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percolation: the passage of leachate through wastes in a mainly downward path.
(filtración)
permeable: passable; allowing fluid to penetrate or pass through it.
(permeable)
pH: a measure of the concentration of hydrogen ions in a solution; the pH scale ranges from 0 to 14, where 7 is neutral and values less than 7 are acidic and values greater than 7 are basic or alkaline; pH is an inverted logarithmic scale so that every unit decrease in pH means a 10-fold increase in hydrogen ion concentration. Thus, a pH of 3 is 10 times as acidic as a pH of 4 and 100 times as acidic as a pH of 5.
(pH)
phosphate: used generically for materials containing a phosphate group; sources include some fertilizers and detergents; when wastewater containing phosphates is discharged into surface waters, these chemicals act as nutrient pollutants (causing overgrowth of aquatic plants).
(fosfato)
photodegradable: plastic that will decompose into smaller pieces under certain kinds of radiant energy, especially ultraviolet light.
(fotodegradable)
plasma: an electrically neutral, highly ionized gas composed of ions, electrons, and neutral particles. It is a phase of matter distinct from solids, liquids, and normal gases.
(plasma)
plasma gasification: a type of advanced thermal treatment process that uses extremely high temperatures in an oxygen-starved environment to completely decompose input waste material into very simple molecules.
(gasificación con plasma)
pollutant: an impurity (contaminant) that causes an undesirable change in the physical, chemical, or biological characteristics of the air, water, or land that may be harmful to or affect the health, survival, or activities of humans or other living organisms.
(contaminante)
processing: reduction, within controlled conditions, of the initial pollutant potential of waste and/or waste volumes before landfill.
(tratar)
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