SIST EN 17120:2019

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Photokatalyse - Wasserreinigung - Verhalten von photokatalytischen Werkstoffen durch Messung der Verminderung von PhenolPhotocatalyse - Purification de l'eau - Évaluation des performances des matériaux photocatalytiques par mesurage de la dégradation du phénolPhotocatalysis - Water purification - Performance of photocatalytic materials by measurement of phenol degradation25.220.20Površinska obdelavaSurface treatmentICS:Ta slovenski standard je istoveten z:EN 17120:2019SIST EN 17120:2019en,fr,de01-maj-2019SIST EN 17120:2019SLOVENSKI
STANDARD



SIST EN 17120:2019



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 17120
February
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t wä t t rä t r English Version
Photocatalysis æ Water purification æ Performance of photocatalytic materials by measurement of phenol degradation Photocatalyse æ Purification de l 5eau æ Évaluation des performances des matériaux photocatalytiques par mesurage de la dégradation du phénol
Photokatalyse æ Wasserreinigung æ Leistungsbewertung von photokatalytischen Werkstoffen durch Messung des Phenolabbaus This European Standard was approved by CEN on
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egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y s t rã t r s { ESIST EN 17120:2019



EN 17120:2019 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Abbreviations . 5 5 Principle . 5 6 Interferences . 5 7 Equipment and materials . 6 7.1 Irradiation system and photo-reactor . 6 7.2 HPLC analysis apparatus . 7 7.3 TOC analyser (optional) . 7 7.4 Other Equipment and materials . 7 7.5 Photocatalytic reference material . 7 8 Test method procedure . 8 9 Reporting of results . 9 Annex A (informative) Results of round-robin test . 10 Bibliography . 12 SIST EN 17120:2019



EN 17120:2019 (E) 3 European foreword This document (EN 17120:2019) has been prepared by Technical Committee CEN/TC 386 “Photocatalysis”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2019, and conflicting national standards shall be withdrawn at the latest by August 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 17120:2019



EN 17120:2019 (E) 4 1 Scope This document describes a test method to evaluate the performance of photocatalytic materials in water purification by measuring phenol degradation. This test method is applicable to photocatalytic materials in form of powders (suspensions in water, slurries) under UV irradiation. The photocatalytic performance of the tested material is assessed by the observed rate of phenol degradation at specified experimental conditions as determined by HPLC. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1484:1997, Water analysis - Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) CEN/TS 16599:2014, Photocatalysis — Irradiation conditions for testing photocatalytic properties of semiconducting materials and the measurement of these conditions ISO 8245:1999, Water quality – Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: http://www.electropedia.org/ISO Online browsing platformã available at http://www.iso.org/obp3.1 photocatalyst catalyst able to produce, upon absorption of light, chemical transformations of the reaction partners Note 1 to entry: The excited state of the photocatalyst repeatedly interacts with the reaction partners forming reaction intermediates and regenerates itself after each cycle of such interactions. 3.2 photocatalytic materials materials in which or on which the photocatalyst is added by coating, impregnation, mixing, etc. 3.3 water purification purification by decomposing contaminants contained in water SIST EN 17120:2019



EN 17120:2019 (E) 5 4 Abbreviations For the purposes of this document, the following abbreviations apply. UV Ultra Violet HPLC High Performance Liquid Chromatography TOC Total Organic Carbon DOC Dissolved Organic Carbon 5 Principle A test solution is prepared by suspending a given amount of the material to be tested in water with the addition of a certain amount of phenol. The test solution is irradiated with UV in a batch photo-reactor under controlled conditions. The concentration of phenol is measured against irradiation time by HPLC with UV detection. The photocatalytic performance of the material is assessed by the observed rate of phenol degradation. Additional information regarding mineralization of phenol can be obtained by measuring the decrease of organic carbon (TOC or DOC) during the photocatalytic process (optional). 6 Interferences The laboratories carrying out this test shall perform tests for possible interferences in the chromatographic system for measurement of phenol (HPLC) and in the TOC/DOC analyser (where applied). The laboratories shall document the absence of significant interferences that could affect the measurements of phenol/TOC/DOC. SIST EN 17120:2019



EN 17120:2019 (E) 6 7 Equipment and materials 7.1 Irradiation system and photo-reactor The irradiation system arrangement is shown in Figure 1.
Key A stirrer B photo-reactor cell (D = 5cm, V = 100ml) C light source D water cooler Figure 1 — Irradiation system arrangement (light source and stirrer positions can be reversed) A batch-type cylindrical photo-reactor cell made of pyrex glass, 5 cm in diameter and 100 ml volume with ability for magnetic or mechanical stirring is used. The temperature of the irradiated solution shall be measured and recorded inside the reactor during the test and should be kept within 25 ± 5 °C. The irradiation source shall consist of any lamp able to excite the ph
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