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Yaochun Yu
University of Illinois at Urbana–Champaign
Inorganic chemistryComammoxAmmonia monooxygenaseBiotransformationEnvironmental science
6Publications
3H-index
14Citations
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Publications 8
Newest
#1Michael J. Bentel (UCR: University of California, Riverside)H-Index: 1
#2Yaochun Yu (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
Last. Jinyong Liu (UCR: University of California, Riverside)H-Index: 9
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This study explores structure–reactivity relationships for the degradation of emerging perfluoroalkyl ether carboxylic acid (PFECA) pollutants with ultraviolet-generated hydrated electrons (eaq–). The rate and extent of PFECA degradation depend on both the branching extent and the chain length of oxygen-segregated fluoroalkyl moieties. Kinetic measurements, theoretical calculations, and transformation product analyses provide a comprehensive understanding of the PFECA degradation mechanisms and ...
Source
#1Ping Han (University of Vienna)H-Index: 12
#2Yaochun Yu (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
Last. Yujie Men (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
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The recently discovered complete ammonia-oxidizing (comammox) bacteria occur in various environments, including wastewater treatment plants. To better understand their role in micropollutant biotransformation in comparison with ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), we investigated the biotransformation capability of Nitrospira inopinata (the only comammox isolate) for 17 micropollutants. Asulam, fenhexamid, mianserin, and ranitidine were biotransformed by N. inopi...
1 CitationsSource
#1Li-Jun Zhou (CAS: Chinese Academy of Sciences)
#2Ping Han (ECNU: East China Normal University)H-Index: 12
Last. Qinglong L. Wu (CAS: Chinese Academy of Sciences)H-Index: 30
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Abstract The abilities of three phylogenetically distant ammonia oxidizers, Nitrososphaera gargensis, an ammonia-oxidizing archaeon (AOA); Nitrosomomas nitrosa Nm90, an ammonia-oxidizing bacterium (AOB); and Nitrospira inopinata, the only complete ammonia oxidizer (comammox) available as a pure culture, to biotransform seven sulfonamides (SAs) were investigated. The removals and protein-normalized biotransformation rate constants indicated that the AOA strain N. gargensis exhibited the highest S...
Source
#1Jinyong LiuH-Index: 9
#2Yujie MenH-Index: 12
Last. Bryan M. WongH-Index: 30
view all 6 authors...
#1Michael J. Bentel (UCR: University of California, Riverside)H-Index: 1
#2Yaochun Yu (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
Last. Jinyong Liu (UCR: University of California, Riverside)H-Index: 9
view all 7 authors...
This study investigates critical structure–reactivity relationships within 34 representative per- and polyfluoroalkyl substances (PFASs) undergoing defluorination with UV-generated hydrated electrons. While CnF2n+1–COO– with variable fluoroalkyl chain lengths (n = 2 to 10) exhibited a similar rate and extent of parent compound decay and defluorination, the reactions of telomeric CnF2n+1–CH2CH2–COO– and CnF2n+1–SO3– showed an apparent dependence on the length of the fluoroalkyl chain. Cross compa...
3 CitationsSource
#2Michael J. BentelH-Index: 1
Last. Lihua XuH-Index: 3
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#1Yaochun Yu (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
#2Ping Han (University of Vienna)H-Index: 12
Last. Yujie Men (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
view all 6 authors...
Biotransformation of various micropollutants (MPs) has been found to be positively correlated with nitrification in activated sludge communities. To further elucidate the roles played by ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB), we investigated the biotransformation capabilities of an NOB pure culture (Nitrobacter sp.) and an AOB (Nitrosomonas europaea)/NOB (Nitrobacter sp.) coculture for 15 MPs, whose biotransformation was reported previously to be associated with n...
6 CitationsSource
#1Yue Xing (UIUC: University of Illinois at Urbana–Champaign)H-Index: 1
#2Yaochun Yu (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3
Last. Yujie Men (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
view all 3 authors...
The goal of this study is to investigate the occurrence and removal of emerging organic contaminants (EOCs) during wastewater treatment processes and understand the role of enhanced nitrification treatment in removing EOCs. The influent and effluent of each treatment step at two local wastewater treatment plants (WWTPs) were analyzed by high-performance liquid chromatography coupled with high-resolution mass spectrometry. A suspect screening method was applied with a comprehensive self-compiled ...
5 CitationsSource
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