mg/g.The degradation efficiency of RhB and the removal rate of Cu2+ after the reaction of 15min reached to 98.2％and 73.3％,respectively,under the optimal conditions of 20mg/L RhB,2.5mg/L Cu2+,80mg/L Bio-MOF-11(Co),1.0mmol/L PMS,pH 7.0,and reaction temperature of 25℃.Free radical quenching experiments confirmed that RhB could be degraded by both non-free radical(1O2)and free radical(SO4-`,·O2 and·OH)oxidation as inferred by UV-VIS absorption spectrum analysis,and Cu2+could be removed by Bio-MOF-11(Co)adsorption.Simultaneous removal of organic pollutants and heavy metals could be achieved in Bio-MOF-11(Co)-activated peroxymonosulfate(PMS)system.
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