Interaction of carbonaceous nanomaterials with wastewater biomass

作     者：Yu YANG Zhicheng YU Takayuki NOSAKA Kyle DOUDRICK Kiril HRISTOVSKI Pierre HERCKES Paul WESTERHOFF 

作者机构：School of Sustainable Engineering and the Built Environment Arizona State University Tempe AZ 85287 USA School for Engineering of Matter Transport and Energy Arizona State University Tempe AZ 85287 USA Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA The Polytechnic School Arizona State University Mesa AZ 85212 USA Department of Chemistry and Biochemistry Arizona State University Tempe AZ 85287 USA 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2015年第9卷第5期

页      面：823-831页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081703[工学-生物化工] 08[工学] 0817[工学-化学工程与技术] 0836[工学-生物工程] 082203[工学-发酵工程] 0822[工学-轻工技术与工程] 

基　　金：funded by the US National Science Foundation (CBET) US Environmental Protection Agency 

主　　题：multi-walled carbon nanotubes graphene oxide graphene removal wastewater biomass 

摘      要：Increasing production and use of carbonaceous nanomaterials （NMs） will increase their release to the sewer system and to municipal wastewater treatment plants. There is little quantitative knowledge on the removal of multi-walled carbon nanotubes （MWCNTs）, graphene oxide （GO）, or few-layer graphene （FLG） from wastewater into the wastewater biomass. As such, we investigated the quantification of GO and MWCNTs by UV-Vis spectrophotometry, and FLG using programmable thermal analysis （PTA）, respectively. We further explored the removal of pristine and oxidized MWCNTs （O- MWCNTs）, GO, and FLG in a biomass suspension. At least 96% of pristine and O-MWCNTs were removed from the water phase through aggregation and 30-min settling in presence or absence of biomass with an initial MWCNT concentration of 25mg.L-1. Only 65% of GO was removed with biomass concentration at or above 1,000 mg. L-1 as total suspended solids （TSS） with the initial GO concentration of 25 mg. L-1. As UV-Vis spectrophotometry does not work well on quantification of FLG, we studied the removal of FLG at a lower biomass concentration （50mg TSS-L-1） using PTA, which showed a 16% removal of FLG with an initial concentration of 1 mg ·L-1. The removal data for GO and FLG were fitted using the Freundlich equation （R2 = 0.55, 0.94, respectively）. The data presented in this study for carbonaceous NM removal from wastewater provides quantitative informa- tion for environmental exposure modeling and life cycle assessment.