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Environmental chemistry involves first understanding how the uncontaminated environment works, which chemicals in what concentrations are present naturally, and with what affects. Without this it would be impossible to accurately study the affects humans have on the Environment through the release of Chemicals . CONCEPTS Environmental Chemists draw on a range of concepts from chemistry and various environmental sciences to assist in their study of what is happening to a chemical species in the Environment . Important general concepts from chemistry include understanding Chemical Reactions and Equations , Solutions , Units , Sampling , and Analytical Techniques Williams, Ian. ''Environmental Chemistry, A Modular Approach''. Wiley. 2001. ISBN 0471489425. Various environmental concepts include: Contamination A '', which is a substance that has a detrimental impact on the environment it is in [http://www.sustainabletable.org/intro/dictionary/ . Whilst a contaminant is sometimes defined as a substance present in the evironment as a result of human activity, but without harmful effects, it is sometimes the case that toxic or harmful effects from contamination only become apparent at a later date Harrison, R.M (edited by). ''Understanding Our Environment, An Introduction to Environmental Chemistry and Pollution, Third Edition''. Royal Society of Chemistry. 1999. ISBN 0854045848. The ''medium'' (e.g. soil) or organism (e.g. fish) affected by the pollutant or contaminant is called a ''receptor'', whilst a ''sink'' is a chemical medium or species that that retains and interacts with the pollutant. Environmental indicators Chemical measures of water quality include Dissolved Oxygen (DO) , Chemical Oxygen Demand (COD) , Biological Oxygen Demand (BOD) , and PH . |
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