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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 882 : 1997 The Euro
2、pean Standard EN 882 : 1997 has the status of a British Standard ICS 71.100.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Chemicals used for treatment of water intended for human consumption Sodium aluminate Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04
3、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 882 : 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 1997 The following BSI re
4、ferences relate to the work on this standard: Committee reference CII/59 Draft for comment 92/57683 DC ISBN 0 580 28330 5 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical
5、 Committee CII/59, Chemicals for 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 a
6、nd Environmental Management Chemical 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 Licensed Copy: sheffieldun
7、 sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1997i BS EN 882 : 1997 National foreword This British Standard has been prepared by Technical Committee CII/59 and is the English language version of EN 882 : 1997 Chemicals used for treatment of water intended for
8、human consumption Sodium aluminate published by the European Committee for Standardization (CEN). In 6.4 there is a requirement to mark the grade of product on the container and/or delivery documentation but there is no specific requirement to mark the container or documentation with the type (see 4
9、.4). 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 requires Member States to ensure that substances used i
10、n 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 Quality) Regulations 1989 (similar provisions apply in
11、 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 Products published by the Drinking Water Inspector
12、ate, Room B153, Romney House, 43 Marsham Street, London SW1P 3PY. Compliance with a British 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, an EN title page, pages 2 to 8, an inside bac
13、k cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iiblank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Eu
14、rope en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members Ref. No. EN 882 : 1997 E EUROPEAN STANDARDEN 882 NORME EUROPE ENNE EUROPA ISCHE NORM February 1997 ICS 71.100.80 Descriptors: Potable water, wat
15、er treatment, chemical compounds, aluminates, sodium, description, physical properties, chemical properties, impurities, toxic substances, tests, labelling, storage, utilization English version Chemicals used for treatment of water intended for human consumption Sodium aluminate Produits chimiques u
16、tilise s pour le traitement de leau destine e a la consommation humaine Aluminate de sodium Produkte zur Aufbereitung von Wasser fu r den menschlichen Gebrauch Natriumaluminat This European Standard was approved by CEN on 1997-01-17. CEN members are bound to comply with the CEN/CENELEC Internal Regu
17、lations 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 application to the Central Secretariat or to any CEN member. The Eu
18、ropean Standards exist 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 Central Secretariat has the same status as the official versions. CEN members are the na
19、tional standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy
20、, (c) BSI Page 2 EN 882 : 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Comittee 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
21、by endorsement, at the latest by August 1997, and conflicting national standards shall be withdrawn at the latest by August 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
22、 Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Description3 3.1Identification3 3.2Commercial form3 3.3Phy
23、sical properties3 3.4Chemical properties4 4Purity criteria4 4.1General4 4.2Composition of commercial product4 4.3Impurities and main by-products4 4.4Toxic substances5 5Test methods5 5.1Sampling5 5.2Analyses5 6Labelling Transportation Storage6 6.1Means of delivery6 6.2Risk and safety labelling in acc
24、ordance with the EU-Directives6 6.3Transportation regulations and labelling6 6.4Marking6 6.5Storage6 Annex A (informative) General information on sodium aluminate7 A.1 Origin7 A.2 Use7 A.3 Rules for safe handling and use7 A.4 Emergency procedures7 Annex B (informative) Bibliography8 Licensed Copy: s
25、heffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 882 : 1997 BSI 1997 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. Introduction In respect of potential adverse effects on the quality
26、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 should be noted that, while awaiting the adoption of verifi
27、able European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. 1 Scope This European Standard describes the characteristics and specifies the requirements of sodium aluminate used for treatment of water intended for human consumpt
28、ion and gives reference to the analytical methods. It gives information on its 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
29、text and the publications are listed hereafter. 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 app
30、lies. prEN 1302Chemicals used for treatment of water intended for human consumption Aluminium based coagulants Analytical methods Purity classification ISO 3165Sampling of chemical products for industrial use Safety in sampling ISO 6206Chemical products for industrial use Sampling Vocabulary ISO 821
31、3Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Aluminium sodium oxide. 3.1.2 Synonym or common names Sodium aluminate. 3.1.3 Relative molecular mass 8
32、2 (for NaAlO2) 3.1.4 Empirical formula NaAlO20,1 Na2OnH2O (n = 0,3 to 0,4) 3.1.5 Chemical formula NaAlO2 3.1.6 CAS Registry Number1) 11138-49-1 3.1.7 EINECS reference2) 234-391-6 3.2 Commercial form Sodium aluminate is available as solids (powder or granules) or solutions. 3.3 Physical properties 3.
33、3.1 Appearance Solid: white powder or granules. Solution: colourless to yellow liquid. 3.3.2 Density Absolute density of solids: 2,35 g/cm3. Tamped bulk density (powder): 1 g/cm3to 1,2 g/cm3 (depends on grain size). Density of solutions: 1,5 g/ml for a solution containing 10 % of active matter, expr
34、essed as aluminium percent by mass in the product (Al 10 % (m/m). 3.3.3 Solubility Sodium aluminate is soluble in water to yield solutions of up to 12,7 Al % (m/m) at 20 C (concentration higher than 400 g/l). NOTE. Depending on temperature and degree of dilution, solutions of sodium aluminate can hy
35、drolyse and form a precipitate. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 882 : 1997 BSI 1997 3) 100 kPa = 1 bar. 3.3.4 Vapour pressure Solid: not applicable. Solution: not known. 3.3.5 Boiling point at 100 kPa3) Solid: not a
36、pplicable. Solution: not known. 3.3.6 Melting or crystallization point Solid: melting point: 1650 C Solution: typical values for crystallization point range between 215 C and 225 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Typical values of dynamic viscosity for sodium aluminate solu
37、tions, containing 10 Al % (m/m) and 12,7 Al % (m/m) are given in table 1. Table 1. Viscosity TemperatureViscosity CmPas 10 Al % (m/m)12,7 Al % (m/m) 25125015000 06507000 53602850 102001650 15140900 20120560 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Ph
38、ysical hardness Solid: not known. Solution: not applicable. 3.4 Chemical properties Sodium aluminate solutions are highly alkaline. They hydrolyse and form a precipitate of aluminium hydroxide when diluted beyond a particular level or neutralized. NOTE. Since aluminium compounds are amphoteric, they
39、 should be used within a particular pH range. When dissolved in potable water, calcium is partially precipitated with aluminium hydroxide. 4 Purity criteria 4.1 General Limits have been given for impurities and toxic substances where these are likely to be present in significant quantities from the
40、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. 4.2 Composition of commercial product The content of active matter, expressed as
41、aluminium percent by mass in the product (Al % (m/m) shall not be outside the range of values specified as follows: Solid: 27,5 Al % (m/m) to 29,1 Al % (m/m); Solution: 10 Al % (m/m) to 13,2 Al % (m/m). 4.3 Impurities and main by-products The contents of impurities shall conform to the requirements
42、specified in table 2. If iron (III) is present, it will usually be removed in the treatment process. Table 2. Impurities ImpurityLimit g/kg of Al Iron (Fe)max. 0,8 Insoluble matter (solid product)max. 8 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 03:21:04 GMT+00:00 2006, Uncontrolled Copy
43、, (c) BSI Page 5 EN 882 : 1997 BSI 1997 4.4 Toxic substances NOTE. For 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 shall conform to the requirements specified in table 3. Table 3. Toxic s
44、ubstances ParameterLimit mg/kg of Al Type 1Type 2Type 3 Arsenic (As)max. 1440100 Cadmium (Cd)max.350100 Chromium (Cr)max. 307001000 Mercury (Hg)max.41020 Nickel (Ni)max. 207001000 Lead (Pb)max. 40200800 Antimony (Sb)max. 2040120 Selenium (Se)max. 2040120 NOTE. Cyanide (CN-) is usually not relevant b
45、ecause of the acidity of the product. Pesticides and polycyclic aromatic hydrocarbons are not relevant since the raw materials used in the manufacturing process are free of them. 5 Test methods 5.1 Sampling 5.1.1 Solids Observe the general recommendations of ISO 3165 and take account of ISO 6206. Pr
46、epare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.1.2 Liquid 5.1.2.1 Sampling from drums and bottles 5.1.2.1.1 General 5.1.2.1.1.1 Mix the contents of the container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taki
47、ng care not to damage the container or spill any of the liquid. 5.1.2.1.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as
48、 described in 5.1.2.1.1.3. 5.1.2.1.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.2.1.2; otherwise, take samples as described in 5.1.2.1.3. 5.1.2.1.2 Surface sampling Take a sample using a suitable ladle. Lower th
49、e ladle into the liquid until the rim is just below the surface, so that the surface layer runs into it. Withdraw the ladle just before it fills completely and allow any liquid adhering to the ladle to drain off. If necessary, repeat this operation so that, when the other selected containers have been sampled in a similar manner, the total volume of sample required for subsequent analysis is obtained. 5.1.2.1.3 Bottom sampling Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the