A turbidimetric method for determining elemental sulphur

Hart, M. G. R.

doi:10.1039/an9618600472

Cited by 31 publications

(13 citation statements)

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“…Where elemental S has been used as a fertilizer, extraction with KC140 is likely to underestimate the S status of the system because of its inability to dissolve unoxidized elemental S. Although it is known that elemental S can be extracted with organic solvents such as chloroform (Barrow 1968) and acetone (Hart 1961), it is unlikely that their inclusion in the extraction procedure will be successful in predicting the future S availability because of the effects of particle size, temperature and moisture in modifying S release from elemental S. The model which predicts S release from elemental S developed by McCaskill and Blair (1989) may prove a valuable adjunct to extraction with KC1-40 in these situations.…”

Section: Discussionmentioning

confidence: 99%

A soil sulfur test for pastures and crops

Blair¹,

Chinoim²,

Lefroy³

et al. 1991

Soil Res.

214

110

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Soil testing for S has generally been unsuccessful when using extractants that remove only sulfate from the soil.An assessment of a range of extractants to predict S status was undertaken on soil samples taken from 18 field trials in northern N.S.W. The extractants were water, 0 . 0 1 M monocalcium phosphate (MCP) and 0 . 5 M NaHC03, 0.25 M KC1 heated for 3 h at 100, 80, 40, or 25°C. The highest correlation between soil S test level and % maximum yield was found in the 40°C KC1 extractant (r2 = 0.73). This compares with an r2 value of 0.47 for the widely used MCP extractant.A study using a soil from a pot experiment where rice was grown showed that the KC1 extract removed more S from the H1 reducible (ester sulfate) fraction than did MCP. This S fraction is believed to be important in supplying S to plants.A comparison of the specific radioactivity of soil extractants and rice plants confirmed that the KC1 40°C extract removes S from similar soil pools as do plants. The procedure is recommended for wider evaluation.

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Section: Discussionmentioning

confidence: 99%

A soil sulfur test for pastures and crops

Blair¹,

Chinoim²,

Lefroy³

et al. 1991

Soil Res.

214

110

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“…A gas chromatography method has also been described as an alternative for S 0 quantification in soil samples (Richard et al, 1977). The amount of S 0 dissolved in acetone can also be determined using turbidimetry after replacing the solvent with water, dispersing the colloidal S 0 and determining absorbance at 420 nm (Hart, 1961). The S 0 can also be extracted from soil with chloroform, treated with HNO 3 -KNO 3 , and determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES) (Zhao et al, 1996) or sulfur Kedge X-ray absorption spectroscopy (Burton, 2009).…”

Section: Methods For Determination Of S 0 Oxidation In Soilmentioning

confidence: 99%

Sulfur in agriculture

Lucheta¹,

Lambais

2012

Rev. Bras. Ciênc. Solo

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SUMMARYSulfur (S) deficiency in soils is becoming increasingly common in many areas of the world as a result of agronomic practices, high biomass exportation and reduced S emissions to the atmosphere. In this review, the incidence and commercial exploitation of S pools in nature are discussed, as well as the importance of S for plants and the organic and inorganic S forms in soil and their transformations, especially the process of microbiological oxidation of elemental sulfur (S 0 ) as an alternative to the replenishment of S levels in the soil. The diversity of S 0 -oxidizing microorganisms in soils, in particular the genus Thiobacillus, and the biochemical mechanisms of S 0 oxidation in bacteria were also addressed. Finally, the main methods to measure the S 0 oxidation rate in soils and the variables that influence this process were revised.Index terms: fertilization, agriculture, microbial diversity, soil fertility. RESUMO: ENXOFRE NA AGRICULTURA A deficiência de enxofre (S) nos solos vem se tornando cada vez mais comum em várias áreas do mundo em razão de práticas agronômicas, alta exportação de biomassa e redução das emissões atmosféricas. Nesta revisão são abordados a incidência, a exploração comercial e estoques de S na natureza, a importância do S para as plantas, as formas orgânicas e inorgânicas no solo e suas transformações, assim como, principalmente, o processo de oxidação microbiológica do enxofre elementar (S 0 ) como alternativa para a reposição dos níveis de S do solo. Também é abordada a diversidade de microrganismos oxidantes de S

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“…The phosphorus concentration and potassium concentration were determined by Vanadomolybdo-Phosphoric yellow color method in the nitric acid and flame emission spectrophotometer methods described by Jackson [17] . The concentration of sulfur was determined by the Turbidimetric method, according to Hart [18] . The feedstock and digested effluent pH were measured using an electronic pH meter (PHS-25 pH meter, Shanghai, China).…”

Section: Methodsmentioning

confidence: 99%

"Evaluation of biogas production from mono and co-digested cow manure with household waste "

2021

JCBSC

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This study aimed to evaluate the biogas production from mono and codigestion of cow manure (CM) with household waste. The feedstock and digestive composition were measured to determine their effects on biogas production. The batches were prepared for mono and co-digestion of CM mixed with 5% of Soft Waste (SO), Food Waste (FW), combined waste (SO and FW) with inoculum (INCL) using lab-based prototype digester. Four experimental groups (MCM, SOCM, FWCM and SOFWCM) were set up using mixing ratios of CM: H2O:

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A turbidimetric method for determining elemental sulphur

Cited by 31 publications

References 0 publications

A soil sulfur test for pastures and crops

A soil sulfur test for pastures and crops

Sulfur in agriculture

"Evaluation of biogas production from mono and co-digested cow manure with household waste "

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