Electrokinetic Properties of Variable Charge Clays in the Presence of an Anionic Xanthan Polysaccharide and Inorganic Electrolytes
スポンサーリンク
概要
- 論文の詳細を見る
Faculty of Agriculture, Kochi University / Faculty of Agriculture, Kochi UniversityThe effect of the electrolytes (MA: NaCl, MgCl_2, PbCl_2, and NaH_2PO_4) on the polymeric (a) weak-stabilization (PWST), (b) flocculation (PFL), and (c) stabilization (PST) of allophane in the presence of xanthan polysaccharide (GX), was investigated by electrophoretic mobility (EPM) measurements. At pH 6.5 (i.e.p.), with further addition of chlorides, the decrease in the absolute value of the negative EPM (|-EPM|) of allophane in 0.01 m_M MA solutions indicated the suppression of PWST and PST, respectively, probably due to the decrease in the repulsive force originating from the negatively charged GX-chains with the addition of MA. By first addition of MA, the decrease in the |-EPM| value of allophane in 0.01 m_M NaCl and MgCl_2 solutions also showed the suppression of PWST and PST. In 0.01 m_M PbCl_2 and NaH_2PO_4 solutions, the increase in the EPM and |-EPM| values of allophane reflected the dispersion due to the specific adsorption of Pb^<2+> and H_2PO_4^- ions on the negatively and positively charged sites of the surface, respectively. At pH 4.5, the decrease in the |-EPM| value of allophane in 0.1 m_M NaH_2PO_4 solution indicated the suppression of PST due to the specific adsorption of H_2PO_4^- ion on the positively charged surface of the particles. The absence of (i) PWST in the presence of GX and (ii) high stability in the presence of cationic lead species for the flocculated imogolite at pH 8.5 can be attributed to the tubular structure proposed by Cradwick et al. (1972: Nature (London) Phys. Sci., 240, 187-189), namely, to the difficulty in the development of a negative charge on the outer surface of its unit particle.
- 社団法人日本土壌肥料学会の論文
著者
-
Horikawa Yukiya
Faculty Of Agriculture Kochi Univers
-
He Ming
Faculty Of Agriculture Kochi University
関連論文
- AN ELECTRON MICROSCOPIC INVESTIGATION ON PARTICLE ASSOCIATION BETWEEN IMOGOLITE AND OTHER CLAY MINERALS IN MIXED SUSPENSIONS
- Stability of Allophane, Allophanic Clay, and Allophane-Halloysite Floc in Aqueous Solutions of an Anionic Exocellular Heteropolysaccharide (Gum Xanthan) from Xanthomonas campestris
- Flocculation and Stabilization of Allophane in the Presence of an Anionic Microbial Polysaccharide (Gum Xanthan) and Several of Its Hydrolytic Intermediates
- STUDIES ON THE POTASSIUM-ADSORPTION CAUSED BY SOIL-REDUCTION PART I. : The Occurrence of the Differential Potassium-Adsorption Under Submergence.
- Semiquantitative Determination of Imogolite and Al-Rich Allophane (Si / Al ≃ 1 : 2) in Some Volcanic Ash Soils in San'in Region by a Combination of Thermogravimetry-Differential Thermal Analysis and Trimethylsilylation Analysis of Soil Clays
- Sedimentation Behavior of Dispersed Particles of Clay and Silt in Acidic and Alkaline Suspensions of Inorganic Materials from Various Volcanic Ash Soils(Soil Chemistry and Mineralogy)
- Partial Deflocculation of Mutual Flocs of Allophane and Halloysite by Xanthan and Chitosan and Relevance to Particle Arrangement in the Flocs
- STATE ANALYSIS OF IRON IN ALLOPHANIC CLAYS. II. IRON L-EMISSION BAND SPECTRA FROM ALLOPHANIC CLAYS AND HISINGERITE BY THE USE OF AN X-RAY MICROANALYZER
- Adsorption of Xanthan Polymer on Allophane and Effect on the Changes in Colloidal Stability of Allophane by Heavy Metal Ions
- Electrokinetic Properties of Variable Charge Clays in the Presence of an Anionic Xanthan Polysaccharide and Inorganic Electrolytes
- Effect of Inorganic Electrolytes on the Stability of Allophane in Aqueous Solutions of Anionic Xanthan Polysaccharide
- Effect of Particle Size of Halloysite on the Defiocculation of Mutual Flocs of Allophane and Halloysite at pH 6.5 in Dilute Xanthan Polysaccharide Solutions
- SPECTROPHOTOMETRIC MEASUREMENT OF FLOCCULATION RATE OF SELECTED CLAYS
- Stability Behavior of Soil Colloidal Suspensions in Relation to Sequential Reduction of Soils : I. Turbidity of Soil Colloidal Suspensions and Change Induced by Submergence of Paddy Soils
- STATE ANALYSIS OF IRON IN ALLOPHANIC CLAYS. I. MOSSBAUER EFFECT ANALYSIS OF IRON IN ALLOPHANIC CLAYS
- Stability Behavior of Soil Colloidal Suspensions in Relation to Sequential Reduction of Soils : IV. Formation of Ferrous Precipitate as a Cause of Clay Dispersion
- Stability Behavior of Soil Colloidal Suspensions in Relation to Sequential Reduction of Soils : III. Electrokinetic Behavior of Colloidal Particles in Submerged Soils
- ELECTROKINETIC PHENOMENA OF AQUEOUS SUSPENSIONS OF ALLOPHANE AND IMOGOLITE
- ty Behavior of Soil Colloidal Suspensions in Relation to Sequential Reduction of Soils : II. Turbidity Changes by Submergence of Paddy Soils at Different Temperatures
- ELECTROPHORETIC MOBILITY OF BINARY MIXTURES OF IMOGOLITE AND SOME OTHER CLAY MINERALS IN AQUEOUS SUSPENSIONS
- MUTUAL FLOCCULATION BETWEEN SELECTED CLAY MINERALS AND SOME KINDS OF ASEXUAL SPORES FROM SOIL-BORNE FUNGI
- STUDIES ON THE POTASSIUM-ADSORPTION CAUSED BY SOIL-REDUCTION (PART II) : Possible Mechanisms of Differential Potassium-Adsorption and Relation to the Agronomical Significance
- ELECTROKINETIC BEHAVIOR OF ALLOPHANE-IMOGOLITE MIXTURES IN ALKALINE MEDIA
- EFFECTS OF IONIC SURFACE ACTIVE AGENTS ON THE FLOATABILITY AND ELECTROPHORETIC MOBILITY OF SELECTED CLAYS