Results 21 to 30 of about 109,469 (312)

Pollution characteristics and ecological risk assessment of heavy metals in the surface sediments from a source water reservoir

Chemical Speciation & Bioavailability, 2016
Surface sediment samples were collected from a source water reservoir in Zhejiang Province, East of China to investigate pollution characteristics and potential ecological risk of heavy metals.
Changming Yang, Yaqiong Wu, Fen Zhang, Lin Liu, Ruijie Pan   +4 more
doaj   +1 more source

Thermal-chemical Fractionation of Lignocellulosic Biomass

EUBCE 2019 Conference Proceedings, 2019
Biomass is a valuable, sustainable feedstock for the production of chemicals and materials, and will play an important role in the transition towards a Sustainable Process Industry. Bio-based products – products wholly or partly derived from materials of biological origin – can make the society more sustainable and lower its dependence on fossil fuels.
Heeres, Hans, Leijenhorst, Evert, Ongena, Remco, Van de Beld, Bert   +3 more
openaire   +3 more sources

Simultaneous fractionation of sulfur dioxide explains mass independent fractionation of sulfur isotopes in Archean sedimentary pyrites

, 2021
The relationship between ∆36S and ∆33S in Archean sedimentary pyrites has been used to evaluate early geologic processes, including photochemical reactions in the anoxic atmosphere, biological activity and thermochemical alteration during sediment ...
Chen, M, Campbell, IH, Huang, Z, Sambridge, M, Avila, JN   +4 more
core   +1 more source

The provenance of selected heavy metals in soils near power plant of Hamedan: A pedological approach

مجله آب و خاک, 2014
To determine the origin of heavy metals, the effects of parent materials, soil genesis, and human activities on the content and distribution of selected metals in soils near Mofateh Martyr powerhouse, Hamedan, were assessed.
Sh. Nosratipoor, M. Nael, M. Sheklabadi, A.A. Sepahi Garo   +3 more
doaj   +1 more source

Chemical Fractionation of Trace Elements in Arctic PM₁₀ Samples

Atmosphere, 2021
In this study, the information potential of a two-step sequential extraction procedure was evaluated. For this purpose, first of all the elemental composition of Arctic PM10 samples collected in Ny-Ålesund (Svalbard Islands) from 28 February 2015 to 21 ...
Eleonora Conca, Mery Malandrino, Agnese Giacomino, Paolo Inaudi, Annapaola Giordano, Francisco Ardini, Rita Traversi, Ornella Abollino   +7 more
doaj   +1 more source

Phosphorus concentrations in sediments from the equatorial Amazon estuary, Furo of Muriá, Pará State, Brazil

Acta Scientiarum: Technology, 2022
We characterized the spatial and seasonal distributions of different phosphorus fractions in surface sediments from the Furo of Muriá estuary by chemical fractionation.
Ana Carolina Santa Rosa de Sousa, Rosa Maria da Luz Mendes, Francianne Vieira Mourão, Maamar El Robrini, José Almir Rodrigues Pereira, Pedro Henrique Campos Sousa, Maria Lourdes de Souza Santos   +6 more
doaj   +1 more source

How well does ramped thermal oxidation quantify the age distribution of soil carbon? Assessing thermal stability of physically and chemically fractionated soil organic matter [PDF]

Biogeosciences, 2023
Carbon (C) in soils persists on a range of timescales depending on physical, chemical, and biological processes that interact with soil organic matter (SOM) and affect its rate of decomposition.
S. W. Stoner, S. W. Stoner, M. Schrumpf, A. Hoyt, C. A. Sierra, C. A. Sierra, S. Doetterl, V. Galy, S. Trumbore   +8 more
doaj   +1 more source

Bioavailability of Cu and Zn in raw and anaerobically digested pig slurry [PDF]

, 2009
The impact of anaerobic digestion on the bioavailability of copper and zinc from pig slurry was assessed. Both chemical and biological approaches were used independently on raw slurry (RS) and anaerobically digested pig slurry (DS).
Marcato, Claire-Emmanuelle, Pinelli, Eric, Winterton, Peter, Cecchi, Marie, Guiresse, Agnès Maritchù   +4 more
core   +1 more source

Origin and fate of copper in a small Mediterranean vineyard catchment: New insights from combined chemical extraction and δ65Cu isotopic composition [PDF]

, 2013
For centuries, many Mediterranean catchments were covered with vineyards in which copper was widely applied to protect grapevines against fungus. In the Mediterranean-type flow regime, brief and intense flood events increase the stream water discharge by
Probst, Jean-Luc, Aubert, Dominique, Probst, Anne, El Azzi, Désirée, Viers, Jérôme, Guiresse, Agnès Maritchù, Caparros, Jocelyne, Guizien, Katell, Charles, François, Guiresse, Maritxu   +9 more
core   +1 more source

Seasonal variations in the concentration and solubility of elements in atmospheric particulate matter: a case study in Northern Italy

E3S Web of Conferences, 2013
Atmospheric particulate matter is characterized by a variety of chemical components, generally produced by different sources. Chemical fractionation of elements, namely the determination of their extractable and residual fractions, may reliably increase ...
Canepari S., Astolfi M. L., Marcovecchio F., Maretto M., Perrino C.   +4 more
doaj   +1 more source