Advertisement

Topics

Hexavalent chromium removal by magnetic particle-loaded micro-sized chitinous egg shells isolated from ephippia of water flea.

07:00 EST 4th February 2019 | BioPortfolio

Summary of "Hexavalent chromium removal by magnetic particle-loaded micro-sized chitinous egg shells isolated from ephippia of water flea."

Modified chitin and magnetic particles are two important materials widely used in heavy metal removal studies. Loading of magnetic particles into conventional adsorbents has emerged as a recent convenient way to improve the properties of adsorptive materials. Compared to its deacetylated form chitosan, chitin has very limited use in removal of contaminants because of its insolubility in aqueous environments. This study reports an easy way to produce micro-sized chitin and gives details on loading of magnetic particles into micro-sized chitin to enhance the interaction of chitin with heavy metal contaminant; hexavalent chromium Cr(VI). Removal of Cr(VI) ions from the aquatic environments is of high importance considering its detrimental effects on human health. Chitin microcages that had been isolated from the ephippial eggs of Daphnia longispina (crustacean, water flea) were incorporated with magnetic particles. Chitin microcages and magnetic particles-loaded chitin microcages were tested in removal of Cr(VI) under different solution and operational parameters; adsorbent dosage, contact time, Cr(VI) ion concentration, pH and temperature. Magnetic particles-loaded chitin microcages yielded higher Cr(VI) removal performance under all the specified conditions; chitin microcages: 0.77 mmol/ g and particles-loaded chitin microcages: 1.29 mmol/ g.

Affiliation

Journal Details

This article was published in the following journal.

Name: International journal of biological macromolecules
ISSN: 1879-0003
Pages:

Links

DeepDyve research library

PubMed Articles [11213 Associated PubMed Articles listed on BioPortfolio]

Facile modification of activated carbon with highly dispersed nano-sized α-FeO for enhanced removal of hexavalent chromium from aqueous solutions.

Activated carbon-coated α-FeO nanoparticles (nFeO@AC) were synthesized by a facile impregnation method to enhance hexavalent chromium (Cr(VI)) removal from water. The SEM images confirmed that α-FeO...

Immobilization of hexavalent chromium in contaminated soil using nano-magnetic MnFeO.

Nano-magnetic MnFeO was prepared and examined to immobilize Cr(VI) in the soil. According to the results of scanning electron microscopy (SEM) and X-ray diffraction (XRD) the formation of nano-magneti...

Preparation of quaternary amine-grafted organosolv lignin biosorbent and its application in the treatment of hexavalent chromium polluted water.

A novel cationic biosorbent was synthesized by grafting organosolv lignin with GT (also named (2-hydrazinyl-2-oxoethyl)-trimethylazanium chloride, abbreviated as GT) and formaldehyde in an aqueous sol...

Mechanistic insights into adsorption and reduction of hexavalent chromium from water using magnetic biochar composite: Key roles of FeO and persistent free radicals.

Magnetic biochar (MBC) has been used to remove hexavalent chromium (Cr(VI)) from water, but the roles of FeO and persistent free radicals (PFRs) in MBC in Cr(VI) removal are still less investigated. I...

Evaluation of the potential of coal fly ash produced by gasification as hexavalent chromium adsorbent.

The aim of this work was to characterize the coal fly ash from gasification process (G-CFA) and to analyze its potential as hexavalent chromium Cr (VI) adsorbent. The G-CFA was characterized in terms ...

Clinical Trials [4396 Associated Clinical Trials listed on BioPortfolio]

Micro-Particle Curcumin for the Treatment of Chronic Kidney Disease

An investigator initiated pilot trial: two arm, double blind, placebo controlled, randomized, parallel group of approximately 750 patients with chronic kidney disease, and who have evidenc...

Chromium and Insulin Resistance

Chromium is an essential nutrient for the maintenance of normal glucose tolerance and its deficiency causes insulin resistance. Chromium administration has also been shown in several studi...

The Influence of Bone Allograft Particle Sizes on the Quantity and Quality of New Bone Formation in Grafted Extraction Sockets and Edentulous Ridges

This study will evaluate the effect of allograft bone particle size on the bone quantity and quality following socket grafting and lateral ridge augmentation in preparation for endosseous ...

Assessment of the Mu-Drop System for Serum Eye Drops

Rationale: Serum eye drops (SEDs) are used to treat patients with severe signs and symptoms of dry eyes and other corneal defects. Serum is used in severe ophthalmic cases where convention...

Chromium's Effect on Insulin Resistance in Obesity

This research is to investigate the nutritional supplement chromium picolinate. A large number of people use chromium picolinate from health food stores to improve the function of the hor...

Medical and Biotech [MESH] Definitions

Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes.

Unstable isotopes of chromium that decay or disintegrate emitting radiation. Cr atoms with atomic weights of 46-49, 51, 55, and 56 are radioactive chromium isotopes.

Inorganic compounds that contain chromium as an integral part of the molecule.

A trace element that plays a role in glucose metabolism. It has the atomic symbol Cr, atomic number 24, and atomic weight 52. According to the Fourth Annual Report on Carcinogens (NTP85-002,1985), chromium and some of its compounds have been listed as known carcinogens.

Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article