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1、BRITISH STANDARD BS EN 883:1997 Chemicals used for treatment of water intended for human consumption Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate The European Standard EN 883:1997 has the status of a British Standard ICS 71.100.80 Licensed Copy: sheffieldun sheffield
2、un, na, Tue Nov 07 03:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 883:1997 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 October 1997 BSI
3、 10-1999 The following BSI references relate to the work on this standard: Committee reference CII/59 Draft for comment 92/57684 DC ISBN 0 580 28333 X Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CII/59, Chemicals for
4、drinking water treatment, upon which the following bodies were represented: Association of Consulting Scientists British Association for Chemical Specialities British Compressed Gases Association British Lime Association British Water Chartered Institution of Water and Environmental Management Chemi
5、cal Industries Association Department of the Environment (Drinking Water Inspectorate) Industrial Water Society Salt Manufacturers Association Water Companies Association Water Research Centre Water Services Association of England and Wales Amendments issued since publication Amd. No.DateComments Li
6、censed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 883:1997 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 8833 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GM
7、T+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 883:1997 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee CII/59 and is the English language version of EN 883:1997 Chemicals used for treatment of water intended for human consumption Polyaluminium chlorid
8、e hydroxide and polyaluminium chloride hydroxide sulfate published by the European Committee for Standardization (CEN). The United Kingdom did not support this standard at the CEN Enquiry stage and voted against its acceptance at the Formal Vote stage. The principal UK objections were as follows: a)
9、 the first paragraph of 4.2 contains a requirement which is impossible to verify; b) there are no requirements in 4.2 for the purity of the product. In 6.4 there is a requirement to mark the “grade” of the product on the container and/or delivery documentation. There is no requirement to mark the co
10、ntainer or documentation with the “type” (see 4.4) but the BSI technical committee recommends that this information is always included. Additional information Article 8 of the Council of the European Community Directive 80/778/EEC relating to the quality of water intended for human consumption requi
11、res Member States to ensure that substances used in the preparation of drinking water do not cause any contravention of the maximum admissible concentrations prescribed in annex 1 to the Directive. This requirement is given effect in England and Wales by regulation 25 of the Water Supply (Water Qual
12、ity) Regulations 1989 (similar provisions apply in Scotland and Northern Ireland). Regulation 25 makes provision for attaching conditions of use to chemicals which are authorized for use in public water supplies. Details of conditions of use are contained in the Secretary of States List of Approved
13、Products published by the Drinking Water Inspectorate, Room B153, Romney House, 43 Marsham Street, London SW1P 3PY. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a B
14、ritish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments
15、incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 883 February 1997 ICS 71.100.80 Descriptors: Potable
16、water, water treatment, chemical compounds, aluminium hydroxidechloridesulfate, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, storage, utilization English version Chemicals used for treatment of water intended for human consumption Polyalumini
17、um chloride hydroxide and polyaluminium chloride hydroxide sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine Polyhydroxychlorure daluminium et Polyhydroxychlorosulfate daluminium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch Polyalumini
18、umchloridhydroxid und Polyaluminiumchloridhydroxidsulfat This European Standard was approved by CEN on 1997-01-17. 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
19、alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by tr
20、anslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemb
21、ourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members Ref. No. EN 883
22、:1997 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 883:1997 BSI 10-1999 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 164, Water supply, the Secretariat of which is held by AFNOR. This European Sta
23、ndard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 1997, and conflicting national standards shall be withdrawn at the latest by August 1997. This European Standard was circulated for CEN Enquiry as two separat
24、e drafts, prEN 883 and prEN 884, which have now been combined. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Irela
25、nd, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Description3 3.1Identification3 3.2Commercial forms3 3.3Physical properties4 3.4Chemical properties4 4Purity criteria4 4.1Gen
26、eral4 4.2Composition of commercial product4 4.3Impurities and main by-products4 4.4Toxic substances4 5Test methods5 5.1Sampling5 5.2Analyses5 6Labelling Transportation Storage5 6.1Means of delivery5 6.2Risk and safety labelling in accordance with EU-Directives5 6.3Transportation regulations and labe
27、lling6 6.4Marking6 6.5Storage6 Annex A (informative) General information on polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate7 A.1Origin7 A.2Use7 A.3Rules for safe handling and use7 A.4Emergency procedures7 Annex B (informative) Bibliography7 Table 1 Toxic substances5 Lic
28、ensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 883:1997 BSI 10-19993 Introduction 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 standa
29、rd 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 should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of
30、this product remain in force. 1 Scope This European Standard describes the characteristics and specifies the requirements of polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate used for treatment of water intended for human consumption and gives reference to the analytical
31、methods. It gives information on their use in water 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 her
32、eafter. For dated references, subsequent amendments 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. prEN 1302, Chemicals used for trea
33、tment of water intended for human consumption Aluminium based coagulants Analytical methods Purity classification. ISO 3165, Sampling of chemical products for industrial use Safety in sampling. ISO 6206, Chemical products for industrial use Sampling Vocabulary. 3 Description 3.1 Identification A cha
34、racteristic of these products is their high tendency to hydrolyse, which restricts their use (see 3.3.3); this tendency results from the particular oligomeric or polymeric composition. 3.1.1 Chemical names a) Polyaluminium chloride hydroxide. b) Polyaluminium chloride hydroxide sulfate. 3.1.2 Synony
35、m or common names a) Polyaluminium chloride, PAC, PACl; basic aluminium chloride, BAC. NOTEIn French, the term “Polychlorure daluminium” is deprecated. b) Polyaluminium chloride, PAC; polyaluminium chloride sulfate, PACS. 3.1.3 Relative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula a)
36、 Al(OH)aClb with (a + b) = 3 and a greater than 1,05. b) Al(OH)aClb(SO4)c with (a + b + 2c) = 3 and a greater than 1,05 3.1.5 Chemical formula Variable (see 3.1.4). 3.1.6 CAS Registry Number1) a1) a and b variable: 1327-41-9 with a greater than 1,05. a2) a = 2,5; b = 0,5: 12042-91-0. a3) a = 2; b =
37、1: 10284-64-7. b) a, b and c variable: 39290-78-3 with a greater than 1,05. 3.1.7 EINECS reference2) a1) 215-477-2 a2) 234-933-1 a3) 233-632-2 b) 254-400-7 3.2 Commercial forms These products are generally available as liquids. These products vary in their relative basicity (mole ratio OH/3Al), the
38、percentage of chloride and sulfate ions present and in their method of manufacture. NOTEThese variations may affect their performance in the water treatment plant. Special water plant requirements regarding, but not limited to, such items as: organic matter removal, residual aluminium levels and wor
39、king pH values should be specified when possible, such that the product which best fits the needs be offered. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:05 GMT+00:00 200
40、6, Uncontrolled Copy, (c) BSI EN 883:1997 4 BSI 10-1999 3.3 Physical properties 3.3.1 Appearance Colourless to yellow. 3.3.2 Density The density depends on the particular composition, especially the aluminium ion content, expressed as aluminium percent by mass Al % (m/m). Typical values: a) Polyalum
41、inium chloride hydroxide: 1,35 g/ml to 1,40 g/ml for 9,5 Al % (m/m). b) Polyaluminium chloride hydroxide sulfate: 1,18 g/ml to 1,22 g/ml for 5,3 Al % (m/m); 1,16 g/ml for 4,2 Al % (m/m). 3.3.3 Solubility All polyaluminium chloride hydroxides and polyaluminium chloride hydroxide sulfates are fully mi
42、scible with water. NOTEDepending on the particular product, dilute solutions can hydrolyse and form a precipitate. 3.3.4 Vapour pressure Not known. 3.3.5 Boiling point at 100 kPa3) Not known. 3.3.6 Crystallization point Typical values: a) Polyaluminium chloride hydroxide: 20 C for 9,5 Al % (m/m); 0
43、C for 12,4 Al % (m/m); b) Polyaluminium chloride hydroxide sulfate: 10 C to 15 C for 5,3 Al % (m/m); 5 C for 4,2 Al % (m/m). 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Typical values at 20 C: a) Polyaluminium chloride hydroxide: 10 mPas to 50 mPas for 9,5 Al % (m/m); b) Polyaluminium c
44、hloride hydroxide sulfate: 3 mPas to 10 mPas for 5,3 Al % (m/m). 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate are acid
45、ic liquids which hydrolyse and form a precipitate of aluminium hydroxide when diluted beyond a particular level. Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH value. 4 Purity criteria 4.1 General Limits have been given for impurities and toxic subs
46、tances where these are likely to be present in significant quantities from the current production process and raw materials. If a change in the production process or raw materials leads to significant quantities of other impurities or by-products being present, this shall be notified to the user. 4.
47、2 Composition of commercial product Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate are the results of a complex manufacturing process from producers and shall not be, in any case, the result of a mixture of available commercial products. The concentration of active mat
48、ter is expressed in grams of aluminium per kilogram of product (g Al/kg). The content of water soluble aluminium varies. NOTETypical values can be between 42 g and 124 g of aluminium per kilogram of product. The commercial products vary in the proportions of chloride and sulfate ions. Basicity: The
49、relative basicity of the polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate, expressed as the mole ratio OH/3Al, shall be greater than 0,35. 4.3 Impurities and main by-products Impurities derived from the manufacturing or extraction processes include insoluble matter, trace metals and organic compounds. 4.4 Toxic substances NOTEFor the purpose of this standard, “toxic substances” are those defined in the EEC Directive 80/778/EEC of July 15, 1980 (see B.1). The content of toxic substances s
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