1、BRITISH STANDARD BS EN 14664:2004 Chemicals used for treatment of water intended for human consumption Iron(III) sulfate, solid The European Standard EN 14664:2004 has the status of a British Standard ICS 71.100.80 BS EN 14664:2004 This British Standard was published under the authority of the Stand
2、ards Policy and Strategy Committee on 24 November 2004 BSI 24 November 2004 ISBN 0 580 44867 3 National foreword This British Standard is the official English language version of EN 14664:2004. The UK participation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinkin
3、g 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 British Standards which implement international or European publications referred to in this document may be found in the BSI Ca
4、talogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
5、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 responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mon
6、itor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 39 and a back cover. The BSI copyright notice displayed in this document indicates when the document was la
7、st issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14664 November2004 ICS 71.100.80 Englishversion Chemicalsusedfortreatmentofwaterintendedforhuman consumptionIron(III)sulfate,solid Produitschimiquesutilisspourletraitmentdeleau desti
8、nelaconsommationhumaineSulfatedefer(III) solide ProduktezurAufbereitungvonWasserfrdenmeschlichen GebrauchEisen(III)sulfat,fest ThisEuropeanStandardwasapprovedbyCENon30September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Stand
9、ardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytr
10、a nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,
11、Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyf
12、ormandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14664:2004:EEN 14664:2004 (E) 2 Contents Page Foreword3 1 Scope5 2 Normative references5 3 Description.5 4 Purity criteria7 5 Test methods8 6 Labelling - Transportation - Storage10 Annex A (informative) General information on iron (II
13、I) sulfate solid 13 Annex B (normative) General rules relating to safety.18 Annex C (normative) Analytical methods.19 Annex D (informative) Reduction of Fe (III) on a silver column35 Annex E (informative) Determination of cadmium, chromium, nickel and lead (inductively coupled plasma optical emissio
14、n spectrometry (ICP/OES)37 Bibliography 39 EN 14664:2004 (E) 3 Foreword This document (EN 14664:2004) 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 publ
15、ication 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this E
16、uropean 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. EN 14664:2
17、004 (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 restriction in any of the Member States of the
18、 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 document does not confer or imply acceptance or approval of the
19、 product in any or 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. EN 14664:2004 (E) 5 1 Scope This standard is applicable to iron (III) sulfate solid used for treatment of water intended for human cons
20、umption. It describes the characteristics of iron (III) sulfate solid and specifies the requirements and the corresponding analytical methods for iron (III) sulfate solid (analytical methods are given in Annex C) and gives information on its use in water treatment. It also determines the rules relat
21、ing to safe handling and use of iron (III) sulfate solid (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
22、 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 industrial use Safety in sampling ISO 5790:1979, Inorganic chemical products for industrial use General method for
23、 the determination of chloride content - Mercurimetric method ISO 6206, Chemical products for industrial 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.
24、1 Identification 3.1.1 Chemical name Iron (III) sulfate solid. 3.1.2 Synonym or common names Ferric sulfate solid. 3.1.3 Relative molecular mass 561,9. 3.1.4 Empirical formula Fe 2 (SO 4 ) 3 . x H 2 O where x is approximately 5,5. 3.1.5 Chemical formula Fe 2 (SO 4 ) 3 .x H 2 O where x is approximate
25、ly 5,5. EN 14664:2004 (E) 6 3.1.6 CAS Registry Number 1)10028-22-5. 3.1.7 EINECS reference 2)233-072-9. 3.2 Commercial form The iron (IlI) sulfate solid is available as free flowing granules or powder, with a particle size range from 0,1 mm to 10 mm and 0,055 mm to 0,060 mm respectively and the angl
26、e of repose is approximately 37. 3.3 Physical properties 3.3.1 Appearance The iron (III) sulfate solid consists of greyish or yellowish granules. 3.3.2 Density The bulk density is approximately equal to 1 300 kg/m 3for granules and 1 000 kg/m 3for powders at 20 C. 3.3.3 Solubility (in water) Iron (I
27、II) sulfate solid dissolves rapidly in water. The solubility is approximately 550 g/l, corresponding to approximately mass fraction 11 % of Fe at 20 C. At concentrations lower than mass fraction of 0,3 % Fe, hydrolysis and formation of iron (III) hydroxide will occur. 3.3.4 Vapour pressure Not known
28、. 3.3.5 Boiling point at 100 kPa 3)Not applicable. 3.3.6 Melting point Iron (IIl) sulfate solid decomposes when heated. 3.3.7 Specific heat Not known. 3.3.8 Viscosity (dynamic) Not applicable. 1) Chemical Abstract Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substan
29、ces. 3) 100 kPa = 1 bar. EN 14664:2004 (E) 7 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness The granule strength is higher than 50 N. 3.4 Chemical properties Iron (III) sulfate solid is slightly hygroscopic at relative humidity higher tha
30、n 50 %. Iron (III) sulfate solutions are acidic. 4 Purity criteria 4.1 General This document specifies the minimum purity requirements for iron (III) sulfate solid used for the treatment of water intended for human consumption. Limits are given for impurities commonly present in the product. Dependi
31、ng 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 appropriate purity for
32、 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. Limits have been given for impurities and chemical parameters where these are likely to be p
33、resent 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 produ
34、ct shall contain not less than mass fraction of 64 % of Fe 2 (SO 4 ) 3or not less than a mass fraction of 18 % of Fe and shall be within 3 % of the manufacturers declared values. 4.3 Impurities and main by-products The product shall conform to the requirements specified in Table 1. The concentration
35、 limits refer to Fe (III). EN 14664:2004 (E) 8 Table 1 Impurities Impurity Limit Mass fraction in % of Fe (III) content Grade 1 Grade 2 Grade 3 Manganese max. 0,5 1 2 Iron(II) amax. 3,5 3,5 3,5 H 2 SO 4 free max. 8 8 8 Insoluble matters bmax. 10 10 10 aFe (II) has a lower coagulant efficiency compar
36、ed 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 of foreign matter. Iron is a component of the product will usually be removed in the treatment process. 4.4 Chemi
37、cal parameters The product shall conform to the requirements specified in Table 2. The concentration limits are specified in milligrams per kilogram of Fe (III). Table 2 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
38、Chromium (Cr) max. 100 350 500 Mercury (Hg) max. 2,5 5 10 Nickel (Ni) max. 300 350 500 Lead (Pb) max. 2,5 100 400 Antimony (Sb) max. 10 20 60 Selenium (Se) max. 5 20 60 NOTE Cyanide (CN - ) is usually not relevant because of the acidity of the product. Pesticides and polycyclic aromatic hydrocarbons
39、 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. 5 Test methods 5.1 Sampling Observe the general recommendations in ISO 3165 and take into account ISO 6206. Prepare
40、 the laboratory sample required by the relevant procedure described in ISO 8213. EN 14664:2004 (E) 9 5.2 Analyses 5.2.1 Main product Iron (III) sulfate is determined as Fe (III) contents in the test sample. Fe (III) content is determined as the difference between total iron content and Fe (II) conte
41、nt (see C.1). 5.2.2 Impurities 5.2.2.1 Manganese The manganese content shall be determined by flame atomic absorption spectrometry (FAAS) (see C.2). 5.2.2.2 Iron (II) ( Fe (II) The Fe (II) content is expressed as C (II)(see C.1.2.5.3). 5.2.2.3 Insoluble matter The mass fraction in % of the insoluble
42、 matter shall be determined in accordance with the method described in C.3. 5.2.2.4 Free acid The free acid shall be determined in accordance with the method described in C.4. 5.2.3 Chemical parameters 5.2.3.1 Preparation of sample solution 5.2.3.1.1 General Oxidation and wet digestion is used to br
43、ing the samples into a stable solution. 5.2.3.1.2 Principle Oxidation with hydrogen peroxide (H 2 O 2 )followed by digestion with hydrochloric acid (HCl). 5.2.3.1.3 Reagents 5.2.3.1.3.1 All reagents shall be of a recognized analytical grade and the water used shall conform to the grade 3 specified i
44、n EN ISO 3696. 5.2.3.1.3.2 Hydrochloric acid (HCl), solution, mass fraction 30 %. 5.2.3.1.3.3 Hydrogen peroxide (H 2 O 2 ),solution, mass fraction 30 %. 5.2.3.1.4 Apparatus 5.2.3.1.4.1 Ordinary laboratory apparatus and glassware together with the following 5.2.3.1.4.2 Analytical balance. 5.2.3.1.4.3
45、 Graduated cylinder, 50 ml. 5.2.3.1.4.4 Round flask with reflux condenser. EN 14664:2004 (E) 10 5.2.3.1.4.5 Hot plate. 5.2.3.1.4.6 Volumetric flask, 200 ml. 5.2.3.1.5 Procedure Dissolve with 20 ml of water 20,0 g of the iron salt. Filter and wash the filter cake with hot water. Add to the mixed filt
46、rate and wash water 5 ml hydrogen peroxide solution (5.2.3.1.3.3) to iron (III)-samples. After adding 50 ml hydrochloric acid (5.2.3.1.3.2) boil the solution for 15 min by using a reflux condenser (5.2.3.1.4.4). Cool down the solution, transfer to a 200 ml volumetric flask (5.2.3.1.4.6) and fill up
47、to the mark with water. This is the sample solution. 5.2.3.2 Arsenic The arsenic content shall be determined by hydride generation atomic absorption spectrometry (see C.5). 5.2.3.3 Cadmium The cadmium content shall be determined by graphite furnace atomic absorption spectrometry (see C.7). 5.2.3.4 C
48、hromium The chromium content shall be determined by graphite furnace atomic absorption spectrometry (see C.7). 5.2.3.5 Mercury The mercury content shall be determined by cold vapour atomic absorption spectrometry (see C.6). 5.2.3.6 Nickel The nickel content shall be determined by graphite furnace atomic absorption spectrometry (see C.7). 5.2.3.7 Lead The lead content shall be determined by graphite furnace atomic absorption spectrometry (see C.7). 5.2.3.8 Antimony The antimony content shall be determined by hydride generation atomic absorption spectro
