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Journal articles on the topic 'Heavy fraction organic matter'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

MF, Qayyum, D. Steffens, Reisenauer HP, and S. Schubert. "Biochars influence differential distribution and chemical composition of soil organic matter." Plant, Soil and Environment 60, No. 8 (2014): 337–43. http://dx.doi.org/10.17221/768/2013-pse.

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In the present study, three soils (Ferralsol, Luvisol topsoil, and Luvisol subsoil) were amended with biochars (charcoal, hydrothermal carbonization coal (HTC) of bark, and low-temperature conversion coal of sewage sludge), wheat straw and a control (no amendment) and incubated over a period of 365 days. Each amendment was applied at a rate of 11.29 g C/kg soil. After incubation, the soils were analyzed to retrieve three density fractions (free fraction (FF), intra-aggregate fraction (IAF), and heavy fraction) which were analyzed for total carbon (TC) contents and scanned by fourier transform

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2

Das, Pallavi, Kali Prasad Sarma, and Manish Kumar. "Understanding of Chemical Speciation of Lead, Zinc and Copper in Vertical Profile of the Sediments of the Brahmaputra River, Assam, India." Asian Journal of Water, Environment and Pollution 12, no. 1 (2015): 21–28. http://dx.doi.org/10.3233/ajw-2015-12_1_04.

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Lead (Pb), zinc (Zn) and copper (Cu) are ubiquitous in the environment as a result of anthropogenic and geogenic processes. The fate of these metals in the environment is largely governed by their speciation, which is influenced by sediment properties. Therefore present study focusses on the distribution of Pb, Zn and Cu in different chemical forms in core sediments. Four sediment cores were collected from upstream to downstream of the Brahmaputra river. Metal speciation study revealed that most of the heavy metals were associated with the residual fraction. Among non-residual fraction Zn and

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3

Staszel, Karolina, Jarosław Lasota, and Ewa Błońska. "Soil Organic Matter Fractions in Relation to Root Characteristics of Different Tree Species in Altitude Gradient of Temperate Forest in Carpathian Mountains." Forests 13, no. 10 (2022): 1656. http://dx.doi.org/10.3390/f13101656.

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The roots are a key functional component of belowground systems and one of the main factors influencing the quality and quantity of soil organic matter. Our research aimed to determine the fractional composition of the soil organic matter (SOM) in soils under various tree species on an altitude gradient. In our research, we related the SOM fractions with the root characteristics. There is a lack of information on the relationship between the SOM fractions and the root properties. We assessed labile and heavy fractions of SOM content in forest mountain soils with a climosequence approach. The s

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4

Al-Hamdani, Jawdat Abdul Jalil, Salih Muhammad Awadh, and Ommer Sabah Ibrahim. "GEOCHEMICAL PARTITIONING OF HEAVY METALS IN THE URBAN SOIL, KIRKUK, IRAQ." Iraqi Geological Journal 39-49, no. 1 (2016): 1–24. http://dx.doi.org/10.46717/igj.39-49.1.1ms-2016-06-23.

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This work focused on anthropogenic influences of the trace metals distribution in the soils of Kirkuk city. Sequential extraction technique was used to determine the distribution of the chemical fractions of Ag, Cd, Co, Cu, Ni, Pb, Zn, As, Cr and V in soil of Kirkuk city. This area is affected mainly by burning oil trash. Results show that these heavy metals were primarily restricted to surface horizons and mostly associated with the residual fraction (28.8 – 50%). The remnant fractions (13.8 – 33.1%) linked to the organic matter, 7.9 – 27.2% was bound to Fe-Mn oxide, 0.7 – 27.9 was bound to c

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Barančíková, G., and J. Makovníková. "The influence of humic acid quality on the sorption and mobility of heavy metals." Plant, Soil and Environment 49, No. 12 (2011): 565–71. http://dx.doi.org/10.17221/4195-pse.

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Mobile and potentially mobile forms of heavy metals are probably one of the most important toxic hazards in the environment. Besides pH, which is a&nbsp;factor influencing the mobility/availability of heavy metals to the greatest extent, the content and mainly the quality of soil organic matter play a&nbsp;very important role in the evaluation of heavy metal behaviour in the environment. The fraction of metals bound to organic compounds is exclusively associated with humic substances and particularly with humic acids (HA). A&nbsp;relationship between the parameters reflecting the a

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6

LEŠTAN, Domen, and Helena GRČMAN. "Speciation of lead, zinc and cadmium in contaminated soils from Mežica valley." Acta agriculturae Slovenica 77, no. 2 (2001): 205–14. http://dx.doi.org/10.14720/aas.2001.77.2.15714.

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A knowledge of the total amount of heavy metals in soil is not enough to assess the environmental impact and decide on suitability of polluted soils for agronomic use. Six-step sequential extraction procedure was used to determine the distribution of Pb, Zn and Cd among various fractions of soils from six locations in Mežica valley. Phyto-available heavy metals: water soluble heavy metal species and fraction exchangeable from colloids to soil solution, accounted in average for 0.23-1.14% of Pb, 0.36-3.88% of Zn and 0-8.2% of Cd. The majority of heavy metal species was found to reside in non ph

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7

N'dayegamiye, A., and D. A. Angers. "Organic matter characteristics and water-stable aggregation of a sandy loam soil after 9 years of wood-residue applications." Canadian Journal of Soil Science 73, no. 1 (1993): 115–22. http://dx.doi.org/10.4141/cjss93-011.

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The long-term effects of wood-residue applications on soil properties are not well documented. This study was undertaken to characterize the organic matter and aggregation of a sandy loam after 9 yr of biennial application of wood residues (tree clippings) at rates of 25, 50 and 100 Mg ha−1 with and without nitrogen fertilization. Carbon (C) and nitrogen (N) contents of the whole soil were determined as well as the C content of the density fractions and of the fractions soluble and insoluble to Na4P2O7. In comparison with the control, the whole-soil C content was 16–24% higher following applic

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8

Parvin, Afsana, Mohammad Moniruzzaman, Md Kamal Hossain, et al. "Chemical Speciation and Potential Mobility of Heavy Metals in Organic Matter Amended Soil." Applied and Environmental Soil Science 2022 (July 5, 2022): 1–13. http://dx.doi.org/10.1155/2022/2028860.

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Organic matter (OM) degradation from amendments used in the remediation of metal-contaminated soils leads to modifications in soil chemical properties immediately after addition, which can also affect the soil metal distribution. Therefore, the speciation and potential mobility of heavy metals e.g., lead (Pb) and cadmium (Cd) were evaluated in three soils amended with OM. Soils, both spiked (with lead nitrate and cadmium nitrate solution) and unspiked, were treated with OM at a rate of 5 tons/ha in a moist condition. The samples were in incubation for 30 days in 30% moist condition. A chemical

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9

PRADO, MARCELO RIBEIRO VILELA, FABRICIO TOMAZ RAMOS, OSCARLINA LÚCIA DOS SANTOS WEBER, and CAIO BATISTA MÜLLER. "ORGANIC CARBON AND TOTAL NITROGEN IN THE DENSIMETRIC FRACTIONS OF ORGANIC MATTER UNDER DIFFERENT SOIL MANAGEMENT." Revista Caatinga 29, no. 2 (2016): 263–73. http://dx.doi.org/10.1590/1983-21252016v29n201rc.

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ABSTRACT: The evaluation of land use and management by the measurement of soil organic matter and its fractions has gained attention since it helps in the understanding of the dynamics of their contribution to soil productivity, especially in tropical environments. This study was conducted in the municipality of Colorado do Oeste, state of Rondônia, Brazil and its aim was to determinethe quantity of organic carbon and total nitrogen in the light and heavy fractions of organic matter in the surface layers of a typic hapludalf under different land use systems: Native Forest: open evergreen fores

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10

Dalal, RC, and RJ Mayer. "Long term trends in fertility of soils under continuous cultivation and cereal cropping in southern Queensland .VI. Loss of total nitrogen from different particle size and density fractions." Soil Research 25, no. 1 (1987): 83. http://dx.doi.org/10.1071/sr9870083.

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The dynamics of total N in particle-size and density fractions of six major soils which have been used for cereal cropping for 20-70 years were studied in order to identify the labile organic matter fractions in soil. For virgin soils, no single particle-size was consistently enriched in N as compared with the whole soil. The clay fraction contained the largest proportion (53% overall) of total N. Silt-size and sand-size N fractions accounted for 26% and 21% of total N, respectively. Upon cultivation, the sand-size fraction lost most of its N (as much as 89% in Langlands-Logie soil). However,

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Römkens, Paul F. A. M., Jan Hassink, and Johannes Van der Plicht. "Soil Organic 14C Dynamics: Effects of Pasture Installation on Arable Land." Radiocarbon 40, no. 2 (1997): 1023–31. http://dx.doi.org/10.1017/s0033822200018993.

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In a study addressing composition and recovery of soil carbon following pasture installation on arable land, radiocarbon isotope ratios were measured in size- and density-separated soil organic matter (SOM) fractions in a pasture and maize plot. The average soil carbon age increased with depth from 444 yr in the 0–30-cm layer to 2456 yr in the 60–80-cm layer in the pasture soils, and from 42 to 1625 yr in the maize-cultivated soil. Weight fractionation of the macro-organic matter (size >150 μm) in a light (density <1.17 g cm-3) intermediate (1.17 g cm-3 < density < 1.37 g cm-3), an

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12

Deely, J. "The Impact of Christchurch City (New Zealand) on Heavy Metals in Sediments of the Avon-Heathcote Estuary." Water Science and Technology 28, no. 8-9 (1993): 369–82. http://dx.doi.org/10.2166/wst.1993.0635.

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This paper reviews heavy metal (Cr, Cu, Fe, Mn, Ni, Pb, Zn) content in the clay fraction (&lt;4 µm) of soils, suspended sediment, surface sediment, and core sediment associated with the Avon-Heathcote Estuary. Despite the estuary's low clay content (&lt;10%), significant metal and organic matter trends are apparent in the clay fraction, which are less obvious in parallel studies of silt (4-63 µm), sand (&gt;63 µm), and total sediment. Clay fraction depth profiles record periods of high heavy metal input in sediments deposited slowly but not in sediments deposited rapidly. Most meta

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13

Kopecký, Marek, Ladislav Kolář, Radka Váchalová, et al. "Black Carbon and Its Effect on Carbon Sequestration in Soil." Agronomy 11, no. 11 (2021): 2261. http://dx.doi.org/10.3390/agronomy11112261.

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The properties of black carbon (BC) are described very differently in the literature, even when determined by the same methodological procedure. To clarify this discrepancy, BC was investigated in the clay Cambisols of southern Bohemia, Czech Republic, in groups of soils with lower and higher deposition of its atmospheric fallout. The BC determination was performed according to a modified method of Kuhlbusch and Crutzen (1995). The amount of the free light fraction, the occluded light fraction of soil organic matter and its ratio, the amount of heavy soil fraction DF, and its soil organic matt

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14

Akinde, Bamikole Peter, Durodoluwa Joseph Oyedele, Fatai Oladapo Tijani, and Rotimi George Ibitoye. "Soil organic matter fractions under different agricultural land-use in Ile-Ife, Nigeria." Tropical Agriculture 97, no. 3 (2020): 149–63. https://doi.org/10.5281/zenodo.4706970.

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The study investigated the impact of long-term agricultural land-use on the distribution of density and particulate fractions of soil organic matter and examined the potential of soil aggregate size fractions to stabilize soil organic matter. Soil samples were collected at 0-15 and 15-30 cm soil depths from paddock, undisturbed secondary forest, continuously cropped land, teak, oil palm, and cacao plantations at the Teaching and Research Farm, Obafemi Awolowo University, Nigeria. The soil samples were air-dried, and segregated into three different aggregate-size classes (0.063-0.25, 0.25-1 and

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15

Antilén, Mónica, Nadia Araya, Margarita Briceno, and Mauricio Escudey. "Changes on chemical fractions of heavy metals in Chilean soils amended with sewage sludge affected by a thermal impact." Soil Research 44, no. 6 (2006): 619. http://dx.doi.org/10.1071/sr06063.

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Forest fires are frequent in central-southern Chile; high temperatures may affect chemical fractions of heavy metals (Cu, Zn, Ni, Pb, Cd, Mo, Cr, and Mn) naturally present in soils and those coming from sewage sludge amendment. Changes in exchangeable, sorbed, organic, carbonate, and residual heavy metals fractions, evaluated by sequential extraction, were observed after heating at 400°C in 2 amended volcanic soils. Most significant heavy metals in these samples were Cu, Zn, Pb, and Ni. A significant increment in the total content of organic matter and metal ions, such as Zn and Cu, was observ

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16

Fitroh, Indah Syahiddah, Petrus Subardjo, and Lilik Maslukah. "Hubungan Logam Berat Pb terhadap Fraksi Sedimen dan Bahan Organik di Muara Sungai Tiram, Marunda, Jakarta Utara." Buletin Oseanografi Marina 8, no. 2 (2019): 61. http://dx.doi.org/10.14710/buloma.v8i1.25209.

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Kegiatan industri di Perairan Muara Sungai Tiram, Marunda, Jakarta Utara, akan berdampak terhadap konsentrasi logam berat di Perairan. Sedimen merupakan tempat akumulasinya logam tersebut dan pada suatu saat akan dapat menjadi sumber bagi kolom perairan diatasnya. Tujuan penelitian ini adalah untuk mengetahui konsentrasi logam berat pada sedimen dasar dan mengetahui korelasinya terhadap ukuran butir serta dan bahan organik. Analisa logam berat diawali dengan proses destruksi menggunakan aquaregia dan supernatannya di baca nilai absorbasninya menggunakan Atomic Absorption Spectrophotometer (AAS

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17

Ibragimow, Aleksandra, Barbara Walna, and Marcin Siepak. "Physico-Chemical Parameters Determining the Variability of Actually and Potentially Available Fractions of Heavy Metals in Fluvial Sediments of the Middle Odra River." Archives of Environmental Protection 39, no. 2 (2013): 3–16. http://dx.doi.org/10.2478/aep-2013-0012.

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Abstract The occurrence of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn) has been determined in the fluvial sediment samples collected along three transects in the Middle Odra River (western Poland) with a width of 360 m. The total concentrations of the metals were obtained after HNO3 microwave digestion and the available fractions of heavy metals were determined by single extraction procedures using two extractants: 0.01M CaCl2 and 0.05M EDTA. The measurement of physico-chemical parameters was also performed. The determination of total and available fractions of heavy metals, except potential availab

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18

Zhao, Shengnan, Yunxi Zhao, Zhimou Cui, Hui Zhang, and Jinda Zhang. "Effect of pH, Temperature, and Salinity Levels on Heavy Metal Fraction in Lake Sediments." Toxics 12, no. 7 (2024): 494. http://dx.doi.org/10.3390/toxics12070494.

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Heavy metals (HMs) in aquatic environments are characterized by high toxicity, a propensity for bioaccumulation, and non-degradability, and pose significant risks to biological communities. Previous studies of HMs in lakes have shown that the physical and chemical characteristics of the lake water may control both the migration of HMs in the sediments and the concentration of heavy metals in the lake water. In fact, the change in aquatic environments changes the heavy metal fraction in the sediment, which controls the release of HMs. In this paper, we investigated the effects of the pH, temper

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19

Charles Paré, Maxime, and Angela Bedard-Haughn. "Optimum liquid density in separation of the physically uncomplexed organic matter in Arctic soils." Canadian Journal of Soil Science 91, no. 1 (2011): 65–68. http://dx.doi.org/10.4141/cjss10051.

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Paré, M. C. and Bedard-Haughn, A. 2011. Optimum liquid density in separation of the physically uncomplexed organic matter in Arctic soils. Can. J. Soil Sci. 91: 65–68. Using an appropriate density to separate the soil light fraction (LF) and heavy fraction (HF) is an important aspect of the density fractionation technique. The effect of liquid density when separating the physically uncomplexed Arctic soil organic matter (SOM) was tested on three Arctic sites: High-Arctic, Low-Arctic, and Sub-Arctic. Our results showed that selecting the right density to use for Arctic soils is not unequivocal.

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20

Aoyama, Masakazu. "DRIFT spectroscopy combined with sodium hypochlorite oxidation reveals different organic matter characteristics in density-size fractions of organically managed soils." Canadian Journal of Soil Science 96, no. 3 (2016): 317–27. http://dx.doi.org/10.1139/cjss-2015-0076.

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The objective of this study was to characterize the organic matter (OM) in density-size fractions of soil samples from a commercial organic farm using diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The soil samples were separated by density fractionation with a sodium iodide (Nal) solution (1.6 g cm–3) into free particulate OM (fPOM), occluded particulate OM (oPOM), heavy particulate OM (hPOM), and mineral-associated OM (MAOM) fractions. The OM characterization by DRIFT spectroscopy was the difference in spectra obtained before and after sodium hypochlorite (NaClO) oxidat

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Ferreira, Guilherme Wilbert, Samya Uchoa Bordallo, Edenilson Meyer, et al. "Heavy Metal-Based Fungicides Alter the Chemical Fractions of Cu, Zn, and Mn in Vineyards in Southern Brazil." Agronomy 14, no. 5 (2024): 969. http://dx.doi.org/10.3390/agronomy14050969.

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This study aimed to evaluate Cu, Zn, and Mn fractions in vineyard soils in two important wine-growing regions in Latin America, which have soils with different soil organic matter (SOM) and clay contents. Soils were collected from vineyards aged 35, 37, and 39 years (Serra Gaúcha) and 13, 19, and 36 years (Campanha Gaúcha). In each region, soils were collected from a non-anthropized area, and in the oldest vineyards, the collection was conducted on and between the planting lines. The available and total Cu, Zn, and Mn contents were analyzed in addition to the chemical fractions. The ΔCu, ΔZn,

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Melo, Évio Eduardo Chaves de, Clístenes Williams Araújo do Nascimento, Adriana Maria de Aguiar Accioly, and Ana Cristiane Queiroz Santos. "Phytoextraction and fractionation of heavy metals in soil after multiple applications of natural chelants." Scientia Agricola 65, no. 1 (2008): 61–68. http://dx.doi.org/10.1590/s0103-90162008000100009.

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Chelate-assisted phytoextraction of heavy metals is a promising approach to clean up polluted soils. However, the most successful chelants tested so far are synthetic agents that barely degrade in soil, increasing the metal leaching risks. Natural organic acids have been proposed to enhance phytoextraction due to their higher biodegradability, but they can also be a drawback for efficient phytoextraction. This work was carried out to compare the effectiveness of multiple applications of citric and gallic acids on the availability in soil and accumulation of Cd, Pb, Cu, and Zn by velvet bean (S

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23

Sun, C. Y., J. S. Liu, Y. Wang, N. Zheng, X. Q. Wu, and Q. Liu. "Effect of long-term cultivation on soil organic carbon fractions and metal distribution in humic and fulvic acid in black soil, Northeast China." Soil Research 50, no. 7 (2012): 562. http://dx.doi.org/10.1071/sr12100.

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Cultivation affects soil organic matter and its fractions. Fulvic acid (FA) and humic acid (HA) make up an important part of soil organic matter, and their binding capacity influences heavy metal behaviour in soil. This research studied changes in soil organic components and the distribution of copper (Cu), lead (Pb), and zinc (Zn) in HA and FA affected by long-term cultivation in black soils. Uncultivated sites and their adjacent cultivated sites (18, 50, and >200 years) were selected. Alkaline sodium hydroxide/pyrophosphate extraction of humic substances and precipitation of HA by acidifi

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He, Q., Y. Ren, I. Mohamed, M. Ali, W. Hassan, and F. Zeng. "Assessment of trace and heavy metal distribution by four sequential extraction procedures in a contaminated soil." Soil and Water Research 8, No. 2 (2013): 71–76. http://dx.doi.org/10.17221/20/2012-swr.

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Four sequential extraction procedures (Sposito, Tessier, Silveira and Bureau Communautaire de Reference (BCR)) were used to evaluate the distribution of some metals (Fe, Cu, Cd and Zn) in a contaminated soil around a mining area. The results showed that Fe and Zn were mainly recovered in the recalcitrant soil fractions, while Cd was primarily localized in the exchangeable fraction. Soil Cu was highly associated with organic matter fraction. The amorphous Fe fraction in Silveira could be recognized as part of the Fe-Mn oxide fraction in Tessier and BCR procedures, while the crystalline Fe oxide

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Yu, K. C., C. Y. Chang, L. J. Tsai, and S. T. Ho. "Multivariate analyses on heavy metal binding fractions of river sediments in Southern Taiwan." Water Science and Technology 42, no. 7-8 (2000): 193–99. http://dx.doi.org/10.2166/wst.2000.0569.

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This study depicts the amounts of heavy metals (Cu, Zn, Pb, Cr, Co, and Ni) bound to four geochemical compositions of sediments (carbonates, Mn oxides, Fe oxides, and organic matters), and the correlations between various geochemical compositions and their heavy-metal complexes. Hundreds of data, obtained from sediments of five main rivers (located in southern Taiwan), were analyzed by using multivariate analysis method. Among the four different geochemical compositions, the total amount of the six heavy metals bound to organic matter is the highest. Zn is easily bound to various geochemical c

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Yuan, Hao Ran, Xiao Bo Wang, Dan Dan Zhao, et al. "Experimental Study on Influence of Fly Ash in Melting Process on Heavy Metal Speciation." Advanced Materials Research 347-353 (October 2011): 142–46. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.142.

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The influence of melting process on heavy metal speciation was studied. The results show that although there are different changes of heavy metals Cd, Cu, Mn and Zn after melting process, percentage of residue is increasing and others are decreasing. Before melting process, Pb exists mainly in carbonate, Fe-Mn oxide and organic matter bound fractions and in Fe-Mn oxide bound fraction after the process. The percentage distribution of Cr, As, Ba and Ni are not changed obviously before and after melting. In general, the existence forms of all testing heavy metals trend to more stable speciation a

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Roscoe, R., P. Buurman, B. van Lagen, and E. Velthorst. "Transformations in occluded light fraction organic matter in a clayey oxisol: evidence from 13C-CPMAS-NMR and delta13C Signature." Revista Brasileira de Ciência do Solo 28, no. 5 (2004): 811–18. http://dx.doi.org/10.1590/s0100-06832004000500003.

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We hypothesised that, during occlusion inside granular aggregates of oxide-rich soils, the light fraction organic matter would undergo a strong process of decomposition, either due to the slow process of aggregate formation and stabilisation or due to digestion in the macro- and meso-fauna guts. This process would favour the accumulation of recalcitrant materials inside aggregates. The aim of this study was to compare the dynamics and the chemical composition of free and occluded light fraction organic matter in a natural cerrado vegetation (woodland savannah) and a nearby pasture (Brachiaria

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Zajusz-Zubek, Elwira, and Jan Konieczyński. "Coal Cleaning Versus the Reduction of Mercury and other Trace Elements’ Emissions from Coal Combustion Processes." Archives of Environmental Protection 40, no. 1 (2014): 115–27. http://dx.doi.org/10.2478/aep-2014-0012.

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Abstract Samples of steam coal used in heat and power plants as well as densimetric fractions obtained on a laboratory scale by dense organic liquid separation have been examined. The contents of ash, mercury, chromium, cadmium, copper, nickel and lead have been determined in coal, in the light and medium fraction as well as in the refuse. The degree of removal of mineral matter and the examined heavy metals as well as the coal combustible parts yield have been determined. Examination of 5 coals revealed that it is possible to remove 41% of mercury and more than 35% of other heavy metals bound

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Tu, Haoran, Jinlong Gao, Di Su, et al. "Differential Adsorption Behaviors of Light and Heavy SPM Fractions on Three Antibiotics: Implications for Lacustrine Antibiotic Migration." Water 17, no. 13 (2025): 1859. https://doi.org/10.3390/w17131859.

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Lakes are important sinks for antibiotics as suspended particulate matters (SPMs) in lakes have become significant carriers of antibiotic adsorption and migration. The light and heavy fractions of SPM are involved in the process of suspension and sedimentation in the aqueous environment. Combined with the adsorption behaviors of antibiotics onto SPM, a basis for the risk of antibiotic migration in lakes will be provided. In this study, SPM from Lake Taihu was collected and grouped according to density as light fraction (LF) and heavy fraction (HF), with heavy fraction including loosely bound h

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Oliver, I. W., G. Merrington, and M. J. McLaughlin. "Copper Partitioning Among Mineral and Organic Fractions in Biosolids." Environmental Chemistry 3, no. 1 (2006): 48. http://dx.doi.org/10.1071/en05066.

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Environmental Context.Only a portion of the total amount of heavy metals present in sewage biosolids is accessible to organisms, including plants, and therefore only that portion presents any possible toxicity threat. However, metals such as copper, which are commonly associated to a large degree with the organic fraction, may become more accessible over time as organic components degrade. Determining the extent of partitioning of Cu between the organic and inorganic fractions may provide an indication of any long-term risks associated with utilisation of biosolids in agriculture. Abstract.Met

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Sharp, E. L., S. A. Parsons, and B. Jefferson. "The effects of changing NOM composition and characteristics on coagulation performance, optimisation and control." Water Supply 4, no. 4 (2004): 95–102. http://dx.doi.org/10.2166/ws.2004.0066.

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A number of water utilities have been experiencing operational difficulties during specific times of the year, associated with elevated levels of organics due to heavy rainfall or snow melt. Water samples were collected from Albert treatment works (Halifax, UK) and the natural organic matter (NOM) was characterised using XAD resin adsorption techniques. The addition of a cationic polyelectrolyte was employed to determine the charge density of the fractions. Results show that NOM fraction make-up changes throughout the year, with the fulvic acid fraction (FAF) showing the greatest increase duri

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Milczarek, M., E. Neczaj, and K. Parkitna. "Co-composting as an oxygen stabilization of an organic fraction of municipal solid waste and industrial sewage sludge." Water Science and Technology 68, no. 8 (2013): 1697–706. http://dx.doi.org/10.2166/wst.2013.402.

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The purpose of this work is to study the characteristics of the co-composting of municipal solid waste (MSW), sewage sludge, grass and sawdust. Differing proportions of biodegradable waste were investigated through changes of temperature, oxygen consumption, organic matters, moisture content, carbon, nitrogen, C/N ratio as well as heavy metals and pathogen microorganisms content. The present study has shown that addition of MSW above 10% had a negative impact on the composting process. The initial C/N of the mixtures with a higher MSW content was below 18. Lower losses of organic matter occurr

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Shirke, Krushnath, and N. J. Pawar. "Appraisal of Heavy Metals in Soil/Sediments with Relation to their Physico-chemical Properties from Ankaleshwar Industrial Area, South Gujarat." Journal of Geographical Studies 2, no. 1 (2018): 1–11. http://dx.doi.org/10.21523/gcj5.18020101.

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Extensive industrialization in the southern part of Gujarat is characterized by regional pollution of soil and water resources. In view of this, the present study has been undertaken in Ankaleshwar, one of the biggest industrial townships of India. About, 25 surface sediment /soil samples were collected from top 10 cm representing entire study area and were analyzed for heavy metals by using X-ray fluorescence spectrometer (XRF). The heavy metals concentrations were compared with the standard shale to find out pollution index (PI), results shows the significant enrichment for arsenic, moderate

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Karlsson, I., and J. Göransson. "Thermic Sludge Treatment." Water Science and Technology 27, no. 5-6 (1993): 449–56. http://dx.doi.org/10.2166/wst.1993.0522.

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Chemical pretreatment changes the composition of waste water by reducing the paniculate organic matter. A lower biological sludge production from the sewage facilitates nitrification. The denitrification capacity of the sewage is decreased, but the fraction of low molecular substances is not influenced by the chemical treatment. To increase the denitrification capacity, the organic matter removed can be hydrolised into a readily degradable form and used as an electron donor. In Tampere waste water plant the sludge is hydrolysed at 150° C in a low pH environment. The carbon source was increasin

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Flanagan, M. S., R. E. Schmidt, and R. B. Reneau. "Municipal Solid Waste Heavy Fraction for Production of Turfgrass Sod." HortScience 28, no. 9 (1993): 914–16. http://dx.doi.org/10.21273/hortsci.28.9.914.

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The “heavy fraction” portion of a municipal solid waste separation process was evaluated in field experiments as a soil amendment for producing turfgrass sod. Soil organic matter and concentrations of extractable NO3-N, P, K, Ca, and Zn in the soil increased with addition of heavy fraction. Soil incorporation of heavy fraction resulted in greater air, water, and total porosity and lower bulk density of a loamy sandy soil. .Sod strength measurements taken 8.5 and 9.5 months after seeding were higher for Kentucky bluegrass (Poaprutensis L.) grown in heavy-fraction-amended topsoil than for turf g

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Liu, Guannan, Zhanqiu Yu, Xinhui Liu, Wei Xue, Liming Dong, and Yongbing Liu. "Aging Process of Cadmium, Copper, and Lead under Different Temperatures and Water Contents in Two Typical Soils of China." Journal of Chemistry 2020 (May 28, 2020): 1–10. http://dx.doi.org/10.1155/2020/2583819.

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Aging process of exogenous heavy metals in soil is significant for reducing their environmental risk due to the redistribution of species of soil heavy metals. A red soil (ultisol) and a brown soil (alfisol) were selected to investigate the aging process of cadmium (Cd), copper (Cu), and lead (Pb) under different regimes of temperature and water content. Most introduced heavy metals were all transformed from dissolved fraction to more stable fractions within 5 days of incubation. During incubation, most Pb existed in the fraction bound to Fe/Mn oxides, while exchangeable and carbonate-associat

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Uday, Sankar Banerjee, Guo Zhao-hui, Zhou Kang-gen, and Chai Li-yuan. "Chemical fractionation and distribution of metals in contaminated urban soil in Zhuzhou City, South Central China." Journal of Indian Chemical Society Vol. 93, Oct 2016 (2016): 1199–204. https://doi.org/10.5281/zenodo.5639358.

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Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China <em>E-mail </em>: banerjeesme@csu.edu.cn <em>Manuscript received online 20 April 2016, revised 23 August 2016, accepted 24 August 2016</em> The present study was conducted to determine the chemical fractions of heavy metals, to assess the current and potential environmental risks and to evaluate the mobility and bioavailability of metals in contaminated urban soils. Sequential extraction procedure was applied to fractionate the metal content into exchangeable fraction,

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Safari-Sinegani, A. A., and M. Safari-Sinegani. "Anthropogenic and Natural Influences on Soil Organic Carbon Fractions: A Case Study on Soils of Meyghan Lake in Arak, Iran." Journal of Applied Sciences and Environmental Management 26, no. 6 (2022): 1113–22. http://dx.doi.org/10.4314/jasem.v26i6.18.

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Monitoring and assessment of soil organic carbon (SOC) in the soils of arid areas are very important. The objectives of the study were to evaluate the responses of extractable and particulate organic matter in soils around Meyghan Lake in Arak (Iran) to surface water-inflows. Two layers (0-30 cm and 30-60 cm) of soils were sampled in the release sites of municipal wastewater and 3 rivers. Different fractions of SOC were measured and statistically analyzed. The soil sampled from the release sites of municipal wastewater had the highest total organic carbon (14.1 mg TOC g-1 topsoil) and free par

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Cardoso, José Alberto Ferreira, Augusto Miguel Nascimento Lima, Tony Jarbas Ferreira Cunha, et al. "ORGANIC MATTER FRACTIONS IN A QUARTZIPSAMMENT UNDER CULTIVATION OF IRRIGATED MANGO IN THE LOWER SÃO FRANCISCO VALLEY REGION, BRAZIL." Revista Brasileira de Ciência do Solo 39, no. 4 (2015): 1068–78. http://dx.doi.org/10.1590/01000683rbcs20140498.

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Improper land use has lead to deterioration and depletion of natural resources, as well as a significant decline in agricultural production, due to decreased soil quality. Removal of native vegetation to make way for agricultural crops, often managed inadequately, results in soil disruption, decreased nutrient availability, and decomposition of soil organic matter, making sustainable agricultural production unviable. Thus, the aim of the present study was to evaluate the impact of growing irrigated mango (over a 20 year period) on the organic carbon (OC) stocks and on the fractions of soil org

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Kołecka, Katarzyna, and Hanna Obarska-Pempkowiak. "Potential fertilizing properties of sewage sludge treated in the sludge treatment reed beds (STRB)." Water Science and Technology 68, no. 6 (2013): 1412–18. http://dx.doi.org/10.2166/wst.2013.393.

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In previous research the fertilizer value of sludge from reed beds was evaluated based on the sampling sludge on different depths from four Danish sludge treatment reed beds (STRB) after long periods of stabilization. The dewatering efficiency of sewage sludge in the STRB is comparable to mechanical dewatering. The long-term stabilization of sewage sludge progressively decreases the concentration of organic matter due to the process of humification. The aim of the work was to determine the changes of organic matter concentration, nutrients concentrations as well as speciation of selected heavy

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Wasay, S. A., W. J. Parker, and P. J. Van Geel. "Contamination of a calcareous soil by battery industry wastes. I. Characterization." Canadian Journal of Civil Engineering 28, no. 3 (2001): 341–48. http://dx.doi.org/10.1139/l00-119.

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A study of soil contamination due to the disposal of waste from a battery industry was conducted. The soil particle size, organic matter content, and buffering capacity were characterized. The heavy metal content of the soil was characterized with soil depth, soil particle size, and with respect to the fraction of the soil by which it was retained. Lead was found to be the dominant contaminant with all other metals present at considerably lower concentrations. Most of the lead was retained in the fraction of the soil that had a particle size less than 2 mm. This fraction represented 40.8% of t

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Jin, Xiaobin, Shenmin Wang, and Yinkang Zhou. "Dynamic of organic matter in the heavy fraction after abandonment of cultivated wetlands." Biology and Fertility of Soils 44, no. 7 (2008): 997–1001. http://dx.doi.org/10.1007/s00374-008-0310-6.

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Slukovskii, Zakhar, and Tatiana Shelekhova. "Geochemical Assessment of the Modern Sediments of a Lake in the North of Russia." Advances in Environmental and Engineering Research 04, no. 03 (2023): 1–16. http://dx.doi.org/10.21926/aeer.2303038.

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Core sediment (sapropel) samples were collected from Lake Okunozero, the Republic of Karelia, Russia, to assess the distribution of heavy metals and their main fractions, probable sources of pollution, and potential ecological and toxicological risks for the water body. Heavy metal concentrations were measured by the mass spectrometry method using an XSeries-2 ICP-MS. The sequential extraction of heavy metals from sapropel samples was performed using the scheme of Tessier. According to the Russian Interstate Standard (GOST), the sapropel of Lake Okunozero is suitable for use in agriculture. Th

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Kumar, Vinay, Pokhraj Sahu, and Markandeya. "Sequential extraction and risk assessment of pollutants from one major tributary of the Ganga." Water Supply 22, no. 3 (2021): 2767–81. http://dx.doi.org/10.2166/ws.2021.437.

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Abstract The geochemical fractionation of toxic heavy metals Cd, Pb, Cr, Co, Mn, Ni, Cu, Fe and Zn was investigated in 10 different sites of river bed sediments (up, mid and downstream) of Gomti River at Lucknow city. Sequential extraction technique was used to identify the distribution of trace elements binding in different fractions; i.e., exchangeable, carbonate, Fe and Mn oxide, organic matter and residual. Heavy metal concentrations were least at upstream and significantly higher in mid and downstream. Fractionation indicated that dominant metals were bound in residual fraction to the bed

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Rangel, Carlos M. A., José A. Baptista Neto, Estefan M. Fonseca, John McAlister, and Bernard J. Smith. "Study of heavy metal concentration and partitioning in the Estrela River: implications for the pollution in Guanabara Bay - SE Brazil." Anais da Academia Brasileira de Ciências 83, no. 3 (2011): 801–16. http://dx.doi.org/10.1590/s0001-37652011005000020.

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In this study, the geochemical analysis of ten sediment samples collected along the fluvial system of the Estrela River, which flows into the northern portion of Guanabara Bay, shows the presence of anthropogenic impacts in this area. Concentrations of Fe, Mn, Zn, Cu, Pb, Cr and Ni obtained were slightly higher, when compared with values found innatural environments. The particle size and organic matter content in most of the analyzed stations showed featuresnot conducive to the accumulation of pollutants due to the low organic matter content and the strong presence ofsand fraction. There was

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Shabayev, V. P., V. E. Ostroumov, I. O. Plekhanova, V. O. Kulikov, and M. P. Volokitin. "Fractional composition of nickel compounds in soil and its accumulation in plants in application of growth promoting rhizosphere bacteriaon heavy metal-contaminated soil." Rossiiskaia selskokhoziaistvennaia nauka, no. 2 (April 15, 2023): 68–71. http://dx.doi.org/10.31857/s250026272302014x.

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Impact of genus Pseudomonas bacteria on fractional composition of nickel compounds in artificially contaminated agro-gray soil and yield of spring wheat was studied in pot experiment. Plants were grown up to booting stage with NiCl2·6H2O contamination at a rate of 300 Ni/kg of soil against background of NPK fertilization. Distribution of nickel in soil fractions isolated by the method of successive selective extractions has been established. Nickel content in plants after combustion in mixture of HNO3:HClO4 (2:1)and in soil fractions was determined by inductively coupled plasma emission-optica

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Castanha, Cristina, Susan Trumbore, and Ronald Amundson. "Methods of Separating Soil Carbon Pools Affect the Chemistry and Turnover Time of Isolated Fractions." Radiocarbon 50, no. 1 (2008): 83–97. http://dx.doi.org/10.1017/s0033822200043381.

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A variety of physical and chemical techniques are used to fractionate soil organic matter, but detailed comparisons of the different approaches and tests of how separation methods influence the properties of isolated organic matter pools are lacking. In this case study based on A horizon samples of 2 California coniferous forests soils, we 1) evaluate the effects of root removal and ultrasonic dispersion on the properties of the <2 g cm-3 light fraction and 2) compare the properties of fractions obtained by sequential density separations of ultrasonically treated soil with those obtained by

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Hnaťuková, Petra. "Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflows." Journal of Hydrology and Hydromechanics 59, no. 2 (2011): 85–94. http://dx.doi.org/10.2478/v10098-011-0007-7.

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Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflowsThis study was undertaken to assess the impact of combined sewer overflows (CSOs) on distribution and potential mobility of heavy metals in sediments of urban streams in Prague, Czech Republic. Contents of total and extractable heavy metals (Cu, Zn, Pb, Cd, Cr and Ni), mineralogical phases and other sediment properties were measured in 44 surficial sediment samples. Total metal concentrations were obtained after microwave-assisted digestion whilst extractable metal contents w

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Branzini, Agustina, and Marta Susana Zubillaga. "Comparative Use of Soil Organic and Inorganic Amendments in Heavy Metals Stabilization." Applied and Environmental Soil Science 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/721032.

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Remediation strategies are capable to mitigate negative effects of heavy metals (HMs) on soils. The distribution of cooper (Cu), zinc (Zn), and chromium (Cr) was evaluated in a contaminated soil after adding biosolid compost (BC) and phosphate fertilizer (PF). A greenhouse assay and sequential extraction procedure were performed to determine the fractionation of HM in contaminated and remediated soil. In BC treatment, among 4 to 6% of Cu was associated with soil humic substances. Without amendments and with fertilizer application, Zn solubility increased by 15.4 and 8.4%, respectively, with ex

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Mani, Shanmugam, Agustín Merino, Felipe García-Oliva, Jean Riotte, and Raman Sukumar. "Soil properties and organic matter quality in relation to climate and vegetation in southern Indian tropical ecosystems." Soil Research 56, no. 1 (2018): 80. http://dx.doi.org/10.1071/sr16262.

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Soil organic matter (SOM) quantity and quality can be directly altered by climate, and SOM has been proposed as both a significant source and sink of carbon dioxide. To understand the factors that influence SOM, the present study focuses on the relationship between precipitation and soil physical and chemical properties along a rainfall–vegetation gradient in a seasonally dry tropical forest in the Western Ghats, southern India. Soil pH decreased with increasing rainfall, but soil organic carbon (SOC) and nitrogen (N) slightly increased. Rainfall had strong positive correlations with standing

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