acid waste water

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• Acid-free paper — is paper that has a neutral or basic pH (7 or slightly greater). It addresses the problem of preserving documents for long periods. Overview Paper made from wood based pulp that has not had its lignin removed goes yellow and deteriorates over… …   Wikipedia

• Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …   Wikipedia

• Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …   Wikipedia

• Water quality — A rosette sampler is used to collect samples in deep water, such as the Great Lakes or oceans, for water quality testing. Water quality is the physical, chemical and biological characteristics of water.[1] It is a measure of the condition of… …   Wikipedia

• Acid mine drainage — Yellow boy in a stream receiving acid drainage from surface coal mining. Acid mine drainage (AMD), or acid rock drainage (ARD), refers to the outflow of acidic water from (usually abandoned) metal mines or coal mines. However, other areas where… …   Wikipedia

• Water — This article is about general aspects of water. For a detailed discussion of its properties, see Properties of water. For other uses, see Water (disambiguation) …   Wikipedia

• Water softening — A water softener reduces the dissolved calcium, magnesium, and to some degree manganese and ferrous iron ion concentration in hard water.These hardness ions cause three major kinds of undesired effects. Most visibly, metal ions react with soaps… …   Wikipedia

• Water fluoridation controversy — The water fluoridation controversy arises from moral, ethical, and safety concerns regarding the fluoridation of public water supplies. The controversy occurs mainly in English speaking countries, as Continental Europe does not practice water… …   Wikipedia

• acid — n. & adj. n. 1 Chem. a any of a class of substances that liberate hydrogen ions in water, are usu. sour and corrosive, turn litmus red, and have a pH of less than 7. b any compound or atom donating protons. 2 (in general use) any sour substance.… …   Useful english dictionary

• water pollution — State resulting when substances are released into a body of water, where they become dissolved or suspended in the water or deposited on the bottom, accumulating to the extent that they overwhelm its capacity to absorb, break down, or recycle… …   Universalium

• acid —    In our context, a substance having a pH below that of neutral water (7.0) when in solution. Most metabolic waste products are acidic. Sour. See pH …   Herbal-medical glossary