Life cycle assessment on alginate-based nanocomposite beads for the removal of lead(II) from aqueous solutions

Chiew, Christine Shu Ching; Gourich, Wail; Pasbakhsh, Pooria; Poh, Phaik Eong; Tey, Beng Ti; Song, Cher Pin; Chan, Eng Seng

doi:10.1016/j.jwpe.2021.102531

Cited by 16 publications

(2 citation statements)

References 64 publications

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“…Regeneration of the adsorbent and its following uses are important issues for the economy of the treatment process. Also, it was claimed that loaded bead regeneration decreases the environmental impact of beads' life cycle by around 72% for alginate-based nanocomposite beads [36]. For this purpose, acids are utilized at two different concentrations which are HNO 3 and H 2 SO 4 at 0.2 and 1 M concentrations.…”

Section: Regeneration and Reuse Potential Of A-nano Zno Beadsmentioning

confidence: 99%

Zinc oxide nanoparticles encapsulated in alginate beads: a promising and recyclable adsorbent for simultaneous uptake of toxic metals

Çevik,

Kivilcimdan Moral

2024

Nanotechnology

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Heavy metal toxicity is a known problem and various methods are used for treatment. Adsorption has some advantages and it would be promising if environmentally friendly and cheap materials were utilized. Alginate and zinc oxide nanoparticles were selected and composite alginate beads were used for the removal of mixed metals from aqueous solutions. Batch and column experiments were conducted to determine some parameters' effects and the adsorbent's real application potential. According to the batch experiments, zinc oxide nanoparticles to alginate ratio of 0.5 g/g, and pH levels nearby to the neutral range led to better metal removals. 0.5 ml/min of flow rate supplied better metal removal efficiencies in columns, with the highest treatment as 86% of Pb2+. Acid treatment can be successfully applied for the regeneration of the adsorbent, at least three times only with a 4% reduction in the adsorption efficiency. Heavy metal uptake was compatible with the Pseudo 2nd order model indicating chemisorption as a dominant mechanism. Also, the intraparticle diffusion model illustrated adsorption might govern more than one step. The Langmuir model had the best fit and suggested monolayer covering for Pb2+, 76.3 mg/g. Alginate-based nanocomposite beads were useful for mixed metal removal and could be used.

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Section: Regeneration and Reuse Potential Of A-nano Zno Beadsmentioning

confidence: 99%

Zinc oxide nanoparticles encapsulated in alginate beads: a promising and recyclable adsorbent for simultaneous uptake of toxic metals

Çevik,

Kivilcimdan Moral

2024

Nanotechnology

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“…Alginate and HNT-based hydrogels have already been reported in the literature, as they represent a class of materials which can be used in the most diverse applications. For instance, they have been exploited for the removal of dyes and metals from water in the environmental field, for the delivery of drugs and anticancer compounds in biomedical technology, for the release of fertilizers in agriculture, and as scaffolds in tissue engineering [ 38 , 39 , 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Printable Hydrogels Based on Alginate and Halloysite Nanotubes

Cavallaro

Lisuzzo

Lazzara

et al. 2022

IJMS

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The design of hydrogels for the controlled release of active species is an attractive challenge. In this work, we prepared hybrid hydrogels composed of halloysite nanotubes as the inorganic component, and alginate as the organic counterpart. The reported procedure allowed us to provide the resulting materials with a peculiar wire-like shape. Both optical and scanning electron microscopy were used to characterize the morphological properties of the hydrogel wires, whose diameters were ca. 0.19 and 0.47 mm, respectively. The possibility to be exploited as drug delivery systems was carried out by loading the nanoclay with salicylic acid and by studying the release profiles. Thermogravimetric experiments showed that the amount of encapsulated drug was 4.35 wt%, and the salicylic acid was thermally stabilized after the loading into the nanotubes, as observed by the shift of the degradation peak in the differential thermograms from 193 to 267 °C. The kinetics investigation was conducted using UV–Vis spectrophotometry, and it exhibited the profound effects of both the morphology and dimensions on the release of the drugs. In particular, the release of 50% of the payload occurred in 6 and 10 h for the filiform hydrogels, and it was slower compared to the bare drug-loaded halloysite, which occurred in 2 h. Finally, an induction period of 2 h was observed in the release profile from the thicker sample.

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How Environmental Chemicals of Concern Emerge: ILs and HNTs

Nelson

2023

Challenges and Advances in Computational Chemistry and Physics

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Life cycle assessment on alginate-based nanocomposite beads for the removal of lead(II) from aqueous solutions

Cited by 16 publications

References 64 publications

Zinc oxide nanoparticles encapsulated in alginate beads: a promising and recyclable adsorbent for simultaneous uptake of toxic metals

Zinc oxide nanoparticles encapsulated in alginate beads: a promising and recyclable adsorbent for simultaneous uptake of toxic metals

Printable Hydrogels Based on Alginate and Halloysite Nanotubes

How Environmental Chemicals of Concern Emerge: ILs and HNTs

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