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101.
Yuan Zhengqiu Yang Huizhi Xu Pan Li Chengfeng Jian Jian Zeng Jianxian Zeng Lingwei Sui Yuguang Zhou Hu 《Environmental science and pollution research international》2021,28(6):6411-6421
Environmental Science and Pollution Research - In this work, various photocatalysts were synthesized with an impregnation-precipitation process to in situ decorate Ag-based nanoparticles (NPs,... 相似文献
102.
Tao Lei Wang Langlang Zhou Yangjie Hu Ningmeng Cai Jun Chen Xiaoyu Wang Xueqian Ning Ping 《Environmental science and pollution research international》2021,28(35):48417-48426
Environmental Science and Pollution Research - The abatement of SO2 and the utilization of copper tailings are identified as two attention-attracting environmental issues in the copper smelter. In... 相似文献
103.
Wei Baokai Liu Chen Bao Junsong Wang Ying Hu Jicheng Qi Min Jin Jun Wei Yongjie 《Environmental science and pollution research international》2021,28(3):2696-2706
Environmental Science and Pollution Research - Polycyclic aromatic hydrocarbons (PAHs) in air, soil, and cultivated plants at e-waste disposal sites in Taizhou, Zhejiang Province, were determined... 相似文献
104.
Rainwater contains substantial bacteria and rain is an efficient pathway for the dissemination of bacteria from the atmosphere to land and water surfaces.However,quantitative information on rainwater bacteria is very limited due to the lack of a reliable method.In this study,the epifluorescence microscopy enumeration with the LIVE/DEAD BacLight Bacterial Viability Kit stain was verified to quantify the abundance of viable and non-viable bacterial cells in rainwater,with the 4',6-diamidino-2-phenylindole(DAPI) stain for the reference of total cell counts.Results showed that the total counts of bacterial cells by LIVE/DEAD BacLight staining were consistent with those by DAPI staining,and the average detection efficiency was(109 ± 29)%.The ratio of cell count with glutaraldehyde fixation to that without fixation was(106 ± 5)%on average.The bacterial concentration in negative control was usually an order of magnitude lower than that in rainwater samples.However,in case of small precipitation,the abundance in negative control could be more than that in rainwater samples.These results indicate that the enumeration with LIVE/DEAD BacLight bacterial viability assay coupled with glutaraldehyde fixation and careful negative control investigation is an approach applicable to the measurement of the concentration and viability of bacterial cells in rainwater. 相似文献
105.
Engineered oxide nanoparticles (NPs) are widely applied in insulators, catalyzers, paints, cosmetic products, textiles and semiconductors. Their attachment on cell membrane may lead to cytotoxicity. The effects of Al2O3, Fe2O3, SiO2, TiO2 and ZnO NPs on membrane integrity and fluidity were studied using giant or small unilamellar vesicles in this study. Al2O3 and SiO2 NPs disrupted the oppositely charged membrane, indicating the important role of electrostatic attraction. However, Fe2O3, TiO2 and ZnO NPs did not cause serious membrane disruption as Al2O3 and SiO2 NPs. Membrane fluidity was evaluated by the generalized polarity (GP) values of Laurdan fluorescent emission. SiO2 NPs induce the membrane gelation of both positively and negatively charged membrane. Al2O3 and ZnO NPs induced the gelation of the oppositely charged membrane, but did not cause obvious membrane gelation to the like charged membrane. The phospholipid molecular structural changes after NP exposure were analyzed by Fourier transform infrared (FT-IR) spectroscopy. FT-IR spectra revealed the hydrogen bond formation between NPs and the carbonyl/phosphate groups of phospholipids. Al2O3 and SiO2 NPs showed strongest evidence of hydrogen bonding on their FT-IR spectra. It was consistent with the microscopic observation and fluorescent data that Al2O3 and SiO2 NPs caused more serious membrane disruption and gelation. This study on membrane damage provides further knowledge on the cytotoxicity of nanomaterials and the safety of NP application. 相似文献
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A simple approach to enhance the photocatalytic activity of red phosphorus(P) was developed.A mechanical ball milling method was applied to reduce the size of red P and to deposit graphene quantum dots onto red P. The product was characterized by scanning electron microscopy, transmission electron microscopy, contact angle measurements, zeta-potential measurements, X-ray diffraction and UV–vis absorption spectroscopy. The product exhibited high visible-light-driven photocatalytic performance in the photodegradation of rhodamine B. 相似文献
109.
CGS(CO2地质储存)是CO2减排的重要手段之一,天然裂隙的存在则是CGS的潜在风险.CO2地质储存过程中储层上覆盖层及其浅部含水层是防止CO2泄漏的天然屏障,为了探究深部咸水层中CO2沿断层的泄漏过程并获得断层渗透率及储层中超临界CO2流体初始条件(初始饱和度、初始泄漏压力)对CO2沿断层泄漏速率和泄漏量的影响程度,依据鄂尔多斯CO2灌注工程示范区资料,使用多相、多组分溶质运移数值模拟软件TOUGH2建立了2D概念模型.结果表明,深部咸水层中的CO2在压力差和浓度差的作用下沿断层发生泄漏,到达浅部含水层后开始发生侧向运移,100 a内运移了约200 m的水平距离;由于浮力的作用,CO2集中在含水层顶板处,有效地防止了CO2向外泄漏.影响因素分析表明,100 a内断层渗透性能为低渗、中渗和高渗条件时,CO2累积泄漏量分别为0、1 050和3 000 t;CO2初始饱和度分别为0.20、0.50和0.99时,CO2累积泄漏量分别为550、1 050和1 650 t;初始泄漏压力分别为17.3、17.6和18.1 MPa时,CO2累积泄漏量则分别为900、1 050和1 400 t.除此之外,断层渗透性、CO2初始气体饱和度和初始泄漏压力对CO2泄漏的影响还体现在泄漏发生时间和平均泄漏速率上.研究显示,各因素对CO2沿断层泄漏过程的影响程度表现为断层渗透性能> CO2初始饱和度> CO2初始泄漏压力. 相似文献
110.