Leaching potential of nano-scale titanium dioxide in fresh municipal solid waste

With the rapid development in nanotechnology in recent years, the number of commercially available products containing engineered nanomaterials (ENMs) has increased significantly. It is expected that large fractions of these ENMs will end up in landfills for final disposal. Despite the wide use of E...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2016-02, Vol.144, p.1567-1572
Main Authors: Dulger, M., Sakallioglu, T., Temizel, I., Demirel, B., Copty, N.K., Onay, T.T., Uyguner-Demirel, C.S., Karanfil, T.
Format: Article
Language:English
Subjects:
Cities
Hydrogen-Ion Concentration
Landfill
Landfills
Leachate
Leachates
Leaching
Municipal solid waste
Nano-TiO2
Nanomaterial
Nanostructure
Nanostructures - analysis
Osmolar Concentration
Solid Waste - analysis
Solid wastes
Textiles
Titanium - analysis
Titanium - chemistry
Titanium dioxide
Waste Disposal Facilities
Wastes
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Summary:With the rapid development in nanotechnology in recent years, the number of commercially available products containing engineered nanomaterials (ENMs) has increased significantly. It is expected that large fractions of these ENMs will end up in landfills for final disposal. Despite the wide use of ENMs, little data is available on their fate within landfills. This study examined the leaching behavior of nanoscale titanium dioxide (nano-TiO2), one of the mostly used ENMs, in fresh municipal solid wastes (MSWs). Batch reactors containing municipal waste samples were spiked with a range of nano-TiO2 concentrations at different pH and ionic strength conditions. The Ti concentrations in leachate decreased rapidly and reached steady state after about 12–24 h. Results suggest that, for the environmental conditions considered, approximately 3–19% of the added nano-TiO2remained in leachate. Batch tests conducted with individual synthetically-prepared solid waste components also showed low leaching potential (5.2% for organic waste, 3.3% for glass, 1.7% for both textile and paper and 0.6% for metal), indicating that all components of MSW contributed to the retention of the nano-TiO2 mass within the solid matrix. •Leaching potential of nano-TiO2 in real fresh MSW was investigated.•Batch tests were conducted at different pH, ionic strength and Ti concentrations.•For all experimental conditions, most of the added Ti was retained in the waste.•All MSW components contributed to the retention of the nano-TiO2.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2015.10.037