Eigencolloid
Encyclopedia
Eigencolloid is a term derived from the German language (eigen: own) and used to designate colloid
s made of pure phases. Most often such colloids are formed by the hydrolysis
of heavy metals
cations or radionuclide
s, such as, e.g., Tc(OH)4, Th(OH)4, U(OH)4, Pu(OH)4, or Am(OH)3. Colloids have been suspected for the long-range transport of plutonium
on the Nevada Test Site
.
Colloid
A colloid is a substance microscopically dispersed evenly throughout another substance.A colloidal system consists of two separate phases: a dispersed phase and a continuous phase . A colloidal system may be solid, liquid, or gaseous.Many familiar substances are colloids, as shown in the chart below...
s made of pure phases. Most often such colloids are formed by the hydrolysis
Hydrolysis
Hydrolysis is a chemical reaction during which molecules of water are split into hydrogen cations and hydroxide anions in the process of a chemical mechanism. It is the type of reaction that is used to break down certain polymers, especially those made by condensation polymerization...
of heavy metals
Heavy metals
A heavy metal is a member of a loosely-defined subset of elements that exhibit metallic properties. It mainly includes the transition metals, some metalloids, lanthanides, and actinides. Many different definitions have been proposed—some based on density, some on atomic number or atomic weight,...
cations or radionuclide
Radionuclide
A radionuclide is an atom with an unstable nucleus, which is a nucleus characterized by excess energy available to be imparted either to a newly created radiation particle within the nucleus or to an atomic electron. The radionuclide, in this process, undergoes radioactive decay, and emits gamma...
s, such as, e.g., Tc(OH)4, Th(OH)4, U(OH)4, Pu(OH)4, or Am(OH)3. Colloids have been suspected for the long-range transport of plutonium
Plutonium
Plutonium is a transuranic radioactive chemical element with the chemical symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, forming a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation...
on the Nevada Test Site
Nevada Test Site
The Nevada National Security Site , previously the Nevada Test Site , is a United States Department of Energy reservation located in southeastern Nye County, Nevada, about northwest of the city of Las Vegas...
.
See also
- ColloidColloidA colloid is a substance microscopically dispersed evenly throughout another substance.A colloidal system consists of two separate phases: a dispersed phase and a continuous phase . A colloidal system may be solid, liquid, or gaseous.Many familiar substances are colloids, as shown in the chart below...
- Colloid-facilitated transportColloid-facilitated transportColloid-facilitated transport designates a transport process by which colloidal particles serve as transport vectorof diverse contaminants in the surface water and in underground water circulating in fissured rocks...
- Cations hydrolysis