Characterization of Pequi (<i>Caryocar brasiliense</i>) Shells and Evaluation of Their Potential for the Adsorption of Pb<sup>II</sup>Ions in Aqueous Systems

Amorim, Dayane J.; Rezende, Hélen C.; Oliveira, Érica Lima de; Almeida, Ione Lucenir Silva; Coelho, Nívia M. M.; Matos, Túlio N.; Araújo, Cleide Sandra Tavares

doi:10.5935/0103-5053.20150304

Cited by 12 publications

(12 citation statements)

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“…It can be clearly noticed in both the adsorbents (DPS and NPS) that after adsorption there is change in intensity of peaks which indicates participation of above mentioned of functional groups in adsorption process. (Amorim et al, 2016;Dewage et al, 2018).…”

Section: Characterization Of Peanut Shellsmentioning

confidence: 99%

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Herbert

Kumar

Janardhan

2020

Water Environment Research

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In the present article, an attempt is made for simple, low-cost, and efficient removal of Auramine dye using peanut (Arachis hypogaea) shells as adsorbents. Two different forms of adsorbents distilled water washed peanut shells (DPS) and NaOH treated peanut shells (NPS) were used as adsorbents. Both the adsorbents were studied using BET, pH PZC , FTIR, SEM, TGA, and XRD characterization techniques. Adsorption parameters such as effect of contact time, pH, initial dye concentration, adsorbent dose, and temperature were also assessed. Isotherm analysis at optimum conditions showed Langmuir fitted better with a q m value of 96.15 mg/g for DPS and 294.12 mg/g for NPS; while in kinetic analysis, pseudo-second order was superior. Thermodynamics study stated that adsorption process was endothermic in nature. Overall outcomes establish that the two forms of peanut shells, DPS, and NPS were excellent in removal of Auramine dye and are low cost also as preparation cost of DPS and NPS is 68.73 INR and 106.19 INR per kg, respectively. © 2020 Water Environment Federation • Practitioner points • Removal of Auramine dye from aqueous media using different forms of peanut (Arachis hypogaea) shells as adsorbents is discussed. • q m (Langmuir) using DPS and NPS were found to be 96.15 and 294.12 mg/g, respectively. • Preparation cost of DPS was 68.73 INR per 1 kg, whereas for NPS it was 106.19 INR per 1 kg.

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Section: Characterization Of Peanut Shellsmentioning

confidence: 99%

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Herbert

Kumar

Janardhan

2020

Water Environment Research

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“…The point of zero charge (PZC) was determined according to the methodologies proposed by [27]. For the assay, 50.0 mg of absorbent biochar was mixed with 20.0 mL of 0.05 mol L -1 NaCl solution under different conditions of initial pH (pH 0 ), adjusted from 2.0 to 10.0 by the addition of 0.1 mol L -1 of HCl or NaOH solution.…”

Section: Characterization Of Adsorbent Biocharmentioning

confidence: 99%

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

Borba

Cuba

Terán

et al. 2019

Braz. arch. biol. technol.

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This study evaluated the capacity of adsorbent biochar derived from pequi husks to remove glyphosate (commercial formulation) in aqueous medium under three pH conditions (5.5, 7.0 and 8.0). This biochar presented a mean yield of 33.1% ± 2.66% and a high amount of surface particles of small dimensions endowing it with high surface area. The results showed that removal is proportional to pH increase in the range of 5.5 to 8.0. Adsorption assays performed at pH 7 and 8 fitted better to the Langmuir pseudo-first order kinetics model with fast adsorption in the first 15 to 30 minutes. The results for the acidic pH range fit none of the adopted models satisfactorily. The results obtained suggest that HIGHLIGHTS • Adsorption tests with commercial products are more realistic than with pure products • Biochar obtained from pequi husks can be used for adsorption of glyphosate • Low temperature pyrolysis produces biochar for removal of commercial glyphosate Borba, L.L.; et al

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“…Por motivos como esses tem aumentado a busca por adsorventes mais viáveis economicamente e socialmente. Uma alternativa que vem sendo estudada é o uso de biomassas para processos de biossorção que podem ser obtidas de resíduos agroindustriais (GORGULHO et al, 2010;BOAS et al, 2012;AMORIM et al, 2016).…”

Section: Introductionunclassified

DEVELOPMENT AND VALIDATION OF A SPECTROPHOTOMETRIC METHOD TO EVALUATE BIOSAFETY CAPACITY OF BARU (Dipteryx alata) PEELS

Cesarino¹,

Mulholland²,

Francisco³

2018

PTQ

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This study developed a new analytical method using Molecular Absorption Spectroscopy (MAS) to track the ion cover in adsorption solution per peel (mesocarp) of Baru (Dipteryx alata). The adsorption study was conducted at different pH and contact time (kinetic), encountering 4.0 as the best pH for adsorption experimental conditions. The variation of contact time showed a pseudo-second-order adsorption kinetic behavior. The interpretation of the isotherms allowed to approach the Langmuir model with R² of 0.918 and to determine the maximum adsorption capacity (qmáx) as 11.481 mg.g⁻¹. The characterization of biomass by MAS in the Infrared (FT-IR) identified the possible functional groups belonging to protein, fatty acids and lipids, while thermal analysis (TG-DSC) showed a greater removal of inorganic matter by the biomass washed with water. The method underwent analytical validation, being classified as specific, sensitive, linear, robust, precise and accurate, with LD (limit of detection) and LQ (limit of quantification) equal to 3.873 and 12.912 mg.L⁻¹, respectively. The results obtained demonstrated the potential use of mesocarp Baru as a natural adsorbent for copper ions in solution, opening power for future expansion and improvement of the method.

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Characterization of Pequi (Caryocar brasiliense) Shells and Evaluation of Their Potential for the Adsorption of Pb^IIIons in Aqueous Systems

Cited by 12 publications

References 1 publication

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

DEVELOPMENT AND VALIDATION OF A SPECTROPHOTOMETRIC METHOD TO EVALUATE BIOSAFETY CAPACITY OF BARU (Dipteryx alata) PEELS

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Characterization of Pequi (Caryocar brasiliense) Shells and Evaluation of Their Potential for the Adsorption of PbIIIons in Aqueous Systems

Cited by 12 publications

References 1 publication

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Use of Adsorbent Biochar from Pequi (Caryocar Brasiliense) Husks for the Removal of Commercial Formulation of Glyphosate from Aqueous Media

DEVELOPMENT AND VALIDATION OF A SPECTROPHOTOMETRIC METHOD TO EVALUATE BIOSAFETY CAPACITY OF BARU (Dipteryx alata) PEELS

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Characterization of Pequi (Caryocar brasiliense) Shells and Evaluation of Their Potential for the Adsorption of Pb^IIIons in Aqueous Systems