Ueber das Absorptionsvermögen der Ackererde

Bemmelen, J. M. van

doi:10.1007/bf01381567

Cited by 4 publications

(5 citation statements)

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“…But in this case the calcium compounds formed in the soil are attacked by the salt solution, calcium being replaced by potassium and brought into solution as calcium nitrate. Such an explanation is in agreement with the findings of Van Bemmelen (5) and other investigators (70) on the subject of exchange of bases between soils and salt solutions, the former having found that when potassium chloride solution was added to the soil, almost a complete change of potassium for calcium and magnesium took place. The toxicity of normal iron salts at a certain concentration is well known, and Ruprecht and Morse (61) found that in the unproductivity of ammonium-sulfate fertilized plots of the Massachusetts Agricultural Experiment Station, ferric and manganese salts were also contributing factors.…”

Section: Discussion Of Resultssupporting

confidence: 92%

Aluminum as a Factor in Soil Acidity

Mirasol¹

1920

Soil Science

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JOSE JISON MIRASOL in saline solutions, Veitch, however, noted the filtrates were frequently acid in reaction, and attributed it to the presence, in considerable quantities, of aluminum, iron and manganese in the solution. He further found that when the apparent acidity of the extract was equivalent to more than 1 or 2 cc. 0.05 N alkali a precipitate was formed on titration which he identified as the hydroxides of aluminum, iron and manganese. Ames and SchoUenberger (3) by 156 JOSE JISON MIRASOL after boiling the extract for a long time. They ascribed the acidity to soluble organic acids in the soil. The so-called humus has been subjected to a critical examination by Shorey (63) who found thus far at least thirteen organic acids, among which are oxalic acid, succinic acid, saccharic acid, acrylic acid, picoline carboxylic acid, parafiinic acid and lagnoceric acid. But it is believed that under ordinary conditions the organic substances present in the soil cannot bring a condition unfavorable to plant growth.

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Section: Discussion Of Resultssupporting

confidence: 92%

Aluminum as a Factor in Soil Acidity

Mirasol¹

1920

Soil Science

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“…According to the adsorption theory the reaction of an acid soil with an alkali is a combination process involving both the neutralization of the H-ions present and the adsorption of the base. This agrees with Fisher's5 conclusion from his study of the adsorption of CaO from calcium bicarbonate solutions by soils that "there would appear to be little doubt therefore that the lime requirement of a soil is the sum of two quantities: (1) the lime required to neutralize soil acids, and (2) the lime actually adsorbed by the soil complex, and it is impossible at present to differentiate between these." In this connection it should be mentioned that the value of "K" of the adsorption isotherm used in the present work gives a measure of the total amount of acidity in the soil in the form of adsorbed and unadsorbed H ions.…”

Section: Adsorption and Soil Aciditysupporting

confidence: 82%

“…(2) X + = Km, where K is a constant. Factors affecting Soil Reaction 127 by substituting in (1) from which…”

Section: Experimental Methodsmentioning

confidence: 99%

“…The extent to which these same constants may be used in predicting the H-ion concentrations at still other soil-water ratios forms a measure of the degree of conformity of the concentrations observed to the usual adsorption distribution. The details of the mathematical procedure involved in the calculation of the constants is given in the footnote.1 1 Methods of calculating constants d, ß and K.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Factors affecting Soil Reaction. I

Salter¹,

Morgan²

1923

J. Phys. Chem.

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“…Modeling the sorption phenomenon began in 1878 when Van Bemmelen [9] found that adsorption followed a relationship later known as the Freundlich equation [10]. The equation has the general form…”

Section: Introductionmentioning

confidence: 99%

Estimation of partition coefficients for five trace metals in sandy sediments and application to sediment quality criteria

Hassan

Garrison

Allen

et al. 1996

Enviro Toxic and Chemistry

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Six low‐capacity natural adsorbents‐were identified for the five metal cations (cadmium, copper, nickel, lead, and zinc) for which the U.S. Environmental Protection Agency is developing sediment quality criteria (SQC). The adsorbents were commercial sea sand and chromatographic sand (both from natural sources) and four sandy sediments collected from different parts of the continental United States. Batch adsorption experiments were conducted for each sediment with a mixture of the five cations at low concentrations (from about 15 to 700 μg/L) using a 48‐h equilibration time. The distribution coefficients (Kds) were calculated using the initial linear segment of the plotted adsorption isotherms; selection of the linear segment involved repetitive regression analysis of selected data points. Chromatographic sand at pH 3.7 showed the lowest adsorption capacity for all the metal cations. An increase in pH of the medium generally resulted in a higher Kd, whereas an increase in ionic strength resulted in a lower Kd Chromatographic sand, especially at low natural pH levels, may serve as a limiting adsorbent or a benchmark for maximum pore‐water concentrations for these five metal cations because its associated pore water would contain higher levels of the cations than other sediments. These measured Kds, which are expected to be minimum values for natural sediments, were applied to screen sediment samples for SQC. An equation that can predict the Kd for each of the five metals for sandy sediments at neutral and lower pH levels was derived from the regression of the measured Kds against the pH of the six sediments used in this study. This equation was tested with a data set from Lake Michigan sediment samples. Porewater metal concentrations calculated from the predicted Kd values were used to predict whether a sediment would pass SQC in terms of predicted interstitial water criteria toxic units; 16 of 38 of these sediments were predicted not to exceed proposed SQC for metals.

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Ueber das Absorptionsvermögen der Ackererde

Cited by 4 publications

References 0 publications

Aluminum as a Factor in Soil Acidity

Aluminum as a Factor in Soil Acidity

Factors affecting Soil Reaction. I

Estimation of partition coefficients for five trace metals in sandy sediments and application to sediment quality criteria

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