1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21192-9 SANS 50887:2008Edition 1EN 887:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for hum
4、an consumption Aluminium iron (lll) sulfate This national standard is the identical implementation of EN 887:2004 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 4
5、28 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50887:2008 Edition 1 EN 887:2004 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 5140.19, Water, in accordance
6、 with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March 2008. 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
7、 water intended for human consumption - Aluminium iron (III) sulfate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Sulfate daluminium et de fer (III) Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Aluminium-Eisen(III)-sulfat This Europea
8、n 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 lists and bibliographical references co
9、ncerning 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 responsibility of a CEN member into its o
10、wn 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, Ireland, Italy, Latvia, Lithuania, Luxemb
11、ourg, 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-1050 Brussels 2004 CEN All rights of ex
12、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 887:2004: ESANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 N
13、ormative references 5 3 Description .5 4 Purity criteria8 5 Test methods9 6 Labelling - Transportation - Storage11 Annex A (informative) General information on aluminium iron (III) sulfate13 Annex B (normative) General rules relating to safety.17 Bibliography 18 SANS 50887:2008This s tandard may onl
14、y be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 3 Foreword This document (EN 887:2004) 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 o
15、f 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 887:2001. Significant technical differences between this edition and EN 887:200
16、1 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 commercial product“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of
17、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, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spai
18、n, Sweden, Switzerland and United Kingdom. SANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by
19、 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 verifiable European criteria, existing national regulati
20、ons 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 product covered by this document is subject to regulation
21、 or control by National Authorities. SANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 5 1 Scope This document is applicable to aluminium iron (III) sulfate used for treatment of water intended for human consumpti
22、on. 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 relating to safe handling and use
23、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 referenced document (including any
24、 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 industrial use Sampling Vocabulary. IS
25、O 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 Aluminium and iron sulfate. 3.1.3 Re
26、lative molecular mass Variable (see 3.1.4). 3.1.4 Empirical formula (Alx Fe1-x)2(SO4)3where x is 0,70 to 0,95. 3.1.5 Chemical formula xAl2(SO4)3. (1 - x) Fe2(SO4)3. n H2O where n is variable and x varies from 0,70 to 0,95. SANS 50887:2008This s tandard may only be used and printed by approved subscr
27、iption and freemailing clients of the SABS .EN 887:2004 (E) 6 3.1.6 CAS Registry Number1)The following is a list of CAS Registry Numbers for the components: Al2(SO4)3: 10043-01-3; Fe2(SO4)3: 10028-22-5. 3.1.7 EINECS reference2)The following is a list of EINECS reference numbers for the components: A
28、l2(SO4)3: 233-135-0; Fe2(SO4)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 Appearance The product is a yellow to brown s
29、olid 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 product is approximately 0,9 g/cm3. 3.3.3 Solu
30、bility 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 Fe in solution. 3.3.4 Vapour pressure at 20 C
31、Not known. 1)Chemical Abstracts Service Registry Number. 2)European Inventory of Existing Commercial Chemical Substances. SANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 7 3.3.5 Boiling point at 100 kPa3)120 C f
32、or 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 viscosity of
33、 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 Temperature Viscosity
34、 (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 and form a p
35、recipitate 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. SANS 50887:2008This s tandard may only be used and printed by approved subscripti
36、on and freemailing clients of the SABS .EN 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 pro
37、duct. 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 relevant authorities. NOTE Users of this product should check the national regulations in order to clarify whether it is of appropria
38、te purity for treatment of 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 t
39、o be present in significant 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
40、 concentration of active 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. Typ
41、ical values for concentration 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 excee
42、d: 25 g/kg of Al + Fe for 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 mat
43、ter consist of unreacted silica (SiO2) and/or aluminium and iron silicates, in various proportions. SANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 9 4.4 Chemical parameters The product shall conform to the requ
44、irements specified in Table 2. Table 2 Chemical parameters 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.
45、 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 product on
46、trace metal content in drinking water see A.2. 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 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 dru
47、ms and bottles 5.1.3.1.1 General 5.1.3.1.1.1 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. 5.1.3.1.1.2 If the design of the container is such (for example
48、, 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 5.1.3.1.1.3. 5.1.3.1.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take sam
49、ples from the surface as described in 5.1.3.1.2; otherwise, take samples as described in 5.1.3.1.3. SANS 50887:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 887:2004 (E) 10 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 any liquid adhering to the ladle to drain off. If nec
