1、BRITISH STANDARD BS EN 887:2004 Chemicals used for treatment of water intended for human consumption Aluminium iron (III) sulfate The European Standard EN 887:2004 has the status of a British Standard ICS 71.100.80 Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSI
2、BS EN 887:2004 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 44947 5 National foreword This British Standard is the official English language version of EN 887:2004. It supersedes BS EN 887:200
3、1 which is withdrawn. 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
4、British Standards 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
5、 Online. This 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 resp
6、onsible international/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 co
7、ver, the EN 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 02:47:55 GMT 2005, Uncontr
8、olled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 887 November 2004 ICS 71.100.80 Supersedes EN 887:2001 English version Chemicals used for treatment of water intended for human consumption - Aluminium iron (III) sulfate Produits chimiques utiliss pour le traitement de leau de
9、stine la consommation humaine - Sulfate daluminium et de fer (III) Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Aluminium-Eisen(III)-sulfat This European Standard was approved by CEN on 30 September 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulation
10、s 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 Europea
11、n 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 nationa
12、l 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. EUROPE
13、AN 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 887:2004: E Licensed Copy: W
14、ang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 Purity criteria8 5 Test methods9 6 Labelling - Transportation - Storage11 Annex A (informative) General information on
15、aluminium iron (III) sulfate13 Annex B (normative) General rules relating to safety.17 Bibliography 18 Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 3 Foreword This document (EN 887:2004) has been prepared by Technical Committee CEN/TC 164 “Wate
16、r 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. Thi
17、s document supersedes EN 887:2001. Significant technical differences between this edition and EN 887:2001 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 commerci
18、al 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, Ital
19、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 4 Introduction In respect of potential adverse effec
20、ts 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 awaiting the
21、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 or EFTA. The
22、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 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 5 1 Scope This document is applicable to aluminium iron (III) sulfate used for treatment of wa
23、ter intended for human consumption. It describes the characteristics of aluminium iron (III) sulfate and specifies the requirements for aluminium iron (III) sulfate and refers to the corresponding analytical methods. It gives information on its use in water treatment. It also determines the rules re
24、lating to safe handling and use of aluminium iron (III) sulfate (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 re
25、ferenced document (including any amendments) applies. EN 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 indust
26、rial use Sampling Vocabulary. ISO 8213, Chemical 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 iron (III) sulfate. 3.1.2 Synonym or common name Alum
27、inium and iron sulfate. 3.1.3 Relative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula (Al x Fe 1-x ) 2(SO 4 ) 3where x is 0,70 to 0,95. 3.1.5 Chemical formula xAl 2 (SO 4 ) 3 . (1 - x) Fe 2 (SO 4 ) 3 . n H 2 O where n is variable and x varies from 0,70 to 0,95. Licensed Copy: Wang Bin,
28、 na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 6 3.1.6 CAS Registry Number 1 )The following is a list of CAS Registry Numbers for the components: Al 2 (SO 4 ) 3 : 10043-01-3; Fe 2 (SO 4 ) 3 : 10028-22-5. 3.1.7 EINECS reference 2)The following is a list of EINECS referen
29、ce numbers for the components: Al 2 (SO 4 ) 3 : 233-135-0; Fe 2 (SO 4 ) 3 : 233-072-9. 3.2 Commercial forms Aluminium iron (III) sulfate is available in solid hydrated forms, with different particle sizes (slabs, kibbled, ground, granulated), and as aqueous solutions. 3.3 Physical properties 3.3.1 A
30、ppearance The product is a yellow to brown solid or liquid. 3.3.2 Density The density of aluminium iron (III) sulfate solution varies depending on the composition. For example: 1,330 g/ml for solution containing 36 g/kg of Al and 15 g/kg of Fe at 15 C. The bulk density (loose) of granulated solid pr
31、oduct is approximately 0,9 g/cm 3 . 3.3.3 Solubility in water The solubility of aluminium iron (III) sulfate varies depending on the content of iron. For example: for a solid form containing 72 g/kg of aluminium and 30 g/kg of iron , at 0 C the solubility is : 36 g/kg of Al in solution ; 15 g/kg of
32、Fe in solution. 3.3.4 Vapour pressure at 20 C Not known. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 7 3.3.5 Boiling point at 100 kP
33、a 3)120 C for a saturated solution. 3.3.6 Crystallization point The crystallization point of aluminium iron (III) sulfate varies, depending on the composition. For example: 13 C for composition containing 36 g/kg of Al and 15 g/kg of Fe. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) The v
34、iscosity of aluminium iron (III) sulfate solution varies greatly, depending on the composition and content of insoluble matters. For a typical commercially available solution with a composition containing36 g/kg of Al and 15 g/kg of Fe, the viscosity is given in Table 1. Table 1 Viscosity Temperatur
35、e Viscosity (C) (mPas) - 5 62 0 49 10 29 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Aluminium iron (III) sulfate is a slightly acidic hydrated salt or solution. Very dilute solutions hydrolyze a
36、nd form a precipitate of aluminium hydroxide and iron hydroxide. NOTE The solubility of aluminium and the solubility of iron depend on the pH value and the product should be used within an appropriate pH range. 3)100 kPa = 1 bar. Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolle
37、d Copy, (c) BSIEN 887:2004 (E) 8 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for aluminium iron (III) sulfate used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Depending on the ra
38、w material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary 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 o
39、f water intended for human consumption, taking into account raw water quality, required dosage, contents 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 significa
40、nt quantities from the current production process and raw materials. If the production process or raw 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
41、matter (aluminium and iron ion contents) in the commercial product expressed as grams per kilogram of product shall be within 3 % of the manufacturers declared values. NOTE The concentration of water-soluble aluminium and water-soluble iron in commercial products varies. Typical values for concentra
42、tion of active matter depending on the forms are given here below: Al g/kg of product Fe g/kg of product Solid forms 68 to 80 35 to 12 Solution forms 26 to 40 21 to 6 4.3 Impurities and main by-products In solid hydrated forms, the content of insoluble matter shall not exceed: 25 g/kg of Al + Fe for
43、 type 1 and type2; 30 g/kg in commercial product for type 3. In solutions, the content of insoluble matter shall not exceed: 25 g/kg of Al + Fe for type 1 and type2; 15 g/kg in commercial product for type 3. NOTE 1 The three types are defined in Table 2. NOTE 2 Insoluble matter consist of unreacted
44、silica (SiO 2 ) and/or aluminium and iron silicates, in various proportions. Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 9 4.4 Chemical parameters The product shall conform to the requirements specified in Table 2. Table 2 Chemical parameters
45、Limit mg/kg of Al + Fe 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) max. 20 40 120 Selenium (Se) max. 20 40 120 NOTE Cyanide (CN -
46、) 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 product on trace metal content in drinking water see A.2. 5 Test met
47、hods 5.1 Sampling 5.1.1 General Observe the general rules 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 cont
48、ents 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. 5.1.3.1.1.2 If the design of the container is such (for example, a narrow-necked bottle) that it is impracticable to use
49、 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 as described in 5.1.3.1.2; otherwise, take samples as described in 5.1.3.1.3. Licensed Copy: Wang Bin, na, Wed Mar 16 02:47:55 GMT 2005, Uncontrolled Copy, (c) BSIEN 887:2004 (E) 10 5.1.3.1.2 Su
