1、BRITISH STANDARD BS EN 886:2004 Chemicals used for treatment of water intended for human consumption Polyaluminium hydroxide silicate sulfate The European Standard EN 886:2004 has the status of a British Standard ICS 71.100.80 BS EN 886:2004 This British Standard was published under the authority of
2、 the Standards Policy and Strategy Committee on 2 December 2004 BSI 2 December 2004 ISBN 0 580 44946 7 National foreword This British Standard is the official English language version of EN 886:2004. It supersedes BS EN 886:2001 which is withdrawn. The UK participation in its preparation was entrust
3、ed 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 international or European publications
4、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 purport to include all the necessary p
5、rovisions 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 committee any enquiries on the interpretat
6、ion, 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 16, an inside back cover and a back co
7、ver. 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 886 November 2004 ICS 71.100.80 Supersedes EN 886:2001 English version Chemicals used
8、for treatment of water intended for human consumption - Polyaluminium hydroxide silicate sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Polyhydroxysulfatesilicate daluminium Produkte zur Aufbereitung von Wasser fr den Menschlichen Gebrauch - Polyalumi
9、niumhydroxidsilikatsulfat 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 European Standard the status of a national standard without any alteration. Up-to-date l
10、ists 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, French, German). A version in any other language made by translation under the res
11、ponsibility 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 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ire
12、land, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1
13、050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 886:2004: EEN 886:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 Purity criteria8 5 Test methods9 6 Labelli
14、ng - Transportation - Storage10 Annex A (informative) General information on polyaluminium hydroxide silicate sulfate12 Annex B (normative) General rules relating to safety15 Bibliography 16 EN 886:2004 (E) 3 Foreword This document (EN 886:2004) has been prepared by Technical Committee CEN/TC 164 “W
15、ater 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005.
16、This document supersedes EN 886:2001. Significant technical differences between this edition and EN 886:2001 are as follows: a) replacement of the reference to EU Directive 80/778 of July, 15 1980 with the latest Directive in force (see1); b) expansion of annex A by addition of A.2 “quality of comme
17、rcial 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, Ireland, I
18、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 886:2004 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product c
19、overed by this document: 1) 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; 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning
20、 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 product covered by this document is subject to regulation or control by
21、 National Authorities. EN 886:2004 (E) 5 1 Scope This document is applicable to polyaluminium hydroxide silicate sulfate used for treatment of water intended for human consumption. It describes the characteristics of polyaluminium hydroxide silicate sulfate and specifies the requirements for polyalu
22、minium hydroxide silicate sulfate and refers to the corresponding analytical methods. It gives information on its use in water treatment. It also determines the rules to safe handling and use of polyaluminium hydroxide silicate sulfate (see annex B). 2 Normative references The following referenced d
23、ocuments 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 1302, Chemicals used for treatment of water intended for human consumpti
24、on - 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. 3 Description 3.1 Identification 3.1.1 Chemical name Polyaluminium hydroxide silicate sulfate.
25、3.1.2 Synonym or common names Polyaluminium silicate sulfate, PASS. 3.1.3 Relative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula Polyaluminium hydroxide silicate sulfate is a synthetically manufactured polymerized basified aluminium salt containing silicate. The structure of the produ
26、ct is polymeric. Al(OH) a (SO 4 ) b (SiOx) cwith a + 2b + 2c (x 2) = 3 and a = 1,05 to 2,0 b = 0,30 to 1,12 c = 0,005 to 0,10 x = 2,0 to 4,0 3.1.5 Chemical formula Variable (see 3.1.4). EN 886:2004 (E) 6 3.1.6 CAS Registry Number 1)(Aluminium hydroxide silicate sulfate): 131148-05-5. 3.1.7 EINECS re
27、ference 2)The following is a list of EINECS reference numbers for products or their starting materials. Basic aluminium sulfate, PAS 259-881-7 Aluminosilicate 215-475-1 Sodium sulfate 231-820-9 3.2 Commercial form The product is available as a liquid. 3.3 Physical properties 3.3.1 Appearance Polyalu
28、minium hydroxide silicate sulfate is a colourless, slightly opalescent liquid. 3.3.2 Density The density depends on the particular composition, especially the aluminium ion content, expressed as a mass fraction of aluminium (Al) in %. Typical value is 1,25 g/ml for 4,2 % Al. 3.3.3 Solubility in wate
29、r Polyaluminium hydroxide silicate sulfate is fully miscible with water. NOTE Depending on the particular product, dilute solutions can hydrolyse and form a precipitate. 3.3.4 Vapour pressure at 20 C Not known. 3.3.5 Boiling point at 100 kPa 3)100 C. 3.3.6 Crystallization point Typical value is 0 C
30、for 4,2 % Al. 3.3.7 Specific heat Not known. 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. EN 886:2004 (E) 7 3.3.8 Viscosity (dynamic) Typical value is 11 mPa.s for 4,2 % Al at 25 C. 3.3.9 Critical temperature Not
31、 applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable 3.4 Chemical properties Polyaluminium hydroxide silicate sulfate is a mildly acidic liquid which hydrolyses and forms a precipitate of aluminium hydroxide when diluted beyond a particular concentration. NOT
32、E Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH value and the product should be used within an appropriate pH range. EN 886:2004 (E) 8 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for polyaluminium hydroxide
33、 silicate 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 necessary to
34、relevant authorities. NOTE Users of the 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 additives used
35、 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 in the production process or raw materials lead to significant quantitie
36、s 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 product expressed as grams per kilogram of product shall be not less than 40 g/kg. The content of alumi
37、nium shall be within 3 % of the manufacturers declared value. The relative basicity expressed as the mole ratio OH/3Al shall be greater than 0,35. 4.3 Impurities and main by-products The content of insoluble matter shall not exceed 25 g/kg of Al. 4.4 Chemical parameters The product shall conform to
38、the requirements specified in Table 1. Table 1 Chemical parameters Limit (mg/kg of Al) Parameter type 1 type 2 type 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)
39、 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 relevant since the raw materials used in the manufacturing process are free of them. For maximum impact of the prod
40、uct on trace metal content in drinking water see A.2. EN 886:2004 (E) 9 5 Test methods 5.1 Sampling 5.1.1 General Observe the general rules of ISO 3165 and take into account ISO 6206 5.1.2 Sampling from drums and bottles 5.1.2.1 General 5.1.2.1.1 Mix the contents of each container to be sampled by s
41、haking 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. 5.1.2.1.2 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 po
42、uring after the contents have been thoroughly mixed. Otherwise, proceed as described in 5.1.2.1.3. 5.1.2.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take samples from the surface as described in 5.1.2.2; otherwise, take samples as described in 5.1.2.3. 5.1.2.2
43、 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 th
44、is 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. 5.1.2.3 Bottom sampling Take a sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container
45、 and the viscosity of the liquid. When using an open sampling tube, close it at the top and then lower the bottom end to the bottom of the container. Open the tube and move it rapidly so that the bottom of the tube traverses the bottom of the container before the tube is filled. Close the tube, with
46、draw it from the container and allow any liquid adhering to the outside of the tube to drain off. When using a bottom-valve sampling tube, close the valve before lowering the tube into the container and then proceed in a similar manner to that when using an open sampling tube. 5.1.2.4 Sampling from
47、tanks and tankers From each access point, take samples as follows: a) from the surface of the liquid, using a ladle as described in 5.1.2.2; b) from the bottom of the tank or tanker, using a sampling tube as described in 5.1.2.3 or using specially designed bottom-sampling apparatus; c) from one or m
48、ore positions, depending on the overall depth, between the bottom and the surface using a weighted sampling can. 5.2 Analyses Use the relevant methods described in EN 1302. EN 886:2004 (E) 10 6 Labelling - Transportation - Storage 6.1 Means of delivery The product shall be delivered in tankers of co
49、rrosion-resistant materials suitable for the purpose. NOTE The manufacturer can provide advice on suitable materials. In order that the purity of the product is not affected, the means of delivery shall not have been used previously for any different product or it shall have been specially cleaned and prepared before use. 6.2 Risk and safety labelling according to the EU-Directives 4)The following labelling requirements shall apply to polyaluminium hydroxide silicate sulfate at the dat