The Use of Metallurgical Wastes in Reactive Barriers

Title: The Use of Metallurgical Wastes in Reactive Barriers
Author(s): Rodríguez-Pacheco
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 1115 - 1123
Total Pages: 9
Nb references: 12
Language: English

Abstract: The aim of this work is the description of the properties of two metallurgical wastes in
relation to their possible use in reactive barriers. The paper presents the results of the physical
and geochemical characterization of the wastes by means of different type of laboratory tests:
batch tests and miscible displacement experiments. One of the wastes comes from the
metallurgical processes of Ni-Co recovery in Cuban nickel industries and the other one from
the metallurgical process of Pb-Zn in Cartagena (Spain). Both wastes are mainly constituted
by iron (oxy)hydroxides minerals. Grain size distribution is poorly graded with an average
value of particle diameter about 0.02 mm.The materials present adsorption isotherms of heavy metals that are strongly non-linear,
however, desorption isotherms in both wastes are linear indicating the presence of hysteretic
processes. The sorption capacity in both wastes was more than one order of magnitude bigger
than common values in natural soils, minerals and synthetic materials that are commonly used
in barriers. On the basis of this elevated sorption capacity and their hydro mechanical
properties these wastes could be effectively used to immobilize heavy metals in reactive
barriers.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.122