Copper(II) and lead(II) removal from aqueous solution in fixed-bed columns by manganese oxide coated zeolite

Han, Runping; Zou, Weihua; Li, Hongkui; Li, Yanhu; Shi, Jie

doi:10.1016/j.jhazmat.2006.03.016

Cited by 203 publications

(99 citation statements)

References 16 publications

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“…4). The same trend has been observed by Han et al (2006) when they followed lead removal by chemically modified Chinese zeolite in glass column mode.…”

Section: Effect Of Feeding Flow Ratesupporting

confidence: 82%

“…; T = 30°C. Indeed, for an aqueous lead concentration of 200 mg L -1 , an adsorbent dosage of 5 g L -1 and at pH 3.6, the removal capacity of BGMW is relatively important compared with a Turkish clinoptilolite (Turan et al 2005), Ecuadorian heulandites and clinoptilolite (Calvo et al 2009) and chemically modified Chinese zeolite (Han et al 2006). Because of the relative scarcity of dynamic assays, this comparison has been extended to batch systems.…”

Section: Effect Of Influent Lead Concentrationmentioning

confidence: 99%

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Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Mlayah

Jellali

2014

Int. J. Environ. Sci. Technol.

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Lead removal from synthetic solutions and real wastewater by Bianco Gioia marble wastes as abundant, renewable and eco-friendly materials was studied under different experimental conditions in a continuous stirring tank reactor. These marble wastes were found to be very efficient in removing lead for several experimental situations. Indeed, for initial aqueous pH values higher than 3.6, a lead removal efficiency of about 100 % was achieved even for high aqueous concentrations (200 mg L -1 ), important feeding flow rates (60 mL min -1 ) and low marble waste dosage (2 g L -1 ). The best removal capacity (175.7 mg g -1 ) was obtained for an initial lead concentration of 200 mg L -1 , a marble waste dose of 5 g L -1 and an aqueous pH of 5. Even using the real wastewater with low aqueous pH (1.1), lead was also completely removed using 20 g L -1 of the tested marble wastes. According to the energy-dispersive spectroscopy and X-ray diffraction analyses, lead removal seems to be controlled by both precipitation as cerussite (PbCO 3 ) and hydrocerussite (Pb 3 (CO 3 ) 2 (OH) 2 ), and adsorption onto the surface particles through cation exchange and complexation. The proposed low-cost material efficiently removes lead present in synthetic solutions and real wastewaters and constitutes an interesting environmental management option.

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“…4). The same trend has been observed by Han et al (2006) when they followed lead removal by chemically modified Chinese zeolite in glass column mode.…”

Section: Effect Of Feeding Flow Ratesupporting

confidence: 82%

Section: Effect Of Influent Lead Concentrationmentioning

confidence: 99%

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Mlayah

Jellali

2014

Int. J. Environ. Sci. Technol.

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“…For further improvement of the adsorption capacity, MnO 2 is then loaded on the porous sample. Actually, MnO 2 itself has a strong interaction with Pb (II) ions, and the superior performance as adsorbents or additives has already been reported by some studies [11][12][13]. However, it has also been reported that MnO 2 addition to TiO 2 induces less UV light absorption of TiO 2 [14,15].…”

Section: Introductionmentioning

confidence: 93%

Improving Effect of MnO<sub>2</sub> Addition on TiO<sub>2</sub>-Photocatalytic Removal of Lead Ion from Water

Kobayashi

Kanasaki

Nozaki

et al. 2017

J. of Wat. & Envir. Tech.

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Removal of Pb (II) ions from water was carried out by a coupling approach of adsorption and photoelectrodeposition over a porous TiO 2 photocatalyst loaded with MnO 2 . The addition of MnO 2 onto the porous TiO 2 accelerated the photocatalytic oxidation of Pb (II) ions, which was caused by a strong interaction between MnO 2 and Pb (II) ions. Since the same effect was not observed on the photocatalytic degradation of methylene blue over MnO 2 /TiO 2 photocatalysts, the photoelectrodeposition reaction rate appears to be determined by the amount of Pb (II) ions adsorbed on the surface of porous TiO 2 loaded with MnO 2 .

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“…Besides, the use of synthetic adsorbents is considered inapt for developing countries because of its high manufacturing cost. Recently, attempts have been made to increase the sorption capacity of natural adsorbents towards heavy metals by chemical modification of their surface (Knoerr et al 2013;Ş an et al 2009;Zhu et al 2012;Liu et al 2013;Han et al 2006Han et al , 2009Jeon et al 2009;Zou et al 2009;Choi et al 2012). The common and highest concentration for heavy metal adsorption in aqueous solution in most recent investigations has been between 200 and 300 mg/l.…”

Section: Introductionmentioning

confidence: 99%

Adsorption isotherm studies of Cu (II) and Co (II) in high concentration aqueous solutions on photocatalytically modified diatomaceous ceramic adsorbents

2017

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Photocatalytically modified ceramic adsorbents were synthesized for the removal of high concentration Cu (II) and Co (II) ions from their aqueous solutions. The raw material, diatomaceous aluminosilicate mineral was modified using silver and anatase titanium oxide nanoparticles. Batch adsorption experiment was carried out on the targeted metal ions and the results were analyzed by the Langmuir and Freundlich equation at different concentrations (100-1000 mg/l) and the characteristic parameters for each adsorption isotherm were determined. As-received raw materials do not exhibit any sorption capacity for high concentration Cu 2? and Co 2? adsorbates. However, the adsorption isotherms for modified diatomaceous ceramic adsorbents could be fitted well by the Langmuir model for both Cu 2? and Co 2? with correlation coefficient (R) of up to 0.99953. The highest and lowest monolayer coverage (q max ) were 121.803 and 31.289 mg/g for Cu 2? and Co 2? , respectively. The separation factor (R L ) in the experiment was less than one (\1), indicating that the adsorption of metal ions on the Ag-TiO 2 -modified ceramic adsorbent is favorable. The highest adsorption capacity (K f ) and intensity (n) constants obtained from Freundlich model are 38.832 (Cu 2? on ZEO-T) and 5.801 (Co 2? on STOX-Z).

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Copper(II) and lead(II) removal from aqueous solution in fixed-bed columns by manganese oxide coated zeolite

Cited by 203 publications

References 16 publications

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Study of continuous lead removal from aqueous solutions by marble wastes: efficiencies and mechanisms

Improving Effect of MnO<sub>2</sub> Addition on TiO<sub>2</sub>-Photocatalytic Removal of Lead Ion from Water

Adsorption isotherm studies of Cu (II) and Co (II) in high concentration aqueous solutions on photocatalytically modified diatomaceous ceramic adsorbents

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