Changes in Zero Point of Charge (ZPC), Specific Surface Area (SSA), and Cation Exchange Capacity (CEC) of kaolinite and montmorillonite, and strongly weathered soils caused by Fe and Al coatings

Sakurai, Katsutoshi; Teshima, Atsushi; Kyuma, Kazutake

doi:10.1080/00380768.1990.10415711

Cited by 46 publications

(27 citation statements)

References 9 publications

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“…Therefore, base saturation is low but Al saturation is high in the tropical Ultisols. When evaluating the ZPC value by the STPT method (Sakurai et al, Lggg), Al dissolution during determination of ZPC did not proceed greatly (Sakurai et al, 1990). Since oo is defined as a remaining charge atZPC, the magnitude of oo was closely correlated with the amount of exchangeable bases.…”

Section: Soil Chemical Propertiesmentioning

confidence: 99%

Characteristics of Ultisols under Different Wildfire History in South Sumatra, Indonesia: I. Physico-chemical Properties.

Kadir

悟史

克年

et al. 2001

Tropics

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Fire has become a great threat to Indonesian rainforest. However, informative data quantifying the effects of wildfire on the soils are still limited. We have been studying the leftover effect of forest fire on characteristics of Indonesian Ultisols. Current experiment evaluated physico-chemical characteristics of soils under different ecosystems with different wildfire history. Seven sites, which could be grouped into unburnt sites (conservation forest (CF), Pine forest (iF), Acacia mangium plantation (AM), and home garden (HG)) and burnt sites (Acacia mangilan plantations bumt in i995, L997, and 1998) referred as AM-b95, AM-b97, and AM-b98, respectiveiy, were sampled. Organic layei was found in CR PR and AM but not in any other sites. Morphologically, soils of unbumi sites had darker A horizon than those of burnt sites. In spite of lack of significant differences, bulk density decreased with increasing period after fire, indicating the recovery process. Although the upper layer oi the bumt soils was physically harder than that of the unbumt soils, soil hardness did not aipear to be a limiting factor for plant growth. Soil in the unbumt sites was chemically more acid but contained mqre organic C and N than that in the bumt sites. Surface soil of PF, AM-b98, and HG had much higher exchangeable Ca than any other sites. However the CEC was low across the study sites, irrespectivi of the high clay content. Available P was also low, and conelated with high Al solubility. Crysialline Al, Si, and Fe contents of all soils were higher than amorphous Al, Si, and Fe oxides. ZpC values were low across the study sites. However, higher negative charge generated by organic matter had resulted in lower ZPC values at the surface layer as compared with the subsurface Lyer. Although soils in the unbumt sites showed a better physico-chemical potential than the bumt site;, in general Ultisols in the study sites had undergone strong weathering and showed low natural fertility potential.

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Section: Soil Chemical Propertiesmentioning

confidence: 99%

Characteristics of Ultisols under Different Wildfire History in South Sumatra, Indonesia: I. Physico-chemical Properties.

Kadir

悟史

克年

et al. 2001

Tropics

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“…As in the case of iron, several laboratory studies of the association of kaolinite with A1 hydroxide or with hydroxy-Al-polymers, and of the modifications of the surface properties of the kaolinite produced by this coating, have been described (Bundy and Murray 1973, El-Swaify and Emerson 1975, E1-Swaify 1976, Goldberg and Glaubig 1987, Robert et al 1983, Oades 1984, Sakurai et al 1989.…”

Section: Introductionmentioning

confidence: 99%

“…Although most research has centred on the influence of these interactions on soil aggregation (Blackmore 1973, Arduino et al 1989, Colombo andTorrent 199 l) and related physical properties, such as hydraulic conductivity, porosity, friability and the state of flocculation/dispersion (Deshpande et al 1968, EI-Rayah and Rowell 1973, E1-Swaify and Emerson 1975, E1-Swaify 1976, Shanmuganathan and Oades 1982, they also have significant effects on ion adsorption and exchange (Chao et al 1964, Sakurai et al 1989.…”

Section: Introductionmentioning

confidence: 99%

Effects of Iron and Aluminium Oxides on the Colloidal and Surface Properties of Kaolin

Arias

Barral

Dı́az-Fierros

1995

Clays and clay miner.

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Abstract--The association between clay silicates, and iron and aluminium oxides has a major influence on the chemical and physical properties of soils. In this work the interaction of a kaolin substrate with iron and aluminium oxides and/or hydroxides obtained by basification of solutions of the metal ions was compared to that of quartz. Both precipitates were obtained in the presence of the substrates.The aluminium precipitates had higher crystallinity, and thus led to smaller increases in specific surface area than those of iron, and were more effective modifiers of the surface electrical properties of the kaolinoxide mixtures. At concentrations as low as 0.43% A1 (g/100 g of substrate) the point of zero charge (PZC) of the components with variable charge was measurable, while Fe required 2.23% and gave lower PZCs than those of corresponding concentrations of A1. In both cases the PZCs shifted to higher pH as metal concentration was increased, as did the flocculation interval of colloidal suspensions of kaolin, which were close to the PZCs (where these were evaluated).The A1 and Fe oxides precipitated on quartz had higher crystallinities. Both metals increased the specific surface area to a similar extent, with an almost linear relationship to metal concentration. Samples containing ca. 6.5% Fe or A1 had similar or slightly higher PZCs than corresponding kaolin samples.The results were interpreted by assuming, in the case of kaolin, the union of the metal precipitate with the basal faces of the substrate, so decreasing the negative charge at this surface; and in the case of quartz, the formation of a hydroxide coating that neutralizes the negative charge on the silica surface. The difference between the results obtained for each metal was attributed to the different morphologies of their oxide precipitates.

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“…The procedure to precipitate A1 hydroxides on soil particles was basically identical with that described by Sakurai et al (1990).…”

Section: Methodsmentioning

confidence: 99%

“…Added A1 hydroxides would partly form interlayer complexes and enhance heat resistance of the interlayer spaces of the clays. Using scanning electron microscopy, Sakurai et al (1990) observed that A1 hydroxides that had been precipitated in the same manner gave a smooth surface on montmorillonite and kaolinite. They confirmed the formation of hydroxy A1 interlayer in montmorillonite from the decrease in EGME-SSA after A1 addi- tion.…”

Section: Changes In Dispersibility and Charge Characteristics After Amentioning

confidence: 99%

Effect of Addition of Al Hydroxides on Changes in Dispersibility and Charge Characteristics of Soils

Itami

Kitagawa

Kyuma

et al. 1996

Soil Science and Plant Nutrition

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Changes in Zero Point of Charge (ZPC), Specific Surface Area (SSA), and Cation Exchange Capacity (CEC) of kaolinite and montmorillonite, and strongly weathered soils caused by Fe and Al coatings

Cited by 46 publications

References 9 publications

Characteristics of Ultisols under Different Wildfire History in South Sumatra, Indonesia: I. Physico-chemical Properties.

Characteristics of Ultisols under Different Wildfire History in South Sumatra, Indonesia: I. Physico-chemical Properties.

Effects of Iron and Aluminium Oxides on the Colloidal and Surface Properties of Kaolin

Effect of Addition of Al Hydroxides on Changes in Dispersibility and Charge Characteristics of Soils

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