Metal Toxicity Reduction in Naphthalene Biodegradation by Use of Metal-Chelating Adsorbents

ABSTRACT A model system comprising microbial degradation of naphthalene in the presence of cadmium has been developed to evaluate metal toxicity associated with polyaromatic hydrocarbon biodegradation and its reduction by the use of unmodified and surfactant-modified clays in comparison with a commercially available chelating resin (Chelex 100; Bio-Rad). The toxicity of cadmium associated with naphthalene biodegradation was shown to be reduced significantly by using the modified-clay complex and Chelex resin, while unmodified clay has no significant impact on this reduction. The degree of metal toxicity reduction can be quantitatively related to the metal adsorption characteristics of these adsorbents, such as adsorption capacity and selectivity.

Download Full-text

Psidium guajava bioactive product chemical analysis and heavy metal toxicity reduction

Chemosphere ◽

10.1016/j.chemosphere.2018.10.174 ◽

2019 ◽

Vol 216 ◽

pp. 785-793 ◽

Cited By ~ 2

Author(s):

Celestina E. Sobral – Souza ◽

Ana R.P. Silva ◽

Nadghia F. Leite ◽

Janaina E. Rocha ◽

Amanda K. Sousa ◽

...

Keyword(s):

Heavy Metal ◽

Chemical Analysis ◽

Metal Toxicity ◽

Psidium Guajava ◽

Heavy Metal Toxicity ◽

Toxicity Reduction ◽

Bioactive Product

Download Full-text

Determination of Silver Speciation in Natural Waters. 1. Laboratory Tests of Chelex-100 Chelating Resin as a Competing Ligand

Environmental Science & Technology ◽

10.1021/es001509x ◽

2001 ◽

Vol 35 (10) ◽

pp. 1953-1958 ◽

Cited By ~ 18

Author(s):

Russell T. Herrin ◽

Anders W. Andren ◽

David E. Armstrong

Keyword(s):

Laboratory Tests ◽

Natural Waters ◽

Chelating Resin ◽

Chelex 100

Download Full-text

The Nature of the Muscle-Relaxing Factor

The Journal of General Physiology ◽

10.1085/jgp.46.5.893 ◽

1963 ◽

Vol 46 (5) ◽

pp. 893-904 ◽

Cited By ~ 10

Author(s):

Franklin Fuchs ◽

F. Norman Briggs

Keyword(s):

Molecular Weight ◽

High Speed ◽

Gel Filtration ◽

Active Agent ◽

Calcium Deficiency ◽

Chelating Resin ◽

Prolonged Heating ◽

Relaxing Factor ◽

Chelex 100 ◽

High Molecular Weight Material

High speed centrifugal fractionation of homogenates of rabbit skeletal muscle has led to the discovery of a soluble muscle-relaxing factor in the homogenate. Assay of the relaxing activity with deoxycholate-treated myofibrils and reconstituted actomyosin systems has established that the activity is not produced by the presence of contaminants. Relaxing activity could be removed or destroyed by charcoal, dialysis, prolonged heating, and treatment with the chelating resin, chelex-100, making it improbable that the effect is due simply to calcium deficiency. Many of the characteristics of this muscle-relaxing factor suggest that it is very similar to or the same as the factor formed by the incubation of muscle granule fractions and ATP. Evidence is presented that some soluble protein component is involved in the stabilization of the factor. The relaxing activity could be separated from the high molecular weight material in the supernatant by the technique of gel filtration. On the basis of the gel used, the molecular weight of the active agent should be less than 4000.

Download Full-text