Results 91 to 100 of about 4,590 (135)

Hexavalent chromium in refractories

Refractories, 1993
The ecologically dangerous chromium oxide CrO3 is formed in refractories on the phase boundaries. Upon contact of chromite with alkalis and the oxides CaO, BaO, and SrO, the conversion Cr3+ → Cr6+ in air is accelerated, and occurs with remarkable speed.
L. B. Khoroshavin, V. A. Deryabin, V. A. Perepelitsyn, T. N. Lapteva   +3 more
openaire   +1 more source

Isolation of hexavalent chromium-reducing anaerobes from hexavalent-chromium-contaminated and noncontaminated environments

Applied Microbiology and Biotechnology, 1996
Hexavalent chromium [Cr(VI)], is a toxic, water-soluble contaminant present in many soils and industrial effluents. Bacteria from various soils were examined for Cr(VI) resistance and reducing potential. Microbes selected from both Cr(VI)-contaminated and -noncontaminated soils and sediments were capable of catalyzing the reduction of Cr(VI) to Cr(III)
C E, Turick, W A, Apel, N S, Carmiol
openaire   +2 more sources

Cytogenetic effects of hexavalent chromium in Bulgarian chromium platers

Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 2002
The aim of the present study was to evaluate the genotoxic effects of hexavalent chromium (Cr(VI)) in vivo in exposed Bulgarian chromium platers by using classical cytogenetic and molecular cytogenetic analyses of peripheral lymphocytes and exfoliated buccal cells. No significant difference was observed between the exposed workers and the controls with
Donka, Benova, Valeria, Hadjidekova, Rossitza, Hristova, Teodora, Nikolova, Minka, Boulanova, Ivanka, Georgieva, Mira, Grigorova, Todor, Popov, Teodor, Panev, Rossitza, Georgieva, Adayapalam T, Natarajan, Firouz, Darroudi, Robert, Nilsson   +12 more
openaire   +2 more sources

Study of an Analytical Method for Hexavalent Chromium

American Industrial Hygiene Association Journal, 1983
The diphenylcarbazide colorimetric method was evaluated by analyzing spiked PVC filters prepared by an AIHA-accredited consultant laboratory for chromium (VI). All seven participating laboratories received the samples and performed the analyses at the same time. Three laboratories simultaneously tested three alternative analytical procedures.
O P, Bhargava, H E, Bumsted, F I, Grunder, B L, Hunt, G E, Manning, R A, Riemann, J K, Samuels, V, Tatone, S J, Waldschmidt, P, Hernandez   +9 more
openaire   +2 more sources

Effects of hexavalent chromium on trout mitochondria

Toxicology Letters, 1988
Trout liver mitochondria were incubated in the presence of micromolar concentration of potassium dichromate (Cr(VI)) under several experimental conditions. Cr(VI) strongly inhibited both state 3 and state 4 of respiration supplemented by NAD-linked substrates; it also slightly affected the respiration of FAD-linked substrates. Evidence is provided that
A, Arillo, F, Melodia
openaire   +2 more sources

Metabolic deactivation of hexavalent chromium mutagenicity

Mutation Research/Environmental Mutagenesis and Related Subjects, 1978
Abstract Hexavalent chromium compounds (sodium dichromate, potassium chromate, chromic acid, basic zinc chromate and basic lead chromate) were found to be mutagenic for his − strains of S. typhimurium by inducing both frameshifts and base-pair substitutions.
F L, Petrilli, S, De Flora
openaire   +2 more sources

Hexavalent Chromium

Hexavalent chromium (Cr(VI)) is a highly toxic heavy metal widely recognized as a significant environmental pollutant. Predominantly produced through industrial activities, Cr(VI) is extensively utilized in various sectors, including electroplating, tanning, textile dyeing, and chemical manufacturing.
openaire   +2 more sources

Hexavalent Chromium Substitution

2014
From razor thin tool blade coatings to shiny custom motorcycle parts, hexavalent chromium (Hex-chrome) has historically been the coating of choice for a vast array of industrial applications. Hex-chrome has many advantages over other coating alternatives including hardness, corrosion resistance, coefficient of friction, process maturity, and economic ...
Tucker, David, Eastham, James, Smith, Joe, Varma, Sumir   +3 more
openaire   +1 more source

Chromium and hexavalent chromium

Journal of Applied Toxicology, 1993
R, von Burg, D, Liu
openaire   +2 more sources

Simultaneous remediation of hexavalent chromium and organic pollutants in wastewater using period 4 transition metal oxide-based photocatalysts: a review

Environmental Chemistry Letters, 2021
A A Jalil, F F A Aziz, M S Azami
exaly