High geochemical background of potentially harmful elements. The “geochemical risk” and “natural contamination” of soils and water: awareness and policy approach in Europe with a focus on Italy

2015 ◽  
Vol 27 (1) ◽  
pp. 7-20 ◽  
Author(s):  
Carlo Cremisini ◽  
Giovanna Armiento
Keyword(s):  
Geochemical Background ◽  
Potentially Harmful Elements ◽  
Contamination Of Soils ◽  
Natural Contamination ◽  
Geochemical Risk

scholarly journals Influence of site-classification approach on geochemical background values

2020 ◽  
Vol 18 (1) ◽  
pp. 1391-1411
Author(s):  
Rimantė Zinkutė ◽  
Ričardas Taraškevičius ◽  
Margarita Jankauskaitė ◽  
Vaidotas Kazakauskas ◽  
Žilvinas Stankevičius
Keyword(s):  
Major Elements ◽  
Parent Material ◽  
Site Classification ◽  
Geochemical Background ◽  
Classification Approach ◽  
Soil Database ◽  
Potentially Harmful Elements ◽  
Soil Parent Material ◽  
Material Texture ◽  
Composite Samples

AbstractThis study of peri-urban minerogenic topsoil on glacigenic or post-glacial deposits shows the influence of the site-classification approach on the differentiated median background (DMB) values of major elements and the potentially harmful elements (PHEs) Ba, Cr, Cu, Mn, Ni, Pb and Zn. Composite samples from forests and meadows were taken in 25 sites, each of which had five sub-sites. A fraction of <2 mm was used to determine the organic matter by loss on ignition (LOI), grain size by laser diffraction and the elemental contents by X-ray fluorescence. The following five site-classification approaches are compared: geochemical (G), using relative median contents of Al, K, Ti; textural (T), according to mean percentages of clay-sized fraction (CLF) and silt fraction (SIF); lithological (L), based on soil parent material texture from the soil database; soil type (S), presented in the soil database; and parent material (P), generalising the underlying Quaternary deposits. Sites were classified into four level groups in which the DMB values were estimated after eliminating anomalies. The average ranks of three scores according to SIF, CLF, LOI, Al, K, Ti, Fe, Mg, Ca and S in the respective groups revealed the highest value for the G approach. It better eliminates the CLF and SIF influences on the median assessment indices of PHEs in sites.

Pedo-geochemical background and sediment contamination of metal(loid)s in the old mining-district of Salsigne (Orbiel valley, France)

Chemosphere ◽  
2021 ◽  
pp. 132111
Author(s):  
Gauthier Delplace ◽  
Jérôme Viers ◽  
Eva Schreck ◽  
Priscia Oliva ◽  
Philippe Behra
Keyword(s):  
Sediment Contamination ◽  
Mining District ◽  
Geochemical Background

PROBLEMS OF AGROECOLOGICAL ASSESSMENT OF LAND PLOTS FOR THEIR SUITABILITY FOR ORGANIC PRODUCTION AND DETOXIFICATION OF SOILS CONTAMINATED WITH PESTICIDES AND HEAVY METALS

2020 ◽  
Author(s):  
N.N. Novikov ◽  
◽  
S.V. Mitrofanov ◽  
N.N. Grachev ◽  
M.M. Varfolomeeva ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Russian Federation ◽  
Digital Technology ◽  
Environmental Safety ◽  
Organic Production ◽  
Federal Law ◽  
Physical Chemical ◽  
Organic Products ◽  
Contamination Of Soils ◽  
The Russian Federation

Based on the analysis of statistical yearbooks "state of contamination of soils and objects of the natural environment of the Russian Federation with pesticides and toxicants of industrial origin", analysis of the incidence of workers and the population from exposure to residual pesticides and heavy metals, the need to assess soil contamination for organic farming purposes in accordance with the requirements of article 9 of the Federal law of 03.08.2018 No. 280-FZ "on organic products and amendments to certain legislative acts of the Russian Federation"is justified. For evaluation, a digital technology is proposed in the management of environmental safety and labor protection in agriculture, developed by scientists of the ITOSH-branch of the FGBNU FNAC VIM. It is proposed to solve the problems of detoxification of soils contaminated with heavy metals and residual pesticides identified during the assessment using the available domestic and foreign experience by various methods: physical, physical-chemical, and biological.

Water decolorization using UV radiation and hydrogen peroxide: A kinetic study

2001 ◽  
Vol 44 (5) ◽  
pp. 53-60 ◽  
Author(s):  
C.A. Martín ◽  
O.M. Alfano ◽  
A.E. Cassano
Keyword(s):  
Hydrogen Peroxide ◽  
Uv Radiation ◽  
Absorption Rate ◽  
Fulvic Acids ◽  
Photon Absorption ◽  
Contaminant Concentration ◽  
Organic Substances ◽  
Mechanistic Approach ◽  
Natural Contamination ◽  
Kinetics Of

Sometimes, provision of water for domiciliary consumption faces the problem of natural contamination originated by the presence of organic substances such as humic or fulvic acids. Very often, after conventional sanitary treatments this water exhibits a persistent yellowish coloration that affects its use. Moreover, these substances may act as precursors of tri-halomethanes formation during pre-desinfection with chlorine. This paper presents, with a simplified mechanistic approach, the intrinsic reaction kinetics of natural water decolorization employing UV radiation and hydrogen peroxide. The main variables for the model are: contaminant concentration expressed as TOC, hydrogen peroxide concentration and the photon absorption rate.

scholarly journals Assessment of Mercury-Polluted Soils Adjacent to an Old Mercury-Fulminate Production Plant

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
M. Camps Arbestain ◽  
L. Rodríguez-Lado ◽  
M. Bao ◽  
F. Macías
Keyword(s):  
Surface Waters ◽  
Contaminated Soils ◽  
Flow Direction ◽  
Surface Flow ◽  
Mercury Contamination ◽  
Production Plant ◽  
Polluted Soils ◽  
Flow Through ◽  
Contamination Of Soils ◽  
Surrounding Soil

Mercury contamination of soils and vegetation close to an abandoned Hg-fulminate production plant was investigated. Maximum concentrations of Hg (>6.5 gkg−1soil) were found in the soils located in the area where the wastewater produced during the washing procedures carried out at the production plant used to be discharged. A few meters away from the discharge area, Hg concentrations decreased to levels ranging between 1 and 5 gkg−1, whereas about 0.5 ha of the surrounding soil to the NE (following the dominant surface flow direction) contained between 0.1 and 1 gkg−1. Mercury contamination of soils was attributed (in addition to spills from Hg containers) to (i) Hg volatilization with subsequent condensation in cooler areas of the production plant and in the surrounding forest stands, and (ii) movement of water either by lateral subsurface flow through the contaminated soils or by heavy runoff to surface waters.

Analysis of natural contamination components and sources of insulators on ±800 kV DC lines

2019 ◽  
Vol 167 ◽  
pp. 192-198
Author(s):  
Zhenghao He ◽  
Feng Gao ◽  
Zhifei Tu ◽  
Yuchan Zhang ◽  
Hui Chen
Keyword(s):  
Natural Contamination
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