scholarly journals Chemical composition determination of impurities and effect on the toxicity degree of solar panel components

2020 ◽  
Vol 220 ◽  
pp. 01057
Author(s):  
Irina Vezhenkova ◽  
Margarita Semenova ◽  
Alla Kovalevskaya ◽  
Artem Gryaznov ◽  
M. Rocio Rodríguez-Barroso ◽  
...  
Keyword(s):  
Chemical Composition ◽  
European Commission ◽  
Vinyl Acetate ◽  
Solar Panel ◽  
Solar Panels ◽  
Ethyl Vinyl ◽  
Composition Determination ◽  
The Subject ◽  
Determination Of Impurities

By 2050, according to the conclusion of the European Commission, the amount of solar panels waste will reach 78 million tons. 85% of all solar panels produced today belong to polycrystalline solar panels. The subject of this paper is the polymer components of polycrystalline solar panels EVA (ethyl vinyl acetate) and Tedlar® (polyvinyl fluoride). The paper reflects studies to determine the chemical composition of impurities of the solar panel components, and the degree of impurities influence on the toxicity of polymer components.

scholarly journals Determination of the degree of toxicity of EVA and Tedlar polymers during the disposal of components of crystalline solar panels

2020 ◽  
Vol 161 ◽  
pp. 01085 ◽  
Author(s):  
Margarita Semenova ◽  
Irina Vezhenkova ◽  
Maria Stepanova ◽  
Taras Kustov
Keyword(s):  
Vinyl Acetate ◽  
Aquatic Environment ◽  
Research Method ◽  
Test Organism ◽  
Solar Panels ◽  
Ethyl Vinyl ◽  
Useful Life

The article is devoted to the determination of the degree of toxicity of the polymer components EVA (ethyl vinyl acetate) and Tedlar® (polyvinyl fluoride) solar panels at the end of their useful life. A biotest analysis was chosen as a research method. The article discusses the main provisions of the selected method, as well as the advantages of the selected test organism. The article reflects the main provisions of the selected method. The results of a study to determine the toxicity of polymer components are also presented. Based on the data obtained, the dependences of the toxicity of compounds on time are constructed. These studies show the possible consequences of the interaction of the aquatic environment (rains) with the components of solar panels during their utilization (disposal).

Strain field and chemical composition determination of InGaN/GaN and AlGaN/GaN multiple quantum wells grown on SiC substrates

2002 ◽  
Vol 92 (1) ◽  
pp. 70-76 ◽  
Author(s):  
M. A. Tagliente ◽  
L. De Caro ◽  
L. Tapfer ◽  
P. Waltereit ◽  
O. Brandt ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Quantum Wells ◽  
Strain Field ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Composition Determination

scholarly journals Chemical Composition and Antioxidant Activity of Walnut Pollen Samples

2015 ◽  
Vol 43 (2) ◽  
pp. 361-365 ◽  
Author(s):  
Sina COSMULESCU ◽  
Ion TRANDAFIR ◽  
Violeta NOUR
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Mineral Composition ◽  
Colorimetric Assay ◽  
Colorimetric Method ◽  
Antioxidant Properties ◽  
Total Phenols ◽  
Total Flavonoids Content ◽  
The Subject

Chemical composition of pollen is highly varied depending on the plant species from which it comes and has been the subject of numerous comparative studies. The aim of this study was to determine chemical composition and antioxidant activity of walnut pollen samples and compare them with those of bee pollen. Total phenols content, total flavonoids content, antioxidant activity and mineral composition were studied using walnut pollen samples from three walnut genotypes cultivated in Romania. Total phenols content was determined by colorimetric assay and their amount varied between 10.8 and 17.64 mgGAE/g per genotype. Determination of flavonoids was done by aluminium nitrate colorimetric method and total flavonoid contents in walnut pollen ranged from 7.32 to 7.95 mgQE/g. The antioxidant capacity of pollen extracts was assessed through the scavenging effects on DPPH and a concentration-dependent genotype, and it varied between 13.78 and 15.04 mg Trolox/g. In terms of mineral composition, walnut pollen appears to be a good source of potassium (859.14 mg/100 g), magnesium (263.77 mg/100 g), calcium (71.72 mg/100 g), iron (27.19 mg/100 g), sodium (10.52 mg/100 g), zinc (5.69 mg/100 g), manganese (3.98 mg/100 g), copper (1.28 mg/100 g), chromium (0.39 mg/100 g) and selenium (0.036 mg/100 g). The results obtained indicate that walnut pollen is an important source of total phenols showing antioxidant properties and mineral composition that could be beneficial to human health.

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