Effective Removal of Cr(VI) from Aqueous Solution Using Modified Orange Peel Powder: Equilibrium and Kinetic Study

Liang, Lu; Wang, Q.; Xi, Fenfen; Tan, W. S.; Zhang, Y. T.; Cheng, Leilei; Wu, Qi-Zhen; Xue, Yingwen; Meng, Xianglong

doi:10.46488/nept.2020.v19i04.005

Cited by 5 publications

(3 citation statements)

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“…Moreover, according to the value of R L , the adsorption of Cr(VI) onto PSD was favorable [ 15 ]. This result was in accordance with other reports obtained by Liang and Tsamo [ 27 , 39 ].…”

Section: Resultssupporting

confidence: 94%

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Huang

Pan

et al. 2022

BMC Chemistry

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This study was aimed to evaluate the performance of DESs functionalized peanut shell (PSD) as biosorbent for removing Cr(VI) from water. The effects of pretreatment, initial concentration, adsorption temperature, kinetics, adsorption isotherm, and thermodynamics were investigated. Scanning electron microscopy (SEM) and Point of Zero charge (pHpzc) techniques were used for characterization of the adsorbents. The results showed that the rigid structure of peanut shell was broken down after DESs modification and the point of zero charge was 6.02 for peanut shell and 6.84 for PSD, which exhibited a slightly acid character. Based on the comparisons of linear and nonlinear analysis of four kinetic models and four isotherms, the pseudo-second-order kinetic model was found to be suitable for describing the adsorption process. The presence of a boundary effect was observed within the range of research, indicating that internal diffusion was not the only rate-controlling step. The equilibrium data were well represented by the Langmuir model rather than the Freundlich, Temkin, and Dubinin–Radushkevich models. The maximum capacity derived was 5.36 mg g−1. Changes in Gibb’s free energy, enthalpy, and entropy revealed that Cr(VI) adsorption onto modified peanut-shell powders was a spontaneous and endothermic process. However, the highest desorption efficiency was only 8.77% by using NaOH as a desorbing agent. Graphical abstract

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“…Moreover, according to the value of R L , the adsorption of Cr(VI) onto PSD was favorable [ 15 ]. This result was in accordance with other reports obtained by Liang and Tsamo [ 27 , 39 ].…”

Section: Resultssupporting

confidence: 94%

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Huang

Pan

et al. 2022

BMC Chemistry

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“…Citrus sinensis commonly known as sweet orange, mainly contains cellulose, hemicellulose, pectin, lignin, chlorophyll pigments, and other low molecular weight hydrocarbons. 20 These chemical constituents have anionic functional groups on their surface. These functional groups contribute to the negative surface charge.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Lead Removal by Activated Citrus Sinensis Biochar Impregnated with Calcium Alginate Beads

Kachhwaha,

Kumari,

Giri

et al. 2023

Orient. J. Chem

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This study introduces an innovative method of using activated carbon derived from orange peels incorporated into calcium alginate beads to remove lead from synthetic water efficiently. This novel approach demonstrates remarkable effectiveness in addressing lead pollution in water. Established techniques such as SEM and FTIR were employed to characterize the adsorbents created in the laboratories. Batch studies confirmed the lead adsorbed were conducted to evaluate the efficiency of lead removal, with the highest removal efficiencies achieved at pH 6.5 (90.3%), an adsorbent dose of 2 mg (90.3%), a contact time of 50 minutes (92.3%), and an initial lead solution concentration of 20 ppm (93.2%). The study employed various adsorption models, including Langmuir, Freundlich, and Tempkin models. The Langmuir model exhibited an excellent fit to the adsorption isotherm at 60 °C, as indicated by a high linear regression correlation coefficient. For the bioadsorption process, pseudo-second-order kinetics fits well (R2 = 0.9992). The analytical results verify that activated carbon from discarded orange peels and calcium alginate beads effectively removes Pb, offering an encouraging solution for water purification challenges.

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“…Few bio-adsorbents reported by the researchers are grape-bagasse, mango leaves, orange waste etc. Modified Orange Peel Powder (MOPP) in which orange peel powder is combined by ethylenediamine suggested a better efficiency of adsorption as compared to raw orange peel have also been reported [7]. It has been observed that a modification in the bio-adsorbents by the addition of a few compounds like sulphur, polyamines and esters can improve the efficiency of the adsorption [8].…”

Section: Introductionmentioning

confidence: 99%

Detection prediction and mapping of Chromium through QGIS and adsorption of hexavalent Chromium by modified bio-adsorbents: kinetic and adsorption study

Tripathi

Chaurasia

Sharma

2021

Innov. Infrastruct. Solut.

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Toxicity due to the presence of heavy metals in ground and surface water due to the release of effluents from industries holds the potency to cause temporary or permanent damage to the living organisms in the near vicinity of these industries. This paper aims to assess the vulnerability of groundwater resources owing to its contamination in Banthar Industrial Area. Using DRASTIC model in combination with Quantum Geographic Information System (QGIS), a groundwater vulnerability map was developed, which indicated that the dispersal of Chromium was in the range of 300 -1000 μg/l. In order to study the impact of Chromium dispersion, the authors proposed a batch adsorption testing of the Hexavalent Chromium (Cr (VI)) using different bio-adsorbent materials, keeping a pH range of 3 -9 and the contact time between 0-80 minutes. Adsorption isotherms and Kinetic studies were also considered. All adsorbents followed the Langmuir isotherm (R 2 > 0.986), whereas Temkin isotherm stated the affinity of the adsorbents for the Cr (VI). The reactions between Chromium and the bio-adsorbents were found to follow pseudo-second order kinetics, which indicated that the reactions were exothermic. The results proposed that a modification in the bio-adsorbents caused an enhancement in the percent adsorption of Cr (VI) in comparison to the natural available bio-adsorbents.

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Effective Removal of Cr(VI) from Aqueous Solution Using Modified Orange Peel Powder: Equilibrium and Kinetic Study

Cited by 5 publications

References 0 publications

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Evaluation of Lead Removal by Activated Citrus Sinensis Biochar Impregnated with Calcium Alginate Beads

Detection prediction and mapping of Chromium through QGIS and adsorption of hexavalent Chromium by modified bio-adsorbents: kinetic and adsorption study

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