BS EN 14997:2015
$198.66
Characterization of waste. Leaching behaviour test. Influence of pH on leaching with continuous pH control
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 56 |
This European Standard specifies a method for the determination of the influence of pH on the leachability of inorganic constituents from a waste material. Approaching equilibrium as defined in this European Standard is established by continuous adjustment of the pH by addition of acid or base to reach desired pH values. This test method produces eluates, which are subsequently characterized physically and chemically.
This European Standard is a parameter specific test as specified in EN 12920 . The application of this test method alone is not sufficient for the determination of the detailed leaching behaviour of a waste under specified conditions.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Symbols and abbreviations |
| 11 | 5 Principle 6 Reagents |
| 12 | 7 Equipment 7.1 General 7.2 Laboratory equipment |
| 13 | 8 Sample preparation 8.1 Laboratory sample 8.2 Preparation of the test sample 8.3 Determination of dry residue |
| 14 | 8.4 Preparation of the test portion 9 Procedure 9.1 Contact time 9.2 pH range 9.3 Leaching test 9.3.1 General |
| 15 | 9.3.2 Preparation of leachant |
| 17 | 9.3.3 Leaching procedure |
| 18 | 9.4 Natural pH 10 Eluate treatment, storage and analysis 11 Blank test |
| 19 | 12 Performance characteristics Table 1 — Typical values and observed ranges of the repeatability and reproducibility limits 13 Test report |
| 21 | Annex A (informative) Example of a data sheet Table A.1 — An example of a data sheet for the recording of test results |
| 22 | Annex B (informative) Operation and uses of the test — Influence of pH on the leaching behaviour B.1 Clarification of the two modes of operation of the test: influence of pH on the leaching behaviour |
| 23 | Figure B.1 — Typical pH variations during the two modes of the tests for determining the influence of pH on the leaching behaviour of an alkaline material at a final pH around 5 |
| 24 | B.2 Expression of results B.3 Scope and limits of the application field of the test B.3.1 Remarks on the use of pH dependence test results to assess the effects of ageing |
| 25 | B.3.2 Examples of test result use and considerations on scope |
| 26 | B.4 Example: Identification of the sensitivity of leaching to pH over the environmentally relevant pH range Figure B.2 — Illustration of the influence of pH on the leaching behaviour of a heavily sewage sludge amended soil as obtained in a pH range 2 – 12 (test performed with initial acid/base addition) its use in relation to different scenarios for the sam… |
| 27 | Annex C (informative) Preliminary determination of the acid/base consumption C.1 General C.2 Titration procedure to estimate the ANC and the BNC C.2.1 Reagents and laboratory devices C.2.2 Test portion C.2.3 Procedure C.2.3.1 Preparation |
| 28 | C.2.3.2 Natural pH C.2.3.3 Acid titration C.2.3.4 Base addition C.2.4 Expression of results |
| 29 | C.3 Arbitrary division of the maximum acid/base consumption for the extreme pH values C.3.1 General C.3.2 Reagents and laboratory devices C.3.3 Test portion C.3.4 Procedure C.3.4.1 Preparation |
| 30 | C.3.4.2 Natural pH C.3.4.3 Acid titration C.3.4.4 Base addition C.3.5 Expression of results |
| 31 | Annex D (informative) Examples of acid and base neutralization capacities for waste, soil, sediment and construction materials D.1 Examples of acid and base neutralization capacities |
| 32 | Figure D.1 — Acid/base neutralization curves for a wide range of materials |
| 33 | D.2 Use of acid and base neutralization capacity data |
| 34 | Annex E (informative) Repeatability and reproducibility data E.1 Materials used in the interlaboratory comparison study Table E.1 — Material types tested and substances analysed in the interlaboratory comparison of the pH dependent leaching behaviour of substances from waste and stabilized waste E.2 Interlaboratory comparison results |
| 35 | Table E.2 — Results of the interlaboratory comparison studies of the pH dependent leaching behaviour of substances from waste and stabilized waste (Part 1) |
| 41 | Table E.3 — Results of the interlaboratory comparison studies of the pH dependent leaching behaviour of substances from waste and stabilized waste (Part 2) |
| 52 | Bibliography |
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BS EN 14997:2015 – TC:2020 Edition
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