Advertisement

Topics

Competitive binding of Cd, Ni and Cu on goethite organo-mineral composites made with soil bacteria.

08:00 EDT 4th September 2018 | BioPortfolio

Summary of "Competitive binding of Cd, Ni and Cu on goethite organo-mineral composites made with soil bacteria."

Soil is a heterogeneous porous media that is comprised of a variety of organo-mineral aggregates. Sorption of heavy metals onto these composite solids is a key process that controls heavy metal mobility and fate in the natural environment. Pollution from a combination of heavy metals is common in soil, therefore, understanding the competitive binding behavior of metal ions to organo-mineral composites is important in order to predict metal mobility and fate. In this study, batch experiments were paired with spectroscopic studies to probe the sorption characteristics of ternary CdNiCu sorbates to a binary organo-goethite composite made with Bacillus cereus cells. Scanning electron microscopy shows that goethite nano-sized crystals are closely associated with the bacterial surfaces. Sorption experiments show a larger adsorptivity and affinity for Cu than Cd/Ni on goethite and B. cereus, and the goethite-B. cereus composite. X-ray photoelectron spectroscopy reveals that carboxylate and phosphate functional moieties present on the bacterial cell walls are primarily responsible for metal sorption to the goethite-B. cereus composite. Synchrotron-based X-ray fluorescence shows that Cu and Ni are predominately associated with the bacterial fraction of the goethite-B. cereus composite, whereas Cd is mainly associated with the goethite fraction. The findings of this research have important implications for predicting the mobility and fate of heavy metals in soil multi-component systems.

Affiliation

Journal Details

This article was published in the following journal.

Name: Environmental pollution (Barking, Essex : 1987)
ISSN: 1873-6424
Pages: 444-452

Links

DeepDyve research library

PubMed Articles [9779 Associated PubMed Articles listed on BioPortfolio]

Using chromate to investigate the impact of mineral-organic contact time on the surface reactivity of goethite.

Chromate was used as a chemical probe to investigate the impact of mineral-organic contact time on the surface reactivity of two different sizes of goethite particles. A series of goethite-chromate so...

Soil mineral alters the effect of Cd on the alkaline phosphatase activity.

The toxicity of heavy metals (HMs) to soil enzymes is directly influenced by the status of the enzyme (free vs. immobilized on minerals) and the duration of exposure. However, little information is av...

Interactions between Goethite and Humic Acid and the Stability of Goethite-Humic Acid Complex.

Goethite-humic acid complex was prepared in a suspension containing goethite and humic acid. X-ray diffraction (XRD) results showed that the crystal structure of this complex had no obvious changes co...

Protection of extractable lipid and lignin: Differences in undisturbed and cultivated soils detected by molecular markers.

Understanding formation of organo-mineral association is crucial for soil organic matter (SOM) stabilization. To remove reactive minerals from un-disturbed natural soil (NS) and two cultivated soils (...

Bonding of monocarboxylic acids, monophenols and nonpolar compounds onto goethite.

Adsorption of a diverse set of chemicals onto goethite was evaluated by column chromatography. The pH of the effluents was 4.7-5.2. Van der Waals forces dominate the exothermic adsorption of 8 nonpola...

Clinical Trials [2195 Associated Clinical Trials listed on BioPortfolio]

Composites and Urinary Bisphenol-A Study

The Composites and Urinary Bisphenol-A Study (CUBS) is a clinical study of dental composite for its effects on urinary bisphenol-A levels. The study will enroll approximately 139 children ...

Effects of Mineral Water Consumption on Serum Lipid Parameters

The purpose of the study is to determine the effect of a specific mineral water on serum lipid concentrations in healthy subjects.

Comparison of Bone Mineral Density Changes During Tx With Risperidone or Aripiprazole in Adolescents

This study examines if the use of antipsychotic medications might contribute to an interruption in bone mineral development and/or a reduction in bone mineral content in adolescents.

Dietary Intake of Salmon and Bone Health

The aims of this study were to investigate how intake of tailor-made salmon affected bone biomarkers, nutritional status, as well as body composition and bone mineral density. The 122 heal...

First-in-Human Positron Emission Tomography Study Using the 18F-αvβ6-Binding-Peptide

This clinical trial studies the side effects of 18F-alphavbeta6-binding-peptide and how well it works in imaging patients with primary or cancer that has spread to the breast, colorectal, ...

Medical and Biotech [MESH] Definitions

The interaction of two or more substrates or ligands with the same binding site. The displacement of one by the other is used in quantitative and selective affinity measurements.

Water naturally or artificially infused with mineral salts or gases (carbon dioxide).

Americium. A completely man-made radioactive actinide with atomic symbol Am, atomic number 95, and atomic weight 243. Its valence can range from +3 to +6. Because of its nonmagnetic ground state, it is an excellent superconductor. It is also used in bone mineral analysis and as a radiation source for radiotherapy.

The direct struggle between individuals for environmental necessities or for a common goal.

An antigen solution emulsified in mineral oil. The complete form is made up of killed, dried mycobacteria, usually M. tuberculosis, suspended in the oil phase. It is effective in stimulating cell-mediated immunity (IMMUNITY, CELLULAR) and potentiates the production of certain IMMUNOGLOBULINS in some animals. The incomplete form does not contain mycobacteria.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Radiology
Radiology is the branch of medicine that studies imaging of the body; X-ray (basic, angiography, barium swallows), ultrasound, MRI, CT and PET. These imaging techniques can be used to diagnose, but also to treat a range of conditions, by allowing visuali...


Searches Linking to this Article