pH effect on phosphate sorption by crystalline MnO2

Mustafa, S.; Zaman, Muhammad Iqbal; Khan, Shahab Ullah

doi:10.1016/j.jcis.2006.05.020

Cited by 70 publications

(31 citation statements)

References 24 publications

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“…Phosphorus sorption to MnO 2 was studied as a function of pH by Mustafa et al (2006), and P sorption was observed to increase with increasing P concentration and decrease with increasing pH. Mustafa et al (2008) indicate that phosphate adsorbs to β-MnO 2 via an outersphere surface complex (indicated by ••••):…”

Section: Extractable Manganesementioning

confidence: 99%

Determinants of total and available phosphorus in forested Alfisols and Ultisols of the Ozark Highlands, USA

2015

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Section: Extractable Manganesementioning

confidence: 99%

Determinants of total and available phosphorus in forested Alfisols and Ultisols of the Ozark Highlands, USA

2015

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“…Studies [28] have revealed that iron (hydr)oxides are effective for phosphate adsorption and play a major role in phosphate immobilization in water bodies and soils. Manganese oxides are also important scavengers of different anions such as phosphate in the freshwater and marine environment [29]. These two materials are both low cost and environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Zhang

Liu

et al. 2009

Journal of Colloid and Interface Science

386

155

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a b s t r a c tPhosphate removal is important in the control of eutrophication of water bodies and adsorption is one of the promising approaches for this purpose. A Fe-Mn binary oxide adsorbent with a Fe/Mn molar ratio of 6:1 for phosphate removal was synthesized by a simultaneous oxidation and coprecipitation process. Laboratory experiments were carried out to investigate adsorption kinetics and equilibrium, in batch mode. The effects of different experimental parameters, namely contact time, initial phosphate concentration, solution pH, and ionic strength on the phosphate adsorption were investigated. The adsorption data were analyzed by both Freundlich and Langmuir isotherm models and the data were well fit by the Freundlich isotherm model. Kinetic data correlated well with the pseudo-second-order kinetic model, suggesting that the adsorption process might be chemical sorption. The maximal adsorption capacity was 36 mg/g at pH 5.6. The phosphate adsorption was highly pH dependent. The effects of anions such as Cl À ; SO 4 2À , and CO 3 2À on phosphate removal were also investigated. The results suggest that the presence of these ions had no significant effect on phosphate removal. The phosphate removal was mainly achieved by the replacement of surface hydroxyl groups by the phosphate species and formation of inner-sphere surface complexes at the water/oxide interface. In addition, the adsorbed phosphate ions can be effectively desorbed by dilute NaOH solutions. This adsorbent, with large adsorption capacity and high selectivity, is therefore a very promising adsorbent for the removal of phosphate ions from aqueous solutions.

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“…It was found that the sorption amount of phosphate and sulfate on sorbent in the equilibrium state increased when the initial concentration of Eu(III) in solution increased. Mustafa et al [41,42] and Nemeth et al [43] found that phosphate can sorb on the sorbent, which can be influenced by pH, temperature and the concentration of phosphate.…”

Section: Phosphate and Sulfate Sorption On The Sorbentmentioning

confidence: 99%

Sorption of Eu(III) on Th4(PO4)4P2O7: effects of pH, complexing anions and fulvic acid

Qian

Cui

Liu

et al. 2015

J Radioanal Nucl Chem

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The sorption of Eu(III) on Th 4 (PO 4 ) 4 P 2 O 7 was studied under ambient conditions using the batch technique. The effects of pH, the concentrations of Eu(III) on Th 4 (PO 4 ) 4 P 2 O 7 sorption were investigated. The sorption characteristics of sulfate, phosphate and fulvic acid (FA) on Th 4 (PO 4 ) 4 P 2 O 7 was explored in the presence Eu(III). The results indicated that sorption of Eu(III) on Th 4 (PO 4 ) 4 P 2 O 7 was strongly affected by pH and the concentrations of Eu(III). Eu(III) sorption onto Th 4 (PO 4 ) 4 P 2 O 7 was greatly enhanced in FA and phosphate media than in KNO 3 . The Langmuir, Freundlich and D-R model were used to simulate the sorption isotherms of Eu(III) at four different medium. FA sorption isotherm can be described by Langmuir model in presence and absence of Eu(III) in solution.

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pH effect on phosphate sorption by crystalline MnO2

Cited by 70 publications

References 24 publications

Determinants of total and available phosphorus in forested Alfisols and Ultisols of the Ozark Highlands, USA

Determinants of total and available phosphorus in forested Alfisols and Ultisols of the Ozark Highlands, USA

Removal of phosphate from water by a Fe–Mn binary oxide adsorbent

Sorption of Eu(III) on Th4(PO4)4P2O7: effects of pH, complexing anions and fulvic acid

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