Arsenic (III) removal from water by hydroxyapatite‐bentonite clay‐nanocrystalline cellulose

Hokkanen, Sanna; Doshi, Bhairavi; Srivastava, Varsha; Puro, Liisa; Koivula, Risto

doi:10.1002/ep.13147

Cited by 33 publications

(12 citation statements)

References 47 publications

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“…In Figure f, we provide a comparative collection of the present BHA adsorbent versus other pertinent As(III) adsorbents presented in the literature. It is clear in Figure f that the BHA is superior to many of the previously reported adsorbents, such as metal–organic frameworks (MOFs), − polymer-miner composites (PMCs), , modified natural polymers (MNPs), − and carbon-based materials (CBMs) − for As(III) sorption.…”

Section: Resultsmentioning

confidence: 92%

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Biohybrid Hydrogel and Aerogel from Self-Assembled Nanocellulose and Nanochitin as a High-Efficiency Adsorbent for Water Purification

Zhang¹,

Elsayed²,

Navarathna³

et al. 2019

ACS Appl. Mater. Interfaces

126

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A simple and novel method, self-assembly of nanocellulose and nanochitin, was developed to produce high-efficiency and versatile biohybrid hydrogel (BHH) and aerogel (BHA) for water purification. The self-assembly process was driven by the electrostatic force between one-dimensional (1D) negatively charged TEMPOoxidized cellulose nanofiber (TOCNF) and positively charged partly deacetylated chitin nanofiber (PDChNF). The self-assembly process was performed at room temperature and without adding any crosslinking agents throughout the process. This results in the threedimensional (3D) BHH that physically cross-linked via both electrostatic interactions and hydrogen bonding between TOCNF and PDChNF. The obtained BHA from lyophilized BHH exhibited a highly porous interconnected structure with a specific surface area of 54 m 2 •g −1 , which assures the availability of its internal active site for the adsorption of toxic metalloid ions and organic pollutants. Consequently, the BHA displayed super-high adsorption capacities of 217 mg•g −1 for As(III) under the neutral pH conditions and 531 mg•g −1 for methylene blue (MB) under an alkaline aqueous condition with rapid adsorption kinetics, in sharp contrast to conventional biobased adsorbents. Moreover, the BHA is reusable, which still exhibited a high MB adsorption capacity of 505 mg•g −1 even after five successive adsorption−desorption cycles. This versatile BHA produced via a facile preparation strategy is proven to be a promising renewable adsorbent for water purification, offering simple and green alternatives to the conventional adsorbent from synthetic polymers.

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Section: Resultsmentioning

confidence: 92%

“…269.33 R 2 0.99 second-order kinetic k 2 (g•mg −1 •h −1 ) 0.0019 0.1192 q exp (mg•g −1 ) 293 49.33 q cal (mg organic frameworks (MOFs), 43−45 polymer-miner composites (PMCs), 46,47 modified natural polymers (MNPs), 48−51 and carbon-based materials (CBMs) 52−54 for As(III) sorption. 2.3.3.…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Biohybrid Hydrogel and Aerogel from Self-Assembled Nanocellulose and Nanochitin as a High-Efficiency Adsorbent for Water Purification

Zhang¹,

Elsayed²,

Navarathna³

et al. 2019

ACS Appl. Mater. Interfaces

126

View full text Add to dashboard Cite

show abstract

“…Nano-adsorbents have small size, higher surface area, easy separation, high reactivity and abundance of active sites for the removal of contaminants [22,23].…”

Section: Introductionmentioning

confidence: 99%

Kinetic and equilibrium study of trinitrophenol adsorption onto polyaniline tea waste nanocomposite from aqueous medium

Meena

Saini

Surela

et al. 2022

Holist. approach environ.

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The current study is focused on the synthesis of polyaniline-tea waste nanocomposite (PANI-TWC) material as a competent adsorbent for the effective removal of trinitrophenol (TNP) from aqueous medium. Batch experiments were performed to examine the influence of the various adsorption parameters such as pH, dose of adsorbents, contact time and initial concentration of TNP on the adsorption process. The kinetic data were fitted with pseudo-first and pseudo-second-order models, and the kinetic studies were well explained by the pseudo-second-order kinetic model. Moreover, the adsorption isotherm study for TNP adsorption from aqueous solutions on the PANI-TWC was performed by Langmuir and Freundlich isotherm models. The adsorption equilibrium data were best fitted to the Langmuir isotherm, which indicated that the adsorption surfaces are homogeneous and the adsorption occurred in monolayers.

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“…The disadvantage of using HA in treatment processes is its low reusability due to its low mechanical strength. Various materials such as clay, chitosan, and carbon nanotubes are added to its structure to increase its mechanical strength [8][9][10]. Clay minerals are preferred due to their low cost, nontoxicity, and high adsorption capacity [11,12].…”

Section: Introductionmentioning

confidence: 99%

Synthesize of montmorillonite supported hydroxyapatite and determination of adsorption capacity by tetracycline removal

Demirçivi

2022

MANAS Journal of Engineering

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In this study, removal of organic pollutants in wastewater using HA/MMT composite material was studied. Tetracycline (TC) antibiotic was used as an organic pollutant. HA/MMT composites were synthesized in a ball mill at different ratios (1:1, 1:2 and 2:1). The synthesis time was fixed at 5 hours. As a result of the experiments, it was concluded that 1:2 ratio of HA/MMT composite has the highest adsorption capacity (147 mg g-1) among the others. The isotherm experiments showed that the Langmuir isotherm model was compatible with the experimental data, and the maximum adsorption capacity was obtained as 150 mg g-1. In the light of kinetic data, pseudo-first-order, pseudo-second-order kinetic models and intra-particle diffusion models were examined and it was found that the pseudo-second-order kinetic model was the best suitable model for TC adsorption. In addition, it has been observed that intra-particle diffusion takes place as a rate-determining step. It has been concluded that TC adsorption of HA/MMT composite was an endothermic and spontaneous process thermodynamically. It has been concluded that the synthesized HA/MMT composite has high adsorption capacity and can be used for the removal of organic pollutants such as TC from wastewater.

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Arsenic (III) removal from water by hydroxyapatite‐bentonite clay‐nanocrystalline cellulose

Cited by 33 publications

References 47 publications

Biohybrid Hydrogel and Aerogel from Self-Assembled Nanocellulose and Nanochitin as a High-Efficiency Adsorbent for Water Purification

Biohybrid Hydrogel and Aerogel from Self-Assembled Nanocellulose and Nanochitin as a High-Efficiency Adsorbent for Water Purification

Kinetic and equilibrium study of trinitrophenol adsorption onto polyaniline tea waste nanocomposite from aqueous medium

Synthesize of montmorillonite supported hydroxyapatite and determination of adsorption capacity by tetracycline removal

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