Lime enhanced chromium removal in advanced integrated wastewater pond system

Tadesse, I.; Isoaho, S.A.; Green, F.B.; Puhakka, Jaakko A.

doi:10.1016/j.biortech.2005.04.028

Cited by 44 publications

(18 citation statements)

References 5 publications

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“…adsorption and/or precipitation of metal compounds by raising pH (Chlopecka and Adriano, 1996), such as Cr (Tadesse et al, 2006), As (Kundu and Gupta, 2008), Zn, Pb, Ni, Cd, Cu and Co (Gray et al, 2006;Hale et al, 2012). 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%

“…Obviously, lime is a viable established immobilization reagent to remediate heavy metal pollution, especially for Cr and Cd. Previous studies have shown that lime could achieve 46-72% of Cr(III) removal efficiency in 1 day detention time (Chlopecka and Adriano, 1996;Tadesse et al, 2006), and is a low-cost reagent for the arsenic-rich hazardous waste remediation (Kundu and Gupta, 2008). In contrast, nano-iron powder is the best fixing agent.…”

Section: Immobilization Of Crg Heavy Metalsmentioning

confidence: 99%

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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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Section: Comparison Of Alternative Remediation Technologies For Recycmentioning

confidence: 99%

Section: Immobilization Of Crg Heavy Metalsmentioning

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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“…The Cr 3+ is an essential element playing an important role in the metabolism of glucose, lipid, and protein whereas Cr 6+ is reported to be toxic to the biological systems (Mustafa et al 2002;Wen et al 2002;Gazola et al 2006). It has been reported that the presence of strong oxidants in soil and water can change Cr 3+ to harmful Cr 6+ (Tadesse et al 2006). Due to its toxic nature, the removal of Cr 6+ by using adsorbents (Mustafa et al 2002;Gode and Moral 2008), has been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Co-Ion Effect on Cr3+ Sorption by Amberlyst-15(H+)

Mustafa

Shah

Akhtar

et al. 2010

Water Air Soil Pollut

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Cr 3+ sorption on strong acid exchanger Amberlyst-15(H + ) is studied as a function of time and temperature using CrCl 3 .6H 2 O and [Cr 4 (SO 4 ) 5 (OH) 2 ] solutions. The rate is found to be governed by a mixed diffusion for both the solutions and faster for Cl 1− solution than SO 4 2− . The exchange capacities are found to be higher for Cl 1− system than SO 4 2− . From the rate constant values, the energies of activation are calculated using the well-known Arrhenius equation. Equilibrium data is explained with the help of the Langmuir equation. The Langmuir parameters are also found to be higher for exchange from the chloride solutions. Various thermodynamic parameters (ΔH o , ΔS o , and ΔG o ) for Cr 3+ exchange on the resin are calculated. The ΔG o values are found to be negative while ΔH o and ΔS o are positive for both the Cr 3+ /Cl 1− and Cr 3+ /SO 4 2− systems. It is suggested that in case of Cl 1− solutions, the metal is exchanged as Cr 3+ , while in case of SO 4 2− solutions, the metal exchanging specie is CrSO 4 + .

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“…[2][3][4] The presence of strong oxidants in soil and water can change Cr(III) to harmful Cr(VI). 5 A lot of literature is available on Cr(VI) removal but very limited on chromium(III) removal from aqueous solutions. 6 The separation techniques commonly used for the removal of chromium(III) from aqueous solutions are solvent extraction, ion exchange, co-precipitation, membrane processes and sorption.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Equilibrium Studies of Chromium(III) Removal by Macroporous Ion Exchanger Amberlyst‐15 (H⁺)

Mustafa¹,

Shah

Naeem

et al. 2010

Chin. J. Chem.

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Chromium(III) sorption on macroporous strong cation exchanger Amberlyst-15 (H ＋ ) was studied as a function of time and temperature. The rate constant values for chromium(III) sorption were calculated both for film and particle diffusion processes. The temperature was found to have a positive effect on both the diffusional processes. From the rate constant values, the energy of activation was calculated using the well-known Arrhenius equation.The high values of energy of activation confirmed the film diffusional nature of the process. Equilibrium data were explained with the help of Langmuir equation. Various thermodynamic parameters ( H ∆ , S ∆ and G ∆ ) from chromium(III) exchange on the resin were calculated. The G ∆ values were found to be negative while both the H ∆ and S ∆ were positive.

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Lime enhanced chromium removal in advanced integrated wastewater pond system

Cited by 44 publications

References 5 publications

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

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

Co-Ion Effect on Cr3+ Sorption by Amberlyst-15(H+)

Kinetic and Equilibrium Studies of Chromium(III) Removal by Macroporous Ion Exchanger Amberlyst‐15 (H⁺)

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Lime enhanced chromium removal in advanced integrated wastewater pond system

Cited by 44 publications

References 5 publications

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

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

Co-Ion Effect on Cr3+ Sorption by Amberlyst-15(H+)

Kinetic and Equilibrium Studies of Chromium(III) Removal by Macroporous Ion Exchanger Amberlyst‐15 (H+)

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Kinetic and Equilibrium Studies of Chromium(III) Removal by Macroporous Ion Exchanger Amberlyst‐15 (H⁺)