New Magnetic Field–enhanced Process for the Treatment of Aqueous Wastes

Ebner, Armin D.; Ritter, James A.; Ploehn, Harry J.; Kochen, R.L.; Navratil, J.D.

doi:10.1081/ss-100100709

Cited by 30 publications

(28 citation statements)

References 21 publications

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“…Recently, there has been increasing interest (1)(2)(3)(4) in the alternative use of magnetite (Fe 3 O 4 ) in high gradient magnetic separation (HGMS) processes for the removal of paramagnetic nanoparticles from solution. It has been shown theoretically (3,4) that because of its comparable saturation magnetization to iron and its smaller size, magnetite creates magnetic field gradients that are larger in magnitude than those created by traditional stainless steel wool.…”

Section: Introductionmentioning

confidence: 99%

Points of Zero Charge and Intrinsic Equilibrium Constants of Silica–Magnetite Composite Oxides

Shen

Ebner

Ritter

1999

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Points of Zero Charge and Intrinsic Equilibrium Constants of Silica–Magnetite Composite Oxides

Shen

Ebner

Ritter

1999

Journal of Colloid and Interface Science

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“…It has been used for many applications in biochemistry, microbiology, cell biology, analytical chemistry, mining ores, and environmental technology [13,14]. Thus, if the powder adsorbent/catalyst are magnetic, it could be recovered conveniently by magnetic separation technology.…”

Section: Introductionmentioning

confidence: 99%

Removal of azo-dye Acid Red B (ARB) by adsorption and catalytic combustion using magnetic CuFe2O4 powder

et al. 2004

Applied Catalysis B: Environmental

151

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The effectiveness of magnetic CuFe 2 O 4 powder as adsorbent/catalyst for the removal of azo-dye Acid Red B (ARB) from water by adsorption and subsequent catalytic combustion was studied. Magnetic CuFe 2 O 4 powder showed excellent adsorption properties towards ARB at pH < 5.5, and it could be conveniently recovered by magnetic separation technology after adsorption. The combustion decomposition of ARB in the presence or absence of CuFe 2 O 4 was studied by a system for thermal degradation studies (STDS) and in situ FTIR. The results indicated that different reactive pathways existed for the combustion under different conditions. In the presence of CuFe 2 O 4 , the temperature needed for oxidation reaction and for combustion was 150 and 300 • C, respectively. The reaction products were observed to be SO 2 , CO 2 , H 2 O, and nitrate. There was neither volatile organic compound (VOCs) emitted to atmosphere during reaction nor organic matter deposited on the surface of CuFe 2 O 4 after the combustion. Comparatively, in the absence of CuFe 2 O 4 , the oxidation and combustion of ARB required a higher temperature (300 and 500 • C, respectively) and produced a lot of toxic organic compounds emitted to atmosphere besides SO 2 , CO 2 and H 2 O during the reaction. In addition, sulfate was generated instead of nitrate. The experiments of adsorption-combustion cycles demonstrated that there was no evident change in adsorption properties and catalytic activity of magnetic CuFe 2 O 4 powder after seven cycles.

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“…Also, this net force is evaluated in terms of its relative importance to Brownian and hydrodynamic forces in the Stokes flow regime. The foundation of this work is based on the previous models of Ebner et al (17,18).…”

Section: Theoreticalmentioning

confidence: 99%

“…Recently, some researchers (16)(17)(18) have been exploring the use of magnetite as an alternative to stainless steel wool. Due to 1 To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%