Enhanced paramagnetic Cu2+ ions removal by coupling a weak magnetic field with zero valent iron

Xiao, Jiang; Qiao, Jinli; Lo, Irene M.C.; Wang, Lei; Guan, Xiaohong; Lu, Zhanpeng; Zhou, Gongming; Xu, Chao

doi:10.1016/j.jhazmat.2014.10.044

Cited by 116 publications

(72 citation statements)

References 34 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, the influence of Cu II /EDTA molar ratios on Cu II -EDTA removal by Fe 0 /WMF was determined at pH 6.0 and the results are shown in Fig. 3a reduced by Fe 0 , as documented in our previous study [22]. The transformation of Cu II -EDTA to Fe III -EDTA was verified by the variation of UV-vis absorption of the solutions, as shown in Fig.…”

Section: Influence Of Cu II /Edta Molar Ratios On Cu Ii -Edta Removalsupporting

confidence: 68%

“…Therefore, WMF weakened the pH dependence of Cu II -EDTA removal by Fe 0 and significantly accelerated Cu II -EDTA removal. The role of WMF in enhancing contaminants sequestration by Fe 0 has been explicitly revealed in our previous studies [21,22] and the WMF effects should be attributed to the WMF-induced local galvanic corrosion of Fe 0 and accelerated mass transfer in the diffusion boundary layer of Fe 0 .…”

Section: Enhanced Removal Of Cu II -Edta Removal By Fe 0 /Wmf Comparementioning

confidence: 72%

“…The stock solutions of Cu II -EDTA were prepared by dissolving CuSO 4 ·5H 2 O and Na 2 -EDTA ( = 1:1, unless otherwise stated) in 1.0 L DI water with an initial Cu II concentration of 1.0 g L -1 . The Fe 0 particles used in this study were identical to those used in our previous study [22], with a BET specific surface area of 0.15 m 2 /g and a d 50 of 40 μm.…”

Section: Materials and Reagentsmentioning

confidence: 99%

“…The experimental setup used in this study was similar with that used in our previous study [22]. In brief, two pieces of neodymium-iron-boron permanent magnets were placed beneath the reactor to provide an inhomogeneous WMF, with the maximum magnetic flux intensity determined to be ~20 mT.…”

Section: Batch Experiments and Chemical Analysismentioning

confidence: 99%

“…Recently, a novel approach, employing a weak magnetic field (WMF) to improve the reactivity of Fe 0 , was applied to enhance Se IV , As III/V , and Cu II removal by Fe 0 [20][21][22]. Therefore, the objectives of this paper were to 1) investigate the feasibility of Cu II -EDTA sequestration by Fe 0 combined with WMF (Fe 0 /WMF); 2) clarify the mechanism of Cu II -EDTA removal and the role of Fe II in the process; 3) design a magnetic propeller agitator to offer magnetic field in view of practical application.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Decomplexation and subsequent reductive removal of EDTA-chelated CuII by zero-valent iron coupled with a weak magnetic field: Performances and mechanisms

Guan

Xiao

Qiao

et al. 2015

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

Section: Influence Of Cu II /Edta Molar Ratios On Cu Ii -Edta Removalsupporting

confidence: 68%

Section: Enhanced Removal Of Cu II -Edta Removal By Fe 0 /Wmf Comparementioning

confidence: 72%

Section: Materials and Reagentsmentioning

confidence: 99%

Section: Batch Experiments and Chemical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Decomplexation and subsequent reductive removal of EDTA-chelated CuII by zero-valent iron coupled with a weak magnetic field: Performances and mechanisms

Guan

Xiao

Qiao

et al. 2015

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

Magnetic Nanomaterials for Water Remediation

Liu

Hong

2017

Magnetic Nanomaterials - Fundamentals, Synthesis and Applications

View full text Add to dashboard Cite

Magnetic Field Directed Rare‐Earth Separations

et al. 2019

View full text Add to dashboard Cite

The separation of rare-earth ions from one another is challenging due to their chemical and physical similarities. Nearly all rare-earth separations rely upon small changes in ionic radii to direct speciation or reactivity.H erein, we show that the intrinsic magnetic properties of the rare-earth ions impact the separations of light/heavy and selected heavy/heavy binary mixtures.U sing TriNOx 3À ([{(2-t BuNO)-C 6 H 4 CH 2 } 3 N] 3À )r are-earth complexes,w ee fficiently and selectively crystallized heavy rare earths (Tb-Yb) from amixture with light rare earths (La and Nd) in the presence of an external Fe 14 Nd 2 Bm agnet, concomitant with the introduction of ac oncentration gradient (decrease in temperature). The optimal separation was observed for an equimolar mixture of La:Dy,which gave an enrichment factor of EF La:Dy = 297 AE 31 for the solid fraction, compared to EF La:Dy = 159 AE 22 in the absence of the field, and achieving a99.7 %pure Dy sample in one step.T hese results indicate that the application of am agnetic field can improve performance in am olecular separation system for paramagnetic rare-earth cations.

show abstract

Enhanced paramagnetic Cu2+ ions removal by coupling a weak magnetic field with zero valent iron

Cited by 116 publications

References 34 publications

Decomplexation and subsequent reductive removal of EDTA-chelated CuII by zero-valent iron coupled with a weak magnetic field: Performances and mechanisms

Decomplexation and subsequent reductive removal of EDTA-chelated CuII by zero-valent iron coupled with a weak magnetic field: Performances and mechanisms

Magnetic Nanomaterials for Water Remediation

Magnetic Field Directed Rare‐Earth Separations

Contact Info

Product

Resources

About