Simultaneous removal of chromium(VI) and Reactive Black 5 using zeolite supported nano-scale zero-valent iron composite

Kim, Seol Ah; Kamala‐Kannan, Seralathan; Oh, Sae-Gang; Cho, Min; Bae, Sunyoung; Oh, Byung‐Taek

doi:10.1007/s12665-015-4855-z

Cited by 24 publications

(9 citation statements)

References 36 publications

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“…In generally, the removal efficiency of MNZ and heavy metals (Cu and Zn) firstly increased and then decreased with the increase of catalyst dosage in the above-mentioned two mixed systems. The results were consistent with previous studies reporting the simultaneous removal of hexavalent chromium and dye using zero-valent iron or zero-valent iron composite [21,22]. This was attributed to the available actives sites [22,23].…”

Section: Effect Of Catalyst Dosagesupporting

confidence: 92%

“…The results were consistent with previous studies reporting the simultaneous removal of hexavalent chromium and dye using zero-valent iron or zero-valent iron composite [21,22]. This was attributed to the available actives sites [22,23]. The active sites and surface areas increased as the increase in catalyst dosage to improve the reaction rate.…”

Section: Effect Of Catalyst Dosagesupporting

confidence: 92%

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Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Sun

Zhu

et al. 2019

Environmental Technology

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Simultaneous removal of the antibiotics and heavy metals has attracted increasing attention since these contaminants are frequently detected in the aquatic environment. In this study, highly active nano-Mg(OH) 2 was synthesized and firstly applied in catalytic ozonation system for simultaneous removal of metronidazole (MNZ) and heavy metal ions (Cu 2+ and Zn 2+ ). The results showed that the synthesized Mg(OH) 2 nanoparticles exhibited high efficiencies of removing both MNZ and heavy metal ions (Cu 2+ and Zn 2+ ) in the catalytic ozonation process. Surprisingly, the removal efficiency of MNZ in the catalytic ozonation system with nano-Mg(OH) 2 catalyst was improved in the presence of Cu 2+ and Zn 2+ . Some parameters such as catalyst dosage, initial concentration of MNZ, initial concentration of heavy metal and reaction temperature could affect the simultaneous removal of MNZ and heavy metal ions (Cu 2+ and Zn 2+ ). This study provides an innovative and effective method for the simultaneous removal of antibiotics and heavy metals from the aquatic environment.

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Section: Effect Of Catalyst Dosagesupporting

confidence: 92%

Section: Effect Of Catalyst Dosagesupporting

confidence: 92%

Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Sun

Zhu

et al. 2019

Environmental Technology

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“…) are adsorbed best on diatomite surface [Kim, S et al, 2016]. The alkali medium is not favorable for removing chromium (VI) and, moreover at pH higher than 8, there was a slight coloring of tested sample to brown color.…”

Section: O Crmentioning

confidence: 94%

“…Sorption is one of the methods applied for removing chromium from water and effluents [Kim, S et al, 2016, Wazwaz A. et al, 2019., Yu, X et al, 2014.]. In a specific system (either through-flow or no flow type) this process lasts till the moment of establishing dynamic equilibrium of concentration of the adsorbate remaining in solution and on the internal surface of the adsorbent (equilibrium concentration).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Chromium (VI) on Raw and Modified Carpathian Diatomite

Puszkarewicz¹,

Kaleta²

2019

J. Ecol. Eng.

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The paper presents the research on the usability of natural Carpathian diatomite for removing chromate ions from water solutions. The concentration of chromium (VI) in test water was C 0 = 1 g/m 3. Both raw diatomite and the diatomite modified with iron compounds of granulation 0.5-1.0 mm were tested. The process kinetics, as well as the effect of water reaction and the diatomite type on chromium sorption were determined under static conditions (no through flow). For both diatomite types, the chromium adsorption proceeded most effectively at pH 4. The effect of diatomite modification with iron compounds on the effectiveness of chromium (VI) adsorption was determined on the basis of Freundlich adsorption isotherm. Compared to raw diatomite, the modified adsorbent (diatomite-Fe) exhibited great sorption capacity for chromate ions from water. When applied under dynamic conditions (v = 4 m/h), as filtration bed, it removed chromium compounds from water very effectively. It makes diatomite-Fe material a promising candidate for application in water treatment systems. The chromium concentration in the effluent oscillated within C k = 0.001-0.002 mg/dm 3 , and the adsorption capacity of the bed, determined in the bed breakthrough point, reached P p = 316.8 mg/kg.

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“…Nevertheless, the presence of Pb 2+ observably decreased the Langmuir adsorption capacity of Cd 2+ to 3.31 mg g −1 (figure 15b), which indicates the competition for active sites between them. The compound Pb-hydroxide on the surface of UVS-NZVI inhibited the formation of Cd-Fehydroxide in mixed solution and the surface cation exchange sites were completely occupied by Pbhydroxide precipitation and Pb [57][58][59]. Hence, there was almost no Cd 2+ adsorbed on the UVS-NZVI composite.…”

Section: Adsorption Thermodynamic Analysismentioning

confidence: 99%

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

Wang

Luo

et al. 2020

R. Soc. open sci.

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Nanoscale zero-valent iron (NZVI) has a high adsorption capacity for heavy metals, but easily forms aggregates. Herein, preprocessed undulating venus shell (UVS) is used as support material to prevent NZVI from reuniting. The SEM and TEM results show that UVS had a porous layered structure and NZVI particles were evenly distributed on the UVS surface. A large number of adsorption sites on the surface of UVS-NZVI are confirmed by IR and XRD. UVS-NZVI is used for adsorption of Pb 2+ and Cd 2+ at pH = 6.00 in aqueous solution, and the experimental adsorption capacities are 29.91 and 38.99 mg g −1 at optimal pH, respectively. Thermodynamic studies indicate that the adsorption of ions by UVS-NZVI is more in line with the Langmuir model when Pb 2+ or Cd 2+ existed alone. For the mixed solution of Pb 2+ and Cd 2+ , only the adsorption of Pb 2+ by UVS-NZVI conforms to the Langmuir model. In addition, the maximum adsorption capacities of UVS-NZVI for Pb 2+ and Cd 2+ are 93.01 and 46.07 mg g −1 , respectively. Kinetic studies demonstrate that the determination coefficients ( R 2 ) of the pseudo first-order kinetic model for UVS-NZVI adsorption of Cd 2+ and Pb 2+ are higher than those of the pseudo second-order kinetic model and Elovich kinetic model. Highly efficient performance for metal removal makes UVS-NZVI show potential application to heavy metal ion adsorption.

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Simultaneous removal of chromium(VI) and Reactive Black 5 using zeolite supported nano-scale zero-valent iron composite

Cited by 24 publications

References 36 publications

Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Adsorption of Chromium (VI) on Raw and Modified Carpathian Diatomite

Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water

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Simultaneous removal of chromium(VI) and Reactive Black 5 using zeolite supported nano-scale zero-valent iron composite

Cited by 24 publications

References 36 publications

Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Simultaneous catalytic ozonation degradation of metronidazole and removal of heavy metal from aqueous solution using nano-magnesium hydroxide

Adsorption of Chromium (VI) on Raw and Modified Carpathian Diatomite

Shell biomass material supported nano-zero valent iron to remove Pb 2+ and Cd 2+ in water

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Product

Resources

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Shell biomass material supported nano-zero valent iron to remove Pb ²⁺ and Cd ²⁺ in water