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This study investigated the fate of nano-CeO 2 during municipal wastewater treatment using a laboratory-scale activated sludge (A/S) system fed with primarily-treated municipal wastewater and nano-CeO 2 (55.0mg Ce/L). Nano-CeO 2 was highly removed during A/S treatment (96.6% total Ce). Extensive removal of CeO 2 <200nm was also attained and the concentration escaping...
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