Material balance associated with phosphate sorption by amorphous clays, silica-alumina gel and synthetic goethite

Nanzyo, Masami; Watanabe, Yutaka

doi:10.1080/00380768.1981.10431287

Cited by 13 publications

(4 citation statements)

References 21 publications

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“…7, Table 1). This feature was also observed when the adsorbents consisted of goethite, alumina gel, silica alumina gel and clay fraction of weathered pumice, respectively (8,13,14). At the initial pH of 4.3, the value of Cladsorption decreased with increasing amount of p'hosphate sorption while the value of Na+ adsorption remained slightly negative.…”

Section: Change In Na+ and Ci-adsorption On Iron Hydroxide Gel With Pmentioning

confidence: 59%

Infrared Spectra of Phosphate Sorbed on Iron Hydroxide Gel and the Sorption Products

Nanzyo

1986

Soil Science and Plant Nutrition

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Infrared absorption spectra of phosphate sorbed on iron hydroxide gel were obtained by applying the differential diffuse reflectance method. Absorption bands due to P-O stretching vibration were observed at 1,110 and 1,010 cm-1 at pH 12.3. With decreasing pH, these absorption bands gradually shifted to 1,100 and 1,020 cm-I at pH 4.9. At pH 2.3, they became a broad single absorption band at 1,060 cm-I. At pH 11 or above, the difference in the Na+ adsorption between phosphated iron hydroxide gel and iron hydroxide gel was almost equal to the amount of phosphate sorption. This finding shows that phosphate was retained on the iron hydroxide gel surface as a bidentate ligand at a high pH.It was concluded that at a high pH phosphate was sorbed on iron hydroxide gel as a binuclear surface complex similar to that on goethite; the change in spectra for P-O stretching vibration with decreasing pH value was mainly caused by an increase in the fraction of amorphous iron phosphate; at pH 2.3, the phosphate sorption product consisted of amorphous iron phosphate.

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Section: Change In Na+ and Ci-adsorption On Iron Hydroxide Gel With Pmentioning

confidence: 59%

Infrared Spectra of Phosphate Sorbed on Iron Hydroxide Gel and the Sorption Products

Nanzyo

1986

Soil Science and Plant Nutrition

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“…Phosphate anions have free electron pairs on oxygen atoms and, hence, are readily coordinated (particularly, by transition metal atoms), thus, substituting the most labile ligands in the coordination sphere (Nanzyo and Watanabe, 1981;Kudeyarova, 1991). Increased pH in the salt extract ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Properties of Soil Native and Ortho- and Pyrophosphate-Modified Ferro-Humic Complexes and Their Effect on Solubility and Toxicity of the Products of Exogenous Zn Binding

Kudeyarova

Guzev

2005

Biol Bull Russ Acad Sci

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“…It has been suggested that the adsorption mechanisms of arsenate are similar to those of phosphate (Fendorf et al 1997;O'Reilly et al 2001). Thus, these AAs would be chemisorbed by variablecharge minerals to make inner-sphere complexes by ligand exchange reactions as well as by phosphate sorption (Obihara and Russell 1972;Nanzyo and Watanabe 1981). In addition, the phenyl and methyl groups in these AAs might be adsorbed onto SOM by hydrophobic interactions.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Adsorption and mobility of aromatic arsenicals in Japanese agricultural soils

Maejima¹,

Murano²,

Iwafune³

et al. 2011

Soil Science and Plant Nutrition

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We investigated the adsorption and mobility of aromatic arsenicals (AAs) in two types of Japanese agricultural soils in batch and column leaching experiments. The amounts of AAs adsorbed onto a Fluvisol (a sandy loam) and an Andosol (a light clay) decreased in the order of phenylarsonic acid (PAA) > methylphenylarsinic acid (MPAA) > diphenylarsinic acid (DPAA) > methyldiphenylarsine oxide (MDPAO) > dimethylphenylarsine oxide (DMPAO). The amounts of all AAs adsorbed onto the Andosol, which had more amorphous minerals and organic carbon, were higher than those adsorbed onto the Fluvisol. The adsorbability of AAs increased with both an increasing arsenate proportion and a decreasing hydrophobicity. This result suggests that the mechanisms of adsorption of AAs onto soil are due mainly to ligand exchange reactions and less to hydrophobic interactions. Mobility in the Fluvisol decreased in the order of DMPAO (30 cm The mobility of MDPAO and DMPAO was higher than that of PAA and MPAA, and all AAs were less mobile in the Andosol than in the Fluvisol.

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Material balance associated with phosphate sorption by amorphous clays, silica-alumina gel and synthetic goethite

Cited by 13 publications

References 21 publications

Infrared Spectra of Phosphate Sorbed on Iron Hydroxide Gel and the Sorption Products

Infrared Spectra of Phosphate Sorbed on Iron Hydroxide Gel and the Sorption Products

Properties of Soil Native and Ortho- and Pyrophosphate-Modified Ferro-Humic Complexes and Their Effect on Solubility and Toxicity of the Products of Exogenous Zn Binding

Adsorption and mobility of aromatic arsenicals in Japanese agricultural soils

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