1、BSI Standards PublicationBS EN 12911:2013Products used for treatmentof water intended for humanconsumption ManganesegreensandBS EN 12911:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12911:2013. Itsupersedes BS EN 12911:2006 which is withdrawn.The UK part
2、icipation in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Use
3、rs are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 79925 9ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the aut
4、hority of theStandards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBS EN 12911:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12911 May 2013 ICS 71.100.80 Supersedes EN 12911:2006English Version Products used for treatment of water i
5、ntended for human consumption - Manganese greensand Produits utiliss pour le traitement de leau destine la consommation humaine - Sable vert manganis Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Mangangrnsand This European Standard was approved by CEN on 14 March 2013. CEN mem
6、bers are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on applicat
7、ion to the CEN-CENELEC 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 under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Manage
8、ment Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
9、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 B
10、russels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12911:2013: EBS EN 12911:2013EN 12911:2013 (E) 2 Contents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions and symbols 6 4 Descr
11、iption .6 4.1 Identification .6 4.1.1 Chemical name(s) 6 4.1.2 Synonym or common names 6 4.1.3 Chemical formula .6 4.1.4 CAS Registry Number .7 4.1.5 EINECS reference 7 4.2 Commercial form .7 5 Physical properties 7 5.1 Appearance 7 5.2 Particle size distribution .7 5.3 Density (bulk density loose)
12、.8 6 Chemical properties 8 7 Specific properties.8 8 Test methods 8 8.1 Sampling .8 8.2 Analysis 9 8.2.1 Particle size distribution .9 8.2.2 Bulk density loose .9 8.2.3 Mass loss at 150 C .9 8.2.4 Ignition loss at 650 C .9 8.2.5 Manganese content 10 8.2.6 Oxidation capacity 11 9 Labelling, transport
13、ation and storage 13 9.1 Means of delivery 13 9.2 Labelling according to the EU legislation 13 9.3 Transportation regulations and labelling . 13 9.4 Marking 13 9.5 Storage . 13 9.5.1 Long-term stability 13 9.5.2 Storage incompatibility 13 Annex A (informative) General information on manganese greens
14、and . 14 A.1 Origin . 14 A.1.1 Raw material 14 A.1.2 Manufacturing process 14 A.2 Typical properties . 14 A.2.1 Chemical composition . 14 A.2.2 Mechanical strength . 15 A.2.3 Density . 15 A.2.4 Porosity of particles . 15 A.3 Use . 16 BS EN 12911:2013EN 12911:2013 (E) 3 A.3.1 Function 16 A.3.2 Specif
15、ic amount . 16 A.3.3 Means of application . 16 A.3.4 Secondary effects 16 A.4 Hydraulic characteristics 16 A.4.1 Interstitial volume 16 A.4.2 Head loss in filtration 16 A.4.3 Expansion during up-flow washing . 17 A.5 Rules for safe handling and use 17 A.6 Emergency procedures . 17 A.6.1 First aid .
16、17 A.6.2 Spillage . 17 A.6.3 Fire 17 Bibliography 18 BS EN 12911:2013EN 12911:2013 (E) 4 Foreword This document (EN 12911:2013) 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 nationa
17、l standard, either by publication of an identical text or by endorsement, at the latest by November 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of paten
18、t rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12911:2006. Significant technical difference between this edition and EN 12911:2006 is as follows: Updating of subclause 9.2 in line with current legislation. Accordi
19、ng 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, G
20、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12911:2013EN 12911:2013 (E) 5 Introduction In respect of potential adverse effects on th
21、e quality of water intended for human consumption caused by the product covered by this European Standard, the following statements apply: 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. It should
22、 be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European Standard does not confer or imply acceptance or approval of the product in any
23、of the Member States of the EU or EFTA. Use of the product covered by this European Standard is subject to regulation or control by National Authorities. BS EN 12911:2013EN 12911:2013 (E) 6 1 Scope This European Standard is applicable to manganese greensand used for the treatment of water intended f
24、or human consumption. It describes the characteristics of manganese greensand and specifies the requirements and the corresponding test methods for manganese greensand. It gives information on its use in water treatment. 2 Normative references The following documents, in whole or in part, are normat
25、ively referenced in this document and are indispensable for its application. 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 fo
26、r human consumption Inorganic supporting and filtering materials Definitions EN 12902, Products used for treatment of water intended for human consumption Inorganic supporting and filtering materials Methods of test EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO
27、 3696) ISO 6333, Water quality Determination of manganese Formaldoxime spectrometric method ISO 9682-1:2009, Iron ores Determination of manganese content Part 1: Flame atomic absorption spectrometric method 3 Terms and definitions and symbols For the purposes of this document, the terms and definiti
28、ons and symbols given in EN 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical name(s) Manganese oxide coated zeolite (glauconite). NOTE The product is a preparation. 4.1.2 Synonym or common names Manganese greensand, manganese zeolite, ferro-sand, greensand. 4.1.3 Chemical formula No
29、t applicable. BS EN 12911:2013EN 12911:2013 (E) 7 4.1.4 CAS Registry Number1)Glauconite: 90387-66-9. Manganese oxide: 1313-13-9. 4.1.5 EINECS reference2)Glauconite: 291-341-6. Manganese oxide: 215-202-6. 4.2 Commercial form Manganese greensand is a granular product available in only one particle siz
30、e range. 5 Physical properties 5.1 Appearance The product comprises dry, sand-like, free flowing black granules. The particles are coated with a black manganese dioxide coating. The product has a granular shape, dense crystalline structure and a rough texture. The product shall be generally homogene
31、ous and shall be visibly free of extraneous matter. 5.2 Particle size distribution The particle size distribution shall be determined on samples taken at the point of manufacture using the test method given in EN 12902. NOTE 1 The particle size can decrease during transportation and handling. The pa
32、rticle size distribution shall be described by either: a) effective size: (d10) 0,30 mm to 0,35 mm with a maximum deviation of 0,03 mm; 1) uniformity coefficient: (U) shall be less than 1,6; 2) minimum size: (d1) shall be at least 0,25 mm; 3) maximum size: shall not exceed 1,25 mm; or b) by particle
33、 size range and by mass fraction of oversize and undersize particles. The maximum permitted mass fractions of oversize and undersize are 5 %. NOTE 2 Other values might be necessary for certain applications. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Che
34、mical Substances. BS EN 12911:2013EN 12911:2013 (E) 8 5.3 Density (bulk density loose) The bulk density loose shall be at least 1 300 kg/m3. 6 Chemical properties This European Standard specifies the minimum purity requirements for manganese greensand used for the treatment of water intended for hum
35、an 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, the user, and when necessary the relevant authorities, shall be notified. Users of this product should check the n
36、ational regulations in order 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 product not stated in this product standard. Limits have been given for imp
37、urities and chemical parameters 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 the presence of significant amounts of impurities, by-products or additives being present, the user
38、 shall be notified. The composition of the commercial product shall conform to Table 1. Table 1 Composition of commercial product Parameters Limit in mass fraction % Manganese oxides (as Mn)a0,2 to 0,8 Mass loss at 150 C max. 6 Ignition loss at 650 C max. 8 aThe manganese in the product is present a
39、s a mixture of different oxides. NOTE 1 Acid-soluble material is not a relevant parameter for this product, which is not stable to acids and which will react with hydrochloric acid releasing chlorine gas. After filling, washing and commissioning of a filter system producing drinking water, manganese
40、 greensand should not increase the concentrations of chemical parameters (see 1). NOTE 2 Water extractable substances, determined in accordance with the method for granular materials given in EN 12902, can be used to estimate the leaching of the chemicals specified in EN 12902. 7 Specific properties
41、 The oxidation capacity of manganese greensand (regenerated form), expressed as grams of Mn per litre of packed product, shall be at least 0,7 g/l. 8 Test methods 8.1 Sampling Prepare the laboratory sample(s) required by the relevant procedures described in EN 12902. BS EN 12911:2013EN 12911:2013 (E
42、) 9 8.2 Analysis 8.2.1 Particle size distribution The particle size distribution shall be determined in accordance with EN 12902. 8.2.2 Bulk density loose The bulk density loose shall be determined in accordance with EN 12902. 8.2.3 Mass loss at 150 C 8.2.3.1 General The mass loss shall be determine
43、d by the method for water content, heating to 150 C, in accordance with EN 12902. 8.2.3.2 Precision The absolute difference between two single test results, obtained under repeatability conditions, shall not exceed the repeatability limit, r, in more than one in twenty cases. 107,0 Xr =(1) where X1i
44、s the measured value. 8.2.4 Ignition loss at 650 C 8.2.4.1 Principle The sample is heated to constant mass at 650 C. It is assumed that water, including chemically bound water, is the only material present in the manganese greensand that is volatile at this temperature. At 650 C, the loss of water i
45、s practically complete. 8.2.4.2 Apparatus Ordinary laboratory apparatus and glassware together with the following. 8.2.4.2.1 Muffle furnace, capable of being controlled at (650 25) C. 8.2.4.2.2 High temperature metal or ceramic crucible with lid. 8.2.4.2.3 Desiccator. 8.2.4.2.4 Analytical balance, h
46、aving an accuracy of 0,1 mg. 8.2.4.3 Procedure Ignite the crucible and the lid (8.2.4.2.2) in the muffle furnace at (650 25) C for 1 h. Place the crucible and the lid in the desiccator; cool to room temperature and weigh to the nearest 0,1 mg. Note the mass m0. BS EN 12911:2013EN 12911:2013 (E) 10 P
47、lace a 5 g to 10 g sample of manganese greensand into the pre-ignited crucible. Close the crucible and weigh immediately to the nearest 0,5 mg (m1). Remove the lid and place the crucible and lid in the muffle furnace at (650 25) C and leave for 3 h. Place the crucible in the desiccator, cover it wit
48、h the lid and allow to cool to room temperature. When cool, weigh to the nearest 0,5 mg (m2). 8.2.4.4 Expression of results The ignition loss, X2, expressed as a percentage mass fraction of dried product, is given by the following formula: ( )( )21210100 mmXmm=(2) where m0is the mass, in grams, of t
49、he empty crucible and lid; m1is the mass, in grams, of the crucible and lid plus the sample; m2is the mass, in grams, of the crucible and lid plus the ignited sample. 8.2.4.5 Precision The absolute difference between two single test results, obtained under repeatability conditions, shall not exceed the repeatability limit, r, in more than one in twenty cases. 207,0 Xr = (3) 8.2.5 Manganese content 8.2.5.1 Principle Determination of manganese in accordance with ISO 9682-1:2009, 7.5.1.1, adopting the decomposition proce
