1、BSI Standards PublicationBS EN 882:2016Chemicals used for treatmentof water intended for humanconsumption SodiumaluminateBS EN 882:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 882:2016. Itsupersedes BS EN 882:2004 which is withdrawn.The UK participation
2、in its preparation was entrusted to TechnicalCommittee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are res
3、ponsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 90466 0ICS 13.060.20; 71.100.80Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of
4、theStandards Policy and Strategy Committee on 30 April 2016.Amendments issued since publicationDate Text affectedBS EN 882:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 882 March 2016 ICS 71.100.80 Supersedes EN 882:2004English Version Chemicals used for treatment of water intended for hu
5、man consumption - Sodium aluminate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Aluminate de sodium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Natriumaluminat This European Standard was approved by CEN on 18 January 2016. CEN member
6、s 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 obtained on application
7、 to the CEN-CENELEC 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 CEN-CENELEC Managemen
8、t Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
9、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17,
10、B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 882:2016 EBS EN 882:2016EN 882:2016 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Description 6 3.1 Identification
11、 6 3.1.1 Chemical name . 6 3.1.2 Synonym or common name . 6 3.1.3 Relative molecular mass . 6 3.1.4 Empirical formula . 6 3.1.5 Chemical formula 6 3.1.6 CAS Registry Number 7 3.1.7 EINECS reference 7 3.2 Commercial form . 7 3.3 Physical properties . 7 3.3.1 Appearance 7 3.3.2 Density 7 3.3.3 Solubil
12、ity 7 3.3.4 Vapour pressure 7 3.3.5 Boiling point at 100 kPa . 7 3.3.6 Melting or crystallization point . 7 3.3.7 Specific heat 8 3.3.8 Viscosity (dynamic) 8 3.3.9 Critical temperature 8 3.3.10 Critical pressure 8 3.3.11 Physical hardness . 8 3.4 Chemical properties . 8 4 Purity criteria . 9 4.1 Gen
13、eral 9 4.2 Composition of commercial product 9 4.3 Impurities and main by-products . 9 4.4 Chemical parameters . 9 5 Test methods . 10 5.1 Sampling 10 5.1.1 General . 10 5.1.2 Solid . 10 5.1.3 Liquid 10 5.2 Analyses . 11 6 Labelling Transportation Storage 11 6.1 Means of delivery . 11 6.2 Labelling
14、in accordance with the EU legislation 11 6.3 Transportation regulations and labelling . 12 6.4 Marking 13 BS EN 882:2016EN 882:2016 (E) 3 6.5 Storage 13 6.5.1 General . 13 6.5.2 Long term stability . 13 6.5.3 Storage incompatibilities . 13 Annex A (informative) General information on sodium aluminat
15、e 14 A.1 Origin 14 A.1.1 Raw materials 14 A.1.2 Manufacturing process . 14 A.2 Quality of commercial product 14 A.3 Use 17 A.3.1 Function . 17 A.3.2 Form in which it is used 17 A.3.3 Treatment dose . 17 A.3.4 Means of application 18 A.3.5 Secondary effects 18 A.3.6 Removal of excess product 18 Annex
16、 B (normative) General rules relating to safety 19 B.1 Rules for safe handling and use . 19 B.2 Emergency procedures . 19 B.2.1 Accident 19 B.2.2 Spillage . 19 B.2.3 Fire . 19 Bibliography . 20 BS EN 882:2016EN 882:2016 (E) 4 European foreword This document (EN 882:2016) has been prepared by Technic
17、al 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 2016, and conflicting national standards shall be withd
18、rawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of 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 882:2004. Significan
19、t technical differences between this edition and EN 882:2004 are as follows: a) addition of chemical names for aluminium sodium dioxide and for aluminium sodium tetrahydroxide; b) replacement of warning and safety precautions notes by labelling according to Regulation (EC) No 1272/2008. According to
20、 the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece
21、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 882:2016EN 882:2016 (E) 5 Introduction In respect of potential adverse effects on the quality
22、 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 awaiting the adoption of verif
23、iable 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 or EFTA. The use of the produc
24、t covered by this document is subject to regulation or control by National Authorities. BS EN 882:2016EN 882:2016 (E) 6 1 Scope This document is applicable to sodium aluminate used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements
25、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 aluminate (see Annex B). 2 Normative references The following documents, in whole or in part, are norm
26、atively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1302, Chemicals used for treatment of water intended for h
27、uman 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 industrial use Sampling techniques Solid chemical produc
28、ts in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name Aluminium sodium oxide Aluminium sodium dioxide Aluminium sodium tetrahydroxide 3.1.2 Synonym or common name Sodium aluminate 3.1.3 Relative molecular mass 82 for NaAlO2.3.1.4 Empiri
29、cal formula NaAlO20,1 Na2O.nH2O (n varies from 0,3 to 0,4) 3.1.5 Chemical formula NaAlO2BS EN 882:2016EN 882:2016 (E) 7 3.1.6 CAS Registry Number 1)1302-42-7 12251-53-5 3.1.7 EINECS reference 2)215-100-1 235-487-0 3.2 Commercial form Sodium aluminate is available as solids (powder or granules) or so
30、lutions. 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/cm3. The tamped bulk density (powder) is between 1 g/cm3to 1,2 g/cm3(depends on grain size). The density of solu
31、tions 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 (concentration higher than 400 g/l). NOTE Depending on temperature
32、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 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: approximatel
33、y 1 650 C 1)Chemical Abtracts Service Registry Number. 2)European inventory of Existing Commercial chemicals Substances. 3)100 kPa = 1 bar BS EN 882:2016EN 882:2016 (E) 8 Solution typical values for crystallization point range between - 15 C and - 25 C 3.3.7 Specific heat Not known 3.3.8 Viscosity (
34、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 - 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
35、 Not applicable 3.3.10 Critical pressure Not applicable 3.3.11 Physical hardness Solid not known Solution not applicable 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 le
36、vel or neutralized. NOTE Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH value and it is advised to use the product within an appropriate pH range. When dissolved in drinking water, calcium is partially precipitated with aluminium hydroxide. BS EN 88
37、2:2016EN 882:2016 (E) 9 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for 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 ma
38、nufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. 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
39、 consumption, taking into account raw water quality, required dosage, contents of other impurities and additives 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 curr
40、ent production process and raw materials. If the production process or raw materials leads to significant quantities 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 p
41、roduct, expressed as a mass fraction of aluminium in the product (Al %) shall be within 3 % of the manufacturers 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
42、 forms 10 to 13,2 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 8 (solid product) max NOTE The value quoted for iron is both iron (II) and iron (III).
43、Iron 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. BS EN 882:2016EN 882:2016 (E) 10 Table 3 Chemical parameters Parameter Limit mg/kg of Al type 1 type 2 t
44、ype 3 Arsenic (As) max. 14 40 100 Cadmium (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 o
45、f the product. Pesticides and polycyclic 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. 5 Test methods 5.1 Sampling 5.1.1 General Observe the g
46、eneral 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 5.1.3.1.1 General 5.1.3.1.1.1 Mix the contents of each container to be sample
47、d 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 bottle) that it is impracticable to use a sampling implement, take a samp
48、le 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 as described in 5.1.3.1.2; otherwise, take samples as described in 5.
49、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 completely and allow BS EN 882:2016EN 882:2016 (E) 11 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 Botto
