Reduction of COD in Nam Son landfill leachate by electro-fenton as secondary treatment after electrocoagulation pretreatment

Le Thanh Son; Le Cao Khai

doi:10.15625/2525-2518/57/6/13883

Author affiliations

Authors

Le Thanh Son Institute of Environmental Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
Le Cao Khai Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/57/6/13883

Keywords:

landfill leachate, COD reduction efficiency, electro-fenton, felt carbon, hydroxyl radical

Abstract

Landfill leachate is a high-strength wastewater that is most difficult to deal with because the fluctuating of composition and quality as well as high concentration of specific pollutants (PAH, PCBs, heavy metals) and very high ammonia nitrogen and COD concentrations. So, after a pre-treatment as electrocoagulation, over 73% of COD has been treated from Nam Son landfill leachate, however the output value of COD still exceeds the QCVN 40:2011/BTNMT, column B. So, an electro-fenton process was employed to secondarily treat Nam Son landfill leachate, after an electrocoagulation pre-treatment. This electro-fenton system used a Pt gauze anode and a commercial carbon felt cathode to electrogenerate in situ hydrogen peroxide and regenerate ferrous ion as catalyst. In this study, the effects of various operating conditions such as initial pH, concentration of Fe²⁺ catalyst, current applied on reduction of COD in Nam Son landfill leachate were examined. At the optimal condition: applied current of 1A, pH 3, Fe²⁺ concentration of 0.1m M, Na₂SO₄ concentration of 0.05 M, 77.2% COD reduction can be reached within 60 min and the output value of COD is 130.9 mg.L^-1, according to QCVN 40:2011/BTNMT, column B. The research results indicated that electro-fenton process can promise as a potential method in practice for secondary treatment of landfill leachate.

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References

MONRE - Ministry of Natural Resources and Environment. - National State of Environmental Report 2016 - Vietnam urban environment. Viet Nam Publishing house of Natural resources, Environment and Cartography. (2017) (in Vietnamese).

Wu J.J., Wu C.C., Ma H.W. and Chang C.C. - Treatment of landfill leachate by ozone based advanced oxidation processes, Chemosphere. 54 (2004) 997–1003.

Cortez S., Teixeira P., Oliveira R., Mota M. - Ozonation as polishing treatment of mature landfill leachate, Journal of Hazardous Materials. 182 (2010) 730-734.

Vedrenne M., Vasquez-Medrano R., Prato-Garcia D., Frontana-Uribe B.A., Ibanez J.G. -Characterization and detoxification of a mature landfill leachate using a combined coagulation–flocculation/photo Fenton treatment, Journal of Hazardous Materials. 205/206 (2012) 208 - 215.

Wang F., El-Din M.G., Smith D.W. - Oxidation of aged raw landfill leachate with O3 only and O3/H2O2: treatment efficiency and molecular size distribution analysis, Ozone: Science & Engineering. 26 (2004) 287 - 298.

Ilhan F., Kurt U., Apaydin O. and Gonullu M.T. - Treatment of leachate by electrocoagulation using aluminum and iron electrodes. J. Hazard. Mater. 154 (2008) 381-389.

Linares-Hernández I., Barrera-Díaz C., Roa-Morales G., Bilyeu B. and Ureña-Núñez F.-Influence of the anodic material on electrocoagulation performance, Chem. Eng. J. 148 (2009) 97-105.

Mollah M.Y., Morkovsky P., Gomes J.A, Parga J. and Cocke D.L.- Fundamentals, present and future perspectives of electrocoagulation. J. Hazard. Mater. 114 (2004) 199-210.

Le Thanh Son, Le Cao Khai, Doan Tuan Linh, Doan Thi Anh.- Effect of some effective parameters on COD Removal from Nam Son Landfill Leachate by electrocoagulation, Vietnam journal of Science and Technology. 55(5) (2017) 540-547.

Malato S., Blanco J., Maldonado M.I., Ferna´ndez-Iba´nez P., Campos A. - Optimizing solar photocatalytic mineralization of pesticides by adding inorganic oxidizing species; application to the recycling of pesticide containers, Appl. Catal. B Environ. 28 (2000) 163-174.

Boye B., Diang M.M., Brillas E. - Degradation of herbicide 4- chlorophenoxyacetic acid by advanced electrochemical oxidation methods, Environ. Sci. Technol. 36 (2002) 3030–3036.

Gözmen B., Oturan M.A., Oturan N., Erbatur O. - Indirect electrochemical treatment of bisphenol A in water via electrochemically generated Fenton’s reagent, Environ. Sci. Technol. 37 (2003) 3716–3723.

Guivarch E., Trevin S., Lahitte C., Oturan M.A. - Degradation of azo dyes in water by Electro–Fenton process, Environ. Chem. Lett. 1 (2003) 38–44.

Pushpalatha M., Krishna B.M. - Electro- Fenton Process for Waste Water Treatment. A Review. International Journal of Advance Research, Ideas and Innovations in Technology. 3(1) (2017) 439-451.

Devi S., Adishkumar S., Rajesh Banu J. - Efficiency analysis of electro-Fenton combined with coagulation process for the degradation of natural rubber latex processing and production waste waters using bench-scale reactor. Desalin. Water. Treat. 105 (2018) 132–143.

Shin Y.U., Yoo H.Y., Kim S., Chung K.M., Park Y.G., Hwang K.H., Hong S.W., Park H., Cho K., Lee J. - Sequential Combination of Electro-Fenton and Electrochemical Chlorination Processes for the Treatment of Anaerobically-Digested Food Wastewater. Environ. Sci. Technol. 51(18) (2017) 10700 - 10710.

Vergili I., Gencdal S. - Applicability of combined Fenton oxidation and nanofiltration to pharmaceutical wastewater. Desalination and Water Treatment 56(13) (2015) 1-9.

Mansour D., Fourcade F., Soutrel I., Hauchard D., Bellakhal N., Amrane A. - Relevance of a combined process coupling electro-Fenton and biological treatment for the remediation of sulfamethazine solutions – Application to an industrial pharmaceutical effluent. C. R. Chimie. 18 (2015) 39–44.

Suresh A., Minimol Pieus T., Soloman P.A. - Treatment of Landfill Leachate by membrane bioreactor and electro-fenton process. Int. J. Eng. Sci. Res. Technol. 5(8) (2016) 689-697.

Álvarez Cruz J.L., Campos Díaz E.K., Bandala E.R. and Sánchez F.L. - Landfill leachate treatment using coupled, Sequential Coagulation-flocculation and Advanced Oxidation Processes. AIMS Geosciences, 3(4) (2017) 526-537.

Pignatello J.J., Oliveros E., Mackay A. - Advanced oxidation processes for organic contaminant destruction based on the Fenton reaction and related chemistry. Crit. Rev. Environ. Sci. Technol. 36 (2006) 1–84.

Eisenhauer H.R. - Oxidation of phenolic wastes. J. Water. Pollut. Control. 36 (1964) 1117-1127.

Lunar L., Sicila D., Rubio S., Perez-Bendito D., Nickel U. - Degradation of photographic developers by Fenton's reagent: Condition optimization and kinetics for metol oxidation. Water Resour 34 (2000) 1791–1802.

Zhou M., Yu Q., Lei L., & Barton G. - Electro-Fenton method for the removal of methyl red in an efficient electrochemical system. Purif. Technol. 57(2) (2007) 380–387.

Ting W.P., Lu M.C., Huang Y.H. - Kinetics of 2,6-dimethylaniline degradation by electro-Fenton process. J. Hazard. Mater. 161(2–3) (2009) 1484–1490.

Zhou L., Zhou M., Zhang C., Jiang Y., Bi Z., Yang J. - Electro-Fenton degradation of p-nitrophenol using the anodized graphite felts. Chem. Eng. J. 233 (2013) 185–192.

Ahmadian M., Reshadat S., Yousefi N., Mirhossieni S.H., Zare M.R., Ghasemi S.R., Gilan N.R., Khamutian R. and Fatehizadeh A. - Municipal Leachate Treatment by Fenton Process: Effect of Some Variable and Kinetics. J Environ Public Health. 2013 (2013) 1-6.

Tang W.Z., Chen R.Z. - Decolorization kinetics and mechanisms of commercial dyes by H2O2/iron powder system. Chemosphere. 32(5) (1996) 947–958.

Pajootan E., Arami M., Rahimdokht M. - Discoloration of wastewater in a continuous electro-Fenton process using modified graphite electrode with multi-walled carbon nanotubes/surfactant. Sep. Purif. Technol. 30 (2014) 34–44.

Panizza M., Cerisola G. - Removal of organic pollutants from industrial wastewater by electrogeneraedFenton’s reagent. Water Res. 35 (2001) 39–87.

Neyens E., Baeyens J. - A review of classic Fenton’s peroxidation as an advanced oxidation technique.J. Hazard. Matter. 98 (2003) 33-50.

Daud Z., Hanafi N.F.M., Awang H.- Optimization of COD and Colour Removal From Landfill Leachate by Electro-Fenton Method. Australian Journal of Basic and Applied Sciences, 7(8) (2013) 263-268.