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Positive effects of applying endophytic bacteria in eggplant-Sedum intercropping system on Cd phytoremediation and vegetable production in cadmium polluted greenhouse

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Journal of Environmental Sciences 2022年第5期34卷 383-391页

作者： Luyao Ma lukuan huang Qizhen Liu Shunan Xu Zheyu Wen Shuai Qin Tingqiang Li Ying Feng MOE Key Laboratory of Environment Remediation and Ecological Health College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China Agriculture and Rural Bureau of Jinchengjiang District HechiGuangxi 547000China

The combination of intercropping and phytoremediation in the remediation of cadmium contaminated soil is an emerging model in recent years,but the results of previous studies are inconsistent.In the field experiment,eggplant was intercropped with hyperaccumula-tor Sedum alfredii Hance(inoculated or not inoculated with endophytic bacteria)to study the effects of intercropping on vegetable safety production,phytoremediation efficiency of hyperaccumulator and variation of soil available nutrients.The results showed that the in-tercropping treatment had a negative effect on the growth of eggplant and Sedum,but en-dophyte SaMR12 alleviated the inhibition of intercropping on plant growth.Intercropping treatment increases the Cd concentration in edible part of eggplant to 1.34 mg/kg compared with eggplant monoculture(1.19 mg/kg).While the application of SaMR12 reduces the Cd concentration of eggplant fruit to 0.95 mg/kg and significantly promotes the Cd uptake by Sedum.What's more surprising is that compared with eggplant monocropping,the con-tent of soil available nitrogen,phosphorus and potassium in the treatment of intercropping with inoculated Sedum increased significantly.And according to the correlation analysis of various indexes of plants and soil,the Cd content of eggplant is negatively correlated with the available phosphorus and potassium in the soil,while the Cd content of Sedum is positively correlated with it,which suggested that the application of phosphorus and potas-sium fertilizers in this experimental site was beneficial to reduce Cd content in eggplant and improve Cd phytoextraction of Sedum.Therefore,in the daily production of moderately Cd-contaminated soil,intercropping eggplant with Sedum inoculated with endophytic bacteria is an excellent Phytoextraction Coupled with Agro-safe-production(PCA)pattern.

关键词： Endophytic bacteria Solanum melongena L. Cd pollution Phytoremediation Soil fertility

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Soil properties drive the bacterial community to cadmium contamination in the rhizosphere of two contrasting wheat(Triticum aestivum L.)genotypes

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Journal of Environmental Sciences 2023年第6期128卷 117-128页

作者： Min Lu lukuan huang Qiong Wang Xuerui Cao Qiang Lin Zhenli He Ying Feng Xiaoe Yang Key Laboratory of Environmental Remediation and Ecosystem Health Ministry of Education(MOE)College of Environmental and Resources SciencesZhejiang UniversityHangzhou 310058China Tea Research Institute Shandong Academy of Agricultural SciencesJinan 250100China College of Ecology Taiyuan University of TechnologyTaiyuan 030024China Zhejiang Institute of Landscape Plants and Flowers Hangzhou 311251China University of Florida Institute of Food and Agricultural SciencesIndian River Research and Education CenterFort PierceFL 34945USA

Cadmium(Cd)bioavailability in the rhizosphere makes an important difference in grain Cd accumulation in wheat.Here,pot experiments combined with 16S rRNA gene sequencing were conducted to compare the Cd bioavailability and bacterial community in the rhizosphere of two wheat(Triticum aestivum L.)genotypes,a low-Cd-accumulating genotype in grains(LT)and a high-Cd-accumulating genotype in grains(HT),grown on four different soils with Cd contamination.Results showed that there was non-significant difference in total Cd concentration among four soils.However,except for black soil,DTPA-Cd concentrations in HT rhizospheres were higher than those of LT in fluvisol,paddy soil and purple soil.Results of 16S rRNA gene sequencing showed that soil type(52.7%)was the strongest determinant of root-associated community,while there were still some differences in rhizosphere bacterial community composition between twowheat genotypes.Taxa specifically colonized in HT rhizosphere(Acidobacteria,Gemmatimonadetes,Bacteroidetes and Deltaproteobacteria)could participate inmetal activation,whereas LT rhizosphere was highly enriched by plant growth-promoting taxa.In addition,PICRUSt2 analysis also predicted high relative abundances of imputed functional profiles related to membrane transport and amino acid metabolism in HT rhizosphere.These results revealed that the rhizosphere bacterial community may be an important factor regulating Cd uptake and accumulation in wheat and indicated that the high Cd-accumulating cultivar might improve Cd bioavailability in the rhizosphere by recruiting taxa related to Cd activation,thus promoting Cd uptake and accumulation.

关键词： Cadmium(Cd) Bioavailability Rhizosphere Bacterial community Soil type Wheat genotypes

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CFD simulation of flow field and resistance in a 19-core tandem ceramic membrane module

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Chinese Journal of Chemical Engineering 2020年第3期28卷 625-635页

作者： Yujia Tong lukuan huang Weixing Li State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

CFD simulation of the permeation process of a 19-core tandem ceramic membrane module was established to investigate flow field and resistance and its change in permeate flux to the membrane element position and the channel of each membrane element.The results show that when the volume flow rate changes from26 m3·h-1 to 89 m3·h-1,the resistance of each part of the membrane module increases gradually.The increase in resistance loss in the membrane element is faster than the plates and the bell mouths.In a single ceramic membrane module,the maximum difference in flow rate of each membrane tube is 7.23%.In a single membrane tube,the outer ring channels 3–5,3–6,3–7,3–8 are relatively slow.The maximum mass flow deviation from the mean is 2.7%.This work helps to clarify the flow mechanism within the modules,optimize the structure of the equipment and provide a reliable basis for the improvement of industrial ceramic membrane modules.

关键词： Ceramic membrane module CFD Field flow Resistance

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In-situ oriented oxygen-defect-rich Mn-N-O via nitridation and electrochemical oxidation based on industrial-scale Mn_(2)O_(3) to achieve high-performance aqueous zinc ion battery

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Journal of Energy Chemistry 2023年第1期76卷 11-18,I0001页

作者： Yao Liu Shuailong Guo Wei Ling Mangwei Cui Hao Lei Jiaqi Wang Wenzheng Li Qingjiang Liu lukuan Cheng Yan huang Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina Shenzhen Key Laboratory of Flexible Printed Electronics Technology Harbin Institute of TechnologyShenzhen 518055GuangdongChina State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

As a general problem in the field of batteries,materials produced on a large industrial scale usually possess unsatisfactory electrochemical performances.Among them,manganese-based aqueous rechargeable zinc-ion batteries(ARZBs)have been emerging as promising large-scale energy storage systems owing to their high energy densities,low manufacturing cost and intrinsic high safety.However,the direct application of industrial-scale Mn2O3(MO)cathode exhibits poor electrochemical performance especially at high current rates.Herein,a highly reversible Mn-based cathode is developed from the industrial-scale MO by nitridation and following electrochemical oxidation,which triples the ion diffusion rate and greatly promotes the charge transfer.Notably,the cathode delivers a capacity of 161 m Ah g^(-1) at a high current density of 10 A g^(-1),nearly-three times the capacity of pristine MO(60 m Ah g^(-1)).Impressive specific capacity(243.4 m Ah g^(-1))is obtained without Mn^(2+) additive added in the electrolyte,much superior to the pristine MO(124.5 m Ah g^(-1)),suggesting its enhanced reaction kinetics and structural stability.In addition,it possesses an outstanding energy output of 368.4 Wh kg^(-1) at 387.8 W kg^(-1),which exceeds many of reported cathodes in ARZBs,providing new opportunities for the large-scale application of highperformance and low-cost ARZBs.

关键词： Aqueous rechargeable zinc-ion battery Mn-based cathode Oxygen defect Nitridation Electrochemical oxidation

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FRP布约束混凝土圆柱轴心受压性能非线性有限元分析

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中国铁道科学 2008年第1期29卷 46-50页

作者：黄艳亓路宽北京工业大学土木建筑工程学院

采用非线性分析程序ABAQUS,考虑混凝土在三轴状态下的非线性行为及纤维增强材料(FRP)布对混凝土的被动式约束,对轴压下FRP布约束混凝土圆柱试件的受力行为进行分析,研究FRP布与混凝土的相互作用以及纤维含量对约束混凝土极限强度和极限... 详细信息

采用非线性分析程序ABAQUS,考虑混凝土在三轴状态下的非线性行为及纤维增强材料(FRP)布对混凝土的被动式约束,对轴压下FRP布约束混凝土圆柱试件的受力行为进行分析,研究FRP布与混凝土的相互作用以及纤维含量对约束混凝土极限强度和极限应变的影响。结果表明:非线性有限元分析结果与实验结果吻合良好,非线性有限元分析可较好预测FRP布约束混凝土柱的轴心受压性能;随着FRP布层数的增加,FRP布约束混凝土的极限强度和极限应变提高,FRP布对混凝土的约束作用明显增强;FRP布对混凝土约束力主要在混凝土屈服后发挥。根据实验和有限元分析结果,得到约束混凝土极限强度和极限应变与纤维约束特征值的关系。

关键词： FRP布约束混凝土轴压极限强度极限应变非线性有限元分析

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发育高温对烟粉虱及其优势寄生蜂适合度和同步性的影响

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中国农业科技导报 2023年第5期25卷 131-138页

作者：冯雪莹王路宽黄玉翠杨春萍徐海云河北大学生命科学学院河北保定071002

为揭示气候变暖背景下温度升高对农业害虫-天敌系统的作用规律,研究不同程度高温条件对烟粉虱及其优势寄生蜂丽蚜小蜂适合度和同步性的影响。分别于恒定适温(26℃)和高/适温交替(30/26、34/26和38/26℃)条件下逐日观察统计烟粉虱和丽蚜... 详细信息

为揭示气候变暖背景下温度升高对农业害虫-天敌系统的作用规律,研究不同程度高温条件对烟粉虱及其优势寄生蜂丽蚜小蜂适合度和同步性的影响。分别于恒定适温(26℃)和高/适温交替(30/26、34/26和38/26℃)条件下逐日观察统计烟粉虱和丽蚜小蜂成虫前期各阶段的发育历期、存活率和初羽化雌成虫个体大小,并解剖初羽化丽蚜小蜂雌蜂卵巢,统计其抱卵量及卵子长度。结果显示,烟粉虱卵-1龄若虫、2龄若虫和3龄若虫各阶段的发育历期随着温度的升高而逐渐缩短;整个成虫前期的发育历期在30/26、34/26和38/26℃高/适温交替条件下比26℃恒定适温下分别缩短1.6、1.9和4.4 d;34/26和38/26℃时初羽化雌成虫个体明显变小。高/适温交替条件下丽蚜小蜂卵-幼虫期和蛹期的发育历期均明显缩短;整个成虫前期的发育历期在30/26、34/26和38/26℃温度下比26℃适温下分别缩短2.2、2.0和3.0 d;随着温度的升高,丽蚜小蜂初羽化雌蜂个体变小,卵巢内成熟卵子数量显著下降。由此可见,发育温度的升高,显著影响烟粉虱和丽蚜小蜂的适合度,二者的同步性发生改变。研究结果表明在生防实践中应充分考虑环境温度变化对烟粉虱及寄生蜂影响的差异性,合理制定烟粉虱的生防策略。

关键词：发育高温烟粉虱丽蚜小蜂适合度生物防治

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基于蓝牙技术的智能灯控制系统设计

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黄河科技学院学报 2019年第5期21卷 62-64页

作者：黄婉悦张席克黄毅王路宽黄河科技学院信息工程学院

以AT89C52作为控制核心,在自动控制的基础上,结合蓝牙模块与手机APP,对灯具照明实现了无线近距离控制.该系统控制部分主要有系统初始化程序、红外热释传感器处理程序、光检测处理程序、蓝牙通讯程序几部分组成,代码采用C语言程序编写,... 详细信息

以AT89C52作为控制核心,在自动控制的基础上,结合蓝牙模块与手机APP,对灯具照明实现了无线近距离控制.该系统控制部分主要有系统初始化程序、红外热释传感器处理程序、光检测处理程序、蓝牙通讯程序几部分组成,代码采用C语言程序编写,由于该系统具有实时控制方便、节约能源、适用性强等诸多优点,可应用于智能家居、智能楼宇、楼道灯控等诸多场所.

关键词： AT89C52单片机蓝牙智能灯

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快速实现基于FPGA的脉动FIR滤波器

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电子工程师 2007年第3期33卷 32-34,42页

作者：邓路宽程翥皇甫堪国防科学技术大学电子与科学工程学院信号处理室

基于FPGA(现场可编程门阵列)器件内部集成的数字信号处理模块,利用QuartusⅡ中宏功能模块定制4阶卷积运算单元,利用VHDL(甚高速集成电路硬件描述语言)元件例化语句生成脉动阵列结构FIR(有限冲击响应)滤波器。研究了并利用PE(处理单元)... 详细信息

基于FPGA(现场可编程门阵列)器件内部集成的数字信号处理模块,利用QuartusⅡ中宏功能模块定制4阶卷积运算单元,利用VHDL(甚高速集成电路硬件描述语言)元件例化语句生成脉动阵列结构FIR(有限冲击响应)滤波器。研究了并利用PE(处理单元)结构时序约束和加法树结构的加法阵列优化设计性能。与已有的实现方法相比,文中提出的方法具有更短的设计周期、更强的可移植性、更高的工作频率和实时处理信号的能力。

关键词： VHDL 脉动阵列 PE处理单元 FIR滤波器

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