1、BS EN 12903:2009ICS 13.060.20; 71.100.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDProducts used forthe treatment ofwater intended forhuman consumption Powdered activatedcarbonThis British Standardwas published under theauthority of the StandardsPolicy and
2、StrategyCommittee on 30 June2009. BSI 2009ISBN 978 0 580 63248 8Amendments/corrigenda issued since publicationDate CommentsBS EN 12903:2009National forewordThis British Standard is the UK implementation of EN 12903:2009. Itsupersedes BS EN 12903:2003 which is withdrawn.The UK participation in its pr
3、eparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible
4、for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 12903:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 12903March 2009ICS 71.100.80 Supersedes EN 12903:2003 English VersionProducts used for the treatment of water intended for hum
5、anconsumption - Powdered activated carbonProduits utiliss pour le traitement de leau destine laconsommation humaine - Charbon actif en poudreProdukte zur Aufbereitung von Wasser fr denmenschlichen Gebrauch - Pulver-AktivkohleThis European Standard was approved by CEN on 9 February 2009.CEN members a
6、re 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. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to t
7、he 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same s
8、tatus as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania,
9、 Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide
10、 for CEN national Members.Ref. No. EN 12903:2009: EBS EN 12903:2009EN 12903:2009 (E) 2 Contents Foreword 3Introduction . 41 Scope 52 Normative references 53 Terms and definitions . 54 Description . 54.1 Identification . 54.2 Commercial form . 65 Physical properties 65.1 Appearance 65.2 Particle size
11、 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 and storage . 99.1 Means of delivery . 99.2 Risk and safety labelling according to the EU directives .
12、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.4 Rules for safe handling and use 13A.5 Emergency procedures . 13Bibliography 14BS EN 12903:2009EN 1290
13、3:2009 (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 be given the status of a national standard, either by publication of an identical text or by endorsement, at
14、 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 document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying
15、 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 series. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organi
16、zations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Rom
17、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12903:2009EN 12903:2009 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European Stan
18、dard 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 adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics o
19、f 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 the product covered by this European Standard is subject to regulation or control by National Authorities. BS EN
20、 12903:2009EN 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 characteristics of powdered activated carbon and specifies the requirements and the corresponding test methods for pow
21、dered 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 document. For dated references, only the edition cited applies. For undated references, the latest edition of the refere
22、nced document (including any amendments) applies. EN 12901:1999, Products used for treatment of water intended for human consumption - Inorganic supporting and filtering materials Definitions EN 12902, Products used for treatment of water intended for human consumption - Inorganic supporting and fil
23、tering 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 787-11:1981) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12901:1
24、999 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 (elementary). 4.1.4 CAS Registry Number 1)7440-44-0. 4.1.5 EINECS reference 2)231-153-3. 1) Chemical Abstracts Service
25、Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. BS EN 12903:2009EN 12903:2009 (E) 6 4.2 Commercial form Powdered activated carbon is available in many grades, differing in adsorption characteristics, porosity, particle size and purity. 5 Physical properties 5.1 App
26、earance 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 values can be necessary for certain applications. The particle size distribution is commonly specified as a mass fraction
27、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 of oversize and undersize particles shall be within the manufacturers declared values. 5.3 Bulk density packed The bulk den
28、sity 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 kg/m3to 750 kg/m3. 6 Chemical properties 6.1 General Powdered activated carbon is manufactured by controlled oxidation, by
29、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 results in adsorptive properties and, depending on the raw material and the manufacturing process, it can have acid or bas
30、ic 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 does not affect adsorption characteristics. 6.2 Purity criteria 6.2.1 General This European Standard specifies the minimum pu
31、rity 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. Depending on the raw material and the manufacturing process, other impurities may be present and, if so, this shall be noti
32、fied to the user and, when necessary, to the relevant authorities. BS EN 12903:2009EN 12903:2009 (E) 7 NOTE Users of this product should check the national regulations in order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account r
33、aw 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 parameters where these are likely to be present in significant quantities from the current production process and raw materials. If
34、 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 Impurities and main by-products The product shall conform to the requirements specified in Table 1. Table 1 - Main impurities and b
35、y-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 except for water content. b)Some products incorporate minerals to reduce dust formation; for such products a higher limit for a
36、sh 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 can increase after packing; e.g. during transportation.BS EN 12903:2009EN 12903:2009 (E) 8 6.2.3 Water-extractable substances T
37、he 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. 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
38、(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, benzo(k)fluoranthene, benzo(a)pyrene, benzo(ghi)perylene, indeno(1,2,3-cd)pyrene. 7 Specific properties The iodine number of the powdered
39、 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(s) required by the relevant procedures described in EN 12902. 8.2 Analysis 8.2.1 Particle size distribution The particle size distrib
40、ution shall be determined in accordance with EN 12902. BS EN 12903:2009EN 12903:2009 (E) 9 8.2.2 Bulk density packed 8.2.2.1 Apparatus Drying oven capable of being 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 d
41、ensity 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 with 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
42、-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 determined in accordance with EN 12902. 8.2.7 Water-extractable substances The content of water-extractable substances shall be determined in ac
43、cordance 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, transportation and storage 9.1 Means of delivery Powdered activated carbon shall be delivered in paper sacks (10 kg to 25 kg), semi-bulk containers (p
44、olypropylene 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 is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleane
45、d and prepared before use. NOTE Local regulations could apply to electrical earthing of containers during transfer operations, to prevent discharge of static electricity. 9.2 Risk and safety labelling according to the EU directives 3)At the date of publication of this European Standard, powdered act
46、ivated carbon was not listed as a dangerous substance. 3) See 1. BS EN 12903:2009EN 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 substances cla
47、ssified by the EU. Substances not in this Annex I should be classified on the basis of their intrinsic properties according to the criteria in the Directive by the person responsible for the marketing of the substance. 9.3 Transportation regulations and labelling At the date of publication of this E
48、uropean Standard, steam activated carbon was not a dangerous cargo. Chemically activated carbon is listed as: UN 4)Number: 1362; RID 5)/ADR 6): Class 4.2, S2, PGIII; IMDG 7): Class 4.2; IATA 8): Prohibited. 9.4 Marking The marking shall include the following: the name “Powdered activated carbon“, tr
49、ade name and grade; the net mass; the name and the address of the supplier and/or manufacturer; the statement “this product conforms to EN 12903“. 9.5 Storage 9.5.1 Long term stability The product is stable but hygroscopic. It can be stored for an unlimited time if kept dry and away from volatile materials. 9.5.2 Storage incompatibilities The product shall be kept away from oxidants (e.g. hydrogen peroxide, potassium perma
