非均相催化剂黄钾铁矾处理含吲哚污水的研究
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摘要
选用黄钾铁矾作为类芬顿催化剂催化H_2O_2对废水中的吲哚进行处理,并采用XRD与XPS对黄钾铁矾进行表征分析。考察了该反应体系pH值、黄钾铁矾投加量、H_2O_2浓度以及无机阴离子等对去除效果的影响,并研究了其反应机制。结果表明:黄钾铁矾投加量2 g/L,H_2O_2浓度1 000 mg/L,pH=2.70的条件下吲哚的去除效果好,降解率可达78%,NO~-_3与SO_4~(2-)对吲哚的去除有抑制作用。通过甲醇淬灭实验证实了吲哚的降解过程中起主要作用的为羟基自由基。。
Jarosite as Fenton-like catalyst is selected to catalyze H_2O_2 treating indole wastewater, and it is characterized by XRD and XPS. The effects of pH, dosage of jarosite, H_2O_2 concentration and inorganic anions on the removal efficiency of the reaction system are investigated and the reaction mechanism is studied. The results show that, the optimum efficiency can achieve 78% under the condition of dosage of 2 g/L jarosite, 1 000 mg/L of H_2O_2, pH=2.70. NO~-_3 and SO_4~(2-) inhibit the removal of indole. Hydroxyl radical is found to play a major role in the degradation of indole by methanol quenching.
Jarosite as Fenton-like catalyst is selected to catalyze H_2O_2 treating indole wastewater, and it is characterized by XRD and XPS. The effects of pH, dosage of jarosite, H_2O_2 concentration and inorganic anions on the removal efficiency of the reaction system are investigated and the reaction mechanism is studied. The results show that, the optimum efficiency can achieve 78% under the condition of dosage of 2 g/L jarosite, 1 000 mg/L of H_2O_2, pH=2.70. NO~-_3 and SO_4~(2-) inhibit the removal of indole. Hydroxyl radical is found to play a major role in the degradation of indole by methanol quenching.
引文
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[2] 陈頔,董晓丽,马春,等.日光/TiO2-Fenton试剂处理吲哚废水提高去除率[J].大连工业大学学报,2006,25(4):248-251.
[3] Qu Y,Shen E,Ma Q,et al.Biodegradation of indole by a newly isolated Cupriavidus sp SHE[J].环境科学学报(英文版),2015,34(8):126-132.
[4] 于洋.臭氧氧化去除水中吲哚类含氮污染物实验研究[D].哈尔滨:哈尔滨工业大学,2012.
[5] Rtimi S,Robyr M,Pulgarin C,et al.A new perspective in the use of FeOx-TiO2,photocatalytic films:Indole degradation in the absence of Fe-leaching[J].Journal of Catalysis,2016,342:184-192.
[6] Assadi A A.Effective heterogeneous electro-Fenton process for the degradation of a malodorous compound,indole,using iron loaded alginate beads as a reusable catalyst[J].Applied Catalysis B Environmental,2016,182:47-58.
[7] Yan S,Zheng G,Meng X,et al.Assessment of catalytic activities of selected iron hydroxysulphates biosynthesized using acidithiobacillus ferrooxidans,for the degradation of phenol in heterogeneous Fenton-like reactions[J].Separation & Purification Technology,2017.
[8] Wang Z,Xiao D,Liu R,et al.Fenton-like degradation of reactive dyes catalyzed by biogenic jarosite[J].Journal of Advanced Oxidation Technologies,2014,17(1):1203-1207.
[9] Xu Z,Liang J,Zhou L.Photo-Fenton-like degradation of azo dye methyl orange using synthetic ammonium and hydronium jarosite[J].Journal of Alloys & Compounds,2013,546(1):112-118.
[10] 李中春.一种黄钾铁矾的制备方法.CN103936080A[P].2014.
[11] Xu Z,Lu B,Wu J,et al.Reduction of Cr(VI) facilitated by biogenetic jarosite and analysis of its influencing factors with response surface methodology[J].Materials Science & Engineering C,2013,33(7):3723-3729.
[12] 荣景瑶.非均相Fenton氧化法降解水中苯酚的实验研究[D].哈尔滨:哈尔滨工程大学,2013.
[13] Hsueh C L,Huang Y H,Wang C C,et al.Degradation of azo dyes using low iron concentration of Fenton and Fenton-like system[J].Chemosphere,2005,58(10):1409-1414.
[14] Seo J,Lee H J,Lee H,et al.Enhanced production of reactive oxidants by Fenton-like reactions in the presence of carbon materials[J].Chemical Engineering Journal,2015,273:502-508.
[15] 段洪涛.施氏矿物催化降解硝基苯的性能研究[D].天津:天津理工大学,2016.
[16]Zhang X,Ding Y,Tang H,et al.Degradation of bisphenol A by hydrogen peroxide activated with CuFeO2,microparticles as a heterogeneous Fenton-like catalyst:Efficiency,stability and mechanism[J].Chemical Engineering Journal,2014,236:251-262.
[17] Chen H,Zhang Z,Yang Z,et al.Heterogeneous fenton-like catalytic degradation of 2,4-dichlorophe NOx yacetic acid in water with FeS[J].Chemical Engineering Journal,2015,273:481-489.
[18] 李文娟,陈井影,王志畅.离子色谱法测定地表水中六种无机阴离子[J].东华理工大学学报(自然科学版),2010,33(3):286-289.
[19] Neta P,Huie R E,Ross A B.Rate constants for reactions of inorganic radicals in aqueous solution[J].Journal of Physical & Chemical Reference Data,1988,17(3):1027-1284.
[20] Roy P,Periasamy A P,Liang C T,et al.Synthesis of graphene-ZnO-Au nanocomposites for efficient photocatalytic reduction of nitrobenzene[J].Environmental Science & Technology,2013,47(12):6688.
[21] Wang W M,Song J,Han X.Schwertmannite as a new Fenton-like catalyst in the oxidation of phenol by H2O2[J].Journal of Hazardous Materials,2013,262(8):412-419.
[22] Hassan H,Hameed B H.Fe–clay as effective heterogeneous Fenton catalyst for the decolorization of reactive blue 4[J].Chemical Engineering Journal,2011,171(3):912-918.
[23] Kwan W P,Voelker B M.Rates of hydroxyl radical generation and organic compound oxidation in mineral-catalyzed Fenton-like systems [J].Environmental Science & Technology,2003,37(6):1150.