SANS 50890-2008 Chemicals used for treatment of water intended for human consumption - Iron (III) sulfate liquid《人用水处理作业中使用的化学品 铁(III)硫酸液》.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 978-0-626-21425-8 SANS 50890:2008Edition 1EN 890:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Chemicals used for treatment of water intended for hum

4、an consumption Iron (III) sulfate liquid This national standard is the identical implementation of EN 890:2004 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

5、7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50890:2008 Edition 1 EN 890:2004 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 wi

6、th procedures 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 890 November 2004 ICS 71.100.80 Supersedes EN 890:1998 English version Chemicals used for treatment of wa

7、ter intended for human consumption - Iron (III) sulfate liquid Produits chimiques utiliss pour le traitement de leau destine la consommation humaine - Sulfate de fer (III) Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Eisen (III) sulfat This European Standard was approved by CE

8、N 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 concerning such national standa

9、rds 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 own language and notified to t

10、he 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, Luxembourg, Malta, Netherlands, Nor

11、way, 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 exploitation in any form and by

12、 any means reserved worldwide for CEN national Members. Ref. No. EN 890:2004: ESANS 50890:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Descr

13、iption .5 4 Purity criteria7 5 Test methods9 6 Labelling - Transportation - Storage12 Annex A (informative) General information on iron (III) sulfate liquid .14 Annex B (normative) Analytical methods .17 Annex C (informative) Reduction of Fe (III) on a silver column33 Annex D (informative) Determina

14、tion of cadmium, chromium, nickel and lead (inductively coupled plasma optical emission spectrometry (ICP/OES)34 Annex E (normative) General rules relating to safety36 Bibliography 37 SANS 50890:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the S

15、ABS .EN 890:2004 (E) 3 Foreword This document (EN 890:2004) 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 of a national standard, either by publication of an identical text or by endorse

16、ment, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. This document supersedes EN 890:1998. Significant technical difference between this edition and EN 890:1998 are as follows: a) replacement of the reference to EU Directive 80/778 of 15 J

17、uly 1980 with the latest Directive in force (see1) ; b) expansion of annex A by addition of A.2 “Quality of commercial product“ ; c) deletion of annex F. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eur

18、opean 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, Spain, Sweden, Switzerland and United Kingdom. SANS 50890:2

19、008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (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

20、 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 regulations concerning the use and/or the characteristics of t

21、his product remain in force. NOTE Conformity with this standard 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 National Authorities. SANS 50890:2008Th

22、is s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 5 1 Scope This document is applicable to iron (III) sulfate liquid of various iron and/or acid contents (see 3.2) used for treatment of water intended for human consumption. It des

23、cribes the characteristics of iron (III) sulfate liquid and specifies the requirements and the corresponding analytical methods for iron (III) sulfate liquid ( analytical methods are given in Annex B) and gives information on its use in water treatment. It also determines the rules relating to safe

24、handling and use of iron (III) sulfate liquid (see annex E) . 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

25、(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 industrial use Safety in sampling. ISO 5790:1979, Inorganic chemical products for industrial use General method for determi

26、nation of chloride content Mercurimetric method. ISO 6206, Chemical products for industrial use Sampling Vocabulary. 3 Description 3.1 Identification 3.1.1 Chemical name Iron (III) sulfate, liquid . 3.1.2 Synonym or common names Ferric sulfate liquor, red iron liquor. 3.1.3 Relative molecular mass 3

27、99,87. 3.1.4 Empirical formula Fe2(SO4)3. 3.1.5 Chemical formula Fe2(SO4)3. SANS 50890:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 6 3.1.6 CAS Registry Number1)10028-22-5. 3.1.7 EINECS reference2)233-072-9. 3.2 Commerc

28、ial forms Different classes of solution exist varying in iron content and acidity as classified in Table 1. Table 1 Different classes Classes Fe (III) Fe2(SO4)3Free H2SO4Density at 15 C Mass fraction in % Mass fraction c in %Mass fraction in % g/ml Class A 11,20 to 11,80 40,00 to 42,14 1,00 1,49 to

29、1,53 Class B 11,20 to 11,80 36,10 to 39,24 0a1,45 to 1,47 Class C 8,40 to 8,80 30,00 to 31,43 10,00 to 11, 00 1,46 to 1,48 Class D 12,50 to 12,80 44,60 to 45,70 1,00 1,57 to 1,60 Class E 12,50 to 12,80 40,70 to 42,80 0a1,52 to 1,56 Class F 13,50 to 14,00 44,78 to 47,55 0b1,58 to 1,63 aDeficiency of

30、SO42-, expressed as H2SO4, is a mass fraction of 3 % to 4 % of the product. bDeficiency of SO42-, expressed as H2SO4, is a mass fraction of 2,5 % to 3,5 % of the product. cFe2(SO4)3by direct stoicheiometry with subtraction of calculated SO42-deficiency where appropriate on classes B, E and F. 3.3 Ph

31、ysical properties 3.3.1 Appearance The iron (III) sulfate liquid is a red/brown solution. 3.3.2 Density See Table 1. 3.3.3 Solubility (in water) The iron (III) sulfate liquid is dilutable down to about a mass fraction of 1 % of Fe2(SO4)3. Below this concentration, hydrolysis and formation of hydroxi

32、de will occur. 3.3.4 Vapour pressure Not known. 1) Chemical Abstract Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. SANS 50890:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 7 3

33、.3.5 Boiling point at 100 kPa3)Higher than 100 C. 3.3.6 Freezing point Lower than 15 C. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) The viscosity of the commonly used solution varies in the range of 5 mPa.s to 130 mPa.s at 10 C. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical

34、 pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties The solutions of iron (III) sulfate are acidic. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for iron (III) sulfate liquid used for the treatment of water intended for

35、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 Users of this product should

36、 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 this product standard. L

37、imits 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 the production process or raw materials lead to significant quantities of impurities, by-products or additives being p

38、resent, this shall be notified to the user. 4.2 Composition of commercial product The product shall contain not less than a mass fraction of 30 % of Fe2(SO4)3and shall be within 3 % of the manufacturers declared values. 3) 100 kPa = 1 bar. SANS 50890:2008This s tandard may only be used and printed b

39、y approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 8 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 2. The concentration limits refer to Fe (III). Table 2 Impurities Impurity Limit Mass fraction of Fe (III) content in %

40、Grade 1 Grade 2 Grade 3 Manganese max. 0,5 1 2 Iron (II)amax. 2,5 2,5 2,5 Insoluble mattersbmax. 0,3 0,3 0,3 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 remaininto the water at lower pH values.bAn excess of

41、 insoluble matters indicates the presence of foreign matter. Iron is a component of the product will usually be removed in the treatment process.4.4 Chemical parameters The product shall conform to the requirements specified in Table 3. The concentration limits are specified in milligrams per kilogr

42、am of Fe (III). Table 3 Chemical parameters Limit in mg/kg of Fe (III) Parameter Type 1 Type 2 Type 3 Arsenic (As) max. 1 20 50 Cadmium (Cd) max. 1 25 50 Chromium (Cr) max. 100 350 500 Mercury (Hg) max. 0,1 5 10 Nickel (Ni) max. 300 350 500 Lead (Pb) max. 10 100 400 Antimony (Sb) max. 10 20 60 Selen

43、ium (Se) max. 1 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 iron (III) sulfate on trace metal content in drinking water see A.2. SANS 50890:2008This s tand

44、ard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 890:2004 (E) 9 5 Test methods 5.1 Sampling 5.1.1 General Observe the general recommendations in ISO 3165 and take into account ISO 6206. Prepare the laboratory sample required by the relevant procedure

45、described in 5.1.2 and 5.1.3. 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 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

46、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 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 ar

47、e 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 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

48、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 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

49、 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 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, withdraw it from the container and allow any liquid adhering at the outside of the tube to drain off. When us