Removal of hexavalent chromium from aqueous solutions using Argania spinosa leaves

Ennoukh, F.; Brini, Lahoucine; Chafik, D.; Bouhaouss, Ahmed; Bchitou, Rahma

doi:10.5004/dwt.2019.23886

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Biosorption is a fast and reversible reaction used commonly for heavy metal recovery (Tripathi and Rawat Ranjan, 2015). Several materials have been used to recover heavy metals, such as peat, lignite and humic acids, fly ash, microbial biomass, and agricultural by-products such as soya bean hulls, walnut shells, and others (Laszlo and Dintzis, 1994;Alvarez Puebla et al, 2006;Pehlivan and Altun, 2008;Pehlivan et al, 2009;Módenes et al, 2015;Suresh Kumar et al, 2015;Darmayanti et al, 2017;Cheng et al, 2018;Ennoukh et al, 2019;Neris et al, 2019). The advantages of using a low-cost bioadsorbent are high efficiency at low cost, minimization of chemical and/or biological sludge regeneration of the biosorbent, and the possibility of metal recovery (Dai et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Rare-Earth Elements From Aqueous Solutions Using Walnut Shell

et al. 2020

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Agricultural wastes are considered as green adsorbents that can work as an alternative to recover critical and scarce metals from secondary sources. Critical elements as rare-earth elements (REEs) can be obtained from electronic wastes or tailings and could be recovered using these green alternatives. In this study, walnut shell (WS) was tested to determine whether several REEs can be efficiently retained by this green adsorbent. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetry, and differential scanning calorimetry (TG-DSC) were used to characterize WS before and after REE adsorption. Analytical performance of REE quantification was evaluated, besides adsorption capacity and isotherms that were calculated in order to determine the model that fit well to REE adsorption. ICP-OES results indicated the lowest limit of detection and quantification (LOD and LOQ) with Eu (0.08 and 0.23 ppb, respectively); nevertheless, quantification of other elements was also at the ppb level. In order to obtain the highest adsorption of metals, 75-and 2,000-µm particle sizes were studied, reaching >80% of adsorption with both sizes. Additionally, several pH values were tested in order to determine the optimum condition for maximal adsorption and adsorption capacity, noticing that pH 4 showed the best adsorption percentage (>85%, qe = 6.5-8 mg/g). The Langmuir isotherm model fitted well for the Eu, La, Sm, and Gd adsorption equilibrium. Characterization of WS was done using FTIR, TG-DSC, and SEM. FTIR analysis showed several changes in the spectra after adsorption of REE tested, but major changes were observed at the OH group, which shifted up to 31 cm −1 of wavelength. Additionally, TG-DSC showed that WS pyrolysis was divided in three stages: vaporization of moisture (about 10% of weight loss); thermal decomposition of hemicellulose, cellulose, and lignin (higher than 60% of weight loss); and high-temperature calcination of residues (<25%). Finally, SEM characterization showed empty and filled pores of different sizes in WS after metal adsorption, and a more rugged aspect was observed. This study reveals that WS is an efficient low-cost adsorbent for REEs and can be used for future recovery of these elements from secondary sources.

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Section: Introductionmentioning

confidence: 99%

Biosorption of Rare-Earth Elements From Aqueous Solutions Using Walnut Shell

et al. 2020

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“…Other interesting and promising uses of ANS are recently reported regarding the possibility of producing produce a biosorbent sawdust for the extraction of uranium and other heavy metals (Cd, As, Zn, Cu, Ni, Cr) from merchant-grade phosphoric acid (PA) in the phosphate fertilizer industry to reduce uranium concentrations in mineral fertilizers (Qamouche et al 2021), or to prepare activated carbons with high capacity for capturing CO 2 (Boujibar et al 2018). Argan leaves powder can also be used in the same industry, as it has proved to be an efficient biosorbent for hexavalent chromium (Cr(VI)) ions contaminating aqueous solutions (Ennoukh et al 2019).…”

Section: Use Of Argan Processing Waste For Biosorption and Depurationmentioning

confidence: 99%

Innovation of argan (Argania spinosa (L.) Skeels) products and byproducts for sustainable development of rural communities in Morocco. A systematic literature review

Santoro,

Ongoma,

Ait el Kadi

et al. 2023

Biodivers Conserv

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Argan tree is endemic of Moroccan arid regions, providing socioeconomic and cultural benefits since ancient times. This study identifies the emerging threats for the argan forest, and the opportunities related to the innovative uses of argan products and byproducts. Argan forest is facing pressure from overgrazing, demand for argan oil and nuts, and land degradation, despite its recognition as a UNESCO Biosphere Reserve and the inclusion in the FAO Globally Important Agricultural Heritage Systems (GIAHS) Programme. Innovative use and recycling of the waste deriving from argan nuts processing, offer promising opportunities to support a local bio-economy. Argan press cake can be used to integrate livestock feeding, to extract sudan dyes or to produce bioplastics. Argan nut shells can be used to produce environment-friendly and low-cost purifying materials and biochar, or as a source of bioenergy. Argan pulp can be used for bioethanol production or to obtain natural insect repellent. Despite these promising opportunities, the socio-economic impact of innovative uses is still limited. Local population is not sufficiently involved in management and development strategies. To support the sustainable development of local communities, it is necessary to promote a participative approach as well as training and product differentiation among argan women cooperatives.

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Removal of hexavalent chromium from aqueous solutions using Argania spinosa leaves

Cited by 2 publications

References 29 publications

Biosorption of Rare-Earth Elements From Aqueous Solutions Using Walnut Shell

Biosorption of Rare-Earth Elements From Aqueous Solutions Using Walnut Shell

Innovation of argan (Argania spinosa (L.) Skeels) products and byproducts for sustainable development of rural communities in Morocco. A systematic literature review

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