Analytical Approaches for Determining Chemical Oxygen Demand in Water Bodies: A Review
- 30 October 2017
- journal article
- review article
- Published by Informa UK Limited in Critical Reviews in Analytical Chemistry
- Vol. 48 (1), 47-65
- https://doi.org/10.1080/10408347.2017.1370670
Abstract
Chemical oxygen demand (COD) is a critical analytical parameter for water quality assessment. COD represents the degree of organic pollution in water bodies. However, the standard analytical methods for COD are time-consuming and possess low oxidation efficiency, chloride interference, and severe secondary pollution. Works performed during the last two decades have resulted in several technologies, including modified standard methods (e.g., microwave-assisted method) and new technologies or methods (e.g., electro- and photo-oxidative methods based on advanced oxidation processes) that are less time-consuming, environment friendly, and more reliable. This review is devoted in analyzing the technical features of the principal methods described in the literature to compare their performances (i.e., measuring window, reliability, and robustness) and identify the advantages and disadvantages of each method.Keywords
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