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 978-0-626-20593-5 SANS 50885:2007Edition 1EN 885:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for hum
4、an consumption Polyaluminium chloride hydroxide silicate This national standard is the identical implementation of EN 885:2004 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 00
5、01 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50885:2007 Edition 1 EN 885:2004 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 5140.19A, Water,
6、 in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in November 2007. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 885 November 2004 ICS 71.100.80 Supersedes EN 885:2001 English version Chemicals used
7、 for treatment of water intended for human consumption - Polyaluminium chloride hydroxide silicate Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Polyhydroxychlorosilicate daluminium Produkte zur Aufbereitung von Wasser fr den Menschlichen Gebrauch - Polyalum
8、iniumhydroxidchloridsilikat 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
9、 lists 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 r
10、esponsibility 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, I
11、reland, 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
12、-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 885:2004: ESANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 2 Contents Page
13、 Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 Purity criteria8 5 Test methods9 6 Labelling - Transportation - Storage10 Annex A (informative) General information on polyaluminium chloride hydroxide silicate .12 Annex B (normative) General rules relating to safety15
14、 Bibliography 16 SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 3 Foreword This document (EN 885:2004) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFN
15、OR. 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. This document supersedes EN 885:2001. Significant tec
16、hnical differences between this edition and EN 885:2001 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 commercial product“. According to the CEN/CENELEC Internal
17、 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, Netherlan
18、ds, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 4 Introduction In respect of potential adverse effects on the qual
19、ity 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 ve
20、rifiable 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 pro
21、duct covered by this document is subject to regulation or control by National Authorities. SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 5 1 Scope This document is applicable to polyaluminium chloride hydroxid
22、e silicate used for treatment of water intended for human consumption. It describes the characteristics of polyaluminium chloride hydroxide silicate and specifies the requirements for polyaluminium chloride hydroxide silicate and refers to the corresponding analytical methods. It gives information o
23、n its use in water treatment. It also determines the rules relating to safe handling and use of polyaluminium chloride hydroxide silicate (see annex B). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the ed
24、ition 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 Analytical methods. ISO 3165, Sampling of chemical products for indu
25、strial use Safety in sampling. ISO 6206, Chemical products for industrial use Sampling Vocabulary. 3 Description 3.1 Identification 3.1.1 Chemical name Polyaluminium chloride hydroxide silicate. 3.1.2 Synonym or common name Polyaluminium chloride silicate. 3.1.3 Relative molecular mass Variable (see
26、 3.1.4). 3.1.4 Empirical formula Polyaluminium chloride hydroxide silicate is a synthetically manufactured polymerized basified aluminium salt containing silicate. The structure of the product is polymeric. Al(Na)d(OH)a(SiOx)cClbwith a + b + 2c (x 2) = 3 + d and a = 1,05 to 2,4 b = 0,5 to 3 c = 0,01
27、 to 0,3 d = 0,005 to 2 x 2 SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 6 3.1.5 Chemical formula Variable (see 3.1.4). 3.1.6 CAS Registry Number1)Aluminium chloride hydroxide silicate: 94894-80-1. 3.1.7 EINEC
28、S reference2)The following is a list of EINECS reference numbers for products or their starting materials. Aluminium hydroxide chloride: 215-477-2. Aluminosilicate: 215-475-1. Sodium chloride: 231-598-3. 3.2 Commercial form The product is available as a liquid. 3.3 Physical properties 3.3.1 Appearan
29、ce Polyaluminium chloride hydroxide silicate is a colourless to yellow, clear 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 values are 1,20 g/ml to 1,25 g/ml for 5,3 % Al. 3.
30、3.3 Solubility in water Polyaluminium chloride hydroxide silicate 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 kPa3)100 C. 1) Chemical Abstracts Servi
31、ce Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. 3) 100 kPa = 1 bar. SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 7 3.3.6 Crystallization point Typical value is - 10 C for
32、 5,3 % Al. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Typical value is 15 mPa.s for 5,3 %Al at 20 C. 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 Polyaluminium chloride hydroxide sil
33、icate is an acidic liquid which hydrolyses and forms a precipitate of aluminium hydroxide when diluted beyond a particular concentration. NOTE 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
34、pH range. SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (E) 8 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for polyaluminium chloride hydroxide silicate used for the treatm
35、ent 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 relevant authorities. NOTE Us
36、ers 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 in the product not stated in
37、 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 quantities of impurities, by-products
38、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 shall be not less than 50 g/kg. The content of aluminium shall be with
39、in 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 matters shall not exceed 25 g/kg of Al. 4.4 Chemical parameters The product shall conform to the requirements
40、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) max. 20 40 120 S
41、elenium (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 trace metal
42、content in drinking water see A.2. SANS 50885:2007This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 885:2004 (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
43、from drums and bottles 5.1.2.1 General 5.1.2.1.1 Mix the contents of each 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. 5.1.2.1.2 If the design of the container is such (for exam
44、ple, 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 5.1.2.3. 5.1.2.1.3 Examine the surface of the liquid. If there are signs of surface contamination, take sample
45、s from the surface as described in 5.1.2.2; otherwise, take samples as described in 5.1.2.3. 5.1.2.2 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
46、it fills completely and allow 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. 5.1.2.3 Bottom sampling Take a
47、sample using an open sampling tube, or a bottom-valve sampling tube, suited to the size of container 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 bott
48、om of the tube traverses the bottom of the container before the tube is filled. Close the tube, withdraw 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 a
49、nd then proceed in a similar manner to that when using an open sampling tube. 5.1.3 Sampling from 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 more positions, depending on the overall depth, between the bottom and the surface using a weighted sampling can. 5.2 Analyses Use the relevant methods for
