ALADYR provides the community with this glossary of terms to standardize concepts among interested parties such as the media, educational institutions, commercial and non-profit companies, organizations, government agencies, among others. It is still under construction, and we aim to add more and more terms every day and become a reference and consultation source for interested parties. If you wish to contribute with a new term or enhance the existing ones, please reach us at [email protected]. Your contribution will be credited to your company. (Only applies for ALADYR members)
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Acid-: a substance that has a pH of less than 7, which is neutral. Specifically, an acid has more free hydrogen ions (H+) than hydroxyl ions (OH-). (USGS)

Activated carbon filters: They are mainly used for the removal of chlorine and organic compounds in water. The operating system is similar to sand filters, with the retention of contaminants by passing the water through a filtering bed composed of activated carbon (Se Filtra).

Aeration: A technique used in water treatment that requires a source of oxygen, commonly known as aerobic biological water purification. This technique brings water into contact with air droplets or by spraying the air with aeration facilities. Then presses the air through the water surface, and bubbles and supplies water with oxygen.

Adhesion: the process of water being attracted or adhering to other substances (USGS).

Alkalinity: the capacity of water for neutralizing an acid solution. (USGS)

Aqueduct: is a system or set of irrigation systems that enables water to be conveyed in a continuous flow from a place where it is accessible in nature to a distant point of consumption, generally a city or town.

Aquifers: a geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs (USGS). 

Artificial recharge: a process where water is put back into groundwater storage from surface-water supplies such as irrigation, or induced infiltration from streams or wells (USGS).