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1、BRITISH STANDARD BS EN 13754:2003 Products used for treatment of water intended for human consumption Bentonite The European Standard EN 13754:2003 has the status of a British Standard ICS 71.100 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c)
2、 BSI BS EN 13754:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 April 2003 BSI 3 April 2003 ISBN 0 580 41518 X National foreword This British Standard is the official English language version of EN 13754:2003. The UK participation in
3、its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Additional information Article 10 of the Council of the European Co
4、mmunity Directive 98/83/EC on the quality of water intended for human consumption requires Member States to ensure that substances and materials (including associated impurities) used in the preparation of drinking water do not remain in treated water at concentrations that are higher than necessary
5、 or that would reduce the protection of public health provided for in the Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Quality) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision
6、for attaching conditions of use to chemicals and filter media that are authorized for use in public water supplies. Details of conditions of use are contained in the List of Products and Processes Approved Under Regulations 25 and 26 For Use in Connection With The Supply of Water For Drinking, Washi
7、ng, Cooking And Food Production Purposes published by the Drinking Water Inspectorate, Floor 2/A1, Ashdown House, 123 Victoria Street, London SW1 6DE (www.dwi.gov.uk). Cross-references The British Standards which implement international or European publications referred to in this document may be fo
8、und in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are res
9、ponsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep
10、 the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 11 and a back cover. The BSI copyright date displayed in this document indic
11、ates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13754 March 2003 ICS 71.100.80 English ver
12、sion Products used for treatment of water intended for human consumption - Bentonite Produits utiliss pour le traitement de leau destine la consommation humaine - Bentonite Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Bentonit This European Standard was approved by CEN on 19 A
13、ugust 2002. CEN members 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 o
14、btained on application to the 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 Management
15、Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland
16、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 137
17、54:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 2 Contents Foreword3 1Scope 5 2Normative references 5 3Terms, definitions and symbols.5 4Description .5 5Physical properties6 6Chemical properties 6 7Test methods7 8
18、Labelling, transportation and storage .7 Annex A (informative) General information on bentonite .9 Bibliography11 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 3 Foreword This document (EN 13754:2003) has been prepared by
19、 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 the latest by September 2003, and conflicting national standards shall
20、be withdrawn at the latest by September 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Icelan
21、d, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and the United Kingdom. Annex A is informative. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 4 Introduction
22、 In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard : 1) 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 ; 2) it s
23、hould 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN
24、 13754:2003 (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 specifies the requirements and the corresponding test methods for bentonite. It gives information on its use in wa
25、ter treatment. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendmen
26、ts to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 12901, Products used for the treatment of water intended
27、for human consumption - Inorganic supporting and filtering materials Definitions. EN 12902, Products used for the treatment of water intended for human consumption - Inorganic supporting and filtering materials - Methods of test. EN 12485, Chemicals used for treatment of water intended for human con
28、sumption- Calcium carbonate, high-calcium lime and half-burnt dolomite- Test methods. 3 Terms, definitions and symbols For the purposes of this European Standard, the terms, definitions and symbols given in EN 12901 apply. 4 Description 4.1 Identification 4.1.1 Chemical name Not applicable. 4.1.2 Sy
29、nonym or common names Montmorillonite, Bentonite, Amargosite, Ardmorite, Askanite, Confolensite, Erinite, Galapectite, Malthacite, Samote, Steargilite, Stolpenite, Wilkonite. Montmorillonite and bentonite are the most commonly used names. 4.1.3 Chemical formula Si4Al2-x Mx 2+ Mx+ O10 (OH)2 . nH2O, w
30、here x varies from 0 to 2. The divalent metal M2+ can be replaced completely or partly by M+ so as to maintain electrical charge equilibrium. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 6 4.1.4 CAS Registry Number 1) 13
31、02-78-9. 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+) concentration. 5 Physical properties 5.1 Appearance The product is a white to light brown or green powder. 5.2 Particle size distribut
32、ion At least a mass fraction of 95 % of the product shall have a particle size less than 500 m. NOTEThe particle size distribution is commonly specified as a given percent by mass less than a given particle size. The particle size distribution shall be within the manufacturers declared values. 5.3 B
33、ulk density packed The bulk density packed shall be in the range 800 kg/m3 to 1 000 kg/m3. 6 Chemical properties The composition of the commercial product shall conform to Table 1. Table 1 Composition of commercial product Limit as a mass fraction in % of the product ParameterMinimumMaximum SiO25070
34、 Al2O31020 MgO14,5 CaO0,54 Na2O0,53 Mass loss at 105 C015 NOTE 1When used in treatment to produce drinking water, bentonite should not increase the concentrations of chemical parameters above the regulated values (see 1). 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existi
35、ng Commercial Chemical Substances. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 7 NOTE 2Water extractable substances, determined in accordance with the method for powders given in EN 12902, can be used to estimate the le
36、aching of the chemical specified in EN 12902. 7 Test methods 7.1 Sampling Prepare the laboratory sample(s) required by the relevant 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 Bu
37、lk density packed The bulk density packed shall be determined in accordance with EN 12902. 7.2.3 Chemical analysis The content of SiO2 shall 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 Th
38、e mass loss shall be determined by the method for water content, heating to 105 C, in accordance with EN 12902. 8 Labelling, transportation and storage 8.1 Means of delivery Bentonite shall be delivered in bags, big bags and bulk. In order that the purity of the product is not affected, the means of
39、 delivery shall not have been used previously for any different product or it shall have been 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. 8.3 Transportation regulations and labelling Bentonit
40、e 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. 3) See 2. 4) United Nations number. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) B
41、SI EN 13754:2003 (E) 8 8.4 Marking The marking shall include the following : the name “bentonite“, trade name and grade ; the net mass ; the 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
42、 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 the bentonite. 8.5.2 Storage incompatibilities Keep away from volatile solvents, odorous products and moisture. Licensed Copy: sheffieldun sheffieldun, na, Sun
43、Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 9 Annex A (informative) General information on bentonite A.1 Origin A.1.1 Raw material Bentonite exists in nature as a clay deposit. It is generally contaminated by sand and rocks. A.1.2 Manufacturing process Bentonite is p
44、roduced 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 exchange the divalent metal (generally Ca2+) partly by Na+ ; this increases the swelling properties of th
45、e bentonite. A.2 Physical properties The absolute density is in the range 2 g/cm3 to 2,4 g/cm3. A.3 Use A.3.1 Function Bentonite is used to weigh down a floc when there is a low amount of suspended solids in the water. A.3.2 Treatment dose The treatment dose depends on raw water quality, process pla
46、nt 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 irritating to the nose and throat. A.5 Emergency procedure A.5.1 First aid. In case of contact with skin, the
47、re 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 fresh air. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled
48、Copy, (c) BSI EN 13754:2003 (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. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13754:2003 (E) 11 Bibliography
49、 1 98/83/EC, Council Directive of 3 November 1998 on the quality of water intended 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:10:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13754:2003 BSI 389 C