Advancing the development of nanocomposite adsorbent through zinc-doped nickel ferrite-pinecone biochar for removal of chromium (VI) from wastewater

Masuku, Makhosazana; Nure, Jemal Fito; Atagana, Harrison I.; Hlongwa, Ntuthuko; Nkambule, Thabo T.I.

doi:10.1016/j.scitotenv.2023.168136

Cited by 27 publications

(6 citation statements)

References 89 publications

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“…According to the data of Figure S2, NCs presented here show pH pzc at higher pH (between 8 and 8.5). This demonstrates that the synthesis conditions as well as the composition of the NCs greatly determine the pH pzc . Besides, the occurrence of only one pH pzc suggests that a NC different from their precursors remained formed by any of the explored synthetic pathways, which means that different interactions between both components (M and Z) take place during the preparation independent of the selected route.…”

Section: Resultsmentioning

confidence: 93%

“…This demonstrates that the synthesis conditions as well as the composition of the NCs greatly determine the pH pzc . 56 Besides, the occurrence of only one pH pzc suggests that a NC different from their precursors remained formed by any of the explored synthetic pathways, which means that different interactions between both components (M and Z) take place during the preparation independent of the selected route. These findings are consistent with previous works devoted to the synthesis of diverse M-based NCs.…”

Section: ζ-Potentialmentioning

confidence: 99%

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Zinc Oxide/Iron Oxide Nanocomposites for Photodegradation and Adsorption of Pollutants in Water

Pérez Adassus,

Spetter,

Mansilla

et al. 2024

ACS Appl. Nano Mater.

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Section: Resultsmentioning

confidence: 93%

Section: ζ-Potentialmentioning

confidence: 99%

Zinc Oxide/Iron Oxide Nanocomposites for Photodegradation and Adsorption of Pollutants in Water

Pérez Adassus,

Spetter,

Mansilla

et al. 2024

ACS Appl. Nano Mater.

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“…Different sorbents have already been used for Cr removal. Recently, biochar@spinel ferrite nanocomposites have been developed for Cr sorption from tannery industrial wastewater (Fito et al 2022 , 2023 ; Masuku et al 2024 ). Fito et al ( 2022 ) advises that the surface of spinel ferrites needs to be coated with biochar to improve the surface stability and increase the sorption capacity of pollutants.…”

Section: Introductionmentioning

confidence: 99%

Removal of chromium(III) from contaminated waters using cobalt ferrite: how safe is remediated water to aquatic wildlife?

Almeida,

Cardoso,

Tavares

et al. 2024

Environ Sci Pollut Res

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The release of hazardous elements by industrial effluents to aquatic ecosystems is a potential threat to the environment. Chromium (Cr) is one of the elements whose levels in several freshwater ecosystems should be reduced to promote water reuse. In recent years, magnetic materials have gained increasing interest as sorbents because of their easy removal from treated water through magnetic separation. In this study, colloidal cobalt ferrite (CoFe2O4) particles were investigated as magnetic sorbents for chromium-aqueous chemical species. The oxidative stress responses of Mytilus galloprovincialis mussels exposed to 200 μg/L of Cr, resembling remediated water, were evaluated. More than 95% of Cr was removed from contaminated solutions by CoFe2O4 aqueous suspensions at pH 6 and pH 10. The kinetics of sorption experiments were examined using pseudo-1st order, pseudo-2nd order and Elovich models to evaluate which mathematical model has a better adjustment to the experimental data. The present study revealed that the levels of Cr that remained in remediated water induced limited biochemical changes in mussels, being considered safe for aquatic systems. Overall, the use of cobalt ferrite–based sorbents may constitute a promising approach to remediate contaminated water.

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“…Due to the severe environmental and potential health risks caused by chromium-containing wastes, many researchers have worked on removing toxic chromium species from tannery wastewater bodies [16][17][18][19]. To keep our environment safe from pollution and to reduce health risks for workers in tannery industries, many attempts were made to avoid the application of chromium compounds in tanning https://doi.org/10.31881/TLR.2024.036 processes.…”

Section: Introductionmentioning

confidence: 99%

A New Synthesis Method and Characterization of Graphene Oxide Nanocomposites for the Leather Tanning Process

Chakma,

Biswas,

Abdulla-Al-Mamun

et al. 2024

Text Leather Rev

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Environmental pollution caused by wastes generated from chrome tan is a major concern nowadays. This study aimed to develop an eco-friendly alternative tanning agent using graphene oxide (GO) based nanocomposite materials. GO was synthesized by a new approach with modification of the Hummers method. Two types of GO-based nanocomposites, GO-TiO2 (GT) and GO-TiO2-PEG (GTP) were prepared by adding TiO2 nanoparticles and polyethylene glycol (PEG) as surface modifiers. They were successfully applied to leather tanning processes at different concentrations (2%, 4%, and 6%). Both synthesized GO, GO-nanocomposites, and the resulting tanned leathers were characterized by Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Fourier-transform Infrared Spectroscopy (FT-IR). Different physico-mechanical properties of leathers tanned with nanocomposites were evaluated and the results were compared with chrome-tanned leathers. The tensile strength of chrome-tanned leather was 223 (kg/cm) whereas the maximum tensile strength was found at 228 (kg/cm) and 233 (kg/cm) in 6% GO-TiO2 and GO-TiO2-PEG tanned leathers respectively. The environmental pollution impact of the effluents generated by the new tanning process was assessed. The COD of effluents generated from chrome tanning was 4800 ppm which was significantly reduced to 2400-1440 ppm and 2880-1920 ppm when GO-TiO2 (GT) and GO-TiO2-PEG (GTP) were applied in leather tanning respectively. The TDS and BOD were found at 183.8 and 200 ppm in conventional chrome-tanned wastewater which were significantly reduced to the range of 47.5-18.3 and 100-50 ppm respectively in liquid wastes obtained from the GO-composite tanning process. The maximum reduction of COD, BOD, TDS, and TSS in leather waste liquid was found with the application of 2% GO-nanocomposites in tanning. The results revealed that leathers tanned with nanocomposites possess characteristic properties which were very similar to those observed in chrome-tanned leathers whereas the new tanning agents drastically reduced the intensity of pollutants in leather effluents. The application of new nanocomposites in the leather tanning process is an innovative effort. This new nanocomposite-tanning method showed minimal consequences regarding environmental pollution with the generation of less toxic effluents from the respective tanning process.

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Advancing the development of nanocomposite adsorbent through zinc-doped nickel ferrite-pinecone biochar for removal of chromium (VI) from wastewater

Cited by 27 publications

References 89 publications

Zinc Oxide/Iron Oxide Nanocomposites for Photodegradation and Adsorption of Pollutants in Water

Zinc Oxide/Iron Oxide Nanocomposites for Photodegradation and Adsorption of Pollutants in Water

Removal of chromium(III) from contaminated waters using cobalt ferrite: how safe is remediated water to aquatic wildlife?

A New Synthesis Method and Characterization of Graphene Oxide Nanocomposites for the Leather Tanning Process

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