New insights into the capture performance and mechanism of hazardous metals Cr3+ and Cd2+ onto an effective layered double hydroxide based material

Zhu, Sidi; Khan, Muhammad Asim; Kameda, Tomohito; Xu, Haihua; Wang, Tianyi; Xia, Mingzhu; Yoshioka, Toshiaki

doi:10.1016/j.jhazmat.2021.128062

Cited by 184 publications

(46 citation statements)

References 81 publications

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“…Heavy metals such as copper should be eliminated from industrial wastewater before reaching the natural environment, and this can be accomplished through various treatment techniques including chemical precipitation [4], a flotation process [5,6], ion exchange [7,8], electrochemical treatment [9,10], adsorption [11][12][13][14][15] and membrane filtration [16][17][18][19][20][21][22][23]. Each of these methods has disadvantages and some limitations.…”

Section: Introductionmentioning

confidence: 99%

A Study of Copper (II) Ions Removal by Reverse Osmosis under Various Operating Conditions

et al. 2022

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The study aims to treat artificial wastewater contaminated with copper (II) ions by reverse osmosis using (SEPA CF042 Membrane Test Skid-TFC BW30XFR). Several concentrations of feedstock were prepared. Different operating pressure, temperature, and flow rate were applied. The effect of these operating conditions on both the amount of Cu (II) removal and the permeate flux was monitored. The results of the study revealed that both the permeate flux and Cu (II) removal amount were directly proportional to the operating pressure and feed temperature but inversely proportional to the feed concentration. In contrast, the feed flow rate showed a negligible effect on the permeate flux and Cu (II) removal amount. The temperature correction factor (TCF) of the membrane was calculated and was found to be directly proportional to the feed temperature but inversely proportional to the applied pressure. It was seen that the concentration and flow rate of that feed did not affect the temperature correction factor. Mathematical models have been developed based on these experimental data for both permeate flux and the Cu (II) removal. It was noted that the permeate flux model matched the experimental data, while the Cu (II) removal model did not show a perfect match. In addition to the above, the research highlights for subsequent studies the possibility of a deep link between experimental work and mathematical models.

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Section: Introductionmentioning

confidence: 99%

A Study of Copper (II) Ions Removal by Reverse Osmosis under Various Operating Conditions

et al. 2022

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“…It is suggested that adsorption is one of the best methods, not only because of its simplicity and potential for regeneration but also because it is a cost-effective and environmentally friendly technology for removing heavy metals from wastewater [1][2][3][4][5][6][7][8][9][10]. Various materials have been suggested for use as a sorbent for contaminated water, including clay minerals, zeolites, zero-valent iron, polymers, activated carbon, adsorption resin, and natural organic materials.…”

Section: Introductionmentioning

confidence: 99%

“…The development of new cheaper adsorbents with high efficiency based on natural materials become a must for many industries [5,[8][9][10][11]. Many papers have been published on the use of modified materials for the removal of heavy metal ions from aqueous media [17,[30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Modification of Natural Peat for Removal of Copper Ions from Aqueous Solutions

Shvartseva

Skripkina

Gaskova

et al. 2022

Water

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This study aimed at estimating peat adsorption properties for copper ion removal from aqueous solutions during peat modification. Two peat modifications have been studied using batch tests and quantitatively reproduced with instrumental analysis by using spectrometric, potentiometric, and thermodynamic modeling methods. The first variation—mechanical activation—was carried out in a planetary mill; for the second one—mechanochemical activation—dry sodium percarbonate (Na2CO3∙1.5H2O2) was added. The adsorption of copper ions was studied in the concentration range from 10–150 mg/L with an interaction time from 0.25–12 h. Both modifications led to significant changes in the interaction energy in the adsorption layer; thus, the acceptor properties of macromolecules were enhanced from natural peat to mechanically activated peat and mechanochemically activated peat. FTIR spectra, specific surface area characteristics, and sorption experiments show the predominantly chemical nature of copper sorption. Maximum adsorption capacity was determined to be 24.1, 42.1, and 16.0 mg/g for natural peat, mechanically activated peat, and mechanochemically activated peat, respectively. The example of peat mechanochemically oxidized with Na2CO3∙1.5H2O2 shows that the improvement in the physicochemical properties (CBET and specific surface area) plays a smaller role in the sorption capacity in relation to copper ions than the presence of phenolic and carboxyl groups, the content of which decreases during oxidation.

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“…; therefore, appropriate treatment of the wastewaters is crucial to prevent negative impacts on the environment. To the best of our knowledge, one of the most suitable techniques for the extraction of heavy metals from solutions is based on sorption/exchange processes with the use of porous materials such as natural and synthetic zeolites [1], mesoporous silica [2,3], clays [4][5][6][7][8], carbon nanotubes [9][10][11], activated carbon [12,13], biomass adsorbents [12][13][14][15], polymers [16], etc. The adsorption, separation, and ion-exchange properties of zeolites stem from their distinctive three-dimensional porous framework structure [17].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium Isotherms and Kinetic Effects during the Adsorption of Pb(II) on Titanosilicates Compared with Natural Zeolite Clinoptilolite

Tsvetanova

Barbov

Rusew

et al. 2022

Water

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The present study focuses on the adsorption of Pb(II) by the H-form of titanosilicates (ETS-4, GTS-1) and clinoptilolite. The H-forms were prepared by first exchanging the extra-framework cations—Na+, K+, Ca2+, etc.—with NH4+, and by subsequent thermal treatment for obtaining H-forms. The purity and thermal behaviour of the initial, NH4+, and H-forms of ETS-4, GTS-1, and clinoptilolite were analysed by powder XRD, while the morphology and size of the particles were determined by SEM. The chemical composition of the solids and the solutions was obtained by WDXRF and ICP-OES, respectively. The kinetics research of the Pb(II) adsorption processes was based on WDXRF and ICP-OES. The H-forms of the materials displayed favourable properties for the adsorption of Pb(II). The best behaviour in this respect was demonstrated by GTS-1 when compared to ETS-4 and clinoptilolite.

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New insights into the capture performance and mechanism of hazardous metals Cr3+ and Cd2+ onto an effective layered double hydroxide based material

Cited by 184 publications

References 81 publications

A Study of Copper (II) Ions Removal by Reverse Osmosis under Various Operating Conditions

A Study of Copper (II) Ions Removal by Reverse Osmosis under Various Operating Conditions

Modification of Natural Peat for Removal of Copper Ions from Aqueous Solutions

Equilibrium Isotherms and Kinetic Effects during the Adsorption of Pb(II) on Titanosilicates Compared with Natural Zeolite Clinoptilolite

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