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Heap leaching of Cu contaminated soil with [S,S]-EDDS in a closed process loop [An article from: Journal of Hazardous Materials]
Book Details
Author(s)N. Finzgar, A. Zumer, D. Lestan
PublisherElsevier
ISBN / ASINB000RR8XNW
ISBN-13978B000RR8XN8
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Heap leaching of Cu contaminated soil (412+/-11mgkg^-^1) with 5mmolkg^-^1 ethylenediamine disuccinate [S,S]-EDDS as a chelator was tested in a laboratory-scale soil column study. The washing solution was recycled in a closed process loop after microbial (using a microbially active permeable bed, composed of substrate and absorbent) and oxidative chemical (using combined ozonation and UV irradiation) degradation of metal-[S,S]-EDDS complexes and retention of released Cu on a commercial absorbent Slovakite. Heap leaching using the permeable bed removed 25.5+/-3.6% of initial total Cu from the soil. Ozone/UV treatment of the [S,S]-EDDS washing solution removed much more, 47.5+/-7.4%, of Cu. Both methods yielded a clear and colorless final (waste) washing solution, with 7.0+/-10.0 and 2.6+/-0.7mgL^-^1 Cu (permeable bed and ozone/UV method, respectively). The results of our study indicate that chemical treatment of chelator washing solution with ozone/UV in a closed process loop could lead to the development of a new, efficient and environmentally safe remediation method with controllable Cu emissions.
Description:
Heap leaching of Cu contaminated soil (412+/-11mgkg^-^1) with 5mmolkg^-^1 ethylenediamine disuccinate [S,S]-EDDS as a chelator was tested in a laboratory-scale soil column study. The washing solution was recycled in a closed process loop after microbial (using a microbially active permeable bed, composed of substrate and absorbent) and oxidative chemical (using combined ozonation and UV irradiation) degradation of metal-[S,S]-EDDS complexes and retention of released Cu on a commercial absorbent Slovakite. Heap leaching using the permeable bed removed 25.5+/-3.6% of initial total Cu from the soil. Ozone/UV treatment of the [S,S]-EDDS washing solution removed much more, 47.5+/-7.4%, of Cu. Both methods yielded a clear and colorless final (waste) washing solution, with 7.0+/-10.0 and 2.6+/-0.7mgL^-^1 Cu (permeable bed and ozone/UV method, respectively). The results of our study indicate that chemical treatment of chelator washing solution with ozone/UV in a closed process loop could lead to the development of a new, efficient and environmentally safe remediation method with controllable Cu emissions.
