Lead, zinc, nickel and chromium ions removal from polluted waters using zeolite formed from bauxite, obsidian and their combination with red mud: Behaviour and mechanisms

Belviso, Claudia; Lucini, Paola; Mancinelli, Maura; Abdolrahimi, Maryam; Martucci, Annalisa; Peddis, Davide; Maraschi, Federica; Cavalcante, Francesco; Sturini, Michela

doi:10.1016/j.jclepro.2023.137814

Cited by 20 publications

(5 citation statements)

References 63 publications

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“…This is due to the reason that thermal treatment at high temperature on zeolite and temperature used can enhance pore volume by removing water molecules and organics from pore channels [26,27]. Water contained in the zeolite cage and channel contributes 10 -25% to the total zeolite mass [28]. Therefore, the dehydration process of natural zeolite is important to allow efficient use of zeolites in water treatment.…”

Section: Adsorption Study 331 Batch Adsorption Of Pome Using Thermal-...mentioning

confidence: 99%

“…The same result was found in the previous studies. The reason may also be the complexity of the different components of the system, and in many cases the competition between the sorbates must be taken into account, which leads to a lack of equilibration in some models [28]. Moreover, the maximum capacity of adsorption is observed for all.…”

Section: Isotherm Studymentioning

confidence: 99%

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Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Norhafiza Ilyana Yatim,

Nur Aini Ishak,

Nurul Aqilah Mohamad

et al. 2023

ARFMTS

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Malaysia is known for its high oil palm production, which results in a significant amount of palm oil mill effluent (POME). Improper treatment or direct discharge of untreated POME can have significant impacts on water pollution. The objective of this study was to investigate the potential of zeolite as an adsorbent for the efficient treatment of POME. The initial physical and chemical properties of POME, sourced from the aerobic pond of a local palm oil mill in Terengganu, were determined before conducting two series of experiments using adsorption methods. In the first series of experiments, natural zeolite was used under different conditions, including treated zeolite thermally treated at 150°C for two hours and untreated natural zeolite. The results showed that heat-treated natural zeolite was more efficient in removing suspended solids, colour, and turbidity, with removal efficiencies and adsorption capacity of 66.2% (2.39 mg/g), 80.5% (21.50 mg/g), and 86.8% (0.77 mg/g), respectively. In the second series of experiments, the effects of various parameters affecting the adsorption process, such as adsorbent dosage and pH, were investigated. The optimum conditions for adsorbent dosage and pH were found to be 4 g/L and pH 4, respectively. The percent removal of all parameters reached over 70% with a peak time of 240 min. The adsorption isotherm was also studied, and it was found that the adsorption process was in good agreement with the Langmuir adsorption isotherm model. The study showed that adsorption treatment with natural zeolite was effective in removing turbidity, color, and TSS in POME wastewater. In addition, zeolite is a readily available and inexpensive adsorbent.

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Section: Adsorption Study 331 Batch Adsorption Of Pome Using Thermal-...mentioning

confidence: 99%

Section: Isotherm Studymentioning

confidence: 99%

Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Norhafiza Ilyana Yatim,

Nur Aini Ishak,

Nurul Aqilah Mohamad

et al. 2023

ARFMTS

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“…Li et al [29] showed that, after the addition of red mud, it can form a new phase that is favorable for the solidification of heavy metals, and reduce the leaching of a variety of heavy metals in fly ash. In addition, red mud can also adsorb a variety of other heavy metal ions [30][31][32]. The coupling of red mud and phosphorus mud [33] can be utilized to absorb NO x and avoid secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of BiOX-Red Mud/Granulated Blast Furnace Slag Geopolymer Microspheres for Photocatalytic Degradation of Formaldehyde

Lu,

Zhang,

Wang

et al. 2024

Materials

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Release of formaldehyde gas indoors is a serious threat to human health. The traditional adsorption method is not stable enough for formaldehyde removal. Photocatalytic degradation of formaldehyde is effective and rapid, but photocatalysts are generally expensive and not easy to recycle. In this paper, geopolymer microspheres were applied as matrix materials for photocatalysts loading to degrade formaldehyde. Geopolymer microspheres were prepared from red mud and granulated blast furnace slag as raw materials by alkali activation. When the red mud doping was 50%, the concentration of NaOH solution was 6 mol/L, and the additive amount was 30 mL, the prepared geopolymer microspheres possessed good morphological characteristics and a large specific surface area of 38.80 m2/g. With the loading of BiOX (X = Cl, Br, I) photocatalysts on the surface of geopolymer microspheres, 85.71% of formaldehyde gas were adsorbed within 60 min. The formaldehyde degradation rate of the geopolymer microspheres loaded with BiOI reached 87.46% within 180 min, which was 23.07% higher than that of the microspheres loaded with BiOBr, and 50.50% higher than that of the microspheres loaded with BiOCl. While ensuring the efficient degradation of formaldehyde, the BiOX (X = Cl, Br, I)-loaded geopolymer microspheres are easy to recycle and can save space. This work not only promotes the resource utilization of red mud and granulated blast furnace slag, but also provides a new idea on the formation of catalysts in the process of photocatalytic degradation of formaldehyde.

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“…The use of obsidian is driven by the easy availability of amorphous silica in a natural, widespread, and economical source. Literature data have documented its combination with other phases to form a new raw material available for the synthesis of zeolites [55,56].…”

Section: Introductionmentioning

confidence: 99%

Determining the Role of Water Molecules in Sodalite Formation Using the Vapor Phase Crystallization Method

Belviso

2024

Processes

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The efficiency of the vapor phase crystallization (VPC) process in zeolite formation using mixtures of a natural source (obsidian) and common waste materials (red mud and fly ash) was analyzed. The aim was to demonstrate that water molecules available during this treatment control mainly the synthesis of sodalite, regardless of the raw material used, as long as it is rich in amorphous silica and alumina pre-fused with NaOH. The data indicate that increasing the temperature to generate steam from distilled water during the VPC process results in the continuous transformation of amorphous material into sodalite and, subordinately, cancrinite. The formation of the newly formed phases was monitored by powder XRD and SEM.

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Lead, zinc, nickel and chromium ions removal from polluted waters using zeolite formed from bauxite, obsidian and their combination with red mud: Behaviour and mechanisms

Cited by 20 publications

References 63 publications

Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Heat-Treated Zeolite as Effective Adsorbent for Final Treatment of Palm Oil Mill Effluent

Synthesis of BiOX-Red Mud/Granulated Blast Furnace Slag Geopolymer Microspheres for Photocatalytic Degradation of Formaldehyde

Determining the Role of Water Molecules in Sodalite Formation Using the Vapor Phase Crystallization Method

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