Simultaneous Photo-Oxidative Degradation of EDTA and Extro-Oxidative Recovery of Copper from Industrial Effluents

Document Type: Research Article

Author

Center for Environmental and Occupational Research, Hamadan, P.O. Box 65175- 4193, I.R. IRAN

Abstract

The objectives of this investigation are the studies on the effect of copper ion on photolytic degradation of ethylenediaminetertraaceticacid (EDTA), the effect of EDTA on electrolytic recovery of copper as well as the introduction of a novel combined photolytic and electrolytic cell system for simultaneous recovery of copper and the degradation of EDTA.In this experimental study, a photolytic cell, an electrochemical system, and a combined photolytic -electrochemical (photoelectrolysis) system with and without an activated carbon cathode were used. Analysis was carried out using atomic absorption spectroscopy, and high performance liquid chromatography (HPLC).The results show that a single electrochemical cell can be used to recover copper (82.1% after 9 hours) without achieving complete mineralization of EDTA by anodic oxidation (49.9 % after 9 hours). On the other hand a single photolytic cell can achieve 99.9% degradation of EDTA after 9 hours at pH 3.5 but leaves copper in solution. However, a combined photoelectrolytic system using an activated carbon concentrator cathode achieves a rapid simultaneous degradation of EDTA and recovery of copper. The amount of degradation of EDTA was 99.9% while recovery of copper was 98.8% after 9 hours.

Keywords

Main Subjects


[1] Babey, P.A., Emilio, C.A., Ferreyra, R.E., Gautier, E.A., Gettar, R.T. and Litter, M.I., Kinetics and mechanisms of EDTA photocatalytic degradation with TiO2 , J. Water Science and technology, 44 (5), 179 (2001).

[2] Li, Z.B., Shuman, L.M., Redistribution of forms of zinc , cadmium and nickel in soils treated with EDTA , Sci. Total Environ., 191, 95 (1996).

[3] VanGinkel, C.G., Virtapohia, J., Steyaert, J.A.G., R., Treatment of EDTA-containing pulp and paper mill waste waters in activated sludge plants., Tappi J., 82, 138 (1999).

[4] Virtapohia, J., Alen,  R.,  Accelerated  degradation  of EDTA in an activated sludge plant study looks at a sluge plant-operating under alkaline conditions., pulp & paper-Canada, 99, 53 (1998).

[5] Henneken,L., Norte,amm, B., Hempel, D.C., Biological degradation of EDTA: Reaction kinetics and technical approach ., J.Chem. Tech. Biotechnol., 73, 144 (1998).

[6] Kaluza, U., Kilgelhofer, P., Taeger, K., Microbial degradation of EDTA in an industrial wastewater treatment plant, water Res., 32, 2843 (1998).

[7] Thomas, R.A.P., Lawlor, K., Bailey, M., Macaskie, L.E., Biodegradation of metal – EDTA complexes by an enriched microbial population , Appl. Environ. Microbiol., 64, 1319 (1998).

[8] Yang X., Jiang Z., Guan Y., Deng, J., Lu, M., Biodegradation behavior of ethylenediamine-tetraethylene acid, Huan Jing Ke Xue, 22 (2) ,41 (2001).

[9] Davis,  A.P., Green, D.L., Photocatalytic oxidation of cadmium-EDTA with titanium dioxide, Environ. Sci.Technol., 33, 609 (1999).

[10] Sorensen, M., Zurell, S., Frimmel, F.H., Degradation pathway of the photochemical oxidation of ethylenediaminetetraacetate (EDTA) in the UV/H2O2 process, Acta Hydrochimica ET Hydrobiologica, 26, 109 (1998).

[11] Kagaya, S., Bitoh, Y., Hasegawa, K., Photocatalyzed degradation of metal –EDTA complexes in TiO2 aqueous suspensions and simultaneous metal removal., Chem. Lett., 2, 155 (1997).

[12] Baltpurvins, K.A., Burns, R.C., Lawrance, G.A., Heavy metals in wastewater: Modelling the hydrooxide precipitation of copper (II) from waste water using lime as the precipitant , Waste management, 16, 717 (1996).

[13] Gyunner, E.A., Yakhkind, N.D., Effect of a base on the precipitation of copper (II) hydrosulfates from solution , Zhur. Neorg. Khim., 42, 222 (1997).

[14] Alguacil, F.J. Cobo, A., Solvent extraction with LIX 973N for the selective separation of copper and nickel, J. Chem. Tech. Biotechnol., 74, 467 (1999).

[15] ElAamrani, F.Z. , Kumar, A, Cortina, J. L., Sastre, A.M. , Solvent extration of copper (II) from chloride media using N- (thiocarbamoyl)benzamidine and N- benzoulthiourea derivatives, Analytica chimica Acta, 382, 205 (1999).

[16] Raghavan, R., Bhatt, C.V., Comparative study of certain ion-exchange resins for application in copper-bearing process solution., Hydrometallurgy, 50, 169 (1998).

[17] Maurelia , G.R., Zamora, C.R., Gonzalez, M.M., Guevara, B.M., Diaz, C.G., Copper removal from industrial solutions and effluents with quelate polymers and ion exchange resins., Afinidad, 55, 57 (1998).

[18] Hsu, Y.J., Kim, M.J, Tran, T., Electrochemical study on copper cementation from cyanide liquors using zinc., Electrochimica Acta, 44, 1617 (1999).

[19] Stefanowicz, T., Osinska,M., Napieralaskazagozda, S., Copper recovery  by  the   cementation method., Hydrometallurgy, 47, 69 (1997).

[20] Alexandrova, I., Iordanov, G., Trasport of nickel and copper against a concentration gradient through a carboxylic membrane , based on  poly vinyl chloride/polymethymethacrylate-co-divinylbenzene), J. Appl. Polymer sci., 63, 9 (1997)

[21] Juang, R.S., Chen, M.N., Removal of copper (II) chelates of EDTA and NTA from dilate aqueous solutions by membrane filtration., Ind.eng. Chem. Res., 36, 179 (1997).

[22] Guyon, F., Parthasarathy, N., Buffle, J., Removal of copper(II) chelates of EDTA and NTA from dilate aqueous solutions by membrane filtration., Anal. Chem. 71, 819 (1999).

[23] Goel, M., Agrawal, V., Kulkarni, A.K., Cramer, S.M., Gill, W.N., Stability and transport characteristics of reverse osmosis membranes using cyanide rinse waters., J. membrane sci., 141, 245 (1998).

[24] Cambell, D.A., Darymple, I.M. Sunderland, J. G., Tilston, D., The electrochemcical recovery of metals from effluent and process stress streams. Resources Conservation and recycling., 10, 25 (1994).

[25] Boyanov, B.S., Donaldson, J.D., Grimes, S.M. , Removal of copper and cadmium from hydro-metallurgical leach solutions by fluidized-bed electrolysis. J. Chem. Tech. Biotechnol., 41, 317 (1988).

[26] Dando. S.O.V., PhD. thesis , The removal of metals and effluent control using electrolytic techniques, Department of chemistry, Brunel university, London, (1995).