EN 882-2004 3257 Chemicals used for treatment of water intended for human consumption - Sodium aluminate《饮用水处理用化学试剂 铝酸钠》.pdf

1、BRITISH STANDARD BS EN 882:2004 Chemicals used for treatment of water intended for human consumption Sodium aluminate The European Standard EN 882:2004 has the status of a British Standard ICS 71.100.80 Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIBS EN 882:20

2、04 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 2 December 2004 BSI 2 December 2004 ISBN 0 580 44943 2 National foreword This British Standard is the official English language version of EN 882:2004. It supersedes BS EN 882:1997 which is w

3、ithdrawn. The UK participation in 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. Cross-references The British Stan

4、dards which implement international or European publications referred to in this document may be found 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. Thi

5、s publication does not purport to include all the necessary provisions of a contract. Users are responsible 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 inte

6、rnational/European committee any enquiries on the interpretation, or proposals for change, and keep 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

7、title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy,

8、(c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 882 November 2004 ICS 71.100.80 Supersedes EN 882:1997 English version Chemicals used for treatment of water intended for human consumption - Sodium aluminate Produits chimiques utiliss pour le traitement de leau destine la consommation hu

9、maine - Aluminate de sodium Produkte zur Aufbereitung von Wasser fr menschlichen Gebrauch - Natriumaluminat This European Standard was approved by CEN on 30 September 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe

10、an 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. This European Standard exists in three official versions (English,

11、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 national standards bodies of Austria, Belgium, Cyprus, Czech R

12、epublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMA

13、LISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 882:2004: E Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled

14、 Copy, (c) BSIEN 882:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 Purity criteria8 5 Test methods10 6 Labelling Transportation Storage 11 Annex A (informative) General information on sodium aluminate.13 Annex B (normative) General rules rel

15、ating to safety17 Bibliography 18 Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 882:2004 (E) 3 Foreword This document (EN 882:2004) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European S

16、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 882:1997. Significant technical differences

17、between this edition and EN 882:1997 are as follows: a) replacement of the reference to EU Directive 80/778 of 15 July 1980 with the latest Directive in force (see1); b) introduction of an annex B (normative) giving general rules relating to safety; c) expansion of Annex A by addition of A.2 “Qualit

18、y of commercial product“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

19、Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 882:2004 (E) 4 Introduction In respect of potential

20、adverse effects on the quality of water intended for human consumption, caused by the product covered by this document: a) this document 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

21、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 document does not confer or imply acceptance or approval of the product in any of the Member States of the EU

22、or EFTA. The use of the product covered by this document is subject to regulation or control by National Authorities. Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 882:2004 (E) 5 1 Scope This document is applicable to sodium aluminate used for treatment of w

23、ater intended for human consumption. It describes the characteristics and specifies the requirements of sodium aluminate and refers to the corresponding analytical methods. It gives information for its use in water treatment. It also determines the rules relating to safe handling and use of sodium a

24、luminate (see Annex B). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN

25、 1302, Chemicals used for treatment of water intended for human consumption Aluminium based coagulants Analytical methods ISO 3165, Sampling of chemical products for industrial use Safety in sampling ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products for i

26、ndustrial 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 name Sodium aluminate 3.1.3 Relative molecular mass 82 for NaAlO 2.3.1.4 Empiric

27、al formula NaAlO 20,1 Na 2 O.nH 2 O (n varies from 0,3 to 0,4) 3.1.5 Chemical formula NaAlO 2Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 882:2004 (E) 6 3.1.6 CAS Registry Number 1)11138-49-1 3.1.7 EINECS reference 2)234-391-6 3.2 Commercial form Sodium alu

28、minate is available as solids (powder or granules) or solutions. 3.3 Physical properties 3.3.1 Appearance The product is a white powder or granules or colourless to yellow liquid. 3.3.2 Density The absolute density of solids products is 2,35 g/cm 3The tamped bulk density (powder) is between 1 g/cm 3

29、to 1,2 g/cm 3(depends on grain size). The density of solutions is 1,5 g/ml for a solution containing 10 % of active matter, expressed as mass fraction of aluminium in the product (10 % Al). 3.3.3 Solubility Sodium aluminate is soluble in water to yield solutions of up to 12,7 % Al at 20 C (concentra

30、tion higher than 400 g/l). NOTE Depending on temperature and degree of dilution, solutions of sodium aluminate can hydrolyse and form a precipitate. 3.3.4 Vapour pressure Solid not applicable Solution not known 1) Chemical Abtracts Service Registry Number. 2) European inventory of Existing Commercia

31、l chemicals Substances. Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 882:2004 (E) 7 3.3.5 Boiling point at 100 kPa 3) Solid not applicable Solution not known 3.3.6 Melting or crystallization point Solid melting point : 1 650 C Solution typical values for cr

32、ystallization point range between - 15 C and - 25 C 3.3.7 Specific heat Not known 3.3.8 Viscosity (dynamic) Typical values of dynamic viscosity for sodium aluminate solutions, containing 10 % Al and 12,7 % Al are given in Table 1. Table 1 Viscosity Temperature C Viscosity mPa . s 10 % Al 12,7 % Al -

33、 5 1 250 15 000 0 650 7 000 5 360 2 850 10 200 1 650 15 140 900 20 120 560 3.3.9 Critical temperature Not applicable 3.3.10 Critical pressure Not applicable 3.3.11 Physical hardness Solid not known Solution not applicable 3) 100 kPa = 1 bar Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005,

34、Uncontrolled Copy, (c) BSIEN 882:2004 (E) 8 3.4 Chemical properties Sodium aluminate solutions are highly alkaline. Their solutions hydrolyse and form a precipitate of aluminium hydroxide when diluted beyond a particular level or neutralized. NOTE Since aluminium compounds are amphoteric in nature,

35、the solubility of aluminium depends on the pH value and the product should to be used within an appropriate pH range. When dissolved in drinking water, calcium is partially precipitated with aluminium hydroxide. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements fo

36、r sodium aluminate 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 when nece

37、ssary 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, required dosage, contents of other impurities and addi

38、tives used in the product not stated in this document. Limits have been given for impurities 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 leads to significant q

39、uantities of impurities, by-products or additives being present, this shall be notified to the user. 4.2 Composition of commercial product The concentration of active matter in the commercial product, expressed as a mass fraction of aluminium in the product (Al %) shall be within 3 % of the manufact

40、urers declared values. NOTE The concentration of water-soluble aluminium in commercial product varies. Typical values are given here below: Al % of the product Solid forms 27,5 to 29,1 Solution forms 10 to 13,2 Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 8

41、82:2004 (E) 9 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 2. Table 2 Limits of impurities Impurity Limit g/kg of Al Iron (Fe) max. 0,8 Insoluble matter (solid product) max 8 NOTE The value quoted for iron is both iron (II) and iron (III). Iron

42、 can be present as a component of the product and will usually be removed in the treatment process. 4.4 Chemical parameters The product shall conform to the requirements specified in Table 3. Table 3 Chemical parameters Limit mg/kg of Al Parameter type 1 type 2 type 3 Arsenic (As) max. 14 40 100 Cad

43、mium (Cd) max. 3 50 100 Chromium (Cr) max. 30 700 1 000 Mercury (Hg) max. 4 10 20 Nickel (Ni) max. 20 700 1 000 Lead (Pb) max. 40 200 800 Antimony (Sb) max. 20 40 120 Selenium (Se) max. 20 40 120 NOTE Cyanide (CN - ) is usually not relevant because of the acidity of the product. Pesticides and polyc

44、yclic aromatic hydrocarbons are not relevant since the raw materials used in the manufacturing process are free of them. For maximum impact of sodium aluminate on trace metal content in drinking water see A.2. Licensed Copy: Wang Bin, na, Wed Mar 16 02:11:02 GMT 2005, Uncontrolled Copy, (c) BSIEN 88

45、2:2004 (E) 10 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations of ISO 3165 and take into account ISO 6206. 5.1.2 Solid Prepare the laboratory sample(s) required by the relevant procedure described in ISO 8213. 5.1.3 Liquid 5.1.3.1 Sampling from drums and bottles 5.1.3.1.

46、1 General 5.1.3.1.1.1 Mix the contents of each container to be sampled by shaking the container, by rolling it or by rocking it from side to side, taking care not to damage the container or spill any of the liquid. 5.1.3.1.1.2 If the design of the container is such (for example, a narrow-necked bott

47、le) that it is impracticable to use a sampling implement, take a sample by pouring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.3.1.1.3. 5.1.3.1.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface

48、as described in 5.1.3.1.2; otherwise, take samples as described in 5.1.3.1.3. 5.1.3.1.2 Surface sampling Take a sample using a suitable ladle. Lower the 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 comp

49、letely 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. 5.1.3.1.3 Bottom sampling Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container and the viscosity of the liquid. When using an open sampling tub