The Determination of Trace Inorganic Contaminants in Polyimides

1983 ◽  
Vol EI-18 (4) ◽  
pp. 369-373 ◽  
Author(s):  
E. Sacher
Keyword(s):  
Inorganic Contaminants

scholarly journals Trace Elements in Mediterranean Mussels Mytilus galloprovincialis from the South African West Coast

2015 ◽  
Vol 22 (4) ◽  
pp. 489-498 ◽  
Author(s):  
Jacques Bezuidenhout ◽  
Nicole Dames ◽  
Alfred Botha ◽  
Marina V. Frontasyeva ◽  
Zoya I. Goryainova ◽  
...  
Keyword(s):  
Trace Elements ◽  
South African ◽  
Mytilus Galloprovincialis ◽  
Soft Tissues ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Inorganic Contaminants ◽  
Bivalve Molluscs ◽  
Icp Ms

Abstract Invasive bivalve molluscs, Mediterranean mussels (Mytilus galloprovincialis) were used as sentinel biomonitors of pollution by inorganic contaminants in Saldanha Bay and the Langebaan Lagoon area of South Africa. Two complementary analytical techniques, ICP-MS and NAA, allowed for determination of concentrations of 31 major and trace elements including heavy metals and arsenic in the soft tissues of the mussels. Distinct seasonal patterns were found in the dynamics of these concentrations, with the mussels accumulating much more trace elements in winter than in the summer. In general, the mussels that grew naturally also demonstrated higher concentrations of As, Cd, Fe, Hg and Zn than those that were farmed. Fe showed the highest levels with a maximum concentration of 444 mg/kg followed by Zn with a maximum of 228 mg/kg. The concentrations of Mn and Pb were significantly higher in the Port of Saldanha close to the jetty where ores containing these metals are loaded in comparison with the other sampling sites. It was concluded that bivalve molluscs present themselves as effective biomonitors when assessing marine aquatic pollution by inorganic contaminants in the Saldanha Bay region.

Electrochemical Determination of Inorganic Contaminants in Automotive Fuels

2012 ◽  
pp. n/a-n/a
Author(s):  
André L. Santos ◽  
Regina M. Takeuchi ◽  
Rodrigo A. A. Muñoz ◽  
Lúcio Angnes ◽  
Nelson R. Stradiotto
Keyword(s):  
Electrochemical Determination ◽  
Inorganic Contaminants ◽  
Automotive Fuels

Determination of radioactive contaminants in sediment and sand samples from the Black Sea by HPGe Gamma-ray spectrometry

2020 ◽  
Vol 55 (2) ◽  
pp. 141-145
Author(s):  
H. Yücel ◽  
R. Güven ◽  
İ. Demirel
Keyword(s):  
Black Sea ◽  
Gamma Ray ◽  
Industrial Wastes ◽  
Coastal Pollution ◽  
The Black Sea ◽  
Gamma Ray Spectrometry ◽  
Inorganic Contaminants ◽  
The Core ◽  
Radionuclide Contamination

The radionuclide activities were measured in sea sediment and coastal sand samples taken from the Black Sea to improve the understanding on coastal pollution as sediments and sand act as a sink for inorganic contaminants from various sources. The core sediments were taken from the Black Sea near to Varna city and sand samples were collected from in the Black Sea Coastal of North Anatolia. Their radionuclide contents were measured using a high resolution gamma-ray spectrometry. The activity results are found to be on the average, 65 ± 9 Bq · kg−1 for 210Pb, 13 ± 1 Bq · kg−1 for 137Cs, 36 ± 4 Bq · kg−1 for 226Ra, 25 ± 3 Bq · kg−1 for 232Th, and 403 ± 13 Bq · kg−1 for 40K in slices from the sediment core. The radionuclide activities in sand samples collected from the Black Sea coastal are measured for 7Be (2.4 ± 0.4 to 5.8 ± 0.4 Bq · kg−1) and for 137Cs (2.0 ± 0.1 to 3.7 ± 0.2 Bq · kg−1). In sand samples, other natural occurring radionuclides 226Ra (6.8 ± 1.1 to 12.5 ± 1.3 Bq · kg−1), 232Th (6.5 ± 0.8 to 16.9 ± 1.4 Bq · kg−1) and 40K(139 ± 8 to 376 ± 16 Bq · kg−1) were also observed, as expected. The present results indicate that there is still noticeable radionuclide contamination in sediments and coastal sands due to mainly the Chernobyl nuclear accident and other conventional industrial wastes.

Occurrence and determination of inorganic contaminants in baby food and infant formula

2019 ◽  
Vol 30 ◽  
pp. 60-66 ◽  
Author(s):  
Esther Lima de Paiva ◽  
Marcelo Antônio Morgano ◽  
Adriana Pavesi Arisseto-Bragotto
Keyword(s):  
Infant Formula ◽  
Baby Food ◽  
Inorganic Contaminants

Plasma-based determination of inorganic contaminants in waste of electric and electronic equipment after microwave-induced combustion

2015 ◽  
Vol 105 ◽  
pp. 95-102 ◽  
Author(s):  
Paola A. Mello ◽  
Lisarb O. Diehl ◽  
Jussiane S.S. Oliveira ◽  
Edson I. Muller ◽  
Marcia F. Mesko ◽  
...  
Keyword(s):  
Electronic Equipment ◽  
Inorganic Contaminants

scholarly journals Determination of inorganic contaminants in carbon nanotubes by plasma-based techniques: Overcoming the limitations of sample preparation

Talanta ◽  
2019 ◽  
Vol 192 ◽  
pp. 255-262 ◽  
Author(s):  
Sindy R. Krzyzaniak ◽  
Gabrielle D. Iop ◽  
Alice P. Holkem ◽  
Erico M.M. Flores ◽  
Paola A. Mello
Keyword(s):  
Carbon Nanotubes ◽  
Sample Preparation ◽  
Inorganic Contaminants

scholarly journals BIOCHAR PRODUCTION FROM WASTE BIOMASS: CHARACTERIZATION AND EVALUATION FOR AGRONOMIC AND ENVIRONMENTAL APPLICATIONS

Detritus ◽  
2021 ◽  
pp. 15-29
Author(s):  
Frantseska-Maria Pellera ◽  
Panagiotis Regkouzas ◽  
Ioanna Manolikaki ◽  
Evan Diamadopoulos
Keyword(s):  
Aqueous Media ◽  
Grape Pomace ◽  
Environmental Applications ◽  
Waste Biomass ◽  
Inorganic Contaminants ◽  
Biomass Characterization ◽  
Different Types ◽  
Physical And Chemical ◽  
Selection Of

This study focused on the valorization of different types of waste biomass through biochar production at two pyrolysis temperatures (400 and 600°C). The different feedstocks being used included three materials of municipal origin, specifically two types of sewage sludge and the organic fraction of municipal solid waste, and three materials of agroindustrial origin, specifically grape pomace, rice husks and exhausted olive pomace. The scope of the research was to characterize the resulting materials, in order to evaluate their possible uses in agronomic and environmental applications. Biochar characterization included the determination of several physical and chemical parameters, while germination assays were also carried out. Under the investigated conditions, both pyrolysis temperature and feedstock type appeared to significantly affect biochar characteristics, leading to the production of versatile materials, with many different possible uses. Specifically, results implied that biochars of both municipal and agroindustrial origin have the potential to effectively be used in applications including the improvement of soil characteristics, carbon sequestration, the removal of organic and inorganic contaminants from aqueous media, and the remediation of contaminated soil, with the degree of suitability of each material to each specific use being estimated to differ depending on its particular characteristics. For this reason, with these characteristics in mind, before proceeding to larger scale applications a cautious selection of materials should be conducted.

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