sulphur dioxide

/sʌlfə daɪˈɒksaɪd / (say sulfuh duy'oksuyd)

noun
a colourless gas or liquid with a strong pungent odour which is non-combustible and is soluble in water, ether and alcohol; it is used as an oxidising and reducing agent, and for various industrial uses; when dissolved in water it gives sulphurous acid.
Also, sulfur dioxide.
Ninety-nine per cent of sulphur dioxide in air is caused by human activity in which sulphur is burnt creating an oxide. The gas is one of the air pollutants that can affect human health and cause acid rain. However, in Australia, it is generally at an acceptably low level in urban areas. Sulphur dioxide is most commonly produced in the processing of materials such as coal, oil and gas for the generation of electricity. It is also present in vehicle emissions. However implementation of fuel quality standards in Australia has successively reduced the contribution of sulphur dioxide from this source. Leaded petrol was phased out in 2002. The sulphur content in diesel in 1999 was 1300 parts per million, down to 10 parts per million in 2009. ABS statistics for 2009 showed the percentage of sulphur dioxide due to vehicle exhausts was very small (between 1 and 2 per cent). The main source of sulphur dioxide emissions was industrial activity including copper, lead, zinc, nickel and silver processing.

Australian English dictionary. 2014.

Look at other dictionaries:

  • Sulphur dioxide — Sulphur Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast… …   The Collaborative International Dictionary of English

  • sulphur dioxide — sulphur dioxide. См. сернистый ангидрид. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • sulphur dioxide — noun a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain • Syn: ↑sulfur dioxide • Hypernyms: ↑dioxide, ↑gas, ↑pollutant * * * sulphur… …   Useful english dictionary

  • sulphur dioxide — sulphur di oxide BrE sulfur dioxide AmE n [U] a poisonous gas that is a cause of air ↑pollution in industrial areas …   Dictionary of contemporary English

  • sulphur dioxide — noun Chemistry a colourless pungent toxic gas formed by burning sulphur. [SO2.] …   English new terms dictionary

  • sulphur dioxide — BrE, sulfur dioxide AmE noun (U) a poisonous gas that is a cause of air pollution in industrial areas …   Longman dictionary of contemporary English

  • sulphur dioxide — colorless gas used for many industrial and agricultural purposes …   English contemporary dictionary

  • sulphur dioxide — UK [ˌsʌlfə(r) daɪˈɒksaɪd] / US [ˌsʌlfər daɪˈɑkˌsaɪd] noun [uncountable] chemistry a poisonous gas with a strong smell, used in industry and often a cause of air pollution …   English dictionary

  • sulphur dioxide — [ˌsʌlfə daɪˈɒksaɪd] noun [U] science a poisonous gas with a strong smell …   Dictionary for writing and speaking English

  • Sulphur — Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds… …   The Collaborative International Dictionary of English

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