Application of FeIII-TAML/H2O2 system for treatment of fluoroquinolone antibiotics

Over the recent past, fluoroquinolone antibiotics (FQs) have raised extensive attention due to their potential to induce the formation of resistance genes and “superbugs”, thus various advanced oxidation techniques have been developed to eliminate their release into the environment. In the present study, the prototype tetraamido macrocyclic ligand (Fe^III-TAML)/hydrogen peroxide (H₂O₂) system is employed to degrade FQs (i.e., norfloxacin and ciprofloxacin) over a wide pH range (i.e., pH 6-10), and the reaction rate increases with the increase in pH level. The effect of dosage of Fe^III-TAML and H₂O₂ on the degradation of FQs is evaluated, and the reaction rate is linearly correlated with the added amount of chemicals. Moreover, the impact of natural organic matters (NOM) on the removal of FQs is investigated, and the degradation kinetics show that both NOM type and experimental concentration exhibit negligible influence on the oxidative degradation of selected antibiotics. Based on the results of liquid chromatography-high resolution mass spectrometry and theoretical calculations, the reaction sites and pathways of FQs by Fe^III-TAML/H₂O₂ system are further predicted and elucidated.     

Fabrication of PVA/GO Nanofiber Films by Electrospinning: Application for the Adsorption of Cu2+ and Organic Dyes

Journal of Polymers and the Environment - In recent years, the treatment of water pollution has been a challenging and far-reaching topic. In order to improve the adsorption performance of...     

Reinforcing and Toughening Modification of PPC/PBS Blends Compatibilized with Epoxy Terminated Hyperbranched Polymers

Journal of Polymers and the Environment - Polypropylene carbonate (PPC)/polybutylene succinate (PBS) blends were prepared by melt-blending with terminal epoxy-based hyperbranched polymers (EHBP) as...     

Semi-closed synthesis of nitrogen and oxygen Co-doped mesoporous carbon for selective aqueous oxidation

Heteroatom-doped meso/micro-porous carbon materials are conventionally produced by harsh carbonization under an inert atmosphere involving specific precursors, hard/soft templates, and heteroatom-containing agents. Herein, we report a facile synthesis of N and O co-doped meso/micro-porous carbon (NOMC) by template-free carbonization of a small-molecule precursor in a semi-closed system. The semi-closed carbonizaiton process yields hydrophilic NOMCs with large surface area in a high yield. The porous structure as well as the elemental composition of NOMCs can be modulated by changing the holding time at a particular temperature. NOMCs as metal-free heterogeneous catalysts can selectively oxidize benzyl alcohol and its derivatives into aldehydes/ketones with>85％conversion in aqueous solution, which is much higher than that of the control sample obtained in tube furnace (21％conversion), mainly due to their high N content, high percentage of pyridinic N, and large surface area. The presence of O-containing moieties also helps to improve the hydrophilicity and dispersion ability of catalysts and thus facilitates the mass transfer process during aqueous oxidation. The NOMC catalysts also dispayed excellent activity for a wide range of substrates with a selectivity of>99％.     

CdS and Ag synergistically improved the performance of g-C3N4 on visible-light photocatalytic degradation of pollution

Environmental Science and Pollution Research - CdS-AgO@g-C3N4 nanocomposites were successfully synthesized and characterized by XRD, N2 physical adsorption, XPS, SEM, TEM, EDX, and UV–Vis DRS...     

Effects of ambient air pollution on glycosylated hemoglobin: a systematic review and meta-analysis

Environmental Science and Pollution Research - Air pollution is one of the biggest environmental health problems in the world; accumulative studies have shown that air pollution was closely related...     

建筑施工环境保护调查研究

通过对建筑施工企业管理人员及施工场地周围居民的环境保护态度进行调查研究,结果表明:在污染治理方面,建筑垃圾主要以当场焚烧和运往指定地点填埋为主。施工噪声主要是禁止夜间施工和修建噪声防护墙为主。引起目前建筑施工污染环境的主要原因为环境监察力度不够,环保投入少,管理不科学等三个方面。从健全法律法规,增大环保宣传力度,加强对施工单位的管理,改进施工工艺等提出相应的解决方法,以解决目前建筑施工企业在环境保护方面存在的问题,减少污染,增强人们的环境保护意识。     

常见炼油碱渣处理技术介绍及对比

对近年来关于炼油碱渣的各种处理方法及其应用作了介绍,从投资费用、运行费用、运行管理和安全风险等诸方面进行了对比,并指出生物处理方法是今后炼油碱渣处理的一种趋势.     

事件概率计算机中的一个恒等式

本文提出了一个恒等式,并讨论了它的应用。实践证明,该恒等式可作为一个公式,且非常实用。     

生产环境与生产安全

建设良好的生产环境能有效促进安全生产,搞好生产环境应从搞好硬件建设和软件建设两个方面着手.