Aprovechamiento De Pelos De Vacuno Del Proceso De Pelambre Enzimático De Las Curtiembres en La Remoción De Plomo

Amorína, Carmen Carola Palomino; Parker, Rocío Vargas

doi:10.37761/rsqp.v82i2.122

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…SWWs of 25 mL of Pb(II) with an initial concentration of 100 mg•L −1 were prepared with 0.500 g of coffee pulp [30,31], and the pH of these were adjusted to 1, 2, 3 and 4 units with HNO 3 1 M in triplicate for each pH. We did not use higher pH values because Pb precipitated as Pb(OH) 2 when alkalinizing [32]. These dissolutions were stirred for 105 min at 100 RPM and then filtered on Whatman No.1 qualitative filter paper with retention of 11 µm, to determine the final concentration.…”

Section: Determination Of the Optimum Ph Of Adsorption Of Pb(ii)mentioning

confidence: 99%

“…According to Palomino et al [32] and Stumm and Morgan (1996, cited in Moreno, 2007) [42], with respect to the optimum pH exposed, it should be clarified that the chemical species of lead found in aqueous solution corresponds to Pb(II) and to a pH higher than 8 units, and based on the Pourbaix diagram, lead precipitates as Pb(OH) 2 .…”

Section: Determination Of Optimum Ph Of Pb(ii) With Cpmentioning

confidence: 99%

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Biosorption of Pb(II) Using Coffee Pulp as a Sustainable Alternative for Wastewater Treatment

et al. 2021

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The present research shows the results obtained from the biosorption process of Pb, using coffee pulp as a biosorbent in synthetic waters. To do this, the lignin and cellulose content and the percentage of removal of Pb2+ ions was determined; additionally, the sorption’s optimal variables, such as the optimum pH, the point of zero charge (pHpzc), the kinetics and the adsorption isotherm, were determined. A comparison was made with other by-products derived from coffee crops. According to the results obtained in this research, the cellulose percentage was 29.12 ± 0.22% and the lignin percentage was 19.25 ± 0.16% in the coffee pulp, the optimum pH was 2.0 units and the kinetic model, which adjusted to the biosorption’s process, was the pseudo-second order of Ho and McKay, presenting an isotherm of Langmuir’s model and pHpzc of 3.95 units. Lastly, the removal of the pollutant was 86.45%, with a capacity of maximum adsorption of 24.10 mg·g−1 obtained with a particle size of 180 µm, time of contact of 105 min and at 100 RPM. Finally, we express that (a) the coffee pulp can be used as a sustainable alternative for the removal of the pollutant mentioned in synthetic and/or industrial wastewater matrices, to meet goals 3.9 and 6.9 of the Sustainable Development Goals of the 2030 agenda, and (b) the novelty of this research is the use of an agricultural waste of easy acquisition as a sorbent, without chemical modification, since it presented a high percentage of efficiency in the removal of Pb2+ ions. In turn, the challenge of this research is implementing this green technology on a pilot, semi-industrial and/or industrial scale in wastewater treatment systems.

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Section: Determination Of the Optimum Ph Of Adsorption Of Pb(ii)mentioning

confidence: 99%

Section: Determination Of Optimum Ph Of Pb(ii) With Cpmentioning

confidence: 99%

Biosorption of Pb(II) Using Coffee Pulp as a Sustainable Alternative for Wastewater Treatment

et al. 2021

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“…This is a useful material to use in adsorption or filtration systems in the elimination of toxic compounds, due to the number of functional groups present in the main and secondary chains of proteins. 61 Biochar can be activated to improve its physical and chemical properties. Currently, there are two types of biochar activation processes: physical and chemical.…”

Section: Introductionmentioning

confidence: 99%

“…However, the use of adsorbents from waste hair valorization is interesting because of its composition, such as the presence of keratin. This is a useful material to use in adsorption or filtration systems in the elimination of toxic compounds, due to the number of functional groups present in the main and secondary chains of proteins . Biochar can be activated to improve its physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Removal of Drugs in Polluted Waters with Char Obtained by Pyrolysis of Hair Waste from the Tannery Process

et al. 2020

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The presence and final destination of pharmaceutical compounds in waters constitute one of the emerging events in current environmental chemistry. Two widely consumed compounds have been evaluated in this study, amoxicillin (AMOX) and diclofenac (DFC), at a concentration of 200 mg L –1 . The presence of both in wastewater has been verified, generating problems in ecosystems and human health. Pyrolysis of hair waste from a tannery process was performed in a fixed-bed reactor. Char was obtained at different operating temperatures (300, 350, 400, and 450 °C), which underwent a characterization of heavy metals and elemental composition. An activation process was applied to the char obtained at 450 °C by means of physicochemical processes and with two chemical agents (KOH and K 2 CO 3 ). For the removal of drugs, two separate tests were performed, one for 28 days and the other one for 4 h, to assess the efficiency and the percentage of removal. It was found that the char obtained at 450 °C is the one that removes most of both compounds: more than 90% of AMOX and more than 80% of DFC.

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Aprovechamiento De Pelos De Vacuno Del Proceso De Pelambre Enzimático De Las Curtiembres en La Remoción De Plomo

Cited by 2 publications

References 2 publications

Biosorption of Pb(II) Using Coffee Pulp as a Sustainable Alternative for Wastewater Treatment

Biosorption of Pb(II) Using Coffee Pulp as a Sustainable Alternative for Wastewater Treatment

Removal of Drugs in Polluted Waters with Char Obtained by Pyrolysis of Hair Waste from the Tannery Process

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