Glossary A

The Environmental Glossary. Letter A +++ Popular Articles: 'Adulterants', 'Acid', 'Abatement Debris'

Deutsch: Saurer Regen / Español: Lluvia Ácida / Português: Chuva Ácida / Français: Pluie Acide / Italiano: Pioggia Acida /

Acid rain is the result of sulfur dioxide (SO2) and nitrogen oxides (NOx) reacting in the atmosphere with water and returning to earth as rain, fog, or snow. Broadly used to include both wet and dry deposition. The acid rain page provides a great deal of information about this issue.

An Acid Rinse is Part of the equipment cleaning process for stainless steel and rubber parts, removes fat, protein and minerals and also reduces bacteria.

(See Equipment Sanitization)

An Acid Solution is any water solution that has more hydrogen ions (H+) than hydroxide ions (OH-); any water solution with a pH less than 7.

See basic solution, neutral solution.

Deutsch: Sauer / Español: Ácido / Português: Ácido / Français: Acide / Italiano: Acido /

Acidic is the condition of water or soil that contains a sufficient amount of Acid substances to lower the pH below 7.0.

See Acid solution.

An acidification is Refers to reducing something's pH, making it more acidic; also means the loss of ANC.

Acidity may be defined as the quality, state or degree of being acid ; or the level of acid in a substance.

Acidity is measured in pH, or the negative log of the activity of the hydrogen ion in an aqueous solution. Solutions with a pH less than 7 are said to be acidic. The pH of an aqueous substance can be measured using a glass electrode and a pH meter, or with the use of pH indicators .

Or a more chemical definition: Acidity is a measure of the number of free hydrogen ions (H+) in a solution that can chemically react with other substances.

An Acre is the unit of measure most typically used to describe land area in the United States. It is equivalent to about 4046 square meters (m²) or (in the USA) to 43,560 square feet and is about 9/10 the size of an american football field.

- Acre-foot: An acre-foot (acre-ft) is the volume of water required to Cover 1 Acre of land (43,560 square feet) to a depth of 1 foot. Equal to 325,851 gallons or 1,233 cubic meters.

Deutsch: Aktion / Português: Action / Français: Action / Italiano: Action

In the environmental context, "action" refers to activities and initiatives taken to address environmental problems and promote sustainable practices.

Deutsch: Aktionsstufe / Español: Nivele de Acción / Português: Níveis de Ação / Français: Niveaux d'Action / Italiano: Livelli di Azione /

The term action level refers to a specific level of concentration of a toxic substance, contaminant or radiation that when met or exceeded, is considered dangerous enough for remedial or regulatory action by a governing body or other authority to be warranted.

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