1、July 2009DEUTSCHE NORM English price group 10No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 71.100.80!$XkF“1537235www
2、.din.deDDIN EN 12903Products used for the treatment of water intended for humanconsumption Powdered activated carbonEnglish version of DIN EN 12903:2009-07Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Pulver-AktivkohleEnglische Fassung DIN EN 12903:2009-07SupersedesDIN EN 12903:2
3、003-08www.beuth.deDocument comprises pages16DIN EN 12903:2009-07 National foreword This standard has been prepared by Technical Committee CEN/TC 164 “Water supply” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practic
4、e Standards Committee), Technical Committee NA 119-04-02 AA Wasseraufbereitung. Users of this standard are advised of the reservations stated in the Introduction of the European Standard and should note that national regulations exist in Germany dealing with water for human consumption, in particula
5、r the Trinkwasserverordnung (TrinkwV2001) (German Drinking Water Ordinance). Amendments This standard differs from DIN EN 12903:2003-08 as follows: a) General purity criteria have been given in more detail. b) Information on RID/ADR classification has been updated. c) Specifications relating to the
6、dosing of powdered activated carbon have been rendered more precise. d) The bibliography has been updated. Previous editions DIN EN 12903: 1999-11, 2003-08 DIN 19603: 1956-03, 1969-05 National Annex NA (informative) Bibliography Verordnung zur Novellierung der Trinkwasserverordnung (German Regulatio
7、n amending the German Drinking Water Regulation), as of 21 May 2001, BGBl. (German Federal Law Gazette) I (2001), No. 24, pp. 959-9801)1)Registered in the DITR database of DIN Software GmbH, obtainable from: Beuth Verlag GmbH, 10772 Berlin. 2 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12903Ma
8、rch 2009ICS 71.100.80 Supersedes EN 12903:2003 English VersionProducts used for the treatment of water intended for humanconsumption - Powdered activated carbonProduits utiliss pour le traitement de leau destine laconsommation humaine - Charbon actif en poudreProdukte zur Aufbereitung von Wasser fr
9、denmenschlichen Gebrauch - Pulver-AktivkohleThis European Standard was approved by CEN on 9 February 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration
10、. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
11、under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece,
12、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centr
13、e: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12903:2009: EEN 12903:2009 (E) 2 Contents Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms and definitions . 54 Description .
14、 54.1 Identification . 54.2 Commercial form . 65 Physical properties 65.1 Appearance 65.2 Particle size distribution . 65.3 Bulk density packed 66 Chemical properties 66.1 General 66.2 Purity criteria 67 Specific properties. 88 Test methods 88.1 Sampling . 88.2 Analysis 89 Labelling, transportation
15、and storage . 99.1 Means of delivery . 99.2 Risk and safety labelling according to the EU directives . 99.3 Transportation regulations and labelling 109.4 Marking . 109.5 Storage 10Annex A (informative) General information on powdered activated carbon . 11A.1 Origin 11A.2 Properties . 11A.3 Use 12A.
16、4 Rules for safe handling and use 13A.5 Emergency procedures . 13Bibliography 14DIN EN 12903:2009-07 EN 12903:2009 (E) 3 Foreword This document (EN 12903:2009) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall
17、be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. Attention is drawn to the possibility that some of the elements of this do
18、cument may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12903:2003. Differences between this edition and EN 12903:2003 are editorial to harmonize the text with other standards in this seri
19、es. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungar
20、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12903:2009-07 EN 12903:2009 (E) 4 Introduction In respect of potential adverse effects on the quality of wat
21、er intended for human consumption, caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adopti
22、on of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this standard does not confer or imply acceptance or approval of the product in any of the Member States of the EU or EFTA. The use of
23、 the product covered by this European Standard is subject to regulation or control by National Authorities. DIN EN 12903:2009-07 EN 12903:2009 (E) 5 1 Scope This European Standard is applicable to powdered activated carbon used for treatment of water intended for human consumption. It describes the
24、characteristics of powdered activated carbon and specifies the requirements and the corresponding test methods for powdered activated carbon. It gives information on its use in water treatment. 2 Normative references The following referenced documents are indispensable for the application of this do
25、cument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12901:1999, Products used for treatment of water intended for human consumption - Inorganic supporting and filtering materials De
26、finitions EN 12902, Products used for treatment of water intended for human consumption - Inorganic supporting and filtering materials - Methods of test EN ISO 787-11, General methods of test for pigments and extenders - Part 11: Determination of tamped volume and apparent density after tamping (ISO
27、 787-11:1981) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical name(s) Carbon. 4.1.2 Synonym or common names Activated coal, activated charcoal, active carbon. 4.1.3 Chemical formula C (
28、elementary). 4.1.4 CAS Registry Number 1)7440-44-0. 4.1.5 EINECS reference 2)231-153-3. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. DIN EN 12903:2009-07 EN 12903:2009 (E) 6 4.2 Commercial form Powdered activated carbon is available
29、 in many grades, differing in adsorption characteristics, porosity, particle size and purity. 5 Physical properties 5.1 Appearance The product is a black powder. 5.2 Particle size distribution 5.2.1 Particle size At least a mass fraction of 95 % shall have a particle size less than 150 m. NOTE Other
30、 values can be necessary for certain applications. The particle size distribution is commonly specified as a mass fraction of 95 % less than a given particle size. The particle size distribution shall be within the manufacturers declared values. 5.2.2 Oversize and undersize particles The proportion
31、of oversize and undersize particles shall be within the manufacturers declared values. 5.3 Bulk density packed The bulk density packed shall be within 10 % of the value specified by the manufacturer or supplier. NOTE The bulk density packed of powdered activated carbon is typically in the range 200
32、kg/m3to 750 kg/m3. 6 Chemical properties 6.1 General Powdered activated carbon is manufactured by controlled oxidation, by means of steam or chemicals, from carbonaceous raw materials including coconut, wood, peat or coal. The raw materials shall be stated by the manufacturer. High internal porosity
33、 results in adsorptive properties and, depending on the raw material and the manufacturing process, it can have acid or basic properties. It is a reducing agent with catalytic properties. Activated carbon can react with oxidants to form carbon dioxide. The carbon content of the commercial product do
34、es not affect adsorption characteristics. 6.2 Purity criteria 6.2.1 General This European Standard specifies the minimum purity requirements for powdered activated carbon used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product.
35、Depending on the raw material and the manufacturing process, other impurities may be present and, if so, this shall be notified to the user and, when necessary, to the relevant authorities. DIN EN 12903:2009-07 EN 12903:2009 (E) 7 NOTE Users of this product should check the national regulations in o
36、rder to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, contents of other impurities and additives used in the products not stated in the product standard. Limits have been given for impurities and chemical par
37、ameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user. 6.2.2 Imp
38、urities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 - Main impurities and by-products Impurity Limita)in mass fraction % Ash b)max. 15Water c)(at the time of packing) d)max. 5 Water-soluble material max. 3 Zinc max. 0,002a)Expressed on a dry basis
39、 except for water content. b)Some products incorporate minerals to reduce dust formation; for such products a higher limit for ash might be necessary.c)Certain applications require a higher water content to avoid dust formation; for such products a higher limit might be necessary.d)The water content
40、 can increase after packing; e.g. during transportation.DIN EN 12903:2009-07 EN 12903:2009 (E) 8 6.2.3 Water-extractable substances The product shall conform to the requirements specified in Table 2. Table 2 Water-extractable substances Substance Limit of product (dry basis) mg/kg Arsenic (As) max.
41、10 Cadmium (Cd) max. 5 Chromium (Cr) max. 50 Mercury (Hg) max. 1 Nickel (Ni) max. 20 Lead (Pb) max. 10 Antimony (Sb) max. 5 Selenium (Se) max. 10 Cyanide (CN) max. 50 PAH a)max. 0,2 a)Polycyclic Aromatic Hydrocarbons: the sum of the detected concentrations of fluoranthene, benzo(b)fluoranthene, benz
42、o(k)fluoranthene, benzo(a)pyrene, benzo(ghi)perylene, indeno(1,2,3-cd)pyrene. 7 Specific properties The iodine number of the powdered activated carbon shall be not less than 600 mg/g. NOTE In certain applications lower values are acceptable. 8 Test methods 8.1 Sampling Prepare the laboratory sample(
43、s) required by the relevant procedures described in EN 12902. 8.2 Analysis 8.2.1 Particle size distribution The particle size distribution shall be determined in accordance with EN 12902. DIN EN 12903:2009-07 EN 12903:2009 (E) 9 8.2.2 Bulk density packed 8.2.2.1 Apparatus Drying oven capable of bein
44、g controlled at (150 5) C. 8.2.2.2 Procedure Dry a sample of powdered activated carbon to constant mass at (150 5) C. Determine the bulk density packed in accordance with the method for apparent density after tamping described in EN ISO 787-11. 8.2.3 Ash The ash shall be determined in accordance wit
45、h EN 12902. 8.2.4 Water content The water content shall be determined in accordance with EN 12902, drying the sample at 150 C. 8.2.5 Water-soluble material The content of water-soluble material shall be determined in accordance with EN 12902. 8.2.6 Content of zinc The content of zinc shall be determ
46、ined in accordance with EN 12902. 8.2.7 Water-extractable substances The content of water-extractable substances shall be determined in accordance with the method for powders in EN 12902. 8.2.8 Iodine number The iodine number shall be determined in accordance with EN 12902. 9 Labelling, transportati
47、on and storage 9.1 Means of delivery Powdered activated carbon shall be delivered in paper sacks (10 kg to 25 kg), semi-bulk containers (polypropylene bags, metal or cardboard drums, or corrugated boxes containing 200 kg to 800 kg), or in bulk (up to 50 m3). In order that the purity of the product i
48、s not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. NOTE Local regulations could apply to electrical earthing of containers during transfer operations, to prevent discharge of static elec
49、tricity. 9.2 Risk and safety labelling according to the EU directives 3)At the date of publication of this European Standard, powdered activated carbon was not listed as a dangerous substance. 3) See 1. DIN EN 12903:2009-07 EN 12903:2009 (E) 10 NOTE Annex I of the Directive 67/548/EEC on Classification, packaging and labelling of dangerous substances and its amendments and adaptations in the European Union contains a list of substance
