Analytical Approaches for Determining Chemical Oxygen Demand in Water Bodies: A Review

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 se...

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Bibliographic Details
Published in:Critical reviews in analytical chemistry 2018-01, Vol.48 (1), p.47-65
Main Authors: Li, Ji, Luo, Guobing, He, LingJun, Xu, Jing, Lyu, Jinze
Format: Article
Language:English
Subjects:
Advanced oxidation processes
Analytical methods
assessment methods
Chemical oxygen demand
Mathematical analysis
New technology
organic pollution
Oxidation
Pollution
Quality assessment
Quality control
water
Water pollution
Water quality
Water quality assessments
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Summary: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.
ISSN:1040-8347
1547-6510
DOI:10.1080/10408347.2017.1370670