Cadmium (Cd2+) removal by nano zerovalent iron: surface analysis, effects of solution chemistry and surface complexation modeling

Boparai, Hardiljeet K.; Joseph, Meera; O'Carroll, D. M.

doi:10.1007/s11356-013-1651-8

Cited by 184 publications

(73 citation statements)

References 45 publications

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“…Some examples include heavy metals, nitrate, chlorinated organic solvents and azo-dyes (Cundy et al, 2008;Yan et al, 2013;Fu et al, 2014). Due to their large surface area and high number of active sites, nZVI enhance the remediation efficiencies of those contaminants remarkably (Boparai et al, 2013;Wang et al, 2010a,b;Karabelli et al, 2008;Li and Zhang, 2006).…”

Section: Nzvi For Environmental Remediation Of Heavy Metalsmentioning

confidence: 99%

Heavy metal release due to aging effect during zero valent iron nanoparticles remediation

2015

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Section: Nzvi For Environmental Remediation Of Heavy Metalsmentioning

confidence: 99%

Heavy metal release due to aging effect during zero valent iron nanoparticles remediation

2015

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“…The shell contains oxidized iron that is mostly magnetite Fe 3 O 4 and often with maghemite (c-Fe 2 O 3 ) or lepidocrocite (c-FeOOH) Phenrat et al 2016;Boparai et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Effective Pb2+ removal from water using nanozerovalent iron stored 10 months

et al. 2017

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Heavy metal removal from water required reliable and cost-effective considerations, fast separation as well as easy methodology. In this piece of research, nanozerovalent iron (NZVI) was prepared as ideal sorbent for Pb 2? removal. The sample was characterized using X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), and atomic force microscope (AFM-SPM). Batch experiments comprised the effect of pH value and contact time on the adsorption process. The same NZVI was stored for a shelf time (10 months) and the batch experiment was repeated. The outcomes of the investigation assured that NZVI publicized an extraordinary large metal uptake (98%) after a short contact time (10 h). The stored sample revealed the same effectiveness on Pb 2? removal under the same conditions. The results of the physical properties, magnetic susceptibility, and conductance were correlated with the adsorption efficiency. This work offers evidence that these NZVI particles could be potential candidate for Pb 2? removal in large scale, stored for a long time using a simple, green, and cost-effective methodology, and represent an actual feedback in waste water treatment.

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“…performed using Visual MINTEQ, showed that Cd is present nearly entirely as Cd 2? below pH 8.0 [37]. Therefore, equilibrium pH values measured in our study (Fig.…”

Section: Sorption Of CD 2?mentioning

confidence: 50%

Evaluation of the effects of treatment factors on the properties of bio-apatite materials

et al. 2014

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Animal bones have been studied as a resource of low-crystalline apatite for immobilization of toxic heavy metals. Chemical and thermal treatments can be applied for selective removal of bone organic constituents. In this study, the impact of different treatment factors was determined by experimental design methodology, and comparison of the estimated effects was performed in order to optimize the treatment conditions. Fractional factorial design with five variables at two levels was applied for factors screening. The type of chemical reagent (H 2 O 2 or NaOH), its concentration (0.1 or 2 mol/L), reaction temperature (20 or 60°C), contact time (1 or 3 h) and sample annealing (without or at 400°C) were considered as process variables. Structural properties of bone sorbents, loss of ignition, point of zero charge, surface functional groups, specific surface area, chemical composition, and Cd 2? sorption efficiency, were selected as system responses. Samples significantly differed in respect to the organic phase content and composition, thus mechanisms of Cd 2? sorption were complex. Statistical analysis has revealed that, between all studied factors, temperature treatment was the most important for sorbents increased specific surface area, porosity and cation sorption. Furthermore, NaOH was more effective than H 2 O 2 , while the effects produced by variation of other factors were less pronounced. The highest proportion of bio-apatite with desired low crystallinity and high specific surface area was achieved by synergetic effects of chemical treatment with NaOH and thermal treatment at 400°C.

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Cadmium (Cd2+) removal by nano zerovalent iron: surface analysis, effects of solution chemistry and surface complexation modeling

Cited by 184 publications

References 45 publications

Heavy metal release due to aging effect during zero valent iron nanoparticles remediation

Heavy metal release due to aging effect during zero valent iron nanoparticles remediation

Effective Pb2+ removal from water using nanozerovalent iron stored 10 months

Evaluation of the effects of treatment factors on the properties of bio-apatite materials

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