As(V) retention and As(III) simultaneous oxidation and removal on a MnO2-loaded polystyrene resin

Lenoble, Véronique; Laclautre, Christelle; Serpaud, Bernard; Deluchat, Véronique; Bollinger, Jean‐Claude

doi:10.1016/j.scitotenv.2003.12.012

Cited by 175 publications

(90 citation statements)

References 46 publications

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“…Manganese dioxide can also be used as adsorbent for removal arsenic, but its adsorption capacity is commonly low (Lenoble et al, 2004) and this limits its application. To improve the removal efficiency, many composite adsorbents containing MnO 2 have been synthesized.…”

Section: Mno 2 -Based Composite Adsorbentsmentioning

confidence: 99%

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Research progress of novel adsorption processes in water purification: A review

2008

Journal of Environmental Sciences

395

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As an effective, efficient, and economic approach for water purification, adsorbents and adsorption processes have been widely studied and applied in different aspects for a long time. In the recent years, a lot of novel adsorption processes have been developed for enhancing the efficiency of removing the organic and inorganic contaminants from water. This article reviews some new adsorbents and advanced adsorption methods that specialize in their compositions, structures, functions, and characteristics used in water treatment. The review emphasizes adsorption/catalytic oxidation process, adsorption/catalytic reduction process, adsorption coupled with redox process, biomimetic sorbent and its sorption behaviors of POPs, and modified adsorbents and their water purification efficiency.

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Section: Mno 2 -Based Composite Adsorbentsmentioning

confidence: 99%

“…The MDCS showed a good removal performance for both arsenate and arsenite. Lenoble et al (2004) achieved an R-MnO 2 adsorbent by loading manganese dioxide on a polystyrene resin matrix. The composite adsorbent had a markedly higher arsenic removal capacity than that of manganese dioxide.…”

Section: Mno 2 -Based Composite Adsorbentsmentioning

confidence: 99%

Research progress of novel adsorption processes in water purification: A review

2008

Journal of Environmental Sciences

395

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“…In addition, the oxidation potential of MnO 2 is relative low and fit for specific oxidation of As(III). Manganese dioxide can also be used as adsorbent for removal arsenic, but its adsorption capacity is low (Lenoble et al, 2004) and this limits its application.…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

et al. 2007

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Adsorbent OxidationArsenite Removal a b s t r a c t Arsenite (As(III)) is more toxic and more difficult to remove from water than arsenate (As(V)).As there is no simple treatment for the efficient removal of As(III), an oxidation step is always necessary to achieve higher removal. However, this leads to a complicated operation and is not cost-effective. To overcome these disadvantage, a novel Fe-Mn binary oxide material which combined the oxidation property of manganese dioxide and the high adsorption features to As(V) of iron oxides, were developed from low cost materials using a simultaneous oxidation and coprecipitation method. The adsorbent was characterized by BET surface areas measurement, powder XRD, SEM, and XPS. The results showed that prepared Fe-Mn binary oxide with a high surface area ð265 m 2 g À1 Þ was amorphous. Iron and manganese existed mainly in the oxidation state þIII and IV, respectively. Laboratory experiments were carried out to investigate adsorption kinetics, adsorption capacity of the adsorbent and the effect of solution pH values on arsenic removal. Batch experimental results showed that the adsorbent could completely oxidize As(III) to As(V) and was effective for both As(V) and As(III) removal, particularly the As(III). The maximal adsorption capacities of As(V) and As(III) were 0:93 mmol g À1 and 1:77 mmol g À1 , respectively. The results compare favorably with those obtained using other adsorbent. The effects of anions such as SO 2À 4 , PO 3À 4 , SiO and humic acid (HA), which possibly exist in natural water, on As(III) removal were also investigated. The results indicated that phosphate was the greatest competitor with arsenic for adsorptive sites on the adsorbent. The presence of sulfate and HA had no significant effect on arsenic removal. The high uptake capability of the Fe-Mn binary oxide makes it potentially attractive adsorbent for the removal of As(III) from aqueous solution.

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“…1. The original BC exhibited broad peaks at around 0.388 and 0.208 nm, which are assigned to hkl 002 and overlapping 101 and 100 planes, respectively (Keiluweit et al 2010 Lenoble et al (2004), who successfully loaded d-MnO 2 on the surface of polystyrene resin. Selected physicochemical properties of HMO-free and all of the HMO-loaded BCs are listed in Table 1.…”

Section: Resultsmentioning

confidence: 99%

A novel manganese-oxide/biochar composite for efficient removal of lead(II) from aqueous solutions

Wang

Sheng

Qiu

2014

Int. J. Environ. Sci. Technol.

117

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Biochar (BC) derived from pyrolysis of plant biomass can be used as an inexpensive adsorbent for removal of aqueous heavy metals. In the present study, amorphous hydrous manganese oxide was loaded onto BC to fabricate a novel manganese-oxide/biochar (Mn/BC) composite for further enhancing lead(II) removal by sorption from water. Mn/BC was characterized by X-ray diffraction, scanning electron microscope, and specific surface area analysis. After impregnation with 3.65 % Mn, BC raised the removal efficiency of lead(II) from 6.4 to 98.9 % at pH 5.00. This improvement is attributed to the increase in surface hydroxyls and the decrease in pH PZC (pH at the point of zero charge) of carbon. The maximum monolayer adsorption of lead(II) on Mn/BC at 298 K was five times that on BC. The smaller pseudo-second-order rate constant of Mn/BC compared with that of BC indicated that the sorption rate of Mn/BC is faster than that of BC. The calculated thermodynamic parameters implied that the sorption of lead(II) is a spontaneous and endothermic process. The results suggest that Mn/BC composite is a promising adsorbent for the efficient removal of lead(II) from water.

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As(V) retention and As(III) simultaneous oxidation and removal on a MnO2-loaded polystyrene resin

Cited by 175 publications

References 46 publications

Research progress of novel adsorption processes in water purification: A review

Research progress of novel adsorption processes in water purification: A review

Preparation and evaluation of a novel Fe–Mn binary oxide adsorbent for effective arsenite removal

A novel manganese-oxide/biochar composite for efficient removal of lead(II) from aqueous solutions

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