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数字经济赋能共同富裕的效应机制与实践进路

科技智囊 2024年第1期 33-42页

作者：王红光刘广莉赣南师范大学马克思主义学院江西赣州341000

数字经济与共同富裕是新发展阶段推动我国高质量发展的两个重要议题。数字经济是我国高质量发展的重要源泉,它对推进共同富裕的实现具有重要作用。在阐述数字经济与共同富裕的深刻意蕴基础上,数字经济以其自身独特的创新效应、协调效应... 详细信息

数字经济与共同富裕是新发展阶段推动我国高质量发展的两个重要议题。数字经济是我国高质量发展的重要源泉,它对推进共同富裕的实现具有重要作用。在阐述数字经济与共同富裕的深刻意蕴基础上,数字经济以其自身独特的创新效应、协调效应、普惠效应及溢出效应,分别从全面富裕、全民富裕、共建共富和渐进富裕四个方面赋能共同富裕;数字经济赋能共同富裕实现过程中出现的经济发展后劲不足、城乡和区域发展不平衡、群众积极主动性不高、市场秩序紊乱等问题得以提出,并从推动公共服务数字化、加快数字技术创新、缩小数字鸿沟差距、加强政策扶持等方面凝练出推动共同富裕的实现进路,以期高效推动共同富裕的实现。

关键词：数字经济数字技术共同富裕效应机制

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斜螺旋式旋转空化喷嘴性能仿真研究

石油机械 2024年第9期52卷 27-35页

作者：陈效平何志鹏刘广力敖鑫文学刘志辉邵阳学院高效动力系统智能制造湖南省重点实验室西华大学机械工程学院

针对旋转空化喷嘴(Spin Cavitation Nozzle,SCN)开采天然气水合物时能耗高、效率低的问题,设计了一种斜螺旋式旋转空化喷嘴(Oblique Spiral type Spin Cavitation Nozzle,OSSCN)。基于CFD方法,对OSSCN、SCN以及收缩-扩张型喷嘴(Contraction-Dilatation Cavitation Nozzle,CDCN)进行性能对比分析。仿真分析结果表明:与CDCN相比,OSSCN和SCN流场中空化泡的分布更广泛、空化性能更优,且对水合物碎片有着更强的卷吸能力;与SCN相比,OSSCN在水合物壁面处产生的液压冲击能量更大,其径向流速更高,对水合物壁面产生的冲蚀效果更佳;OSSCN的斜螺旋叶轮结构极大地降低了喷嘴液阻、减小了能耗,在与SCN性能相差不大的情况下,OSSCN较SCN降低了约39%的能耗,展现出高效节能的优势。该设计可为空化射流钻水平井+衬管完井技术的商业化应用提供技术支持。

关键词：空化射流钻井旋转空化喷嘴斜螺旋面天然气水合物计算流体力学射流冲蚀空化性能卷吸性能

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Fe/N co-doped nano-TiO_(2)wrapped mesoporous carbon spheres for synergetically enhanced adsorption and photocatalysis

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Journal of Materials Science & Technology 2023年第4期135卷 54-64页

作者： Xiaotong Feng Lifen Gu Naiyu Wang Qiaosheng Pu guangli liu Lanzhou Petrochemical Research Center Petrochemical Research InstitutePetrochinaLanzhou 730060China State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical engineeringLanzhou UniversityLanzhou 730000China

Carbon-based adsorption and TiO_(2)-based photocatalysis are both safe and low-cost ways of pollutant *** C-TiO_(2)architectures can effectively improve removal ***,most of those carbon frames only acted as supporting substrates,exhibiting rather limited synergistic action from TiO_(2)and ***,Fe/N co-doped nano-TiO_(2)wrapped on mesoporous carbon spheres with a core-shell structure was *** Fe,N co-doped carbon sphere with a hierarchical structure im-proved the synergy of adsorption and transfer during the photocatalytic *** extra dopant,the Fe and N partly exposed on the surface realized the in-situ migrating into the TiO_(2)shell to en-hance the interface effect,which significantly promoted the photocatalytic efficiency of the ***,the photocatalytic efficiency of the composite was investigated through two typical pollu-tants under visible-light *** degradation efficiencies for rhodamine B and paraxylene were 96.2%in 60 min and 94.1%in 20 min,respectively,with the apparent rate constant of 0.045 min^(-1)and 0.049 min^(-1),8.3 and 11.4 times of that for bare TiO_(2).The composite is likely advantageous for treating diverse environmental pollutants.

关键词： Adsorption-photocatalysis Porous carbon Nano-TiO_(2) Core-shell structure Co-doping

Diversity and vertical distributions of sediment bacteria in an urban river contaminated by nutrients and heavy metals

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Frontiers of Environmental Science & Engineering 2013年第6期7卷 851-859页

作者： Xunan YANG Shan HUANG Qunhe WU Renduo ZHANG guangli liu Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-sen University Guangzhou 510275 China

The aim of this study was to investigate the benthic bacterial communities in different depths of an urban river sediment accumulated with high concentrations of nutrients and metals. Vertical distributions of bacterial operational taxonomic units （OTUs） and chemical para- meters （nutrients： NH4＋, NO3, dissolved organic carbon, and acid volatile sulfur; metals： Fe, Zn, and Cu） were characterized in 30 cm sediment cores. The bacterial OTUs were measured using the terminal restriction fragment length polymorphism analysis. Biodiversity indexes and multivariate statistical analyses were used to characterize the spatial distributions of microbial diversity in response to the environmental parameters. Results showed that concentrations of the nutrients and metals in this river sediment were higher than those in similar studies. Furthermore, high microbial richness and diversity appeared in the sediment. The diversity did not vary obviously in the whole sediment profile. The change of the diversity indexes and the affiliations of the OTUs showed that the top layer had different bacterial community structure from deeper layers due to the hydrological disturbance and redox change in the surface sediment. The dominant bacterial OTUs ubiquitously existed in the deeper sediment layers （5-27 cm） corresponding to the distributions of the nutrients and metals. With much higher diversity than the dominant OTUs, the minor bacterial assemblages varied with depths, which might be affected by the sedimentation process and the environmental competition pressure.

关键词： heavy metals nutrients sediment profile,terminal restriction fragment length polymorphism

果生刺盘孢致病关键转录因子CfCrzA的功能

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菌物学报 2024年第1期43卷 45-57页

作者：卢一鸣刘广利杨文睿梁晓飞孙广宇张荣西北农林科技大学植物保护学院旱区作物逆境生物学国家重点实验室、植保资源与病虫害治理教育部重点实验室、农业农村部西北黄土高原作物有害生物综合治理重点实验室陕西杨凌712100

由果生刺盘孢Colletotrichumfructicola引起的苹果炭疽叶枯病是我国苹果上的一种新病害。前期通过组学分析发现一个在侵染早期表达的转录因子CfCrzA,本研究拟明确其在果生刺盘孢生长发育和致病中的作用。生物信息学分析显示,CfCrzA为刺... 详细信息

由果生刺盘孢Colletotrichumfructicola引起的苹果炭疽叶枯病是我国苹果上的一种新病害。前期通过组学分析发现一个在侵染早期表达的转录因子CfCrzA,本研究拟明确其在果生刺盘孢生长发育和致病中的作用。生物信息学分析显示,CfCrzA为刺盘孢属保守基因。采用同源重组方法获得2个敲除突变体。表型分析显示,突变体ΔCfCrzA与野生型WT生长速率无明显差别;致病性测定显示,ΔCfCrzA对苹果叶片和果实致病力显著下降。玻璃纸接种试验显示ΔCfCrzA孢子萌发率降低26%±3%,附着胞形成率降低43%±1%;叶片组织学观察发现ΔCfCrzA附着胞形成率降低60%±1%,但侵染泡囊和初生菌丝形成不受影响。培养发现ΔCfCrzA对细胞壁胁迫相关SDS的敏感性显著提升。这些结果表明转录因子CfCrzA为果生刺盘孢的关键致病因子,主要通过影响分生孢子萌发、附着胞形成等影响其致病力。

关键词：果生刺盘孢苹果转录因子C2H2 炭疽叶枯病

Comparison of the removal of monovalent and divalent cations in the microbial desalination cell

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 317-323页

作者： Shanshan CHEN Haiping LUO Yanping HOU guangli liu Renduo ZHANG Bangyu QIN Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-sen University Guangzhou 510275 China

Microbial desalination cell （MDC） is a promis- ing technology to desalinate water and generate electrical power simultaneously. The objectives of this study were to investigate the desalination performance of monovalent and divalent cations in the MDC, and discuss the effect of ion characteristics, ion concentrations, and electrical characteristics. Mixed salt solutions of NaC1, MgC12, KC1, and CaC12 with the same concentration were used in the desalination chamber to study removal of cations. Results showed that in the mixed salt solutions, the electrodialysis desalination rates of cations were： Ca2＋〉 Mg2＋〉 Na＋〉 K＋. Higher ionic charges and smaller hydrated ionic radii resulted in higher desalination rates of the cations, in which the ionic charge was more important than the hydrated ionic radius. Mixed solutions of NaC1 and MgC12 with different concentrations were used in the desalination chamber to study the effect of ion concentra- tions. Results showed that when ion concentrations ofNa＋ were one-fifth to five times of Mg2~, ion concentration influenced the dialysis more profoundly than electrodia- lysis. With the current densities below a certain value, charge transfer efficiencies became very low and the dialysis was the main process responsible for the desalination. And the phosphate transfer from the anode chamber and potassium transfer from the cathode chamber could balance 1%-3% of the charge transfer in the MDC.

关键词： divalent ion electrodialysis ion characteristic,microbial desalination cell monovalent ion

Evaluation of soil microbial toxicity of waste foundry sand for soil-related reuse

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Frontiers of Environmental Science & Engineering 2014年第1期8卷 89-98页

作者： Haifeng ZHANG Lu SU Xiangyu LI Jiane ZUO guangli liu Yujue WANG State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Yangtze Delta Region Institute of Tsinghua University Jiaxing 314000 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-sen University Guangzhou 510275 China

The relationship between the chemical con- taminants and soil microbial toxicity of waste foundry sand （WFS） was investigated. Five different types of WFS from typical ferrous, aluminum, and steel foundries in China were examined for total metals, leachable metals, and organic contaminants. The soil microbial toxicity of each WFS was evaluated by measuring the dehydrogenase activity （DHA） of a blended soil and WFS mixture and then comparing it to that of unblended soil. The results show that the five WFSs had very different compositions of metal and organic contaminants and thus exhibited very different levels of soil microbial inhibition when blended with soil. For a given WFS blended with soil in the range of 10wt.%-50wt.% WFS, the DHA decreased almost linearly with increased blending ratio. Furthermore, for a given blending ratio, the WFSs with higher concentrations of metal and organic contaminants exhibited greater microbial toxicity. Correlation analysis shows that the relationship between ecotoxicity and metal and organic contaminants of WFSs can be described by an empirical logarithmic linear model. This model may be used to control WFS blending ratios in soil-related applications based on chemical analysis results to prevent significant inhibition of soil microbial activity.

关键词： waste foundry sand toxicity bioassay soilmicrobial activity waste reuse

A pulsed switching peroxi-coagulation process to control hydroxyl radical production and to enhance 2,4-Dichlorophenoxyacetic acid degradation

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Frontiers of Environmental Science & Engineering 2018年第5期12卷 86-90页

作者： Yaobin Lu Songli He Dantong Wang Siyuan Luo Aiping liu Haiping Luo guangli liu Renduo Zhang Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China Zhaoqing Environmental Monitoring Station Zhaoqing Institute of Environmental ScienceZhaoqing 526040China Nanjing Institute of Environmental Sciences Ministry of Environmental ProtectionNanjing 210042China

The aim of this study was to develop a new pulsed switching peroxi-coagulation system to control hydroxyl radical(∙OH)production and to enhance 2,4-Dichlorophenoxyacetic acid(2,4-D)*** system was constructed with a sacrifice iron anode,a Pt anode,and a gas diffusion *** of H_(2)O_(2) and Fe^(2+)was controlled separately by time delayers with different pulsed switching *** current densities of 5.0 mA/cm^(2)(H_(2)O_(2))and 0.5 mA/cm^(2)(Fe^(2+)),the∙OH production was optimized with the pulsed switching frequency of 1.0 s(H_(2)O_(2)):0.3 s(Fe^(2+))and the ratio of H_(2)O_(2) to Fe^(2+)molar concentrations of *** the optimal condition,2,4-D with an initial concentration of 500 mg/L was completely removed in the system within 240 *** energy consumption for the 2,4-D removal in the system was much lower than that in the electro-Fenton process(686 vs.13610 kWh/kg TOC).The iron consumption in the system was~20 times as low as that in the peroxi-coagulation process(19620 vs.3940400 mg/L)within 240 *** system should be a promising peroxi-coagulation method for organic pollutants removal in wastewater.

关键词： Pulsed switching peroxi-coagulation system Energy consumption Hydroxyl radical production 2,4-Dichlorophenoxyacetic acid

Selective recovery of Cu2+ and Ni2+ from wastewater using bioelectrochemical system

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Frontiers of Environmental Science & Engineering 2015年第3期9卷 522-527页

作者： Haiping LUO Bangyu QIN guangli liu Renduo ZHANG Yabo TANG Yanping HOU School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University

As the bioelectrochemical system, the microbial fuel cell(MFC) and the microbial electrolysis cell(MEC) were developed to selectively recover Cu2+and Ni2+ions from wastewater. The wastewater was treated in the cathode chambers of the system, in which Cu2+and Ni2+ions were removed by using the MFC and the MEC,respectively. At an initial Cu2+concentration of 500 mg$L–1, removal efficiencies of Cu2+increased from 97.0% 1.8% to 99.0% 0.3% with the initial Ni2+concentrations from 250 to 1000 mg$L–1, and maximum power densities increased from 3.1 0.5 to 5.4 0.6 W$m–3. The Ni2+removal mass in the MEC increased from 6.8 0.2 to20.5 1.5 mg with the increase of Ni2+concentrations. At an initial Ni2+concentration of 500 mg$L–1, Cu2+removal efficiencies decreased from 99.1% 0.3% to 74.2% 3.8%with the initial Cu2+concentrations from 250 to 1000 mg$L–1, and maximum power densities increased from3.0 0.1 to 6.3 1.2 W$m–3. Subsequently, the Ni2+removal efficiencies decreased from 96.9% 3.1% to73.3% 5.4%. The results clearly demonstrated the feasibility of selective recovery of Cu2+and Ni2+from the wastewater using the bioelectrochemical system.

关键词： bioelectrochemical system Cu2+ Ni2+ selective recovery