Nanoscale zero-valent iron for the removal of Zn2+, Zn(II)–EDTA and Zn(II)–citrate from aqueous solutions

Kržišnik, Nina; Mladenovič, Ana; Škapin, Andrijana Sever; Škrlep, Luka; Ščančar, Janez; Milačić, Radmila

doi:10.1016/j.scitotenv.2013.12.113

Cited by 52 publications

(29 citation statements)

References 37 publications

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“…It is better the ratio of iron to aluminum not to be lower. A part of ZVAl can be in standby mode with a ZVI/ZVAl mass ratio (22). This result is in agreement with the obtained results from previous studies (24,33).…”

Section: The Effect Of Various Elements Constituting the Media On Thesupporting

confidence: 93%

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The Use of Acid-Washed Iron/Aluminum Mixture in Permeable Reactive Barrier for the Elimination of Different Heavy Metal Ions From Water

Samadi¹,

Asgari²,

Rahmani³

et al. 2017

Avicenna J Environ Health Eng

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In this experimental study, the performance of a fixed bed column containing a mixture of iron and aluminum modified with acid, as a reaction bed, was evaluated for the removal of heavy metals of cadmium, nickel, and copper. The tests were carried out by feeding the columns with aqueous solutions at the concentration of 100 mg/L using four iron/aluminum granular mixtures at various volume ratios (100/0, 50/50, 75/25, 25/75 and 0/100), and pH (3, 5, 7) for a total of 28 column tests. Results showed that metal ion removal was mainly accomplished via redox reactions that initiated the precipitation of mineral phases. At pH 5 and flow rate of 1 mL/min, the removal efficiency of cadmium, nickel, and copper at the 50/50 ratio of modified iron and aluminum was obtained higher than 99% and this removal efficiency could be kept about 50 hours. It seems that the column with the volume ratio of 75/25 of iron and aluminum mixture was the most efficient column for removing the heavy metals with the most suitable iron content and also high hydraulic performance due to the suitable aluminum content. It is therefore seen that the mixture of iron and aluminum can be used as an environmentally and economically viable remediation technology for the subsequent prevention of groundwater contamination.

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Section: The Effect Of Various Elements Constituting the Media On Thesupporting

confidence: 93%

“…pH has been introduced as the most effective variable in heavy metal removal in previous studies (16,21,22); thus the effect of pH was studied in this study. As shown in Figs.…”

Section: Effect Of Inlet Ph On Heavy Metal Removal Efficiencymentioning

confidence: 99%

The Use of Acid-Washed Iron/Aluminum Mixture in Permeable Reactive Barrier for the Elimination of Different Heavy Metal Ions From Water

Samadi¹,

Asgari²,

Rahmani³

et al. 2017

Avicenna J Environ Health Eng

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“…The literatures have reported that agglomeration of nZVI may decrease the reactive surface area on the nZVI surface. Due to this reason, electron transfer from the reactive surface of nZVI to Zn was inhibited and Zn 2+ could not be reduced to Zn [19,20]. 2+ Removal by nZVI Figure 4 shows the effects of suspension pH on the removal efficiency of Pb 2+ by nZVI.…”

Section: Effects Of Nzvi Concentration On Removalmentioning

confidence: 99%

Removal of Lead by Nanoscale Zerovalent Iron in Surfacewater

et al. 2016

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This study investigates removal of Lead (Pb 2+ ) by nanoscale zerovalent iron (nZVI) in surface water under various environmental conditions. Particles size of synthesized nZVI was in the range of 35.57-49.62 nm (<100 nm) and congregated to each other. Remarkable removal of Pb 2+ (k = 0.30 min −1 ) was observed in nZVI suspension (0.32 g/L) in 10 min, while no significant of Pb 2+ removal was observed in suspension alone at neutral pH. The removal of Pb 2+ was significantly dependent on the suspension pH and concentrations of Pb 2+ and nZVI. Percent removal of Pb 2+ significantly decreased as the concentrations of Pb 2+ increased. Removal efficiency of Pb 2+ decreased (49-25 %) as the pH increased from neutral to basic conditions (pH 7-9). As concentration of nZVI increased (0.06-0.10 g/L), the removal efficiency increased approximately 1.67 times (42-70 %). Experimental results from this study provide basic knowledge on the role of nZVI as a reductant to remove Pb 2+ in surface water at different environment conditions.

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“…Nano-iron is also a suitable material for heavy metal contaminants for in situ remediation (Ponder et al, 2000) with high remediation efficiency of Zn(II) (Kržišnik et al, 2014), Cu (II), Cd (II), Cr(VI) and Pb(II) (Liu et al, 2013;Ponder et al, 2000;Xi et al, 2010), owing to their large surface area (Waychunas et al, 2005).…”

Section: Comparison Of Alternative Remediation Technologies For Recycmentioning

confidence: 99%

Comparison of alternative remediation technologies for recycled gravel contaminated with heavy metals

Gao

Huang

et al. 2015

Waste Manag Res

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To evaluate the effects of different remediation methods on heavy metals contaminated recycled gravel, three immobilization agents (monopotassium phosphate, lime, nano-iron) and two mobilization agents (glyphosate, humic acid (HA)) were studied and compared. Results indicated that nano-iron powder was found to be more effective to immobilize Zn, Cu, Pb and Cd. Meanwhile, glyphosate presents a higher mobilization effect than HA with removal rates of about 66.7% for Cd, more than 80% for Cr, Cu and Zn, and the highest removal percentage of 85.9% for Cr. After the mobilization by glyphosate, the leaching rates of Zn, Cu and Cr were about 0.8%, and below 0.2% for Pb and Cd. The leaching rates after nano-iron powder treatment were 1.18% for Zn, 0.96% for Cr, 0.61% for Cu, 0.45% for Pb and Cd not detected. The formation and disappearance of metal (Zn/Cu/Cr/Pb/Cd) compounds were firmly confirmed through X-ray diffraction and scanning electron microscopy analyses on crystalline phases and morphological surface structures.

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Nanoscale zero-valent iron for the removal of Zn2+, Zn(II)–EDTA and Zn(II)–citrate from aqueous solutions

Cited by 52 publications

References 37 publications

The Use of Acid-Washed Iron/Aluminum Mixture in Permeable Reactive Barrier for the Elimination of Different Heavy Metal Ions From Water

The Use of Acid-Washed Iron/Aluminum Mixture in Permeable Reactive Barrier for the Elimination of Different Heavy Metal Ions From Water

Removal of Lead by Nanoscale Zerovalent Iron in Surfacewater

Comparison of alternative remediation technologies for recycled gravel contaminated with heavy metals

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