Portable Analyzer for On-Site Determination of Dissolved Organic Carbon—Development and Field Testing
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2018-10-23 |
| Journal | International Journal of Environmental Research and Public Health |
| Authors | Heinrich Glorian, Viktor Schmalz, Paweł Lochyński, Paul Fremdling, Hilmar Börnick |
| Institutions | Wrocław University of Environmental and Life Sciences, Institute of Environmental Engineering |
| Citations | 4 |
Abstract
Section titled “Abstract”Dissolved organic carbon (DOC) is a sum parameter that is frequently used in water analytics. Highly resolved and accurate DOC data are necessary, for instance, for water quality monitoring and for the evaluation of the efficiency of treatment processes. The conventional DOC determination methods consist of on-site sampling and subsequent analysis in a stationary device in a laboratory. However, especially in regions where no or only poorly equipped laboratories are available, this method bears the risk of getting erroneous results. For this reason, the objective of the present study was to set up a reliable and portable DOC analyzer for on-site analysis. The presented DOC system is equipped with an electrolysis-based decomposition cell with boron-doped diamond electrodes (BDD) that oxidizes the organic compounds to carbon dioxide. Within this study, the influence of different electrode materials and the composition of the applied electrolytes on the DOC decomposition in an undivided electrolytic cell were systematically investigated. Furthermore, some technical aspects of the portable prototype are discussed. After a detailed validation, the prototype was used in an ongoing monitoring program in Northern India. The limit of detection is 0.1 mg L−1 C with a relative standard deviation of 2.3% in a linear range up to 1000 mg L C−1. The key features of the portable DOC analyzer are: No need for ultra-pure gases, catalysts or burning technology, an analyzing time per sample below 5 min, and a reliable on-site DOC determination.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2005 - Organic carbons and TOC in waters: An overview of the international norm for its measurements [Crossref]
- 2013 - Degradation of bisphenol A in aqueous solution by a novel electro/Fe3+/peroxydisulfate process [Crossref]
- 2001 - Total organic carbon analyzers as tools for measuring carbonaceous matter in natural waters [Crossref]
- 2014 - Application of high-resolution spectral absorbance measurements to determine dissolved organic carbon concentration in remote areas [Crossref]
- 1998 - Development of an ICP−IDMS method for dissolved organic carbon determinations and its application to chromatographic fractions of heavy metal complexes with humic substances [Crossref]
- 2007 - Uncertainty of the result of TOC determination in water samples [Crossref]
- 1994 - Electrocatalysis in the electrochemical conversion/combustion of organic pollutants for waste water treatment [Crossref]
- 2003 - High-performance Ti/BDD electrodes for pollutant oxidation [Crossref]
- 2006 - Electrochemical incineration of chloromethylphenoxy herbicides in acid medium by anodic oxidation with boron-doped diamond electrode [Crossref]