Download e-book for kindle: Arsenic pollution: a global synthesis by Peter Ravenscroft

By Peter Ravenscroft

ISBN-10: 1405186011

ISBN-13: 9781405186018

ISBN-10: 140518602X

ISBN-13: 9781405186025

ISBN-10: 1444308793

ISBN-13: 9781444308792

Arsenic pollutants summarizes the most up-tp-date examine at the distribution and factors of arsenic pollutants, its effect on future health and agriculture, and strategies when it comes to water offer, remedy, and water source administration.

  • Provides the 1st international and interdisciplinary account of arsenic pollutants occurrences
  • Integrates geochemistry, hydrology, agriculture, and water offer and therapy for the 1st time
  • Options are highlighted for constructing substitute water assets and strategies for arsenic trying out and removing
  • Appeals to experts in a single self-discipline looking an outline of the paintings being performed in different disciplines

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The areas face very similar problems, and where we refer to matters of common concern, we use the term Bengal Basin, or simply Bengal where there is no geological significance. NOTES 1 It has been suggested that arsenical dyes in wallpaper were responsible for the accidental poisoning of Napoleon Bonaparte during his imprisonment on St Helena. 2 Acute poisoning follows from the ingestion of a few grams of arsenic over a short space of time, and results in life-threatening illness. Chronic poisoning results from months or years of low-level arsenic exposure, and causes no immediate suffering.

To make the statements about risk (of health consequences of ingesting arsenic) that are quoted in Chapter 5 requires an ability to quantify the associated odds. However, these risks may have wide margins for error because, for example, of the very large sample sizes required to estimate probabilities at low doses. Uncertainty, however, is a lower-order problem than both ignorance and indeterminacy. In the case of uncertainty, the parameter is known, but its value is subject to error. Ignorance, on the other hand, implies a complete lack of knowledge about the existence of a parameter (the ‘unknown unknowns’ of Donald Rumsfeld, 12 February 2003).

In mining, pollution may occur from improper disposal of wastes from sulphide-rich ores (Abrahams and Thornton, 1987; Williams, 2001). Exposed to air and rainwater, sulphides are oxidised to produce sulphate-rich, acid mine drainage (AMD) that often contains high arsenic concentrations. Arsenic-rich spoil heaps, such as from the Cornish tin-mines, have left a legacy of contaminated soil that prevents their use for food crops more than a 100 years after the mines were abandoned. Arsenic pollutes the air through the smelting of sulphide ores.

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Arsenic pollution: a global synthesis by Peter Ravenscroft

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