The ultramicropore biochar derived from waste distiller’s grains for wet-process phosphoric acid purification: Removal performance and mechanisms of Cr(VI)

Su, Kai; Hu, Guotao; Zhao, Tianxiang; Dong, Huinan; Yang, Yi; Pan, Hongyan; Lin, Qian

doi:10.1016/j.chemosphere.2023.140877

Cited by 11 publications

(4 citation statements)

References 57 publications

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“…Residues of medical preparations not only chemically but also in some cases biologically pollute water and despite the search for new treatment methods, the problem is very urgent 82 . However, biochar is also suitable for the purification of chemical liquids, e. g. the purification of phosphoric acid 83 . Lactic acid is purified from fermented broth using biochar 84 .…”

Section: Liquid Treatmentmentioning

confidence: 99%

Modern Use of Biochar in Various Technologies and Industries. A Review

Miroshnichenko,

Zhylina,

Shmeltser

2024

ChChT

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The article analyzes the use of biochar in various industries and the national economy (as a sorbent, fuel, reducing agent in the metallurgical industry, a component of coal coke blends, biocomposites, modification of explosives, fertilizers, etc.) It is noted that the direction of use depends on the quality and characteristics of biochar (size, physical properties, chemical composition), which are determined by the nature of the raw material, its chemical composition and carbonization temperature.

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Section: Liquid Treatmentmentioning

confidence: 99%

Modern Use of Biochar in Various Technologies and Industries. A Review

Miroshnichenko,

Zhylina,

Shmeltser

2024

ChChT

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“…These demerits can be avoided by incorporating nZVI particles onto a spongy media to improve its removal efficiency. Several sorbents impregnated by nZVI particles were utilized for capturing Cr 6+ and have been testified as activated carbon (AC) 26 , chitosans 27 , biochar 28 , bentonite 29 , carbon nanotubes 30 , humus 31 , and silica 32 . Some of them exhibit low removal efficiencies and costly and tedious synthesis procedures.…”

Section: Introductionmentioning

confidence: 99%

Hexavalent chromium ion removal from wastewater using novel nanocomposite based on the impregnation of zero-valent iron nanoparticles into polyurethane foam

Saad,

Abd-Elhafiz,

Ahmed

et al. 2024

Sci Rep

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In this study, we developed a novel nanocomposite, polyurethane foam impregnated with zero-valent iron nanoparticles (PU@nZVI), for the effective removal of chromium(VI) from various water sources. The characterization of nanocomposite (PU@nZVI) was performed by XRD, SEM–EDS, TEM and FT-IR techniques. Using the response surface methodology, we optimized the removal conditions, achieving an optimal pH of 2 and a dose of 0.5 g/L. The PU@nZVI demonstrated an excellent maximum adsorption capacity of 600.0 mg/g for Cr6+. The adsorption kinetics and isotherms were best described by the pseudo-second-order model and the Freundlich isotherm, respectively. Significantly, the nanocomposite removed 99.98% of Cr6+ from tap water, 96.81% from industrial effluent, and 94.57% from treated sewage wastewater. Furthermore, the PU@nZVI maintained its efficiency over five adsorption–desorption cycles, highlighting its reusability. These results suggest that the PU@nZVI nanocomposite is a highly efficient and sustainable option for chromium(VI) removal in water treatment applications.

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“…Photocatalysis [12], Electrochemical [13]. Precipitation [14], Microbial treatment [15], Flotation [16] adsorption [17] and plasma destruction [18] are the most common methods. Due to complexity and economic reasons, most of the mentioned approaches are not proper for removing Cr(VI) except adsorption.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Adsorption of Cr(VI) on Activated Carbon Prepared from Walnut Shells: Combining Response Surface Methodology with Computational Calculation

Yazid,

Bouzid,

El mouchtari

et al. 2024

Clean Technol.

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Walnut shells were used to produce highly microporous activated carbon. The prepared activated walnut shells were found to be an efficient adsorbent for removing Cr(VI). The study used the response surface methodology to investigate four independent variables effect: Cr(VI) concentration, pH, AC-Ws dose, and temperature on the Cr(VI) removal efficiency, which was studied in the concentration range of 0.1 to 0.3 g/L, 4 to 10, 15 to 35 °C and 1 to 5 mg/L, respectively. Through experiments designed, the optimum conditions were determined to be 4, 0.23 g/L, 298 k, and 2 g/L, respectively. At these conditions, the efficiency of removal was found to be 93%. The thermodynamic study of the adsorption process showed a spontaneous and exothermic nature. The kinetic model that explains the experimental data is the pseudo-second-order model. Furthermore, the Langmuir isotherm model was estimated to be an excellent representation of the equilibrium data. Quantum calculations and NCI analyses were also performed to get more light on the adsorption mechanism of the Cr(VI) atom and its complex form on the prepared AC-Ws surface.

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The ultramicropore biochar derived from waste distiller’s grains for wet-process phosphoric acid purification: Removal performance and mechanisms of Cr(VI)

Cited by 11 publications

References 57 publications

Modern Use of Biochar in Various Technologies and Industries. A Review

Modern Use of Biochar in Various Technologies and Industries. A Review

Hexavalent chromium ion removal from wastewater using novel nanocomposite based on the impregnation of zero-valent iron nanoparticles into polyurethane foam

Insights into the Adsorption of Cr(VI) on Activated Carbon Prepared from Walnut Shells: Combining Response Surface Methodology with Computational Calculation

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