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Evaluation of humic substances removal from leachates originating from solid waste landfills in Rio de Janeiro State, Brazil.

Abstract

This study aimed to evaluate the use of coagulation/flocculation and Fenton processes for the removal of the recalcitrant component, in particular humic substances, from two different leachates generated in the Gericinó and Gramacho landfills in Rio de Janeiro State (Brazil). A coagulation/flocculation process, using FeCl3·6H2O as the coagulant, was applied to the two leachate samples. In the case of the leachate from Gericinó landfill, the treatment removed 93% of color, 71% of TOC, 69% of COD, 76% of HS, 73% of humic acids (HA) and 82% of fulvic acids (FA). In addition, there was a 75% reduction in the absorbance at 254 nm, using 3,000 mg L-1 of coagulant. In the case of the leachate from Gramacho landfill, the treatment removed 91% of color, 69% of TOC, 68% of COD, 77% of HS, 75% of HA and 80% of FA. In addition, there was a 70% reduction in the absorbance at 254 nm using the same concentration of coagulant (3,000 mg L-1). The Fenton processes, using FeSO4·7H2O and H2O2 in a ratio of 1:5, were also applied to the two leachate samples. In the case of the Gericinó leachate, the Fenton treatment removed 95% of color, 75% of TOC, 68% of COD, 82% of HS, 77% of HA and 93% of FA. In addition, there was a 93% reduction in the absorbance at 254 nm. In the case of the Gramacho leachate, the Fenton treatment removed 93% of color, 73% of TOC, 71% of COD, 81% of HS, 76% of HA, 90% of FA, and there was an 84% reduction in the absorbance at 254 nm. The results of humic substances, color, organic matter and aromatic organic matter (absorbance at 254 nm) demonstrate that the coagulation/flocculation and Fenton processes were efficient in the removal of recalcitrant organic matter from landfill leachates.

Authors+Show Affiliations

a Department of Inorganic Processes, School of Chemistry , Federal University of Rio de Janeiro , Rio de Janeiro , Brazil.a Department of Inorganic Processes, School of Chemistry , Federal University of Rio de Janeiro , Rio de Janeiro , Brazil.b Applied Research Management , Municipal Company of Urban Cleaning (COMLURB) , Rio de Janeiro , Brazil.c Department of Sanitary and Environment Engineering , State University of Rio de Janeiro , Rio de Janeiro , Brazil.a Department of Inorganic Processes, School of Chemistry , Federal University of Rio de Janeiro , Rio de Janeiro , Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28448748

Citation

Lima, Letícia S M S., et al. "Evaluation of Humic Substances Removal From Leachates Originating From Solid Waste Landfills in Rio De Janeiro State, Brazil." Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, vol. 52, no. 9, 2017, pp. 828-836.
Lima LSMS, De Almeida R, Quintaes BR, et al. Evaluation of humic substances removal from leachates originating from solid waste landfills in Rio de Janeiro State, Brazil. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2017;52(9):828-836.
Lima, L. S. M. S., De Almeida, R., Quintaes, B. R., Bila, D. M., & Campos, J. C. (2017). Evaluation of humic substances removal from leachates originating from solid waste landfills in Rio de Janeiro State, Brazil. Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, 52(9), 828-836. https://doi.org/10.1080/10934529.2017.1312182
Lima LSMS, et al. Evaluation of Humic Substances Removal From Leachates Originating From Solid Waste Landfills in Rio De Janeiro State, Brazil. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2017 Jul 29;52(9):828-836. PubMed PMID: 28448748.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of humic substances removal from leachates originating from solid waste landfills in Rio de Janeiro State, Brazil. AU - Lima,Letícia S M S, AU - De Almeida,Ronei, AU - Quintaes,Bianca R, AU - Bila,Daniele M, AU - Campos,Juacyara C, Y1 - 2017/04/27/ PY - 2017/4/28/pubmed PY - 2017/11/29/medline PY - 2017/4/28/entrez KW - Coagulation/flocculation KW - Fenton reaction KW - humic substances KW - landfill leachate KW - organic matter SP - 828 EP - 836 JF - Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering JO - J Environ Sci Health A Tox Hazard Subst Environ Eng VL - 52 IS - 9 N2 - This study aimed to evaluate the use of coagulation/flocculation and Fenton processes for the removal of the recalcitrant component, in particular humic substances, from two different leachates generated in the Gericinó and Gramacho landfills in Rio de Janeiro State (Brazil). A coagulation/flocculation process, using FeCl3·6H2O as the coagulant, was applied to the two leachate samples. In the case of the leachate from Gericinó landfill, the treatment removed 93% of color, 71% of TOC, 69% of COD, 76% of HS, 73% of humic acids (HA) and 82% of fulvic acids (FA). In addition, there was a 75% reduction in the absorbance at 254 nm, using 3,000 mg L-1 of coagulant. In the case of the leachate from Gramacho landfill, the treatment removed 91% of color, 69% of TOC, 68% of COD, 77% of HS, 75% of HA and 80% of FA. In addition, there was a 70% reduction in the absorbance at 254 nm using the same concentration of coagulant (3,000 mg L-1). The Fenton processes, using FeSO4·7H2O and H2O2 in a ratio of 1:5, were also applied to the two leachate samples. In the case of the Gericinó leachate, the Fenton treatment removed 95% of color, 75% of TOC, 68% of COD, 82% of HS, 77% of HA and 93% of FA. In addition, there was a 93% reduction in the absorbance at 254 nm. In the case of the Gramacho leachate, the Fenton treatment removed 93% of color, 73% of TOC, 71% of COD, 81% of HS, 76% of HA, 90% of FA, and there was an 84% reduction in the absorbance at 254 nm. The results of humic substances, color, organic matter and aromatic organic matter (absorbance at 254 nm) demonstrate that the coagulation/flocculation and Fenton processes were efficient in the removal of recalcitrant organic matter from landfill leachates. SN - 1532-4117 UR - https://www.unboundmedicine.com/medline/citation/28448748/Evaluation_of_humic_substances_removal_from_leachates_originating_from_solid_waste_landfills_in_Rio_de_Janeiro_State_Brazil_ L2 - http://www.tandfonline.com/doi/full/10.1080/10934529.2017.1312182 DB - PRIME DP - Unbound Medicine ER -