Cactus material-based adsorbents for the removal of heavy metals and dyes: a review

Amari, Abdelfattah; Alalwan, Basem; Eldirderi, Moutaz Mustafa A.; Mnif, Wissem; Rebah, Faouzi Ben

doi:10.1088/2053-1591/ab5f32

Cited by 25 publications

(16 citation statements)

References 86 publications

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“…Being a plant practically present around the world, cactus, and due to their chemical composition and biological and nutritional properties, find various applications, being one of them, their use as adsorbents for toxic metals and organic dyes [4]. Thus, different cactus parts: fruit seeds, peel, clodades, among others, had been investigated in the topic of the removal of organic dyes from waters.…”

Section: Adsorbents and Organic Dyes: The Adsorption Resultsmentioning

confidence: 99%

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

López¹

2021

Promising Techniques for Wastewater Treatment and Water Quality Assessment

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The problem of the treatment of contaminated wastewaters is of the upmost worldwide interest. This contamination occurs via the presence of inorganic or organic contaminants of different nature in relation with the industry they come from. In the case of organic dyes, their environmental impact, and thus, their toxicity come from the air (releasing of dust and particulate matter), solid (scrap of textile fabrics, sludges), though the great pollution, caused from dyes, comes from the discharge of untreated effluents into waters, contributing to increase the level of BOD and COD in these liquid streams; this discharge is normally accompanied by water coloration, which low the water quality, and caused a secondary issue in the wastewater treatment. Among separation technologies, adsorption processing is one of the most popular, due to its versatility, easiness of work, and possibility of scaling-up in the eve of the treatment of large wastewater volumes. Within a miriade of potential adsorbents for the removal of organic dyes, this work presented the most recent advances in the topic.

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Section: Adsorbents and Organic Dyes: The Adsorption Resultsmentioning

confidence: 99%

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

López¹

2021

Promising Techniques for Wastewater Treatment and Water Quality Assessment

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“…For example, biological natural materials such as cactus, moringa, Aloe vera, bean, etc. have been explored for their eventual use for pollutants removal [16][17][18]. Interestingly, the removal of various pollutants (dyes, turbidity, metals, etc.)…”

Section: Introductionmentioning

confidence: 99%

Aloe vera as Promising Material for Water Treatment: A Review

et al. 2021

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Aloe vera plant offers a sustainable solution for the removal of various pollutants from water. Due to its chemical composition, Aloe vera has been explored as coagulant/flocculant and biosorbent for water treatment. Most of the used materials displayed significant pollutants removals depending on the used preparation methods. AV-based materials have been investigated and successfully used as coagulant/flocculant for water treatment at laboratory scale. Selected AV-based materials could reduce the solids (total suspended solids (TSS), suspended solids (SS), total dissolved solids (TDS), and dissolved solids (DS)), turbidity, chemical oxygen demand (COD), biochemical oxygen demand (BOD), heavy metals, and color, with removal percentages varied depending on the coagulant/flocculant materials and on the wastewater characteristics. In the same context, AV materials can be used as biological flocculant for wastewater sludge treatment, allowing good solid–liquid separation and promoting sludge settling. Moreover, using different methods, AV material-based biosorbents were prepared and successfully used for pollutants (heavy metal dyes and phenol) elimination from water. Related results showed significant pollutant removal efficiency associated with an interesting adsorption capacity comparable to other biosorbents derived from natural products. Interestingly, the enzymatic system of Aloe vera (carboxypeptidase, glutathione peroxidase, and superoxide dismutase) has been exploited to degrade textile dyes. The obtained results showed high promise for removal efficiencies of various kinds of pollutants. However, results varied depending on the methodology used to prepare the Aloe vera based materials. Because of its valuable properties (composition, abundance, ecofriendly and biodegradable), Aloe vera may be useful for water treatment.

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“…Due to the frequent coexistence of dyes and heavy metals in industrial wastewater, adsorbents that enable the removal of both types of pollutants are being sought. A review of the literature shows that these are very diverse materials, including chelating resins [21], low-cost waste-plant materials [22][23][24], nano-activated carbon [16], graphene oxide [2], nanocellulose/functionalized nanocellulose [25], clays and diatomaceous earth [26], fly ash [27], and zeolites [28]. Another group of highly effective dye-removing and heavymetal-removing [29][30][31] adsorbents [32][33][34] includes hydroxyapatites of natural and synthetic origin.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Physical, Chemical, and Adsorption Properties of Coal-Fly-Ash–Hydroxyapatite Composites

et al. 2021

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(1) Hydroxyapatite (Hap), which can be obtained by several methods, is known to be a good adsorbent. Coal fly ash (CFA) is a commonly reused byproduct also used in environmental applications as an adsorbent. We sought to answer the following question: Can CFA be included in the method of Hap wet synthesis to produce a composite capable of adsorbing both heavy metals and dyes? (2) High calcium lignite CFA from the thermal power plant in Bełchatów (Poland) was used as the base to prepare CFA–Hap composites. Four types designated CFA–Hap1–4 were synthesized via the wet method of in situ precipitation. The synthesis conditions differed in terms of the calcium reactants used, pH, and temperature. We also investigated the equilibrium adsorption of Cu(II) and rhodamine B (RB) on CFA–Hap1–4. The data were fitted using the Langmuir, Freundlich, and Redlich–Peterson models and validated using R2 and χ2/DoF. Surface changes in CFA–Hap2 following Cu(II) and RB adsorption were assessed using SEM, SE, and FT-IR analysis. (3) The obtained composites contained hydroxyapatite (Ca/P 1.67) and aluminosilicates. The mode of Cu(II) and RB adsorption could be explained by the Redlich–Peterson model. The CFA–Hap2 obtained using CFA, Ca(NO3)2, and (NH4)2HPO4 at RT and pH 11 exhibited the highest maximal adsorption capacity: 73.6 mg Cu/g and 87.0 mg RB/g. (4) The clear advantage of chemisorption over physisorption was indicated by the Cu(II)–CFA–Hap system. The RB molecules present in the form of uncharged lactone were favorably adsorbed even on strongly deprotonated CFA–Hap surfaces.

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Cactus material-based adsorbents for the removal of heavy metals and dyes: a review

Cited by 25 publications

References 86 publications

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

Aloe vera as Promising Material for Water Treatment: A Review

Characterization of the Physical, Chemical, and Adsorption Properties of Coal-Fly-Ash–Hydroxyapatite Composites

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