Immobilized nickel hexacyanoferrate on activated carbons for efficient attenuation of radio toxic Cs(I) from aqueous solutions

Lalhmunsiama,; Lalhriatpuia, C.; Tiwari, Diwakar; Lee, Seung Mok

doi:10.1016/j.apsusc.2014.09.200

Cited by 50 publications

(8 citation statements)

References 46 publications

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“…The porosity of sodium alginate beads allows the solutes to diffuse into the beads and come in contact with the entrapped nanoparticles. In addition, alginate is nontoxic, biodegradable, non-immunogenic, and produces thermally irreversi ble and water insoluble gels (Lalhmunsiama et al 2014;Yang et al 2015;Karthik and Meenakshi 2015;Gopalakannana and Viswanathan 2015).…”

Section: Introductionmentioning

confidence: 99%

A comparative study with biologically and chemically synthesized nZVI: applications in Cr (VI) removal and ecotoxicity assessment using indigenous microorganisms from chromium-contaminated site

Ravikumar

Kumar

Rajeshwari

et al. 2015

Environ Sci Pollut Res

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In the present communication, we report a comparative study of Cr (VI) removal using biologically synthesized nano zero valent iron (BS-nZVI) and chemically synthesized nZVI (CS-nZVI), both immobilized in calcium alginate beads. The parameters like initial Cr (VI) concentration, nZVI concentration, and the contact time for Cr (VI) removal were optimized based on Box-Behnken design (BBD) by response surface modeling at a constant pH 7. Under the optimized conditions (concentration of nZVI = 1000 mg L(-1), contact time = ∼ 80 min, and initial concentration of Cr (VI) = 10 mg L(-1)), the Cr (VI) removal by the immobilized BS-nZVI and CS-nZVI alginate beads was 80.04 and 81.08 %, respectively. The adsorption of Cr (VI) onto the surface of alginate beads was confirmed by scanning electron microscopy with energy-dispersive x-ray spectroscopy (SEM-EDX), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) analysis. The applicability of the process using both the sorbents was successfully test medium Cr (VI) spiked environmental water samples. In order to assess the ecotoxic effects of nZVI, the decline in cell viability, generation of intracellular reactive oxygen species (ROS), cell membrane damage, and biouptake was studied at 1000 mg L(-1) concentration, with five indigenous bacterial isolates from chromium-contaminated lake sediments and their consortium.

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Section: Introductionmentioning

confidence: 99%

A comparative study with biologically and chemically synthesized nZVI: applications in Cr (VI) removal and ecotoxicity assessment using indigenous microorganisms from chromium-contaminated site

Ravikumar

Kumar

Rajeshwari

et al. 2015

Environ Sci Pollut Res

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“…The influence of PB adsorption prior to Cs adsorption and the influence of pH on the amount of adsorbed Cs were also determined. [48,16]. Some manuscripts report extremely low [39,49] removal percentages for Cs using AC.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

Adsorption of cesium on different types of activated carbon

Vanderheyden

Ammel

Katarzyna

et al. 2016

J Radioanal Nucl Chem

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The optimal conditions to remove radiocesium from water by adsorption on activated carbon (AC) were investigated. Two commercial ACs were compared to ACs prepared by steam activation of brewers' spent grain. The influence of pH and loading AC with Prussian Blue were studied. 134 Cs, measured by gamma-ray spectroscopy, served as a tracer for the Cs concentration. Column experiments showed that a neutral to acidic pH enhanced adsorption compared to high pH. Norit GAC 1240 had the highest adsorption capacity, 8.5 µg Cs g-1 AC for a column filtration. Sequential columns of Norit GAC 1240 removed 28.1 ± 2.8 % of Cs per column.

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“…Until the 1970s, most investigations on polymeric hexacyanometallates focused on their structure and electronic features From the eighties to date, PBA have been treated as functional materials. Their applications cover a wide diversity of fields, such as magnetism, catalysis and electrocatalysis, gas storage and separation, batteries, and environmental remediation, etc. However, it is not possible to divorce both topics since functionality directly depends on the material's electronic and crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Recrystallization as a Strategy to Reveal the Structural Diversity in Hexacyanometallates: Nickel and Copper Hexacyanoosmates(II)

et al. 2020

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The results discussed herein reinforce the relevance of the hydrothermal recrystallization in transition metal hexacyanometallates as a suitable strategy to access the structural diversity of this family of coordination polymers. Copper(2+) and nickel(2+) hexacyanoosmates(II) were prepared by the precipitation method using hexacyanoosmic(II) acid as the complex anion source, obtaining powders of insufficient crystalline quality for the structural study. These powders were then recrystallized under hydrothermal conditions. For Ni, three new phases where formed, monoclinic and tetragonal, and a hexagonal modification when the monoclinic one is dehydrated under soft heating. For copper, one new tetragonal phase was [a] Prof. 1763found, in addition to the previously reported cubic one, typical of Prussian blue analogues. The crystal structure for these four nickel and cooper hexacyanoosmates(II) were solved and refined ab initio from powder XRD data. The refined crystal structures are properly supported by a detailed spectroscopic study from IR and UV/Vis data, Ligand Field Analysis, and thermal, magnetic and hydrogen adsorption measurements. In the anhydrous phase for nickel, neighboring Ni atoms were found coordinated by bifurcated N end, an atypical coordination mode for the CNligand. The results herein discussed contribute to shed light on the vast information unrevealed on the coordination chemistry of transition metal hexacyanometallates. catalysis, [6] gas storage and separation, [7] batteries, [8] and environmental remediation, [9] etc. However, it is not possible to divorce both topics since functionality directly depends on the material's electronic and crystalline structure.The most studied polymeric hexacyanometallates are those where the internal metal center (M, linked to the C end of the CNgroup) belongs to the first transition series. This obeys to the greater availability of the building blocks, to historical reasons, but also to the fact that they are obtained with good crystallinity by the very easy precipitation method. The hexacyanide anions containing metals with relatively diffuse d orbitals -corresponding to the second and third transition series -have proved to improve the robustness of the polymeric frameworks. [10] However, when these compounds are prepared by the traditional precipitation method, they frequently exhibit relatively low crystallinity. [11] This is a critical issue for the structures containing a great number of vacancies of the hexacyanide building block around the outer metal (T, linked to the N end of the CNgroup), which requires recrystallization procedures after precipitation of the crude compound. [10] In this work, we explore the potentialities of solvothermal recrystallization, beyond improving the crystallinity of materials, with the aim of generating structural diversity.In general, structural diversity for each combination of inner and outer metals, is not frequently observed in polymeric hexacyanometallates. A unique behavior in this sense appears for Co 2+ a...

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Immobilized nickel hexacyanoferrate on activated carbons for efficient attenuation of radio toxic Cs(I) from aqueous solutions

Cited by 50 publications

References 46 publications

A comparative study with biologically and chemically synthesized nZVI: applications in Cr (VI) removal and ecotoxicity assessment using indigenous microorganisms from chromium-contaminated site

A comparative study with biologically and chemically synthesized nZVI: applications in Cr (VI) removal and ecotoxicity assessment using indigenous microorganisms from chromium-contaminated site

Adsorption of cesium on different types of activated carbon

Hydrothermal Recrystallization as a Strategy to Reveal the Structural Diversity in Hexacyanometallates: Nickel and Copper Hexacyanoosmates(II)

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