Characterization of waste. Leaching behaviour test for basic characterization. Dynamic monolithic leaching test with continuous leachant renewal under conditions relevant for specified scenario(s)
废物的特性 基本特性的浸出行为测试 在与特定情景相关的条件下进行连续浸出剂更新的动态整体浸出试验
BS PD CEN/TS 15864:2015 is applicable for determining the leaching behaviour of monolithic wastes
under dynamic conditions. The test is performed under experimental conditions relevant to assess the
leaching behaviour in view of the considered scenario(s). This test is aimed at determining the release
as a function of time of inorganic constituents from a monolithic waste, when it is put into contact with
an aqueous solution (leachant).In general, the composition, the temperature and the continuous renewal rate of the leachant are
chosen such that the leaching behaviour of the waste material can be studied in view of the considered
disposal or recovery scenario. When the release needs to be determined without any reference to a
specific scenario, the leachant is demineralized water, the temperature and the continuous renewal rate
are fixed.This dynamic monolithic leaching test (DMLT) is a parameter specific test as specified in EN 12920 and
is therefore not aimed at simulating real situations. The application of this test method alone is not
sufficient for the determination of the detailed leaching behaviour of a monolithic waste under specified
conditions.In the framework of EN 12920 and in combination with additional chemical information, the test results
are used to identify the leaching mechanisms and their relative importance. The intrinsic properties can
be used to predict the release of constituents at a given time frame, in order to assess the leaching
behaviour of monolithic waste materials, placed in different situations or scenarios (including disposal
and recycling scenarios).The test method applies to regularly shaped test portions of monolithic wastes with minimum
dimensions of 40 mm in all directions that are assumed to maintain their integrity over a time frame
relevant for the considered scenario. The test method applies to test portions for which the geometric
surface area can be determined with the help of simple geometric equations. The test method applies to
low permeable monolithic materials.NOTE 1 If, in order to comply with the requirements of regular shape, the test portion is prepared by cutting or
coring, then new surfaces are exposed which can lead to change(s) in leaching properties. On the other hand if the
test portion is prepared by moulding, the surface will be dependent to the type of mould and the conditions of
storage. If the intention is to evaluate the behaviour of the material core, the specimen needs to be stored without
any contact with air to avoid carbonation.NOTE 2 For monolithic waste materials with a saturated hydraulic conductivity higher than 10-8 m·s-1, water is
likely to percolate through the monolith rather than flow around it. In such cases, relating the release to the
geometric surface can lead to misinterpretation. A percolation test is then more appropriate (e.g. CEN/TS 14405).This procedure may not be applicable to materials reacting with the leachant, leading for example to
excessive gas emission or an excessive heat release.This document has been developed to determine the release of mainly inorganic constituents from
wastes. It does not take into account the particular characteristics of organic constituents nor the
consequences of microbiological processes in organic degradable wastes.Cross References:EN 14346EN 15002EN 16192EN ISO 3696ISO 3696EN ISO 5667-3ISO 5667-3EN 12457-1:2002EN 12920:2006+A1:2008CEN/TS 14405EN 14429EN 14899EN 14997CEN/TS 15862EN 15863CEN/TS 16660AFNOR XP X30-450:2002AFNOR XP X30-467:2002AFNOR XP X30-469:2007ANSI/ANS 16.1:19861999/31/EC2003/33/ECAll current amendments available at time of purchase are included with the purchase of this document.