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Chromium - PubMed

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Last Updated: 17 September 2022

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Novel insight on chemo-specific detection of toxic environmental chromium residues existing as recalcitrant Cr(III)-carboxyl complexes using plasmonic silver nanoplatform bi-functionalized with citrate and PVP.

Chromium is a hazardous environmental pollutant that is principally present in trivalent and hexavalent forms. Despite Crashes being more harmful than Cr, the trivalent Cr forms complexes with environmentally-available organic molecules are more complex. For the determination of trivalent chromium organic complexes such as Cr-EDTA, Cr-acetate, Cr-citrate, and Cr-artrate, we have developed ultrasensitive plasmonic nanosensor based on citrate and PVP functionalized Ag nanoparticles in this research. Upon detection, the yellow-colored Ag-citrate-PVP NPs turned into different shades of brown, depending on the type of the Cr complex and concentration. Absorbance reduction was also correlated in a linear fashion with analyte concentration. The sensor was non-functional to other metal ions and inorganic anions in the selectivity tests. Cr-E, Cr-A, Cr-C, and Cr-T complexes were found to be 3. 29, 4. 87, 1. 76, and 1. 79 nM respectively, with a maximum limit of detection.

Source link: https://doi.org/10.1016/j.saa.2022.121789


Removal of hexavalent chromium ions using micellar modified adsorbent: isothermal and kinetic investigations.

Hexavalent chromium is a highly corrosive oxyanion and has had a detrimental effect on human health. This review examined the possibility of removing chromium using micellar modified adsorbents. chromium was extracted from locally available wheat bran using separate applications of anionic sodium dodecyl sulfate and cationic cetyl ammonium bromide surfactants in this research. The kinetic investigation was carried out by a Pseudo first-order and second-order kinetic models to analyze the data. Both WB and CTAB-mWB derives metal ion removal at lower pH levels, whereas SDS-mWB requires a pH between 4 and 6, which requires maximum percentage removal of Cr. The equilibrium results of WB and SDS-mWB were calculated by the Langmuir adsorption isotherm, but the results of CTAB-mWB were also consistent in the Freundlich isotherm model. CTAB-mWB can be used for the removal of chromium primarily by a high affinity with adsorbate molecules and adsorption capacity, according to the study.

Source link: https://doi.org/10.1039/d2ra03906k


Oxidation leaching of chromium from electroplating sludge: Ultrasonic enhancement and its mechanism.

The experimental results show that hydrogen peroxide and sodium hypochlorite have different leaching properties on various types of electroplating sludge. Hydrogen peroxide proves to be a more effective oxidizer for chromium sludge, and Cr's leaching capacity could be increased from 77. 22% to 87. 08% under ideal conditions. Interestingly, sodium hypochlorite delivered higher leaching results than hydrogen peroxide for the mixed sludge, considering that the organic matter in the sludge would lead to rapid decomposition and consumption of hydrogen peroxide. Under ideal circumstances, Cr from the mixed sludge's leaching rate could even be increased from 582. 8% to 67. 1 percent. Ultrasonic enhancement can leave voids and cracks on the surface of the sludge particles, increasing the contact between electroplating sludge and leaching agents and improving oxidation leaching performance, according to the scanning electron microscope images.

Source link: https://doi.org/10.3389/fchem.2022.958773


Intestinal microbiomics and liver metabolomics insights into the preventive effects of chromium (III)-enriched yeast on hyperlipidemia and hyperglycemia induced by high-fat and high-fructose diet.

The results showed that oral administration of YCr significantly reduced the aberrant rises in body weight, blood glucose, and lipid levels, liver cholesterol, and triglyceride levels caused by HFHFD. Oral YCr intervention reduced HFHFD-mediated liver lipid accumulation, according to a liver histological examination. Besides, 16S rDNA amplicon sequencing demonstrated that YCr intervention was also helpful in alleviating intestinal microbiota dysbiosis by altering the proportion of various intestinal microbial phylotypes. According to a Correlation-based network review, the key intestinal microbial phylotypes influenced by YCr were closely related to some biochemical properties associated with glucose and lipid metabolism. Some biomarkers important in purine metabolism, glycerophospholipid metabolism, citrate cycle, pyrimidine metabolism, pyrimidine metabolism, glycerophospholipid metabolism, phosphate cycle, pyrimidine metabolism, phenylalanine, tyrosine, and tryptophan biosynthesis, and so on, according to a dietary YCr intervention, tyrosine, tyrosine biosynthesis, e metabolit.

Source link: https://doi.org/10.1016/j.crfs.2022.08.015


Synthesis of cellulose II-based spherical nanoparticle microcluster adsorbent for removal of toxic hexavalent chromium.

Since natural cellulose is mainly cellulose I and has a fibrous structure, most cellulose-based adsorbents are fibrous/rod-shaped and have the cellulose I crystal structure. In detail, the adsorption process and mechanism of SNMA on Cr were investigated. The SNMA achieved a high adsorption capacity and receptor site density. The SNMA is expected to be used as a bio-based spherical nanoparticle adsorbent platform for the adsorption of various hazardous substances by altering the surface functional groups of its constituents, spherical nanoparticles.

Source link: https://doi.org/10.1016/j.ijbiomac.2022.09.016


Physiological, biochemical, and genomic elucidation of the Ensifer adhaerens M8 strain with simultaneous arsenic oxidation and chromium reduction.

With the addition of Cr alone, the strain M8 could simultaneously oxidize 1 mM As and reduce 45. 3 % 0. 1 mM Cr in 16 h, and the Cr reduction rate was up 5. 8 percent. M8's genome contained one chromosome and four plasmids, and a comparison of the genomes revealed that M8 had two more plasmids than strains of the same genus, which may be related to widespread environmental adaptations.

Source link: https://doi.org/10.1016/j.jhazmat.2022.129862


Brassinosteroid Supplementation Alleviates Chromium Toxicity in Soybean (Glycine max L.) via Reducing Its Translocation.

However, no research has been done into the protective role of brassinosteroids in soybean plants against Cr-induced stress. Herein, the morpho-biochemical, biochemical, and molecular responses of soybean cultivars with/without foliar application of BRs under Cr toxicity were rigorously investigated. In addition, BRs enhanced Cr stress tolerance in soybean seedlings by regulating the expression of stress-related genes involved in Cr accumulation and translocation. Despite, in Cr polluted soil, an effective inhibitor of Cr-induced injuries in soybean cultivars can be considered a great reducer of Cr-induced damages in soybean cultivars by considering the above-mentioned biomarkers.

Source link: https://doi.org/10.3390/plants11172292

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions