Chemical weathering process that involves the extraction or metallic cations from rocks and minerals by chelates
therapy to remove excess iron which builds up in the blood of frequent transfusion recipients
A chemical complexing (forming or joining together) of metallic cations (such as copper) with certain organic compounds, such as EDTA (ethylene diamine tetracetic acid) Chelation is used to prevent the precipitation of metals (copper) Also see sequestration
{i} (Chemistry) creation of chelates (compound made of metallic and nonmetallic ions)
the process by which both naturally occurring and artificial agents can be used as sequestering agents, thereby making radionuclides and other chemicals in a particular media available for transfer to another environment Artificial chelating agents such as EDTA have a wide variety of industrial uses, and are often used to remove radioactive contamination Unfortunately, natural chelating agents and chelating processes make plutonium oxide from stratospheric fallout and nuclear accidents which is usually in a biologically unreactive state in soils and sediment much more biologically available for uptake in pathways to human consumption Almost no information is available about the long-term mobilization of plutonium isotopes by naturally occurring chelating agents (See Hanson, 1980, Section 10)
the process of forming a ring by forming one or more hydrogen bonds (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning
Treatment of heart and other circulatory conditions through EDTA, Vitamins and Minerals, which carry out from the body, heavy metals like lead, and arsenic, as well as other foreign substances It is a clinically proven therapy for metal poisoning
Therapy is the intravenous administration of the amino acid EDTA which latches onto and helps remove excess heavy metals from the body It is often used to treat arteriosclerosis and dangerously high amounts of lead, mercury, nickel and copper in the body It also provides an alternative to bypass surgery and angioplasty
the process of forming a closely associated complex with a metal in which the meatl is surrounded by and multiply bound to part of an organic structure, thereby usually altering both the chemical reactivity and transport properties of the metal
A reaction between a metallic ion and an organic compound that removes the metallic ion from solution Chelation is a natural reaction in most soils and is enhanced by organic matter, especially humus Chelation is similar to cation exchange, except that it usually is more stable in holding ions Most of the trace cation nutrients are held in soil by chelation (copper, iron, manganese)
The process of binding and removing metal ions from the body Chelation is used to treat metal poisoning, such as lead poisoning
- A process that combines a mineral with an amino acid Our bodies have a difficult time absorbing minerals and chelation provides for better absorption
(medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning
The act or process of causing a metal ion to react with another molecule to form a chemical compound, which is unusually excreted from the body Usually refers to heavy metals, which are drawn out of the cells in the method to be excreted at a later time
The solubilisation of a metal salt by forming a chemical complex or sequestering
Process of binding a metal to another substance Of ten done with calcium to enhance absorption Although chelation helps, it is not as bioavailable as the natural organic form in which calcium is found in coral
In chemistry, this describes the combination of a metallic ion with heterocyclic ring structures in such a way that the ion is held by bonds from each of the rings
Chelation is the solubilization of a metal salt by forming a chemical complex or sequestering One way of doing this is with ethylenediaminetetra-acetic acid (EDTA) salts, which have a multidentate spiral ligand form that can surround metallic and other ions
a chemical process by which a larger molecule or group of molecules surround or enclose a mineral molecule Chelation is used to facilitate transport of minerals in several ways: to increase absorption of mineral nutrients (such as calcium and magnesium), to remove foreign, toxic substances (such as lead and arsenic), and to remove calcium-based plaque from the linings of blood vessels
the process of forming a closely associated complex with a metal in which the metal is surrounded by and multiply bound to part of an organic structure, thereby usually altering both the chemical reactivity and transport properties of the metal
a heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions form a chelate, in chemistry having or resembling chelae or claws relating to or characterized by chelation
A coordination complex in which more than one atom or molecule (often an organic compound) binds to a metal In the environment, chelation effectively removes the metal: it is no longer available for chemical interactions or to biota See Complexation
Organic chemical that forms ring compound in which a metal is held between two or more atoms strongly enough to diminish the rate at which it becomes fixed by soil, thereby making it more available for plant and microbial uptake
A form of a mineral or trace mineral whereby it is bound, usually synthetically, to a carbon based or "organic" substance Chelates can allow high concentrations of certain elements to be more readily broken down into ionic form and absorbed when compared to other minerals which are bound to other non-organic substances Chelates, however, tend not to be naturally balanced
(Pronounced KEY-late) - also called sequester - It is the process of preventing metals in the water from combining with other components in water to form colored precipitates that stain the pool walls and bottom or produce colored water
A combination of a metal ion and an organic molecule which results in making the metal ion less reactive with other chemical species in water or in a soil solution
(Pronounced KEY-late) - also called sequester - It is the process of preventing metals in the water from combining with other compon- ents in water to form colored precipitates that stain the pool walls and bottom or produce colored water
Any of a class of coordination or complex compounds consisting of a central atom of a metal (usually a transition element) attached to a large molecule (ligand). Any ligand that can bind to the metal at two or more points to form a ring structure, more stable than a nonchelated compound of the same general chemical formula, is a chelating agent. The process of binding to the metal is called chelation. Chelating agents such as EDTA salts are used in medicine to remove toxic metals (e.g., lead, cadmium) from the body. Others are used in analysis as indicators and in industry to extract metals. The iron-binding porphyrin group in hemoglobin, the magnesium-binding porphyrin in chlorophyll, and the cobalt-binding porphyrin in vitamin B12 are natural chelators