ASTM D8084-2017 1875 Standard Test Method for Photoelectrochemical Oxygen Demand of Freshwater Sources for Drinking Water Treatment Plants and Treated Drinking Water《饮用水处理厂和经处理的饮用水.pdf

《ASTM D8084-2017 1875 Standard Test Method for Photoelectrochemical Oxygen Demand of Freshwater Sources for Drinking Water Treatment Plants and Treated Drinking Water《饮用水处理厂和经处理的饮用水.pdf》由会员分享，可在线阅读，更多相关《ASTM D8084-2017 1875 Standard Test Method for Photoelectrochemical Oxygen Demand of Freshwater Sources for Drinking Water Treatment Plants and Treated Drinking Water《饮用水处理厂和经处理的饮用水.pdf（9页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: D8084 17Standard Test Method forPhotoelectrochemical Oxygen Demand of FreshwaterSources for Drinking Water Treatment Plants and TreatedDrinking Water1This standard is issued under the fixed designation D8084; the number immediately following the designation indicates the year oforiginal

2、 adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a protocol for the determinationof the phot

3、oelectrochemical oxygen demand of freshwatersources for drinking water treatment plants and treated drink-ing water in the range of 0.7 mg/L to 20 mg/L. Higher levelsmay be determined by sample dilution.1.2 Photoelectrochemical oxygen demand is determinedusing the current generated from the photoele

4、ctrochemicaloxidation of the sample using titanium dioxide (TiO2) irradi-ated with ultraviolet (UV) light from a light-emitting diode(LED).1.3 This test method does not require the use of thehazardous reagents, such as mercuric sulfate, potassium di-chromate and silver sulfate, that are often associ

5、ated with thedetermination of chemical oxygen demand (that is, Test Meth-ods D1252). It can also provide a result rapidly, as samples donot require reflux.1.4 Determination of photoelectrochemical oxygen demandin freshwater sources for drinking water treatment plants andtreated drinking water matric

6、es has important implications forassessing treatment efficacy. Photoelectrochemical oxygen de-mand can be used as a bulk surrogate measure of naturalorganic matter, a key target for drinking water treatment. Inaerobic biological treatment processes, determination of pho-toelectrochemical oxygen dema

7、nd can provide an estimation ofthe oxygen required by microorganisms to degrade organicmatter. This test method is complementary to existing naturalorganic matter (NOM) monitoring techniques and will helpscientists and engineers further the understanding of NOM inwater with a rapid oxygen demand tes

8、t.1.5 This test method was used successfully with reagentgrade water spiked with pure compounds, freshwater sourcesfor drinking water treatment plants and treated drinking water.It is the users responsibility to ensure the validity of this testmethod for waters of untested matrices.1.6 This test met

9、hod is applicable to oxidizable matter, 90 % of a 20 A baselineOutput from the UV LED during referenceoxidation50 mAUV wavelength 365 nmD8084 178ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of

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