SANS 50888-2008 Chemicals used for treatment of water intended for human consumption - Iron (III) chloride《人用水处理作业中使用的化学品 氯化铁(III)》.pdf

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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 978-0-626-21423-4 SANS 50888:2008Edition 1EN 888:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for hum

4、an consumption Iron (III) chloride This national standard is the identical implementation of EN 888:2004 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: 012 428 7911 f

5、ax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50888:2008 Edition 1 EN 888:2004 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 with pro

6、cedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in April 2008. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 888 November 2004 ICS 71.100.80 Supersedes EN 888:1998 English version Chemicals used for treatment of water in

7、tended for human consumption - Iron (III) chloride Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Chlorure de fer (III)Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Eisen(III)chlorid This European Standard was approved by CEN on 30 Septe

8、mber 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 concerning such national standards may be ob

9、tained 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 own language and notified to the Central Se

10、cretariat 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, Luxembourg, Malta, Netherlands, Norway, Poland,

11、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 exploitation in any form and by any means re

12、served worldwide for CEN national Members. Ref. No. EN 888:2004: ESANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 P

13、urity criteria8 5 Test methods10 6 Labelling Transportation Storage 13 Annex A (informative) General information on iron (III) chloride .15 Annex B (normative) Analytical methods .19 Annex C (informative) Reduction of Fe (III) on a silver column34 Annex D (informative) Determination of cadmium, chro

14、mium, nickel and lead (inductively coupled plasma optical emission spectrometry (ICP/OES) .35 Bibliography 37 SANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 3 Foreword This document (EN 888:2004) has been prepa

15、red 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, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall

16、be withdrawn at the latest by May 2005. This document supersedes EN 888:1998. Significant technical differences between this edition and EN 888:1998 are as follows: a) replacement of the reference to EU Directive 80/778 of 15 July 1980 with the latest Directive in force (see1); b) expansion of annex

17、 A by addition of A.2 “Quality of commercial product“; c) deletion of annex E. 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,

18、 Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SANS 50888:2008This s tandard may only be used and printed by approved subscription and

19、 freemailing clients of the SABS .EN 888:2004 (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 no information as to whether the product may be used without rest

20、riction 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 remain in force. NOTE Conformity with this standard does not con

21、fer 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 National Authorities. SANS 50888:2008This s tandard may only be used and printed by approved subscription and freem

22、ailing clients of the SABS .EN 888:2004 (E) 5 1 Scope This document is applicable to iron (III) chloride (a), iron (III) chloride hexahydrate(b), iron (III) chloride solution (c) used for treatment of water intended for human consumption. It describes the characteristics and specifies the requiremen

23、ts and the corresponding analytical methods for iron (III) chlorides (a), (b) and (c) (analytical methods are given in Annex B) and gives information for their use in water treatment. 2 Normative references The following referenced documents are indispensable for the application of this document. Fo

24、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 3696, Water for analytical laboratory use Specification and test methods (ISO 3696:1987). ISO 3165, Sampling of chemical products for i

25、ndustrial use Safety in sampling ISO 5790: 1979, Inorganic chemical products for industrial use General method for the determination of chloride content- Mercurimetric method ISO 6206, Chemical products for industrial use Sampling Vocabulary ISO 8213, Chemical products for industrial use Sampling te

26、chniques Solid chemical products in the form of particles varying from powders to coarse lumps 3 Description 3.1 Identification 3.1.1 Chemical name (a) iron (III) chloride (FeCl3). (b) iron (III) chloride hexahydrate (FeCl3 . 6 H2O). (c) iron (III) chloride solution. 3.1.2 Synonym or common names (a

27、) Ferric chloride, water free ferric chloride. (b) Ferric chloride hexahydrate. (c) Ferric chloride solution. 3.1.3 Relative molecular mass (a) 162,21.for FeCl3(b) 270,31.for FeCl3 . 6 H2O SANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of

28、the SABS .EN 888:2004 (E) 6 3.1.4 Empirical formula (a) FeCl3. (b) FeCl3 . 6 H2O. 3.1.5 Chemical formula (a) FeCl3. (b) FeCl3. 6 H2O. 3.1.6 CAS Registry Number 1)(a) and (c) 7705-08-0. (b) 10025-77-1. 3.1.7 EINECS reference 2)231-729-4. 3.2 Commercial forms Iron (III) chloride (a) is available as a

29、crystalline powder. Iron (III) chloride hexahydrate (b) is available as crystalline granules. Liquid forms of iron (III) chloride (c) are available as solutions. 3.3 Physical properties 3.3.1 Appearance Iron (III) chloride (a) is an hygroscopic, dark grey crystalline powder with a greenish sheen. Ir

30、on (III) chloride hexahydrate (b) is an hygroscopic, yellow deliquescent crystalline granular material. Liquid forms of iron (III) chloride (c) are dark brown solutions. 3.3.2 Density The density of iron (III) chloride (a) is equal to 2,89 g/cm3at 20 C. The density of iron (III) chloride hexahydrate

31、 (b) is equal to 1,8 g/cm3at 20 C. The density of solutions of iron (III) chloride(c) is equal to 1,43 g/ml at 20 C for a mass fraction of 40 % of FeCl3. The bulk density of the products (a) and (b) is about 1,0 kg/dm3. 1) Chemical Abstracts Service Registry Number 2) European Inventory of Existing

32、Commercial Chemical Substances SANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 7 3.3.3 Solubility (in water) The solubility at 20 C for the products (a) and (b) is approximately up to a mass fraction of 47 % of

33、FeCl3. The products (a), (b) and (c) can be diluted down to about a mass fraction of 1 % of FeCl3. Below this concentration, hydrolysis and formation of iron hydroxide will occur. 3.3.4 Vapour pressure For the product (a) 0,1 kPa at 20 C. 3.3.5 Boiling point at 100 kPa 3)For the product (a) decompos

34、ition occurs at 315 C. For the product (b) decomposition starts at 160 C. 3.3.6 Melting point For the product (a) 304 C (point of sublimation). For the product (b) 37 C. For the product (c) the melting and crystallization points depending on concentration are given in Table 1. Table 1 Melting point

35、Solution concentration Mass fraction of FeCl3 in %Melting, crystallization point C 34 -52 40 -12 45 +10 3.3.7 Specific heat For the product (a) 600 kJ/kg.K. For the product (b) not known. For the product (c) not applicable. 3.3.8 Viscosity (dynamic) For the products (a) and (b) it is not applicable.

36、 For the product (c) the viscosity is about 10 mPa.s for a solution of a mass fraction of 40 % of FeCl3at 20 C. 3) 100 kPa = 1 bar SANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 8 3.3.9 Critical temperature Not

37、 applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The solutions of iron (III) chloride (a) and iron (III) chloride hexahydrate of (b), and the liquid forms of iron (III) chloride (c) are acidic and highly corrosive. Very diluted so

38、lutions hydrolyse and form a precipitate of iron hydroxide. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for iron (III) chloride used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. D

39、epending 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 these products should check the national regulations in order to clarify whether it is of appropriate pu

40、rity for treatment of water intended for human consumption, taking account raw water quality, required dosage, contents of other impurities and additives used in the products not stated in this product standard. Limits have been given for impurities and chemical parameters where these are likely to

41、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. SANS 50888:2008This s tandard may only be u

42、sed and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 9 4.2 Composition of commercial product The concentration of active matter in the product expressed as mass fraction in % of FeCl3 orFe (III)shall be within 3 % of the manufacturers declared values.The prod

43、ucts shall conform to the following minimum requirements given in Table 2. Table 2 Minimum concentration of active matter Commercial form FeCl3 Mass fractionin % Fe (III) Mass fraction in % Solid (a) 99 34 Solid (b) 59 20,3 Solution (c) 40 13,7 The concentration of the solutions (c) shall be within

44、the manufacturers specifications. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 3. The concentration limits refer to Fe (III). Table 3 Impurities Limit Mass fraction of Fe (III) content in % Impurity Grade 1 Grade 2 Grade 3 Manganese max. 0,5 1

45、2 Iron(II)amax. 2,5 2,5 2,5 Insoluble mattersbmax. 0,2 0,2 0,2 aFe (II) has a lower coagulant efficiency compared to Fe (III). Also hydrolysis of Fe (II) starts at pH value 8, and therefore Fe (II) can remain into the water at lower pH values. ban excess of insoluble matters indicates the presence o

46、f foreign matter Iron is a component of the product will usually be removed in the treatment process. SANS 50888:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 888:2004 (E) 10 4.4 Chemical parameters The product shall conform to the r

47、equirements specified in Table 4. The concentration limits are specified in milligrams per kilogram of Fe (III). Table 4 Chemical parameters Limit mg/kg of Fe (III) Parameter type 1 type 2 type 3 Arsenic (As) max. 20 20 50 Cadmium (Cd) max. 1 25 50 Chromium (Cr) max. 50 350 500 Mercury (Hg) max. 0,3

48、 5 10 Nickel (Ni) max. 60 350 500 Lead (Pb) max. 35 100 400 Antimony (Sb) max. 10 20 60 Selenium (Se) max. 10 20 60 NOTE Cyanide (CN-),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 ir

49、on (III) chloride on trace metal content in drinking water see A.2. 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations in ISO 3165 and take into account ISO 6206. 5.1.2 Solid Prepare the laboratory sample 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 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