کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
585774 1453187 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heap leaching of Cu contaminated soil with [S,S]-EDDS in a closed process loop
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Heap leaching of Cu contaminated soil with [S,S]-EDDS in a closed process loop
چکیده انگلیسی

Heap leaching of Cu contaminated soil (412 ± 11 mg kg−1) with 5 mmol kg−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 ± 0.7 mg L−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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 135, Issues 1–3, 31 July 2006, Pages 418–422
نویسندگان
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