LAPSE:2019.0982
Published Article
LAPSE:2019.0982
Coffee Pulp: A Sustainable Alternative Removal of Cr (VI) in Wastewaters
Dora Luz Gómez Aguilar, Juan Pablo Rodríguez Miranda, Javier Andrés Esteban Muñoz, Jhon Fredy Betancur P.
September 5, 2019
Currently, agricultural waste is proposed as a sustainable alternative in the removal of heavy metals present in industrial wastewater, to fulfill some of the goals proposed in the Sustainable Development Goals stated for the 2030 Agenda, in particular in Sections 3.9 and 6.9. Considering this context, the coffee pulp (Castilla variety) of Caldas municipality (Colombia) was used in study for the removal of one of the most toxic chemical species of chromium: Cr (VI). Therefore, the agricultural residue was subjected to a bromatological characterization, determination of the lignocellulosic composition and elucidation of characteristic organic functional groups by IR spectrophotometry. Additionally, the optimal parameters for contaminant removal were identified, regarding particle size, biomass quantity, optimum pH, stirring time, temperature, adsorption kinetics, zero charge potential (pHpzc) and adsorption isotherms, to analyze the kinetic model that fitted the process, the explanation of the possible adsorption mechanism between the contaminant, the surface of the coffee pulp and the capacity of maximum adsorption, respectively. Finally, the innovation of the research is discussed considering two criteria: First, when a mixture was made in different proportions between two agricultural residues (coffee pulp and plantain pseudostem) to show if there was an increase in the removal of the contaminant under the same optimal conditions found experimentally; and the second criterion, the comparison of the maximum adsorption capacity, with the percentages of removal carried out by other authors using the pulp of unmodified coffee.
Keywords
agricultural residues, coffee pulp (CP), heavy metals, hexavalent chromium, industrial wastewater (IWW), plantain pseudo stem (PP), Sustainable Development Goals (SDG)
Suggested Citation
Gómez Aguilar DL, Rodríguez Miranda JP, Esteban Muñoz JA, Betancur P. JF. Coffee Pulp: A Sustainable Alternative Removal of Cr (VI) in Wastewaters. (2019). LAPSE:2019.0982
Author Affiliations
Gómez Aguilar DL: Chemistry Department, National Pedagogical University, Bogotá 110231, Colombia
Rodríguez Miranda JP: Engineering Department, University Distrital Francisco José de Caldas (UDFJC), Bogotá 110231, Colombia
Esteban Muñoz JA: Chemistry Department, National Pedagogical University, Bogotá 110231, Colombia
Betancur P. JF: Manizales University, Manizales 170003, Colombia [ORCID]
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Journal Name
Processes
Volume
7
Issue
7
Article Number
E403
Year
2019
Publication Date
2019-07-01
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7070403, Publication Type: Journal Article
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LAPSE:2019.0982
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doi:10.3390/pr7070403
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Sep 5, 2019
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Calvin Tsay
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