DIFFUSE REFLECTANCE INFRARED SPECTRA AND ION-ADSORPTION PROPERTIES OF THE PHOSPHATE SURFACE COMPLEX ON GOETHITE
スポンサーリンク
概要
- 論文の詳細を見る
The structure of the phosphate surface complex on goethite was investigated by means of diffuse reflectance infrared spectroscopy and Na^+ and Cl^- adsorption associated with phosphate adsorption was measured. The differential spectra of the phosphate surface complex were obtained by subtracting the spectra of goethite from those of phosphated goethite. The spectrum of phosphate adsorbed on the goethite surface changed with increasing pH and this change occurred in one step over pH range from 3.3 to 11.9. The positions of absorption bands did not change with surface coverage under similar pH conditions. Changes of Na^+~P/P_<ads>. [(Na^+ adsorption of phosphated goethite-- Na^+ adsorption of goethite)/P adsorption] with pH was closely related to the spectral change with pH. It was revealed that the PO-H bond of phosphate surface complex on goethite dissociates with increasing pH and that the dissociated phosphate adsorbs Na^+. The pH of half dissociation of the PO-H bond was about 6.7 under the conditions where the temperature=298 K and ionic strength (I)=0.01. These results support the idea of the formation of the bridging binuclear-type surface complex as the mechanism of phosphate adsorption on goethite.
- 社団法人日本土壌肥料学会の論文
著者
-
WATANABE Yutaka
National Epilepsy Center, Shizuoka Higashi Hospital
-
Nanzyo Masami
National Institute Of Agricultural Sciences
-
Watanabe Yutaka
National Epilepsy Center Shizuoka Higashi Hospital
関連論文
- Interictal and Ictal Magnetoencephalographic Study in Patients with Medial Frontal Lobe Epilepsy
- Photosensitive and Nonphotosensitive Electronic Screen Game-Induced Seizures
- A Preliminary Study of Oceanic Bomb Radiocarbon Inventory in the North Pacific during the Last Two Decades
- INFRARED SPECTRA OF PHOSPHATE SORBED ON IRON HYDROXIDE GEL AND THE SORPTION PRODUCTS
- Overview of NOPACCS(Northwest Pacific Carbon Cycle Study)
- Recommendation of Early Surgery from the Viewpoint of Daily Quality of Life
- Total Amount of Oceanic Excess CO_2 Taken from the North Pacific Subpolar Region
- Dilution of North Pacific Intermediate Water Studied with Chlorofluorocarbons
- Electroclinical and Magnetoencephalographic Analysis of Epilepsy in Patients With Congenital Bilateral Perisylvian Syndrome
- Annual Anthropogenic Carbon Transport into the North Pacific Intermediate Water through the Kuroshio/Oyashio Interfrontal Zone: An Estimation from CFCs Dsitribution
- PHOSPHATE SORPTION ON THE CLAY FRACTION OF KANUMA PUMICE
- DIFFUSE REFLECTANCE INFRARED SPECTRA AND ION-ADSORPTION PROPERTIES OF THE PHOSPHATE SURFACE COMPLEX ON GOETHITE
- MATERIAL BALANCE ASSOCIATED WITH PHOSPHATE SORPTION BY AMORPHOUS CLAYS, SILICA-ALUMINA GEL AND SYNTHETIC GOETHITE
- PREPARATION OF DIOCTAHEDRAL VERMICULITE FROM MUSCOVITE
- AN ASPECT ON INTERLAYER POTASSIUM OF MICA MINERALS IN SOILS
- Improved Method for Calculating Anthropogenic CO_2 in the Upper Layer of the North Pacific Subtropical Gyre along 175°E