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1 Μαΐ 2021 · In 1959, Cr was considered an essential element in our diet because it has a role in metabolic pathways of glucose, proteins and lipids; it also forms complexes with nucleic acids and proteins, and it’s involved in oxidation-reduction reactions.
- Hexavalent Chromium
In this review, we highlight its nutritional role, its...
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- Hexavalent Chromium
1 Μαΐ 2021 · In this review, we highlight its nutritional role, its toxicokinetic and toxicodynamic in humans, its regulation in the industry and the biomonitoring proposal of this element in blood and urine samples with the aim to control the level of exposure of the workers in military industry and also of the general population.
6 ημέρες πριν · One of the primary advantages of trivalent chromium plating is its reduced environmental impact. Trivalent chromium is less toxic than hexavalent chromium, making it easier to handle and dispose of. It also produces fewer hazardous waste byproducts, contributing to sustainability efforts in metal finishing industries.
1 Ιουν 2024 · Common nutrients required for microbial Cr (Ⅵ) removal include carbon, nitrogen, phosphorus, sulfur, as well as trace elements like iron and manganese. Carbon sources (such as glucose or organic carbon compounds) are essential for energy production and synthesis of enzymes involved in Cr (Ⅵ) reduction [126].
11 Οκτ 2014 · Hexavalent chromium is used extensively in industrial processes such as electroplating, tanning, textile dyeing, corrosion inhibition and wood treatment, all of which produce discharge of chromium-containing effluents (Lauwerys et al. 2007).
1 Αυγ 2022 · Hexavalent chromium baths are of frequent use. Typical hexavalent chromium bath composition is as follows: (a) electrolytic solution: chromic acid, (b) anode: lead with tin up to 7%; (c) operating temperature: 45–60 °C, (d) plating current: 1.5–3.0 kA/m 2.
Soluble hexavalent chromium compounds, and in particular chromic acid (chromium trioxide), are commonly used as electrolytes in electroplating and anodising. In these processes the bursting of small gas bubbles generated by electrolysis causes the formation of mists (fine droplets of electrolyte).
