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Novel enhancement strategy for Hg adsorption in wastewater: Nonthermal plasma-mediated advanced modification of zero-valent iron-carbon galvanic cells with thiol functionalization

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JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025年 375卷 124108页

作者： Song, Dongping Huang, Tao Feng, Yuxuan Xie, Shihong Wang, Chenglong Fang, Qi Wang, Baijun Zhang, shuwen ren, Jie Changshu Inst Technol Sch Mat Engn Changshu 215500 Peoples R China Northeast Petr Univ Coll Chem & Chem Engn Daqing 163318 Peoples R China Univ South China Nucl Resources Engn Coll Hengyang 421001 Peoples R China King Fahd Univ Petr & Minerals Interdisciplinary Res Ctr Construct & Bldg Mat Dept Mat Sci & Engn Dhahran 31261 Saudi Arabia

Mercury (Hg) pollution poses a critical threat to human health and the environment, necessitating urgent control measures. This study introduces a novel modification method for the common zero-valent iron-carbon (ZVI-AC) galvanic cells using a two-step process, nonthermal (NTP) irradiation followed by targeted functionalization, aiming to enhance Hg adsorption potential by adjusting the physicochemical properties of the cells. The NTP irradiated functionalized adsorbent demonstrated superior Hg adsorption performance across various concentrations and pH variations. Multichannel adsorption mechanisms were confirmed by fitting a total of 22 different adsorption isotherm models, indicating the coexistence of monolayer and multilayer adsorption processes. The NTP irradiation modifies the ZVI and AC, inducing nitrogen and oxygen doping on carbon-based surfaces and oxidizing ZVI to Fe(II)-Fe(III) species. The deepened oxidation of Fe in NTP-Fe-C, coupled with Hg2+ reduction to elemental Hg by raw Fe, contributed to Hg removal. NTP irradiation facilitated electron transfer between Fe and Hg, promoting oxidation of Fe and reduction of Hg2+ cations. The emergence of diverse Hg species further supported the multichannel adsorption/removal mechanism achieved by NTP-irradiated cells. This method offers a promising solution to Hg pollution and expands the application of the traditional iron-carbon galvanic cells in treating hazardous heavy metal wastes.

关键词： Mercury contamination Nonthermal plasma Zero-valent iron-carbon galvanic cells Thiol functionalization Multichannel mechanism

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Diversity and function of soil microorganisms in response to paddy-upland rotation system in sustainable restoration of saline-sodic soils

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SOIL RESEARCH 2023年第6期61卷 582-597页

作者： Liu, Jin Wang, Shunyi Hu, Canmin Li, Tingting Wang, Tianhao Ma, Ke ren, Xueqin Hu, shuwen China Agr Univ Coll Resources & Environm Sci Beijing 100193 Peoples R China Shaanxi Inst Geol Survey Xian 710068 Peoples R China Beijing Key Lab Farmland Soil Pollut Prevent & Rem Beijing 100193 Peoples R China Agr & Rural Bur Hekou Dist Dongying 257299 Peoples R China

Context. Rapid desalination by planting rice in saline soil consumes large amounts of water, which is not environmentally friendly. Aims. Herein, we propose rapid desalination by planting rice, then shifting to cultivating upland plants to attain substantial resource-saving and higher yield simultaneously with restoration of saline-sodic soil. Methods. Field experiments were run for two consecutive years with five treatments: unreclaimed wasteland (WL) as control, rice cultivation followed by fallow (RF), rice-rice continuous cropping (RR), rice-ryegrass rotation (RG), and rice- sorghum rotation (RS). Physicochemical properties, including pH, electrical conductivity, and exchangeable sodium percentage were determined, and 16S rRNA sequences were used to evaluate soil microbial composition and stability. Key results. The soil total organic carbon, total nitrogen, available phosphorus, and biomass in RR, RG, and RS treatments were all higher than RF and control. Notably, RR, RG, and RS increased the soil microbial biomass carbon and nitrogen, and significantly reshaped the soil communities of bacteria, fungi, and archaea relative to RF and WL. Conclusions. Despite the lower efficiency of RG and RS in ameliorating saline-sodic soil, there were dramatic savings in irrigation water, and the improvements in microbial diversity and functionalities indicated that the paddy-upland crop rotation system had substantial influence on sustainability of soil quality. Implications. Providing a balance between salt desalination performance with irrigation water input and yield, the paddy-upland rotation system is a robust, replicable, and environmentally friendly practice in saline-sodic soil remediation.

关键词： microbial diversity paddy-upland rotation remediation resource-saving saline-sodic soils soil microorganism stability sustainability

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蒙华铁路荆门李家湾跨焦柳线特大桥无缝线路设计方案研究

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铁道建筑 2020年第2期60卷 101-104页

作者：刘亚航冯杜炀任树文丁静波中铁工程设计咨询集团有限公司轨道工程设计研究院北京100055

重载铁路轴重大、运量高,且大多从山区通过,曲线半径严重受限,这对桥上无缝线路的强度及稳定性非常不利。本文结合蒙西至华中铁路煤运通道荆门李家湾跨焦柳线特大桥,在减少钢轨伸缩调节器设置的前提下,建立梁-轨有限元计算模型,通过钢... 详细信息

重载铁路轴重大、运量高,且大多从山区通过,曲线半径严重受限,这对桥上无缝线路的强度及稳定性非常不利。本文结合蒙西至华中铁路煤运通道荆门李家湾跨焦柳线特大桥,在减少钢轨伸缩调节器设置的前提下,建立梁-轨有限元计算模型,通过钢轨和墩台附加纵向力以及断缝值比选3种扣件铺设方案,得出采用零阻力扣件方案既可降低梁轨相互作用,又能保证线路具有足够的稳定性。

关键词：重载铁路蒙华铁路桥上无缝线路有限元分析附加纵向力可滑动扣件

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Subduction characteristics of the ordovician erlangping back-arc basin in the east qinling mountains, china: implications for the tectonic evolution of the northern margin of the proto-tethys ocean

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INTERNATIONAL GEOLOGY REVIEW 2023年第7期65卷 1203-1223页

作者： Li, Zhenqiang ren, Shenlian Dong, shuwen Li, Jiahao Song, Chuanzhong Yang, Qinliang Zhang, Gang Hefei Univ Technol Sch Resources & Environm Engn Hefei 230009 Peoples R China Nanjing Univ Sch Elect Sci & Engn Nanjing Peoples R China

A relatively complete trench-arc-basin system developed on the northern margin of the Proto-Tethys Ocean, and its subduction mode is key in reconstructing the tectonic evolution of the northern Proto-Tethyan margin. The Erlangping Group in the East Qinling Mountains is thought to be the product of subduction in the back-arc basin. Analysis of the metamorphism and deformation recorded by the group may elucidate the subduction mode of the back-arc basin. In this study, the tectonites in the southern and northern parts of Erlangping Group are taken as the research object, and their dynamic parameters such as geometry, kinematics and vorticity are determined by field observation and indoor tectonic deformation analysis. Deformed rocks in the northern part of the Erlangping Group are mainly feldspathic schists, primary mylonite, and mylonite, and the deformed rocks in the southern part of the Erlangping Group are mainly schists. The geometric characteristics of Erlangping group show that the foliation (30 degrees-60 degrees angle 42 degrees-70 degrees) and dip lineation (5 degrees-62 degrees angle 33 degrees-51 degrees) in the north of Erlangping group incline to NE, while the foliation (174 degrees-234 degrees angle 50 degrees-80 degrees) and dip lineation (195 degrees-230 degrees angle 45 degrees-65 degrees) in the South incline to SW;the kinematic characteristics show that both sides of Erlangping Group move under Qinling Group and Kuanping Group, respectively. Kinematic vorticity calculation shows that the vorticity values of the northern and southern parts of Erlangping Group are 0.79 and 0.78, respectively, both of which are more than 0.75, indicating that the shear type is dominated by simple shear and supplemented by pure shear. The average values of kinematic vorticity on the northern and southern parts of Erlangping Group are 0.78 and 0.79, respectively, both more than 0.75, indicating that subduction was dominated by simple shear, with minor pure shear deforma

关键词： Central China Orogenic Belt northern Proto-Tethyan margin early Palaeozoic erlangping Group back-arc basin subduction tectonic deformation

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钢弹簧浮置板轨道过渡段动力性能影响分析

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山西建筑 2019年第11期45卷 99-101页

作者：任树文中铁工程设计咨询集团有限公司

钢弹簧浮置板轨道具有良好的减振性能,但其过渡段的设置成为设计中的难点。针对影响钢弹簧浮置板轨道过渡段动力性能的参数进行研究,考虑的参数主要有弹簧加密方式、弹簧刚度、相邻轨道形式、列车速度。基于正交实验的理论,建立三维有... 详细信息

钢弹簧浮置板轨道具有良好的减振性能,但其过渡段的设置成为设计中的难点。针对影响钢弹簧浮置板轨道过渡段动力性能的参数进行研究,考虑的参数主要有弹簧加密方式、弹簧刚度、相邻轨道形式、列车速度。基于正交实验的理论,建立三维有限元动力模型,采用移动轮对荷载进行动力仿真计算,获得不同参数组合下的钢轨和浮置板的动态位移和加速度,分析过渡段动力性能主要影响因素。参数分析结果可为钢弹簧浮置板轨道过渡段的设计提供参考依据。

关键词：钢弹簧浮置板过渡段动力性能参数分析

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减振垫浮置板整体道床结构设计研究

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山西建筑 2019年第12期45卷 104-106页

作者：任树文中铁工程设计咨询集团有限公司

从三维实体建模着手,结合车辆、土建等设计接口资料,通过计算不同工况下减振垫轨道板的变形及弯矩,进行比较选择最佳设计方案,以便指导减振垫浮置板整体道床结构设计。

关键词：减振垫位移弯矩结构设计地基模量

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Nanoscale Refractive Index Sensor Based on an MIM Waveguide Coupled to U-Shaped Ring Resonator with Three Stubs for Alcohol Solution Concentration Detection

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PLASMONICS 2024年第5期19卷 2421-2432页

作者： Cao, Yuhao Yan, Shubin Liu, Feng Wang, Jin Chang, shuwen Liu, Guang Zhang, Wei Wu, Taiquan ren, Yifeng North Univ China Sch Elect & Control Engn Taiyuan 030051 Peoples R China Zhejiang Univ Water Resources & Elect Power Sch Elect Engn Hangzhou 310018 Peoples R China Joint Lab Intelligent Equipment & Syst Water Conse Hangzhou 310018 Peoples R China

In this paper, a nano refractive index sensor consisting of a metal-insulator-metal (MIM) waveguide and a U-shaped ring resonator with three stubs (URRS) resonator is proposed. The transmittance performance of the sensor was theoretically analyzed using the finite element method (FEM). The effects of refractive index and different structural geometrical parameters on the sensor performance were evaluated. The optimal sensitivity of the designed refractive index sensor structure is 2900 nm/RIU, and the figure of merit (FOM) is 55.76. The suggested sensor shows promising potential for utilization in the study of alcohol solution concentration detection. In addition, we applied this sensor structure in the field of alcohol solution concentration detection, and its test results were good with a sensitivity up to 112.

关键词： Fano resonance Metal-insulator-metal (MIM) waveguide U-shaped ring resonator with three stubs structure Nanoscale refractive index sensor

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Single-Cell Transcriptome Atlas of Leaves at Different Developmental Stages in Populus alba x Populus glandulosa Clone 84K

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FORESTS 2024年第3期15卷 512页

作者： Jing, Yanchun ren, Yongyu Zhang, shuwen Kang, Xiangyang Beijing Forestry Univ Coll Biol Sci & Biotechnol Natl Engn Res Ctr Tree Breeding & Ecol Restorat State Key Lab Tree Genet & Breeding Beijing 100083 Peoples R China Henan Agr Univ Coll Forestry Zhengzhou 450046 Peoples R China

Leaves are crucial photosynthetic plant organs. The development of poplar leaves has spatio-temporal specificity and it is of great significance to study the single-cell transcription atlas of leaves to reveal the temporal regulation of gene expression in different cell types. Here, single-cell RNA sequencing was performed on 17,768 tender leaf and 5846 functional leaf cells of Poplar 84K to construct a transcriptome atlas and developmental trajectory. The results showed that there were five and six cell types in tender and functional leaves, respectively. According to a pseudo-time trajectory analysis and the clustering of expressed genes into different cell types, the development of tender and functional leaves was divided into two temporal stages. Tender leaf epidermal cells developed earliest and were enriched with genes related to cell division and growth, indicating that tender leaves were in the stage of cell expansion and functional differentiation. Functional leaf palisade mesophyll cells were enriched with genes related to photosynthesis and carbon metabolism and cell types performing different functions tended to mature, indicating that functional leaves were in the stage of leaf development and the initial formation of photosynthesis. Our in-depth analysis of the transcriptional regulation at the single-cell level during leaf development provides an important basis for studying the mechanisms involved in cell differentiation and leaf development in poplar as well as other plants.

关键词： leaf cell types single-cell RNA sequencing temporal transcriptome atlas

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Immobilizing arsenic in soil via amine metal complex: a case study using iron-ethylenediamine

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Environmental Science and Pollution Research 2023年第18期30卷 51942-51954页

作者： Lv, Qilin Zhou, Tairan Wang, Tianhao Wang, Shuhan Ge, Yanning Song, Yuling ren, Xueqin Hu, shuwen College of Resources and Environment Sciences China Agricultural University No. 2 Yuanmingyuan West Road Haidian District Beijing100193 China Beijing Key Laboratory of Farmland Soil Pollution Prevention-Control and Remediation College of Resources and Environmental Sciences China Agricultural University No. 2 Yuanmingyuan West Road Beijing100193 China Hekou District Agricultural and Rural Bureau Shandong Province Dongying City257200 China

Fe-based nanomaterials have been extensively investigated for their application in mitigating arsenic (As) pollution in groundwater, sediment, and soils. Here, an iron-ethylenediamine (Fe-EDA) complex was synthesized and characterized using Fourier transform-infrared spectroscopy and X-ray photoelectron spectroscopy before its use as an amendment to ameliorate As-polluted soils. Column leaching tests at three Fe-EDA application rates (1%, 3%, and 5%) were conducted, and their results were compared with those acquired after using nano zerovalent iron (nZVI) and Fe3O4, to assess their efficiency to amend As-contaminated paddy soils. After leaching, stabilization efficiency and soil chemical characteristics were determined. Additionally, As fractions were measured using inductively coupled plasma–mass spectroscopy by employing a sequential extraction procedure to evaluate the performance of the treatments and understand the underlying their mechanisms. Compared with the control treatment, the Fe-EDA treatment reduced As release by more than 35.33% in the 2nd leaching cycle, whereas nZVI and Fe3O4 decreased the As release by 11.84% and 24.60%, respectively. Moreover, the optimal addition of the Fe-EDA chelate was 5%, which stabilized more than 50% As in the soil from the 7th to 11th leaching cycles. After sequential extraction, the Fe–Mn oxide binding fraction, which was originally 12.65%, increased to 21.5%, 18.23%, and 21.71% after the application of nZVI, Fe3O4, and Fe-EDA amendments, respectively. Furthermore, our treatments promoted the binding of the As fraction with crystalline Fe (III) (oxyhydr)oxide (F3);however, other fractions did not increase considerably, suggesting that the Fe-EDA complex could effectively stabilize As through electrostatic attraction between the arsenate anion and EDA, as well as As-O-Fe bond formation via a coordinating reaction. Overall, Fe-EDA was found to be a potent amendment for mitigating As-polluted soil. © 2023, The Author(s), un

关键词： Stabilization

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Morphological and physiological response of rice roots to the application of calcium polyamino acid under saline-alkali soil conditions

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ARCHIVES OF AGRONOMY AND SOIL SCIENCE 2023年第6期69卷 891-904页

作者： Du, Xuejun Wang, Shunyi Feng, Haojie Xu, Zijun Liu, Jin ren, Xueqin Gao, Zideng Hu, shuwen China Agr Univ Coll Resources & Environm Sci Beijing Haidian Peoples R China Shandong Agr Univ Coll Resources & Environm Natl Engn Lab Efficient Utilizat Soil & Fertilize Tai An Shandong Peoples R China China Agr Univ Beijing Key Lab Farmland Soil Pollut Prevent & Re Beijing Haidian Peoples R China

Although application of calcium polyamino acid (Ca-polyAA) is one of the effective ways to improve saline-alkali soil and promote plant growth, the clear mechanisms are unknown. A two-year field experiment with four Ca-polyAA application treatments (added at rates of 0, 7.5, 15.0, and 22.5 x 10(3) kg ha(-1)) was conducted on saline-alkali soil in Songnen Plain of China. In the first year (2016), Ca-polyAA increased soil porosity and decreased pH, electrical conductivity (EC1:5) and exchangeable sodium percentage (ESP). Root Na+/K+ and Na+/Ca2+ ratio were reduced whereas hydraulic conductivity was increased. The hormone concentration and enzyme activity in the root were enhanced at tillering stage. Root structure development at the root tip was promoted after the application of Ca-polyAA. The total root length, surface area, volume and biomass were increased by increasing Ca-polyAA added rate. Similar results were obtained in the second year (2017). Path analysis demonstrate that Ca-polyAA can promote the accumulation of root biomass mainly by decreasing Na+/ K+ ratio, increasing root hydraulic conductivity and the activity of carbon metabolism enzymes, and the development of the root cortex. These results revealed that Ca-polyAA, as an efficient ameliorator, is capable to enhance agronomical and morphophysiological traits of rice in saline-alkali soil.

关键词： Saline-alkali soil rice root root anatomical structure Ca-polyAA

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