Cheng Yang

Henan University of Science and Technology

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Feiyu Kang

Tsinghua University

Peichao Zou

University of California, Irvine

Yang Wang

Tsinghua University

Hui Wu

State Key Laboratory of New Ceramics and Fine Processing

Ziyin Lin

Huizhou University

Ching‐Ping Wong

Georgia Institute of Technology

Baohua Li

Tsinghua University

Kai Huang

Beijing University of Posts and Telecommunications

Xuanyu Wang

Tianjin University of Technology

Chunyi Zhi

City University of Hong Kong

Cooperative Institutions

Tsinghua University

111

Chinese Academy of Sciences

Tsinghua–Berkeley Shenzhen Institute

University Town of Shenzhen

State Key Laboratory of New Ceramics and Fine Processing

City University of Hong Kong

University of Chinese Academy of Sciences

Xi'an Jiaotong University

Beihang University

Zhejiang University

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Ozone/graphene oxide catalytic oxidation: a novel method to degrade emerging organic contaminant N, N-diethyl-m-toluamide (DEET)

Scientific Reports (2016)

Jianan Liu Zhuo Chen Qian-Yuan Wu Ang Li Hong‐Ying Hu

Abstract N, N -diethyl- m -toluamide (DEET) is one of the important emerging contaminants that are being increasingly detected in reclaimed water as well as in drinking water sources. However, DEET is refractory to conventional biological treatment and pure ozone which is absent of hydroxyl radical. Current researches on the efficient removal of DEET are still quite limited. This study utilizes a novel method, namely ozone/graphene oxide (O 3 /GO), to investigate the effects on DEET removal in aqueous systems, especially in reclaimed water. The results indicate that the DEET degradation rate was significantly accelerated through the combined effect of GO and ozonation which can yield abundant hydroxyl radical, compared to pure ozone condition. According to hydroxyl radical scavenging experiments, hydroxyl radical was found to play a dominant role in synergistic removal of DEET. These findings can offer sound suggestions for future research on the removal of emerging organic contaminants. The information could also be beneficial to reclaimed water safety and sustainable management.

DEET

Hydroxyl radical

Degradation

10.1038/srep31405

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Citations (41)

Hydrodynamic tearing of bacteria on nanotips for sustainable water disinfection

Nature Communications (2023)

Lu Peng Haojie Zhu Haobin Wang Zhenbin Guo Qian-Yuan Wu

Water disinfection is conventionally achieved by oxidation or irradiation, which is often associated with a high carbon footprint and the formation of toxic byproducts. Here, we describe a nano-structured material that is highly effective at killing bacteria in water through a hydrodynamic mechanism. The material consists of carbon-coated, sharp Cu(OH)2 nanowires grown on a copper foam substrate. We show that mild water flow (e.g. driven from a storage tank) can efficiently tear up bacteria through a high dispersion force between the nanotip surface and the cell envelope. Bacterial cell rupture is due to tearing of the cell envelope rather than collisions. This mechanism produces rapid inactivation of bacteria in water, and achieved complete disinfection in a 30-day field test. Our approach exploits fluidic energy and does not require additional energy supply, thus offering an efficient and low-cost system that could potentially be incorporated in water treatment processes in wastewater facilities and rural communities.

Tearing

Fluidics

Cell envelope

10.1038/s41467-023-41490-5

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Citations (32)

Ultrafast Cu2+ recovery from waste water by jet electrodeposition

Separation and Purification Technology (2019)

Dongdong Ning Cheng Yang Hui Wu

10.1016/j.seppur.2019.03.059

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Citations (34)