1、BRITISH STANDARD BS EN 883:2004 Chemicals used for treatment of water intended for human consumption Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate The European Standard EN 883:2004 has the status of a British Standard ICS 71.100.80 BS EN 883:2004 This British Standard
2、 was published under the authority of the Standards Policy and Strategy Committee on 2 December 2004 BSI 2 December 2004 ISBN 0 580 44944 0 National foreword This British Standard is the official English language version of EN 883:2004. It supersedes BS EN 883:1997 which is withdrawn. The UK partici
3、pation 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 Standards which implement in
4、ternational 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. This publication does not p
5、urport 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 international/European commi
6、ttee 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 title page, pages 2 to 1
7、8, 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 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 883 November 2004 ICS 71.100.80 Supersedes EN 883
8、:1997 English version Chemicals used for treatment of water intended for human consumption - Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Polyhydroxychlorure daluminium et Polyhyd
9、roxychlorosulfate daluminium Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Polyaluminiumchloridhydroxid und Polyaluminiumchloridhydroxidsulfat This European Standard was approved by CEN on 30 September 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulati
10、ons 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. This Europ
11、ean 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 Central Secretariat has the same status as the official versions. CEN members are the natio
12、nal standards bodies of Austria, Belgium, Cyprus, Czech Republic, 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. EURO
13、PEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION 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 883:2004: EEN 883:2004 (E)
14、 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 - Storage11 Annex A (informative) General information on polyaluminium chloride and polyaluminium chloride hydroxide sulfate 14 Annex B (nor
15、mative) General rules relating to safety17 Bibliography 18 EN 883:2004 (E) 3 Foreword This document (EN 883:2004) has been prepared by 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, ei
16、ther 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 883:1997. Significant technical differences between this edition and EN 883:1997 are as follows: a) repl
17、acement 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“ Quality of commercial product“ According to the CEN/CENELEC Intern
18、al 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl
19、ands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 883:2004 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this document: a) this document provides
20、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 verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product
21、 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 product covered by this document id subject to regulation or control by National Authorities. EN 883:2004 (E) 5 1 Scope Th
22、is document is applicable to polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate used for treatment of water intended for human consumption. It describes the characteristics and specifies the requirements of polyaluminium chloride hydroxide and polyaluminium chloride hydrox
23、ide sulfate and refers to the corresponding analytical methods. It gives information for their use in water treatment. It also determines the rules relating to safe handling and use of these aluminium salts (see Annex B). 2 Normative references The following referenced documents are indispensable fo
24、r 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 1302, Chemicals used for treatment of water intended for human consumption Aluminium based coagulants
25、 Analytical methods. 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 3.1.1 Chemical names a) Polyaluminium chloride hydroxide; b) Polyaluminium chloride hydroxide sulfa
26、te. 3.1.2 Synonym or common names a) Polyaluminium chloride, PAC, PACl ; basic aluminium chloride, BAC. NOTE In 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 E
27、mpirical formula a) Al(OH) a Cl bwith (a + b) = 3 and a greater than 1,05; b) Al(OH) a Cl b (SO 4 ) cwith (a + b + 2c) = 3 and a greater than 1,05. 3.1.5 Chemical formula Variable (see 3.1.4). EN 883:2004 (E) 6 3.1.6 CAS Registry Number 1)(a 1 ) a and b variable : 1327-41-9 with a greater than 1,05;
28、 (a 2 ) a = 2,5 ; b = 0,5 : 12042-91-0; (a 3 ) a = 2 ; b = 1 : 10284-64-7; (b) a, b and c variable : 39290-78-3 with a greater than 1,05. 3.1.7 EINECS reference 2)(a 1 ) 215-477-2; (a 2 ) 234-933-1; (a 3 ) 233-632-2; (b) 254-400-7. 3.2 Commercial forms These products are generally available as liqui
29、ds. 3.3 Physical properties 3.3.1 Appearance The product is colourless to yellow. 3.3.2 Density The density depends on the particular composition, especially the aluminium ion content, expressed as mass fraction of aluminium (Al %). Typical values: a) Polyaluminium chloride hydroxide : 1,35 g/ml to
30、1,40 g/ml for 9,5 % Al ; b) Polyaluminium chloride hydroxide sulfate: 1,18 g/mlto 1,22 g/ml for 5,3 %Al ; 1,16 g/ml for 4,2 % Al . 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. EN 883:2004 (E) 7 3.3.3 Solubility All polyaluminium chl
31、oride hydroxides and polyaluminium chloride hydroxide sulfates are fully miscible with water. NOTE Depending on the particular product, dilute solutions can hydrolyze and form a precipitate. 3.3.4 Vapour pressure Not known. 3.3.5 Boiling point at 100 kPa 3)Not known. 3.3.6 Crystallization point Typi
32、cal values for solutions: a) Polyaluminium chloride hydroxide: - 20 C for 9,5 % Al ; 0 C for 12,4 % Al ; b) Polyaluminium chloride hydroxide sulfate: - 10 C to - 15 C for 5,3 % Al ; - 5 C for 4,2 % Al.3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Typical values for solutions at 20 C: a) P
33、olyaluminium chloride hydroxide : 10 mPa.s to 50 mPa.s for 9,5 % Al ; b) Polyaluminium chloride hydroxide sulfate : 3 mPa.s to 10 mPa.s for 5,3 % Al . 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3) 100 kPa = 1 bar. EN 8
34、83:2004 (E) 8 3.4 Chemical properties Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate are acidic liquids which hydrolyze and form a precipitate of aluminium hydroxide when diluted beyond a particular level. NOTE 1 Since aluminium compounds are amphoteric in nature, the
35、solubility of aluminium depends on the pH value and the products should be used within an appropriate pH range. NOTE 2 A characteristic of these products is their high tendency to hydrolyze which restricts their use; this tendency results from the particular oligomeric or polymeric composition. Thes
36、e products vary in their relative basicity (mole ratio OH/3Al), the percentage of chloride and sulfate ions present and in their method of manufacture. NOTE 3 These variations may affect their performance in the water treatment plant. Special water plant requirements regarding, but not limited to, s
37、uch items as: organic matter removal, residual aluminium levels and working pH values should be specified when possible, so that the product which best fits the need can be offered. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for polyaluminium chloride hydro
38、xide and polyaluminium chloride hydroxide sulfate 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 not
39、ified to the user and when necessary to relevant authorities. NOTE Users of these products 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, cont
40、ents of other impurities and additives used in the products 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 ra
41、w materials lead 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 (aluminium ion content) in the commercial product expressed as grams per kilogram of product
42、shall be within 3 % of the manufacturers declared values. NOTE The concentration of water- soluble aluminium in commercial products varies. Typical values of aluminium content in the products can be between 42 g/kg and 124 g/kg. The commercial products vary in the proportions of chloride and sulfate
43、 ions. The 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. EN 883:2004 (E) 9 4.3 Impurities and main by-products Impurities derived from the manufacturing or extraction processes i
44、nclude insoluble matter, trace metals and organic compounds. 4.4 Chemical parameters The products shall conform to the requirements specified in Table 1. Table 1 Chemical parameters Parameter Limit (mg/kg of Al) type 1 type 2 type 3 Arsenic (As) max. 14 40 100 Cadmium (Cd) max. 3 50 100 Chromium (Cr
45、) 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 polycyclic aromatic hydrocarbons are not
46、relevant since the raw materials used in the manufacturing process are free of them. For maximum impact of these products on trace metal content in drinking water see A.2. EN 883:2004 (E) 10 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations of ISO 3165 and take into accou
47、nt ISO 6206. 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, taking care not to damage the container or spill any of the liquid. 5.1.2.1.1.2
48、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 described in 5.1.1.2.1.3. 5.1.2.1.1.3 Examine the surface of the liquid. If
49、 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 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 any liquid adhering to the ladle to drain off. If necessary, repeat this operation so that
