The influence of ZSM-5 structure on As(V) adsorption performance: pseudomorphic transformation and grafting of rare-earth Ce onto ZSM-5

Min, Xize; Zhou, Chundi; Han, Cuiping; Tang, Jie; Liu, Dekun; Luo, Yongming

doi:10.1007/s10853-020-04591-w

Cited by 16 publications

(3 citation statements)

References 51 publications

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“…The intra-particle diffusion isotherm was used to find the rate-controlling mechanism of As 3+ diffusion on HAp and Fe-HAp during the adsorption [5]. The linear expression of the intra-particle diffusion is given in Eq.…”

Section: Intra-particle Diffusionmentioning

confidence: 99%

“…The World Health Organization (WHO) recommended that the limit of arsenic in drinking water is ≤10 µg/L. However, more than 60 million peoples are said to be affected by arsenic contamination, which is exceeding WHO limits [1][2][3][4][5]. Consuming of Arsenic contaminated water causes carcinogenic effects in the skin, urinary bladder, liver, kidney, and lung [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Enriching Trace Level Adsorption Affinity of As3+ Ion Using Hydrothermally Synthesized Iron-Doped Hydroxyapatite Nanorods

Panchu

Sekar

Rajaram

et al. 2021

J Inorg Organomet Polym

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Contamination of arsenic in the form of arsenite (As 3+ ) and arsenate (As 5+ ) in potable water causes serious illness in the human body even at a very low concentration (10 µg / L). As 3+ is comparatively 60 times more toxic than As 5+ species. Hence, this work is focused on the preparation of adsorbents for efficient removal of As 3+ with higher adsorption affinity at trace level (≤50 µg/L). Here, iron-doped hydroxyapatite (Fe-HAp) synthesized by hydrothermal technique is employed as an efficient adsorbent. A very less quantity of Fe 2+ ion (0.5 wt %) is incorporated in the tetrahedral and octahedral sites of the HAp lattice along the c-axis which lead to drastic reduction in particle size (400%) and enhancing the specific surface area (105%), colloidal stability, and adsorption affinity. The maximum adsorption capacity of As 3+ is 139±2 µg/g and 183±2 µg/g for HAp and Fe-HAp, respectively. The adsorption rate of Fe-HAp is very rapid which is 538% higher compared to HAp and also the As 3+ adsorption affinity or sensitivity (0.71 µg/L) significantly improved 83-99% when compared to the adsorbents reported in the previous literature so far. The monolayer adsorption of As 3+ is purely strong chemisorption as confirmed by the Langmuir and Dubinin-Radushkevich (DKR) isotherm. The structure and morphology of HAp and Fe-HAp remain unchanged after the adsorption of As 3+ ions and also no secondary toxic products were observed. Hence, the above results reveal Fe-HAp as an efficient and low-cost adsorbent for removal of highly toxic As 3+ ions at the trace level.

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Section: Intra-particle Diffusionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enriching Trace Level Adsorption Affinity of As3+ Ion Using Hydrothermally Synthesized Iron-Doped Hydroxyapatite Nanorods

Panchu

Sekar

Rajaram

et al. 2021

J Inorg Organomet Polym

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“…Due to the various toxic effects of chromium, it is very crucial to remove it from wastewater using an efficient method that is low-cost along with a better % recovery. Previously, precipitation, electrolytic reduction, ion exchange, adsorption, and membrane separation techniques were utilized for decontamination of chromium from wastewater. − Among all other techniques, adsorption is convenient for the removal of chromium from wastewater because it is a simple setup, economical, and easy to operate. − Different adsorbent materials such as zeolite, clay, magnetic nanoparticles, and some natural cheaper adsorbents have been used, but they have low adsorption capacities and less selectivity. − Therefore, adsorbent materials with high capacity, selectivity, and reusability are known as desired adsorbent materials for adsorption. , …”

Section: Introductionmentioning

confidence: 99%

Equilibrium, Thermodynamic, and Density Functional Theory Modeling Studies for the Removal of Dichromate Ions from Wastewater Using Calix[4]arene Modified Silica Resin

et al. 2020

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Water is contaminated by different toxicants such as anions, cations, and organic waste products. In this regard, this study reveals the removal of Cr 2 O 7 ions from water using calix[4]arene modified silica (CMS) resin under the optimized conditions of concentration, pH, resin dosage, and effects of temperature. During the experiments, it was noticed that the adsorption of Cr 2 O 7 ions onto CMS resin is highly pH-dependent and has high adsorption capacity using only 25 mg of resin. The adsorption equilibrium data have been subjected to different isotherm models such as Langmuir, Freundlich, and Dubinin−Radushkevich (D-R). From the results, it has been observed that the Freundlich model is the best fit for an adsorption phenomenon as compared to the Langmuir model, while the D-R model demonstrates that the adsorption is an ion exchange type according to the values of E (kJ/mol). The thermodynamic study reveals that the values of ΔH, ΔG, and ΔS show that the adsorption process is endothermic and spontaneous. Dichromic acid (H 2 Cr 2 O 7 ) and its conjugated base (Cr 2 O 7 2− anion) were optimized at the B3LYP/LANL2DZ/6-311++G(d,p) level by using G09W software to analyze the adsorbate-adsorbent interaction mechanism. The efficiency and adsorption capacity of CMS resin have also been checked on real wastewater collected samples.

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Enhanced Cd2+ Adsorption Using Engineered Hydroxyapatite Nanoparticles

Panchu,

Venkatachalam

et al. 2024

J Inorg Organomet Polym

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The influence of ZSM-5 structure on As(V) adsorption performance: pseudomorphic transformation and grafting of rare-earth Ce onto ZSM-5

Cited by 16 publications

References 51 publications

Enriching Trace Level Adsorption Affinity of As3+ Ion Using Hydrothermally Synthesized Iron-Doped Hydroxyapatite Nanorods

Enriching Trace Level Adsorption Affinity of As3+ Ion Using Hydrothermally Synthesized Iron-Doped Hydroxyapatite Nanorods

Equilibrium, Thermodynamic, and Density Functional Theory Modeling Studies for the Removal of Dichromate Ions from Wastewater Using Calix[4]arene Modified Silica Resin

Enhanced Cd2+ Adsorption Using Engineered Hydroxyapatite Nanoparticles

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