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| 1 | Characterizing the antibiotic resistance genes in a river catchment: Influence of anthropogenic activities显示文摘Previous studies on environmental antibiotics resistance genes(ARGs) have focused on the pollution sources such as wastewater treatment plants, aquaculture and livestock farms,etc. Few of them had addressed this issue in a regional scale such as river catchment. Hence,the occurrence and abundances of 23 ARGs were investigated in surface water samples collected from 38 sites which located from the river source to estuary of the Beijiang River.Among them, 11 ARGs were frequently detected in this region and 5 ARGs(sul I, sul II, tet B,tet C, and tet W) were selected for their distribution pattern analysis. The abundances of the selected ARGs were higher in the upstream(8.70 × 10~6 copies/ng DNA) and downstream areas(3.17 × 10~6 copies/ng DNA) than those in the midstream areas(1.23 × 10~6 copies/ng DNA), which was positively correlated to the population density and number of pollution sources. Pollution sources of ARGs along the Beijiang River not only had a great impact on the abundances and diversity, but also on the distribution of specific ARGs in the water samples. Both sul I and sul II were likely originated from aquaculture farms and animal farms,tet W gene was possibly associated with the mining/metal melting industry and the electric waste disposal and tet C gene was commonly found in the area with multiple pollution sources.However, the abundance of tet B was not particularly related to anthropogenic impacts. These findings highlight the influence of pollution sources and density of population on the distribution and dissemination of ARGs at a regional scale. | Haoyu Jiang Renjun Zhou Ying Yang Baowei Chen Zhineng Cheng Mengdi Zhang Jun Li Gan Zhang Shichun Zou | 2018 | Journal of Environmental Sciences2018，30，7： | 7 |
| 2 | Molecular characterization of transformation and halogenation of natural organic matter during the UV/chlorine AOP using FT-ICR mass spectrometry显示文摘UV/chlorine process,as an emerging advanced oxidation process(AOP),was effective for removing micro-pollutants via various reactive radicals,but it also led to the changes of natural organic matter(NOM)and formation of disinfection byproducts(DBPs).By using negative ion electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry(ESI FT-ICR MS),the transformation of Suwannee River NOM(SRNOM)and the formation of chlorinated DBPs(Cl-DBPs)in the UV/chlorine AOP and subsequent post-chlorination were tracked and compared with dark chlorination.In comparison to dark chlorination,the involvement of Cl O·,Cl·,and HO·in the UV/chlorine AOP promoted the transformation of NOM by removing the compounds owning higher aromaticity(AI mod)value and DBE(double-bond equivalence)/C ratio and causing the decrease in the proportion of aromatic compounds.Meanwhile,more compounds which contained only C,H,O,N atoms(CHON)were observed after the UV/chlorine AOP compared with dark chlorination via photolysis of organic chloramines or radical reactions.A total of 833 compounds contained C,H,O,Cl atoms(CHOCl)were observed after the UV/chlorine AOP,higher than 789 CHOCl compounds in dark chlorination,and one-chlorine-containing components were the dominant species.The different products from chlorine substitution reactions(SR)and addition reactions(AR)suggested that SR often occurred in the precursors owning higher H/C ratio and AR often occurred in the precursors owning higher aromaticity.Post-chlorination further caused the cleavages of NOM structures into small molecular weight compounds,removed CHON compounds and enhanced the formation of Cl-DBPs.The results provide information about NOM transformation and Cl-DBPs formation at molecular levels in the UV/chlorine AOP. | Xiaoxue Ruan Yingying Xiang Chii Shang Shuangshuang Cheng Jingfu Liu Zhineng Hao Xin Yang | 2021 | Journal of Environmental Sciences2021，33，4： | 5 |
| 3 | Polycyclic aromatic hydrocarbons (PAHs) in soils and vegetation near an e-waste recycling site in South China: Concentration, distribution, source, and risk assessment显示文摘 | Yan Wang Zhongjing Tian Haolin Zhu Zhineng Cheng Meiling Kang Chunling Luo Jun Li Gan Zhang | 2012 | Science of the Total Environment2012，，： | 1 |
| 4 | Polychlorinatednaphthalenes ( PCNs) in the surface soils of the PearlRiver Delta, South China Distribution, sources, and air-soil exchange 显示文摘 | Wang Yan Cheng Zhineng Li Jun | 2012 | Environmental Pollution2012，170，： | 1 |
| 5 | Polychlorinated biphenyls (PCBs) in air, soil, and cereal crops along the two tributaries of River Chenab, Pakistan: Concentrations, distribution, and screening level risk assessment显示文摘 | Adeel Mahmood Jabir Hussain Syed Riffat Naseem Malik Qian Zheng Zhineng Cheng Jun Li Gan Zhang | 2014 | Science of the Total Environment2014，，： | 1 |
| 6 | Dynamic modeling and compensation of robot six-axis wrist force/torque sensor 显示文摘 | Xu Kejun Li Cheng Zhu Zhineng | 2007 | IEEE Trans Instrum Meas2007，56，5： | 1 |
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