1、BS EN 13754:2009ICS 13.060.20; 71.100.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDProducts used fortreatment of waterintended for humanconsumption BentoniteThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee o
2、n 30 June2009. BSI 2009ISBN 978 0 580 63246 4Amendments/corrigenda issued since publicationDate CommentsBS EN 13754:2009National forewordThis British Standard is the UK implementation of EN 13754:2009. Itsupersedes BS EN 13754:2003 which is withdrawn.The UK participation in its preparation was entru
3、sted 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 for its correct app
4、lication.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13754:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13754March 2009ICS 71.100.80 Supersedes EN 13754:2003 English VersionProducts used for treatment of water intended for humanconsumption - Bentoni
5、teProduits utiliss pour le traitement de leau destine laconsommation humaine - BentoniteProdukte zur Aufbereitung von Wasser fr denmenschlichen Gebrauch - BentonitThis European Standard was approved by CEN on 1 February 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations w
6、hich 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 the CEN Management Centre or to any CEN member.This European St
7、andard 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 status as theofficial versions.CEN members are the national sta
8、ndards 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, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kin
9、gdom.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 for CEN national Members.Ref. No. EN 13754:2009: EBS EN 13754
10、:2009EN 13754:2009 (E) 2 Contents Foreword 3 1 Scope 5 2 Normative references 5 3 Terms, definitions and symbols . 5 4 Description . 5 4.1 Identification . 5 4.2 Commercial form . 6 5 Physical properties 6 5.1 Appearance 6 5.2 Particle size distribution . 6 5.3 Bulk density packed 6 6 Chemical prope
11、rties 6 6.1 General 6 6.2 Impurities and main by-products . 6 7 Test methods 7 7.1 Sampling . 7 7.2 Analysis 7 8 Labelling, transportation and storage . 7 8.1 Means of delivery . 7 8.2 Risk and safety labelling according to EU directives . 8 8.3 Transportation regulations and labelling 8 8.4 Marking
12、 . 8 8.5 Storage 8 Annex A (informative) General information on bentonite . 9 Bibliography 11 BS EN 13754:2009EN 13754:2009 (E) 3 Foreword This document (EN 13754:2009) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standa
13、rd shall 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 o
14、f this document 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 13754:2003. Differences between this edition and EN 13754:2003 are editorial to harmonize the text with other standards in
15、this series. 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, Greec
16、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 13754:2009EN 13754:2009 (E) 4 Introduction In respect of potential adverse effects on the quality of
17、 water intended for human consumption, caused by the product covered by this standard: a) this 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 adoption of verifiab
18、le 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 the product c
19、overed by this European Standard is subject to regulation or control by National Authorities. BS EN 13754:2009EN 13754:2009 (E) 5 1 Scope This European Standard is applicable to bentonite used for treatment of water intended for human consumption. It describes the characteristics of bentonite and sp
20、ecifies the requirements and the corresponding test methods for bentonite. 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 u
21、ndated references, the latest edition of the referenced document (including any amendments) applies. EN 12485, Chemicals used for treatment of water intended for human consumption- Calcium carbonate, high-calcium lime and half-burnt dolomite - Test methods EN 12901:1999, Products used for treatment
22、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 filtering materials - Methods of test 3 Terms, definitions and symbols For the purposes of this
23、document, the terms, definitions and symbols given in EN 12901:1999 apply. 4 Description 4.1 Identification 4.1.1 Chemical name Not applicable. 4.1.2 Synonym or common names Montmorillonite, Bentonite, Amargosite, Ardmorite, Askanite, Confolensite, Erinite, Galapectite, Malthacite, Samote, Steargili
24、te, Stolpenite, Wilkonite. Montmorillonite and bentonite are the most commonly used names. 4.1.3 Chemical formula Si4Al2-xM(II)xM(I)x+O10(OH)2. nH2O, where x varies from 0 to 2. The divalent metal M(II) can be replaced completely or partly by monovalent metal M(I) so as to maintain electrical charge
25、 equilibrium. 4.1.4 CASRegistry Number 1)1302-78-9. 1) Chemical Abstracts Service Registry Number. BS EN 13754:2009EN 13754:2009 (E) 6 4.1.5 EINECS Reference 2)215-108-5. 4.2 Commercial form The product is available in powder form in many grades differing in purity and monovalent ion (Na+) concentra
26、tion. 5 Physical properties 5.1 Appearance The product is a white to light brown or green powder. 5.2 Particle size distribution At least a mass fraction of 95 % of the product shall have a particle size less than 500 m. NOTE The particle size distribution is commonly specified as a given mass fract
27、ion less than a given particle size. The particle size distribution shall be within the manufacturers declared values. 5.3 Bulk density packed The bulk density packed shall be in the range 800 kg/m3to 1 000 kg/m3. 6 Chemical properties 6.1 General This European Standard specifies the minimum purity
28、requirements for bentonite 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 notified to the user and
29、when necessary to relevant authorities. 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 raw water quality, contents of other impurities and additives us
30、ed in the products not stated in the product standard. Limits have been given for impurities 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,
31、by-products or additives being present, this shall be notified to the user. 6.2 Impurities and main by-products The composition of the commercial product shall conform to Table 1. 2) European Inventory of Existing Commercial Chemical Substances. BS EN 13754:2009EN 13754:2009 (E) 7 Table 1 Compositio
32、n of commercial product Limit as a mass fraction in % of the product Parameter Minimum Maximum SiO250 70 Al2O310 20MgO 1 4,5 CaO 0,5 4 Na2O 0,5 3 Mass loss at 105 C 0 15 NOTE 1 When used in treatment to produce drinking water, bentonite should not increase the concentrations of chemical parameters a
33、bove the regulated values (see 1). NOTE 2 Water extractable substances, determined in accordance with the method for powders given in EN 12902, can be used to estimate the leaching of the chemicals specified in EN 12902. 7 Test methods 7.1 Sampling Prepare the laboratory sample(s) required by the re
34、levant procedures described in EN 12902. 7.2 Analysis 7.2.1 Particle size distribution The particle size distribution shall be determined in accordance with EN 12902. 7.2.2 Bulk density packed The bulk density packed shall be determined in accordance with EN 12902. 7.2.3 Chemical analysis The conten
35、t of SiO2shall be determined in accordance with EN 12902. The content of Al2O3, CaO, Na2O and MgO shall be determined in accordance with EN 12485. 7.2.4 Mass loss at 105 C The mass loss shall be determined by the method for water content, heating to 105 C, in accordance with EN 12902. 8 Labelling, t
36、ransportation and storage 8.1 Means of delivery Bentonite shall be delivered in bags, big bags and bulk. BS EN 13754:2009EN 13754:2009 (E) 8 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 b
37、een specially cleaned and prepared before use. 8.2 Risk and safety labelling according to EU directives 3)Bentonite is not listed as a dangerous substance. NOTE Annex I of the Directive 67/548/EEC on Classification, packaging and labelling of dangerous substances and its amendments and adaptations i
38、n the European Union contains a list of substances classified 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. 8.3 Transportation regulati
39、ons and labelling Bentonite is not classified as dangerous for transportation by road, rail, sea or air. Bentonite is not listed under a UN number 4). No special labelling is required. 8.4 Marking The marking shall include the following: the name “bentonite“, trade name and grade; the net mass; the
40、name and the address of the supplier and/or manufacturer; the statement “This product conforms to EN 13754“. 8.5 Storage 8.5.1 Long-term stability The product is stable but hygroscopic. The product can be stored for one or two years if kept dry and away from volatile materials which can adsorb on th
41、e bentonite. 8.5.2 Storage incompatibilities Keep away from volatile solvents, odorous products and moisture. 3) See 2. 4) United Nations number. BS EN 13754:2009EN 13754:2009 (E) 9 Annex A (informative) General information on bentonite A.1 Origin A.1.1 Raw material Bentonite exists in nature as a c
42、lay deposit. It is generally contaminated by sand and rocks. A.1.2 Manufacturing process Bentonite is produced by mining and crushing in the quarry and then treating in a plant where it is crushed to the end use size and dried. By mixing powdered sodium carbonate during crushing it is possible to ex
43、change the divalent metal (generally Ca2+) partly by Na+; this increases the swelling properties of the bentonite. A.2 Physical properties The absolute density is in the range 2 g/cm3to 2,4 g/cm3. A.3 Use A.3.1 Function Bentonite is used to weigh down a flock when there is a low amount of suspended
44、solids in the water. A.3.2 Treatment dose The treatment dose depends on raw water quality, process plant and treatment objectives and is generally up to 20 mg/l. A.4 Rules for safe handling and use Bentonite is not a hazardous product. It is recommended to avoid exposure to the dust which is irritat
45、ing to the nose and throat. A.5 Emergency procedure A.5.1 First aid. In case of contact with skin, there is no danger - it is recommended to wash with soap and water. In case of contact with eyes, it is recommended to flush with plenty of water. In case of inhalation, it is recommended to move to fr
46、esh air. BS EN 13754:2009EN 13754:2009 (E) 10 A.5.2 Spillage It is recommended to sweep up and to discard in a refuse container. A.5.3 Fire No special requirements apply. BS EN 13754:2009EN 13754:2009 (E) 11 Bibliography 1 98/83/EC, Council Directive of 3 November 1998 on the quality of water intend
47、ed for human consumption 2 67/548/EEC, Council Directive of 27th June 1967 on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances and its amendments and adaptations BS EN13754:2009BSI GroupHeadquarte
48、rs 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Ro
49、yal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments oreditions.It is the constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform the Secretary of the technical committeeresponsible, the identity of which can be found on the inside front cover. Tel:+44 (0)20 8996 9000. Fax: +44 (0)20 8
