ANC meaning in Academic & Science ?

Answer:

What is Acid Neutralizing Capacity mean?

Acid-neutralizing capacity or ANC in short is a measure for the overall buffering capacity against acidification of a solution, e.g. surface water or soil water.

ANC is defined as the difference between cations of strong bases and anions of strong acids (see below), or dynamically as the amount of acid needed to change the pH value from the sample's value to a chosen different value. The concepts alkalinity are nowadays often used as a synonym to positive ANC and similarly acidity is often used to mean negative ANC. Alkalinity and acidity however also have definitions based on an experimental setup (titration).

ANC is often used in models to calculate acidification levels from acid rain pollution in different geographical areas, and as a basis for calculating critical loads for forest soils and surface waters.

The relation between pH and ANC in natural waters depends on three conditions: Carbon dioxide, organic acids and aluminium solubility. The amount of dissolved carbon dioxide is usually higher than would be the case if there was an equilibrium with the carbon dioxide pressure in the atmosphere. This is due to biological activity: Decomposition of organic material releases carbon dioxide and thus increases the amount of dissolved carbon dioxide. An increase in carbon dioxide decreases pH but has no effect on ANC. Organic acids, often expressed as dissolved organic carbon (DOC), also decrease pH and have no effect on ANC. Soil water in the upper layers usually have higher organic content than the lower soil layers. Surface waters with high DOC are typically found in areas where there is a lot of peat and bogs in the catchment. Aluminium solubility is a bit tricky and there are several curve fit variants used in modelling, one of the more common being

[ Al 3 + ] = k G [ H + ] 3 {\displaystyle [{\ce {Al^{3+}}}]=k_{G}[{\ce {H}}^{+}]^{3}}

In the illustration to the right, the relation between pH and ANC is shown for four different solutions. In the blue line the solution has 1 mg/l DOC, a dissolved amount of carbon dioxide that is equivalent to a solution being in equilibrium with an atmosphere with twice the carbon dioxide pressure of our atmosphere. For the other lines, all three parameters except one is the same as for the blue line. Thus the orange line is a solution loaded with organic acids, having a DOC of 80 mg/l (typically very brown lake water or water in the top soil layer in a forest soil). The red line has a high amount of dissolved carbon dioxide (pCO2=20 times ambient), a level that is not uncommon in ground water. Finally the black dotted line is a water with a lower aluminium solubility.

The reason why ANC is often defined as the difference between cations of strong bases and anions of strong acids is that ANC is derived from a charge balance: If we for simplicity consider a solution with only a few species and use the fact that a water solution is electrically neutral we get

[ H + ] reference

Full Form	Category
Acid Neutralization Capacity	Academic & Science
Acid Neutralizing Capacity	Academic & Science
Aaniiih Nakoda College	Academic & Science
ancient	Academic & Science
National Academy of Surgery	Academic & Science
Académie Nationale de Chirurgie	Academic & Science
National Academy of Sciences (Costa Rica)	Academic & Science
Academia Nacional de Ciencias	Academic & Science
Air Navigation Commission	Academic & Science
Advisory Neighborhood Commissioners	Business
Advisory Neighborhood Commissions	Business
Association of Noise Consultants	Business
Academy of the New Church	Community
Action for Neighbourhood Change	Community
Annual National Conference	Community
Advisory Neighborhood Commission	Community
Austin Neighborhoods Council	Community
African National Congress	Computing
Ancillary	Computing
Advanced Numeric Control	Computing
Announcement Controller	Computing
Advanced Network Conference	Computing
Advanced Networking Center	Computing
Annual Network Conference	Computing
All Number Calling	Computing
Anchor Protocol	Cryptocurrency
Anoncoin	Cryptocurrency
Arkansas Northeastern College	Educational Institute
Active Noise Cancelling	Electronics
Automatic Noise Cancelling	Electronics
Canon Computer Pattern Maker List of Pattern Colors	File Type
Actual Neurological Condition	General
Active Natural Cells	General
Active Noice Cancellation	General
All Night Canteen	General
Alcohol Not Cigarette	General
Ayeye Nayi Corona	General
Aquatic Nuisance Control	General
Average Neighbor Count	General
Active Noise Control	General
Asheville North Carolina	General
Automatic Noise Control	General
Arts aNd Crafts	General
Automated Numerical Control	General
Adaptive and Neural Computation	General
American National Corpus	General
Accumulation Nepotism Cronyism	General
Another New Con	General
Active Noise Cancellation	General
Ante Natal Check	General
Amazing Nail Concepts	General
Another NkaNdla Coming	General
Another Naughty Coon	General
Another Nightmare Coming	General
Active Nibble Cancellation	General
Automotive News China	General
All New Corolla Club	General
Acura Networking Club	General
Action Nationale des Chauffeurs	General
Automotive News Canada	General
Accumulation Nepotism and Corruption	Governmental
Armee Nationale Congolaise	Governmental
African National Party [South Africa]	Governmental
Anchorage International Airport	Governmental
All Nations Club	Governmental
All National Cargoes	Governmental
African National Commission	Governmental
ANNECHAKANAHALI	Indian Railway Station
Asamblea Nacional Constituyente	International
Asociación Nacional Campesina Pro-Tierra	International
Absolute Neutrophil Count	Medical
Annoying New Character	Messaging
Air Force, Navy, Civil	Military and Defence
Army Nurse Corps	Military and Defence
Augmented Network Center	Networking
Automatic Network Control	Networking
Atlantic and North Carolina Railroad	Regional
African National Corruption	Regional
Alaska Native Corporation	Regional
Anchorage, Alaska USA	Regional
African New Consensus	Regional
Arlington National Cemetery	Space Science
Access Network Controller	Telecommunication