The influence of sample size and heating time on soil weight loss‐on‐ignition

Schulte, E. E.; Kaufmann, Christian; Peter, J. B.

doi:10.1080/00103629109368402

Cited by 107 publications

(55 citation statements)

References 9 publications

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“…Other replacement reagents, such as humic acid also have been reported to provide an irreproducible result for certain types of soil. Thus, the development of an improved method for measurement of organic content was required (53).…”

Section: Total Organic Contentmentioning

confidence: 99%

“…This procedure was based on the strategy that Na2S was used as an anionic precipitant to provide HS· or S·2 anions to compete with the chelating reagent for the contaminating 53 metal cations. Calcium hydroxide [Ca(OH)2] enhanced this reaction by providing Ca +2 to compete for EDTA ligand by displacing metal from its chelator complex.…”

Section: 1 Recycling Of Chelating Reagentsmentioning

confidence: 99%

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Recycling of complexometric extractants to remediate a soil contaminated with heavy metals

Lee

Marshall

2002

J. Environ. Monitor.

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Equilibrations were performed with complexing reagent(s) to mobilise Cd, Cu, Mn, Ni, Pb and Zn from a contaminated urban soil. The metal-laden aqueous extract was treated with zero-valent magnesium (Mg 0 ) or bimetallic mixture (Pd 0 /Mg 0 or Ag 0 /Mg 0 ) to precipitate the heavy metals from solution while liberating the chelating reagent(s). Post precipitation, the pH of aqueous supernatant fraction was readjusted to y5 and the solution was re-combined with the soil particulates to extract more heavy metal pollutants. A sparing quantity of EDTA (10 mmoles) mobilised 32-54% of the 5 mmoles of heavy-metals from the soil with three cycles but only 0.1% of the iron was removed. Three successive extractions with a mixture of complexing reagents (3 mmoles), 1 : 1 EDTA plus HEDC [bis-(2-hydroxyethyl)-dithiocarbamate], mobilised y49% of the Pb, y18% of the Zn and y19% of the Mn burden but only 7% of the Cu, and 1% of the Fe from this soil. An appreciable fraction of the mobilised Pb and Cu and a portion of the Zn was cemented to the surfaces of the excess magnesium whereas virtually all of the Fe and Mn was removed from solution as insoluble hydroxides.

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Section: Total Organic Contentmentioning

confidence: 99%

Section: 1 Recycling Of Chelating Reagentsmentioning

confidence: 99%

Recycling of complexometric extractants to remediate a soil contaminated with heavy metals

Lee

Marshall

2002

J. Environ. Monitor.

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“…Soil organic matter was determined by loss-on-ignition (Schulte et al, 1991). A 1:1 water pH of the soil solution and electrical conductivity was determined according to Smith and Doran (1996).…”

Section: Soil Samplesmentioning

confidence: 99%

Effects of disturbance and ecosystem on decomposition

Neher

Barbercheck

El-Allaf

et al. 2003

Applied Soil Ecology

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Decomposition of organic matter integrates collective activities of organisms within the soil food web. We compared decomposition of museum board (predominantly cellulose) and balsa wood substrates in 18 sites chosen to represent a completely nested design with two disturbance levels nested within three ecosystems (agriculture, wetland, and forest) and ecosystems nested within three land resource regions (LRR) in North Carolina. Percentage mass remaining and daily rate of mass loss of museum board and balsa wood substrates were analyzed using repeated measures analysis of covariance with soil physical and chemical properties as covariates. At the end of the two-year monitoring period, the percentage of museum board and balsa wood substrates remaining was least in agricultural and wetland and greatest in forest ecosystems. Soil pH influenced the percentage of substrate remaining based on days of incubation, and its effects were greater than electrical conductivity, percentage soil organic matter, and total available soil nitrogen (N). Percentage of substrate remaining (museum board or balsa wood) was correlated negatively with pH for all sites, suggesting that pH should be included as a covariate if measures of decomposition are used as environmental indicators. Overall, rate of decomposition of museum board substrates distinguished between relative levels of disturbance in agricultural and wetland but not forest ecosystems. The rate of balsa wood decomposition distinguished between relative levels of disturbance in wetland but not forest or agricultural sites. Forest soils had consistently lower total N and electrical conductivity, and sometimes lower pH, associated with slower decomposition than disturbed wetlands or agricultural lands. We conclude that for short-term monitoring, measures of decomposition of predominantly cellulose substrates can be used to distinguish between relative levels of disturbance in agricultural and wetland but not forest systems. Differences in decomposition may signal either a change in decomposer community or condition of biotic and abiotic resources at a site.

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“…Major criticisms include: (a) with furnace temperatures between 425 and 5208C there is potential loss of CO 2 from minerals in soils or sediments containing inorganic carbon, for example in the form of siderite (FeCO 3 ), magnesite (MgCO 3 ) or rhodochrosite (MnCO 3 ) (Weliky et al, 1983); (b) conventional oven heating at temperatures below 1508C is not sufficient to drive off hygroscopic and intercrystalline water from clays and allophane, nor does it eliminate hydroxyl groups in sesquioxides or octahedral sheets in phyllosilicate layers (Mook and Hoskin, 1982;Grewal et al, 1991;Schulte et al, 1991); (c) it does not take account of possible decarboxylation of organic functional groups (Grewal et al, 1991); and (d) simple application of the 1.724 factor to OM values derived from LOI in order to estimate organic carbon is not appropriate, because the nature of OM varies significantly (Howard and Howard, 1990;Sutherland, 1998).…”

Section: Introductionmentioning

confidence: 99%

Comparison of loss on ignition and thermal analysis stepwise methods for determination of sedimentary organic matter

Frangipane

Pistolato

Molinaroli

et al. 2008

Aquatic Conservation

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ABSTRACT1. Loss on ignition (LOI) is a widely used method to estimate organic matter (OM) in the sediment of marine and freshwater ecosystems. Thermogravimetric-differential thermal analysis (TG-DTA) of organic species provides information on thermal reactions, the amount and properties of clay structural water, organic species and carbonates.2. The accuracy of LOI compared with that of TG-DTA was evaluated in 33 sediment samples from the Lagoon of Venice (Italy).3. In all tests conducted with TG-DTA the mass loss of OM and the loss of clay structural water (LCSW) from oxidized samples were measured. The mass loss of OM at 3508C (TG-DTA 350 OM) and the total extraction of organic matter at 5678C (TEOM) calculated from the difference between natural state samples and oxidized samples highlight the presence of both thermally labile and thermally stable substances.4. The grain size data of sediment samples from the Lagoon shows a variable distribution between slightly muddy sand and mud. Loss of clay structural water at 3508C (LCSW 350) and total extraction of clay structural water at 5678C (TECSW) both estimated by TG-DTA on oxidized samples, were found to correspond approximately to 6% and 10%, respectively of the clay fraction (54 mm). This percentage may be used to correct LOI measurements of OM in sediments with high clay content.5. LOI 350 (loss on ignition at 3508C) and LOI 550 (loss on ignition at 5508C) proved to be $80% and $200%, respectively, of total extraction of mass loss at 3508C (TG-DTA 350 tot) and at 5678C (TEML) estimated by TG-DTA on natural samples, meaning that the LOI 550 value represents a significant overestimate. The difference between the LOI 550 and TEML values indicates that the mass loss excess (MLE) may be accounted for by losses due to breakdown of carbonates.

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The influence of sample size and heating time on soil weight loss‐on‐ignition

Cited by 107 publications

References 9 publications

Recycling of complexometric extractants to remediate a soil contaminated with heavy metals

Recycling of complexometric extractants to remediate a soil contaminated with heavy metals

Effects of disturbance and ecosystem on decomposition

Comparison of loss on ignition and thermal analysis stepwise methods for determination of sedimentary organic matter

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