Results 261 to 270 of about 6,179,886 (326)

Distribution, chemical fractionation, and potential environmental risks of Hg, Cr, Cd, Pb, and As in wastes from ultra-low emission coal-fired industrial boilers in China.

Journal of Hazardous Materials, 2022
This study conducted a comprehensive investigation of the distribution, chemical fractionation, and potential environmental risks of Hg, Cd, Cr, Pb, and As in waste based on new data from five ultra-low emission (ULE) coal-fired industrial boilers (CFIBs)
Yali Tong, Jiajia Gao, Tao Yue, Xiaoxi Zhang, Jieyu Liu, Jie Bai   +5 more
semanticscholar   +1 more source

Chemical fractionation and bioaccessibility of potentially toxic elements in area of artisanal gold mining in the Amazon.

Journal of Environmental Management, 2020
Artisanal mining may have modified the mobility, bioavailability and bioaccessibility of potentially toxic elements (PTEs) in the Serra Pelada gold mine, eastern Amazon, Brazil, which has not yet been studied.
W. V. Pereira, Renato Alves Teixeira, E. S. Souza, Adriele Laena Ferreira de Moraes, W. Campos, C. Amarante, G. C. Martins, A. Fernandes   +7 more
semanticscholar   +1 more source

Fractal-fractional Brusselator chemical reaction

Chaos, Solitons & Fractals, 2021
Abstract In this paper, we replace the classical differential operators with the fractal-fractional differential operators corresponding to the power law, exponential decay, and the generalized Mittag-Leffler kernels. These operators have two parameters created: the first is a fractal dimension and the second is a fractional order.
openaire   +1 more source

Isotopic fractionation – chemical v. environmental perspective

Environmental Chemistry, 2012
In recent years, we have witnessed an enormous increase in applications of quantitative isotopic measurements that have contributed to solving problems related to chemical pollution. Some fundamental concepts have been laid out in an excellent introduction on this developing technique.
Paneth, Piotr
openaire   +1 more source

Critical Aspects of Sedimentary Phosphorus Chemical Fractionation

Journal of Environmental Quality, 1994
AbstractSequential leaching procedures have been widely used as an environmental tool to quantify sedimentary P reservoirs. Nevertheless, they still present important issues that need to be investigated such as readsorption of leached ions and organic P hydrolysis.
Barbanti A, Bergamini M C, Frascari F, Miserocchi S, Rosso G   +4 more
openaire   +3 more sources

Understanding the solid phase chemical fractionation of uranium in soil profile near a hydrometallurgical factory.

Chemosphere, 2019
Uranium (U) contamination of soil has become a major concern with respect to its toxicity, accumulation in the food chain, and persistence in the environment.
Shengyu Yang, Xiaowen Zhang, Xiaoyan Wu, Mi Li, Lijiang Zhang, Ying Peng, Qianwen Huang, Wen-fa Tan   +7 more
semanticscholar   +1 more source

Chemical fractionation of uranium isotopes

Journal of Inorganic and Nuclear Chemistry, 1969
Abstract Precise measurements were made of the chemical fractionation of uranium-235 and uranium-238 between several forms of U(IV) and U(VI) salts. The observed separation factors were very much smaller than previously supposed. It is shown that the chemical exchange method of isotope separation is unlikely to be economically or technically useful.
A.C. Rutenberg, J.S. Drury
openaire   +1 more source

Chemical Fractionation of Phosphorus in Stabilized Biosolids

Journal of Environmental Quality, 2008
Three chemicals—ferrous sulfate (FeSul), calcium oxide (CaO), and aluminum sulfate (alum)—were applied at different rates to stabilize P in fresh, anaerobically digested biosolids (FBS) obtained from an activated sewage treatment plant. A modified Hedley fractionation procedure was used to assess P forms in these sludge‐borne materials and in a ...
Xiao-Lan, Huang, Yona, Chen, Moshe, Shenker   +2 more
openaire   +2 more sources

Fractionation and chemical properties of tear mucoids

Experimental Eye Research, 1971
Abstract The physical and chemical properties of glycoproteins in the precorneal tear film that covers the corneal epithelium have never been clearly delineated. Crude mucoid clots were collected from the conjunctival surface of rabbits. Three types of glycoprotein were fractionated by gel filtration on Sephadex G-150 using tear mucoid.
S, Iwata, I, Karbasawa
openaire   +2 more sources