铜非均相催化过硫酸盐降解废水
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摘要
在酸化后的活性炭上负载氧化铜制备CuO/AC催化剂,采用XRD对催化剂的组成进行表征,并在非均相体系中催化过硫酸盐降解活性艳蓝废水。通过控制变量法探索各影响因素对降解效率的影响,确定反应体系的最佳条件,并验证了反应体系中的自由基。室温时,当CuO/AC催化剂投加量为0.9g/L、K_2S_2O_8投加量为0.7g/L,在溶液初始pH的条件下处理活性艳蓝3.5h时,脱色率达到90%;升高温度有利于活性艳蓝的脱色,70℃时活性艳蓝的脱色率接近100%。结果表明,CuO/AC催化剂可活化过硫酸盐降解废水,提高其降解效率。
CuO/AC catalyst was prepared by loading copper on acidic activated carbon,and its compositions was characterized by X ray diffraction method.Reactive brilliant blue,as the main pollutants in simulated wastewater,was degraded by persulfate with CuO/AC as catalyst,in a heterogeneous system.The optimal reaction conditions were determined by evaluating the effect of experimental conditions on the decolorization efficiency of brilliant blue.When the conditions were CuO/AC catalyst dosage of 0.9g/L,K_2S_2O_8 dosage of 0.7g/L,initial pH of the solution,3.5hat room temperature,the decolorization efficiency of brilliant blue was high up to 90%. The decolorization efficiency increased with the solution temperature increasing,which was almost 100%when the temperature was 70℃.The results showed that CuO/AC catalyst could activate persulfate to degrade wastewater,and thus enhanced the degradation efficiency of waste.
CuO/AC catalyst was prepared by loading copper on acidic activated carbon,and its compositions was characterized by X ray diffraction method.Reactive brilliant blue,as the main pollutants in simulated wastewater,was degraded by persulfate with CuO/AC as catalyst,in a heterogeneous system.The optimal reaction conditions were determined by evaluating the effect of experimental conditions on the decolorization efficiency of brilliant blue.When the conditions were CuO/AC catalyst dosage of 0.9g/L,K_2S_2O_8 dosage of 0.7g/L,initial pH of the solution,3.5hat room temperature,the decolorization efficiency of brilliant blue was high up to 90%. The decolorization efficiency increased with the solution temperature increasing,which was almost 100%when the temperature was 70℃.The results showed that CuO/AC catalyst could activate persulfate to degrade wastewater,and thus enhanced the degradation efficiency of waste.
引文
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[3]LIOU R M,CHEM S H.CuO impregnated activated carbon for catalytic wet peroxide oxidation of phenol[J].Journal of Hazardous Materials,2009,172:489-506.
[4]FARIA P C C,ORFAO J J M,PEPEIRA M F R.Activated carbon and ceria catalysts applied to the catalytic ozonation of dyes and textile effluents[J].Applied Catalysis B:Environmental,2009,88(2/3):341-350.
[5]宋天顺,张利民.活性炭催化氧化预处理TPA废水[J].离子交换与吸附,2006,22(3):208-215.
[6]陈海斌,梁春华.利用纳米零价铁进行印染废水脱色实验研究[J].环境保护科学,2011,37(2):17-19.
[7]BRADU C,FRUNZA L,MIHALCHE N,et al.Removal of reactive black 5azo dye from aqueous solutions by catalytic oxidation using CuO/Al2O3 and NiO/Al2O3[J].Applied Catalysis B:Environmental,2010,96(2/3):548-556.
[8]WANG S L,XU H,QIAN L Q,et al.CTAB-assisted synthesis and photocatalytic property of CuO hollow microspheres[J].The Journal of Solid State Chemistry,2009,182(5):1088-1093.
[9]刘玉德,蒋柏泉,陈建新.椰壳制备活性炭负载氧化铜处理酸性大红GR染料废水[J].南昌大学学报(工科版),2011,33(3):222-226.
[10]蒋柏泉,公振宇,陈建新,等.载铜活性炭的制备及其处理印染废水的应用[J].南昌大学学报(工科版),2011,33(1):7-11.
[11]RASTOGI A,Al-ABED S R,DIONYSIOU D D.Sulfate radical-based ferrousperoxymonosulfate oxidative system for PCBs degradation in aqueous and sediment systems[J].Applied Catalysis B Environmental,2009,85(2/3):171-179.
[12]LIU C S,SHIH K,SUN C X,et al.Oxidative degradation of propachlor by ferrous and copper ion activated persulfate[J].Science of the Total Environment,2012,416:507-512.
[13]HUANG Y F,HUANG Y H.Identification of produced powerful radicals involved in the miner alization of bisphenol a using a novel UV-Na2S2O8/H2O2-Fe(Ⅱ,Ⅲ)two-stage oxidation process[J].Journal of Hazardous Materials,2009,162(2/3):1211-1216.
[14]LIPCTNSKA-KOCHANY E,SPRAH G,HATMSS.Influence of some groundwater and surface waters constituents on the degradation of 4-chlorophenol by the fenton reaction[J].Chemosphere,1995,30(1):9-20.
[15]ZHAO J Y,ZHANG Y B,QUAN X,et al.Enhanced oxidation of 4-chlorophenol using sulfate radicals generated from zero-valent iron and peroxydisulfate at ambient temperature[J].Separation and Purification Technology,2010,71(3):302-307.