Apatitic tricalcium phosphate powder: High sorption capacity of hexavalent chromium removal

Elouahli, Abdelaziz; Zbair, Mohamed; Anfar, Zakaria; Ahsaine, Hassan Ait; Khallok, Hamza; Chourak, Rajaa; Hatim, Z.

doi:10.1016/j.surfin.2018.09.006

Cited by 32 publications

(10 citation statements)

References 40 publications

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“…Given the FTIR of HTC@ANS-200, BPA, and diuron molecule (Figs. 15,16), the interaction with the functional groups (adsorbate/adsorbent) may be involved in the adsorption process [73,74]. It is noted that weak interactions could change the bond lengths or energies and then affect vibration and rotation of molecules.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Zbair

Bottlinger

Ainassaari

et al. 2018

Waste Biomass Valor

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101

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Hydrochar derived from Argan nut shell (ANS) was synthesized and applied to remove bisphenol A (BPA) and diuron. The results indicated that the hydrochar prepared at 200 °C (HTC@ANS-200) possessed a higher specific surface area (42 m 2 /g) than hydrochar (HTC@ANS-180) prepared at 180 °C (17 m 2 /g). The hydrochars exhibited spherical particles, which are rich in functional groups. The HTC@ANS-200 exhibited high adsorption efficiency, of about 92% of the BPA removal and 95% of diuron removal. The maximum Langmuir adsorption capacities of HTC@ANS-200 at room temperature were 1162.79 mg/for Bisphenol A and 833.33 mg/g for diuron (higher than most reported adsorbents). The adsorption process was spontaneous (− ΔG°) and exothermic (− ΔH°). Excellent reusability was reclaimed after five cycles, the removal efficiency showed a weak decrease of 4% for BPA and 1% for diuron. The analysis of Fourier transforms infrared spectrometry demonstrated that the aromatic C=C and OH played major roles in the adsorption mechanisms of BPA and diuron in this study. The high adsorption capacity was attributed to the beneficial porosity (The pore size of HTC@ANS-200 bigger than the size of BPA and diuron molecule) and surface functional groups. BPA and diuron adsorption occurred also via multiple adsorption mechanisms, including pore filling, π-π interactions, and hydrogen bonding interactions on HTC@ANS-200. Statement of NoveltyTo our knowledge, this is the first paper introduces a new technique to produce hydrochar from argan nut shell and its studies as an adsorbent for the removal of bisphenol A and diuron. This study does not only open up a novel way to recycle argan nut shell but also presents a beneficial approach to synthesize low-cost materials for wastewater treatment.

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Section: Adsorption Mechanismmentioning

confidence: 99%

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Zbair

Bottlinger

Ainassaari

et al. 2018

Waste Biomass Valor

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101

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“…Renewability is an essential concern to evaluate the adsorbent performance for wastewater treatment. 14,87 In order to distinguish the renewability of BC-500, the used BC-500 was washed out and then reused in the new experiments to evaluate its cycle performance. In this work, 0.5 M HCl and ethanol were used for Pb 2+ /BC-500 and p-nitrophenol/BC-500 regeneration, respectively.…”

Section: Langmuir Isothermmentioning

confidence: 99%

Reusable bentonite clay: modelling and optimization of hazardous lead andp-nitrophenol adsorption using a response surface methodology approach

2019

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“…In soils with a pH of 5.5, Cr(III) cations are precipitated from the solution and, unlike Cr(VI) cations, are sparingly soluble. Cr(III) sorption increases, whereas Cr(VI) sorption decreases with a rise in soil acidity (Elouahli et al 2018). In the present experiment, calcium oxide led to the greatest increase in soil pH relative to the control treatment.…”

Section: Discussionmentioning

confidence: 99%

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

Radziemska

Wyszkowski

Bęś

et al. 2019

Environ Sci Pollut Res

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The effect of soil amendments, i.e., compost, zeolite, and calcium oxide, on the chemical properties of soil contaminated with Cr(III) and Cr(VI) and the uptake of selected heavy metals by spring barley ( Hordeum vulgare L.) and maize ( Zea mays L.) was determined in a pot experiment. The content of all investigated heavy metals in the tested plants varied significantly in response to the tested soil amendments and increasing concentrations of Cr(III) and Cr(VI). Compost, zeolite, and calcium oxide contributed to an increase in the average yield of the aerial parts of maize plants only in treatments contaminated with Cr(III). The concentrations of Cr, Zn, and Ni in the aerial parts of spring barley and maize were higher in treatments contaminated with Cr(III) than in treatments contaminated with Cr(VI). Calcium oxide induced a significant increase in soil pH relative to the control treatment. In treatments without soil amendments, the average Cr content of soil was higher in pots contaminated with Cr(VI). The concentrations of Zn and Cu in non-amended treatments were negatively correlated with increasing doses of Cr(III) and Cr(VI). Calcium oxide decreased the average content of Cr, Cu, and Ni in all experimental variants. Compost increased the average content of Zn in treatments contaminated with Cr(III) and Cr(IV) relative to non-amended soil.

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Apatitic tricalcium phosphate powder: High sorption capacity of hexavalent chromium removal

Cited by 32 publications

References 40 publications

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Reusable bentonite clay: modelling and optimization of hazardous lead andp-nitrophenol adsorption using a response surface methodology approach

The applicability of compost, zeolite and calcium oxide in assisted remediation of acidic soil contaminated with Cr(III) and Cr(VI)

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