Conceptual Evaluation of Sequential Extraction and Photocatalytic Deposition Process for Recovery of Lead from Soil
Source: Journal of Advanced Oxidation Technologies, Volume 4, Number 2, July 1999 , pp. 125-137(13)
Publisher: Science and Technology Network Inc.
Abstract:An evaluation of a new process for lead-containing soils detoxification is presented. The process combines the techniques of extraction by chelation for removal of lead from soil, and of photocatalysis for the lead-chelatant destruction and simultaneous lead deposition on the inexpensive photocatalyst TiO2. A literature review on artificially lead contaminated soils indicates that variables influencing the chelation process effectiveness are soil type, chelating agent, ratio of chelating agent/initial lead concentration, chelation pH and ionic strength. The variables influencing the subsequent metal photodeposition process are the pH, the initial lead-chelatant concentration and the dose of UV illumination. A simple economical analysis using some examples from the literature shows that this process could be feasible in certain conditions, and that it could be applicable to removal of other heavy metals contained in soils, such as mercury or uranium.
Document Type: Research Article
Affiliations: 1: Departamento de Ingeniería Química, Universidad de Barcelona, C/Martí i Franquès 1, 6, 08028-Barcelona, Spain 2: Department of Chemical Engineering, North Carolina State University, 113 Riddick Hall, 27695-7905 Raleigh, NC, USA
Publication date: July 1999
- The Journal of Advanced Oxidation Technologies (JAOTs) provides an international forum that accepts papers describing basic research and practical applications of these technologies. The Journal publishes articles in the form of critical reviews and research papers focused on the science and engineering of advanced oxidation technologies for water, air and soil treatment.
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