Hexavalent chromium removal from water: adsorption properties of in natura and magnetic nanomodified sugarcane bagasse

Abilio, Thais Eduarda; Soares, Beatriz Caliman; José, Julia Cristina; Milani, Priscila Aparecida; Labuto, Geórgia; Carrilho, Elma Neide Vasconcelos Martins

doi:10.1007/s11356-020-11726-8

Cited by 33 publications

(17 citation statements)

References 57 publications

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“…In fact, when the removal of Cr (VI) by a magnetic C obtained by hydrothermal method, from peanut hulls 16 (MPC‐HDA), is compared with the results obtained in this work for magnetic Cs produced by the same method from SB (MCN‐SB) or of glucose (MCN‐GLU‐HT), it was verified that despite the similar values of surface area, the removal occurred more significantly for MPC‐HDA, applied at pH 2.0 ( q e = 97.9 mg g −1 , S BET = 62.4 m 2 g −1 ) than for MCN‐SB ( q e = 0.7 mg g −1 , S BET = 53.0 m 2 g −1 ) or MCN‐GLU‐HT ( q e = 1.2 mg g −1 ; S BET = 90.0 m 2 g −1 ), both applied at pH 5.0. However, magnetic Cs obtained from the chemical coprecipitation method have Cr (VI) removal capacities closer to the materials produced in this work, such as Fe 3 O 4 ‐nanomodified SB 56 (0.3 mg g −1 ) and magnetic graphene oxide 55 (6.0 mg g −1 ), even though the material was applied in acidic media, respectively at pH 1.0 and 2.0.…”

Section: Resultsmentioning

confidence: 54%

“…The chromium removal capacities obtained in this study were compared with those obtained with other magnetic nanocomposites, 10,11,15,16,19,54,55,56 as can be seen in Table 6. Magnetic Cs prepared via pyrolysis have high removal capacities, mainly due to the large surface area, as reported for magnetic Cs from cellulose 10 (q e = 278.8 mg g −1 , S BET = 136.3 m 2 g −1 ), activated-sludge 15 (q e = 203.0 mg g −1 , S BET = 114.2 m 2 g −1 ), termite feces 19 (q e = 49.0 mg g −1 , S BET = 699.0 m 2 g −1 ) and melamine 11 (q e = 7.5 mg g −1 , S BET = 56.2 m 2 g −1 ).…”

Section: Characterization Of the Magnetic Nanocomposites As Adsorbentsmentioning

confidence: 99%

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Valorisation of sugar cane bagasse using hydrothermal carbonisation in the preparation of magnetic carbon nanocomposite in a single‐step synthesis applied to chromium adsorption

Laranja

Júnior

Nogueira

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Sugar cane bagasse (SB) is a by‐product of the sugar cane industry, and is obtained on a large scale. In this paper, SB was used as a source of carbon for preparing a magnetic carbon nanocomposite (MCN‐SB) through one‐step hydrothermal carbonisation (HTC), in the presence of iron (III) nitrate. By way of comparison, SB was replaced by glucose in HTC (MCN‐GLU), and a thermal treatment of this material was then performed under an N2 atmosphere (MCN‐GLU‐HT). The physical and chemical properties of the nanocomposites were assessed, and the magnetic samples were applied as adsorbents. RESULTS MCN‐SB and MCN‐GLU are composed of iron oxide nanoparticles embedded in carbonaceous matrix which also contain oxygenated groups. The MCN‐SB sample was already magnetic after HTC, showing a magnetization saturation (Ms) of 5.0 emu g−1, due to the presence of magnetite, whereas MCN‐GLU consisted of hematite and required additional thermal treatment (HT) to acquire magnetic properties, with MCN‐GLU‐HT showing an Ms of 30.5 emu g−1. In turn, the mesoporous structure and higher specific surface area (SSA) of MCN‐GLU‐HT (SSA 90 m2 g−1) than MCN‐SB (SSA 53 m2 g−1) was a causative factor for its higher capacity of hexavalent chromium [Cr (VI)] removal (939 μg g−1), when compared to MCN‐SB (768 μg g−1), which has a nonporous structure. CONCLUSION The results suggest that SB can be reused, by means of HTC, for the preparation of a magnetically recoverable adsorbent, showing good adsorption properties. © 2022 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 54%

Section: Characterization Of the Magnetic Nanocomposites As Adsorbentsmentioning

confidence: 99%

Valorisation of sugar cane bagasse using hydrothermal carbonisation in the preparation of magnetic carbon nanocomposite in a single‐step synthesis applied to chromium adsorption

Laranja

Júnior

Nogueira

et al. 2022

J of Chemical Tech & Biotech

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“…In our previous works (Labuto et al 2018 ; Debs et al 2019 ; José et al 2019 ; Barbosa et al 2021 ; Carvalho et al 2021 ; Abilio et al 2021 ), we have demonstrated the potential of magnetic nanocomposites to remove contaminants in aqueous medium and the feasible separation of the supernatant from the adsorbent. To use AC-NP for pesticide removal in complex matrices, adsorption assays were performed in sugarcane juice.…”

Section: Resultsmentioning

confidence: 78%

Removal of the pesticide thiamethoxam from sugarcane juice by magnetic nanomodified activated carbon

Freitas

Barbosa

Labuto

et al. 2022

Environ Sci Pollut Res

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The removal of the neonicotinoid and systemic pesticide thiamethoxam (TMX) from water and sugarcane juice by magnetic nanomodified activated carbon (AC-NP) is proposed. This adsorbent was synthesized and characterized by FTIR, XRD, and SEM, and TMX was quantified by high-performance liquid chromatography coupled to a diode array detector (HPLC–DAD). The AC-NP was efficiently synthesized using a co-precipitation method and the impregnation of magnetite (NP) in the activated carbon (AC) was assessed by the crystalline planes found in the AC-NP structure shown in the XRD diffractograms. The AC-NP FTIR analysis also indicated predominant bands of Fe–O stretching of the magnetite at 610–570 cm −1 . Functional groups in AC and AC-NP were identified by absorption bands at 3550 and 1603 cm −1 , characteristic of O–H and C = C, respectively. The TMX adsorption kinetics in sugarcane juice was the pseudo-second-order type with r 2 = 0.9999, indicating a chemical adsorption process. The experimental sorption capacity ( SC exp ) for both TMX (standard) and TMX-I (insecticide) by AC-NP were 13.44 and 42.44 mg/g, respectively. Seven non-linear isotherm models (Langmuir, Freundlich, Dubinin-Radushkevich, Toth, Hill, Sips, and Redlich-Peterson) were fitted to the experimental adsorption data of TMX and TMX-I by AC-NP. Considering the standard error (SE), Freundlich, Langmuir, and Sips were the most appropriate models to describe the TMX adsorption, and Hill’s best adjusted to TMX-I experimental data. The chromatographic method was highly satisfactory due to its high selectivity and recovery (91–103%). The efficiency of AC-NP in the sorption of TMX was confirmed by the excellent values of SC exp and sorption kinetics.

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“…The pHPZC is the pH value at which the adsorbent's total surface charge is zero. 25 A pH-drift approach was used to determine the pHpzc of the Alg@PANI beads. 26 The sample was measured in NaCl electrolyte solutions of varying ionic strength (0.1, 0.01 and 0.001 mol/L).…”

Section: Experimental Designmentioning

confidence: 99%

Use of experimental design to evaluate the adsorption of chromium (VI) by alginate/polyaniline beads

Abdelmajid¹,

Benkhaled

Attar

et al. 2022

JSCS

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Within, low-cost decorated sodium alginate beads with polyaniline (Alg@PANI beads) were easily prepared using a cross-linking method, and employed for the adsorption of Cr(VI) from aqueous solutions. The effect of several influencing parameters, including temperature, contact time, Cr(VI) con-centration, and adsorbent dosage, was investigated and optimized using central composite design (CCD) under response surface methodology (RSM). The analysis of variance (ANOVA) of the quadratic model and the analyzed model revealed that models were statistically significant, with a low P-value (<0.0001) and a higher correlation coefficient value (R2 = 0.93). The optimum parameters for total adsorption were as follows: adsorbent dose = 0.027 g, pH 2, contact time = 45 min, temperature = 38 ?C, and Cr(VI) concentration = 29.24 ppm. The findings of this study indicate that the prepared Alg@PANI beads could be used effectively to remove Cr(VI) ions from aqueous solutions.

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Hexavalent chromium removal from water: adsorption properties of in natura and magnetic nanomodified sugarcane bagasse

Cited by 33 publications

References 57 publications

Valorisation of sugar cane bagasse using hydrothermal carbonisation in the preparation of magnetic carbon nanocomposite in a single‐step synthesis applied to chromium adsorption

Valorisation of sugar cane bagasse using hydrothermal carbonisation in the preparation of magnetic carbon nanocomposite in a single‐step synthesis applied to chromium adsorption

Removal of the pesticide thiamethoxam from sugarcane juice by magnetic nanomodified activated carbon

Use of experimental design to evaluate the adsorption of chromium (VI) by alginate/polyaniline beads

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