Photocatalytic Degradation of Safranine by ZnO–Bentonite: Photodegradation versus Adsorbability

被引：10

作者：

Sonawane G.H. ^{[1
]}

Patil S.P. ^{[2
]}

Shrivastava V.S. ^{[2
]}

机构：

[1] Department of Chemistry, Kisan Arts, Commerce and Science College, Parola, 425 111, Maharashtra

[2] Nano-Chemistry Research Laboratory, G. T. Patil College, Nandurbar, 425 412, Maharashtra

来源：

Journal of The Institution of Engineers (India): Series E | 2017年 / 98卷 / 01期

关键词：

Adsorption kinetics; Photocatalytic degradation; Safranine; ZnO–bentonite nanocomposite;

D O I：

10.1007/s40034-016-0089-1

中图分类号：

学科分类号：

摘要：

ZnO–bentonite nanocomposite was obtained by incorporation of bentonite clay with ZnO. The effects of pH, contact time, initial dye concentration and photocatalyst dose on the rate of degradation of dye solution were studied. It was observed that working conditions strongly influence the dye removal process. Contact time 70 min and pH 4 was optimized for photocatalytic degradation of Safranine. Adsorption kinetics for 20–80 mg/l dye concentration was found to follow pseudo-second-order kinetics. Adsorption of dye was described by Langmuir and Freundlich isotherm. In adsorption isotherm, Langmuir isotherm was found to fit well with experimental data than Freundlich isotherm. The monolayer adsorption capacity was found to be 50 mg/g. The amount of dye adsorbed (qt) increases from 17.31 to 159.62 mg/g as dye concentration increases from 20 to 80 mg/l for 0.4 g/l photocatalyst dose. The photocatalytic degradation of Safranine by ZnO–bentonite takes place by advanced oxidation process. © 2016, The Institution of Engineers (India).

引用

页码：55 / 63

页数：8

共 25 条

[1]

Divya N., Bansal A., Jana A.K., Photocatalytic degradation of azo dye Orange II in aqueous solutions using copper-impregnated titania, Int. J. Environ. Sci. Technol, 10, pp. 1265-1274, (2013)

[2]

Belgiorno V., Rizzo L., Fatta D., Della Rocca C., Lofrano G., Nikolaou A., Naddeo V., Meric S., Review on endocrine disrupting emerging compounds in urban wastewater: occurrence and removal by photocatalysis and ultrasonic irradiation for wastewater reuse, Desalination, 215, 1-3, pp. 166-176, (2009)

[3]

Bernabeu A., Vercher R.F., Santos-Juanes L., Simon P.J., Lardin C., Martinez M.A., Vicente J.A., Gonzalez R., Llosa C., Arques A., Amat A.M., Solar photocatalysis as a tertiary treatment to remove emerging pollutants from wastewater treatment plant effluents, Catal. Today, 161, pp. 235-240, (2011)

[4]

Castiglioni S., Bagnati R., Fanelli R., Pomati F., Calamari D., Zuccato E., Removal of pharmaceuticals in sewage treatment plants in Italy, Environ. Sci. Technol, 40, pp. 357-363, (2006)

[5]

Ho L., Grasset C., Hoefel D., Dixon M.B., Leusch F.D.L., Newcombe G., Saint C.P., Brookes J.D., Assessing granular media filtration for the removal of chemical contaminants from wastewater, Water Res, 45, pp. 3461-3472, (2011)

[6]

Joss A., Keller E., Alder A.C., Gobel A., McArdell C.S., Ternes T., Siegrist H., Removal of pharmaceuticals and fragrances in biological wastewater treatment, Water Res, 39, pp. 3139-3152, (2005)

[7]

Rajamanickam D., Shanthi M., Photocatalytic mineralization of a water pollutant, Sunset Yellow dye by an advanced oxidation process using a modified catalyst, Toxicol. Environ. Chem, 95, pp. 1484-1498, (2013)

[8]

Di Paola A., Garcia-Lopez E., Marci G., Palmisano L., A survey of photocatalytic materials for environmental remediation, J. Hazard. Mater, 211-212, pp. 3-29, (2012)

[9]

Tzikalos N., Belessi V., Lambropoulou D., Photocatalytic degradation of reactive red 195 using anatase/brookite TiO<sub>2</sub> mesoporous nanoparticles: optimization using response surface methodology (RSM) and kinetics studies, Environ. Sci. Pollut. Res, 20, pp. 2305-2320, (2013)

[10]

Nemade K.R., Barde R.V., Waghuley S.A., Photocatalytic study of alumina–zirconia ceramic nanocomposite synthesized by spray pyrolysis, Ceram. Int. Part B, 41, pp. 4836-4840, (2015)

← 1 2 3 →