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Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals： A Review

Pedosphere 2017年第2期27卷 193-204页

作者： xu Yi LIANG xuefeng xu yingming QIN xu HUANG Qingqing WANG Lin SUN Yuebing College of Resources and Environment Hunan Agricultural University Changsha 410128 (China) Innovation Team of Remediation of Heavy Metal-Contaminated Farmlands Agro-Environmental Protection Institute Ministry of Agriculture Tianjin 300191 (China) Key Laboratory of Original Environmental Quality of MOA/ZTianjin Key Laboratory of Agro-Environment and Agro-Product Safety Tianjin 300191 (China)

Heavy metal contamination of agricultural soils poses risks and hazards to humans. The remediation of heavy metal-polluted soils has become a hot topic in environmental science and engineering. In this review, the application of clay minerals for the remediation of heavy metal-polluted agricultural soils is summarized, in terms of their remediation effects and mechanisms, influencing factors, and future focus. Typical clay minerals, natural sepiolite, palygorskite, and bentonite, have been widely utilized for the in-situ immobilization of heavy metals in soils, especially Cd-polluted paddy soils and wastewater-irrigated farmland soils. Clay minerals are able to increase soil pH, decrease the chemical-extractable fractions and bioavailability of heavy metals in soils, and reduce the heavy metal contents in edible parts of plants. The immobilization effects have been confirmed in field-scale demonstrations and pot trials. Clay minerals can improve the environmental quality of soils and alleviate the hazards of heavy metals to plants. As main factors affecting the immobilization effects, the pH and water condition of soils have drawn academic attention. The remediation mechanisms mainly include liming, precipitation, and sorption effects. However, the molecular mechanisms of microscopic immobilization are unclear. F^ture studies should focus on the long-term stability and improvement of clay minerals in order to obtain a better remediation effect.

关键词： bentonite bioavailability immobilization liming effect palygorskite sepiolite soil pH

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Effects of sepiolite on stabilization remediation of heavy metal-contaminated soil and its ecological evaluation

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Frontiers of Environmental Science & Engineering 2016年第1期10卷 85-92页

作者： Yuebing SUN Dan ZHAO yingming xu Lin WANG xuefeng LIANG Yue SHEN Key Laboratory of Original Environmental Quality Ministry of Agriculture/Tianjin Key Laboratory of Agro-Environment and Ago-Product Safety Institute of Agro-Environmental Protection Ministry of Agriculture Tianjin 300191 China College of Resources and Environmental Sciences Henan Agricultural University Zhengzhou 450002 China

Stabilization in the remediation of heavy metal contaminated soils has been gaining prominence because of its cost-effectiveness and rapid implementation. In this study, microbial properties such as microbial community and enzyme activities, chemical properties such as soil pH and metal fraction, and heavy metal accumulation in spinach （Spinacia oleracea） were considered in assessing stabilization remediation effectiveness using sepiolite. Results showed that soil pH values increased with rising sepiolite concentration. Sequential extraction results indi- cated that the addition of sepiolite converted significant amounts of exchangeable fraction of Cd and Pb into residual form. Treatments of sepiolite were observed to reduce Cd and Pb translocation from the soil to the roots and shoots of spinach. Concentrations of Cd and Pb exhibited 12.6%-51.0% and 11.5%-46.0% reduction for the roots, respectively, and 0.9%-46.2% and 43.0%- 65.8% reduction for the shoots, respectively, compared with the control group. Increase in fungi and actinomycete counts, as well as in catalase activities, indicated that soil metabolic recovery occurred after sepiolite treatments.

关键词： stabilization remediation heavy metals sepio-lite soil quality spinach (Spinacia oleracea)

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Spray synthesis of rapid recovery Zno/polyaniline film ammonia sensor at room temperature

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Frontiers of Materials Science 2022年第4期16卷 81-91页

作者： Yingze BAI Xin DONG Chuanyu GUO yingming xu Bin WANG Xiaoli CHENG Key Laboratory of Functional Inorganic Material Chemistry School of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China State Key Laboratory of Optoelectronic Materials and Technologies Key Laboratory for Polymeric Composite and Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

As an excellent room temperature sensing material,polyaniline(PANI)needs to be further investigated in the field of high sensitivity and sustainable gas sensors due to its long recovery time and difficulty to complete *** ZnO/PANI film with p-n heterogeneous energy levels have successfully prepared by spraying Zno nanorod synthesized by hydrothermal method on the PANI film rapidly synthesized at the gas-liquid *** presence of p-n heterogeneous energy levels enables the ZnO/PANI film to detect 0.1-100 ppm(1 ppm=10^(-6))NH_(3)at room temperature with the response value to 100 ppm NH_(3)doubled(12.96)and the recovery time shortened to 1/5(31.2s).The ability of high response and fast recovery makes the ZnO/PANI filmto be able to detect NH_(3)at room temperature *** provides a new idea for PANI to prepare sustainable room temperature sensor and promotes the development of room temperature sensor in public safety.

关键词： rapid recovery ZnO/polyaniline film ammonia sensor

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In situ stabilization remediation of cadmium contaminated soils of wastewater irrigation region using sepiolite

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Journal of Environmental Sciences 2012年第10期24卷 1799-1805页

作者： Yuebing Sun Guohong Sun yingming xu Lin Wang Dasong Lin xuefeng Liang Xin Shi Key Laboratory of Original Environmental Quality Safety Ministry of AgricultureTianjin 300191China Tianjin Key Laboratory of Asro-environment and Agro-product Safety Institute of Agro-Environmental ProtectionMinistry of Agriculture7ianjin 300191China Department of Basic Science lianjin Agricultural UniversityTianjin 300384China College of Environment and Resources Jilin UniversityChangchun 130012China

The effects of immobilization remediation of Cd-contaminated soils using sepiolite on soil pH, enzyme activities and microbial communities, TCLP-Cd （toxicity characteristic leaching procedure-Cd） concentration, and spinach （Spinacia oleracea） growth and Cd uptake and accumulation were investigated. Results showed that the addition of sepiolite could increase soil pH, while the TCLP-Cd concentration in soil was decreased with increasing sepiolite. The changes of soil enzyme activities and bacteria number indicated that a certain metabolic recovery occurred after the sepiolite treatments, and spinach shoot biomass increased by 58.5%-65.5% in comparison with the control group when the concentration of sepiolite was ~ 10 g/kg. However, the Cd concentrations in the shoots and roots of spinach decreased with an increase in the rate of sepiolite, experiencing 38.4%-59.1% and 12.6%--43.6% reduction, respectively, in contrast to the control. The results indicated that sepiolite has the potential for success on a field scale in reducing Cd entry into the food chain.

关键词： Cd-contaminated soil immobilization remediation sepiolite soil quality

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A Facile Synthesis of Hierarchically Porous TiO2 Microspheres with Carbonaceous Species for Visible-light Photocatalysis

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Journal of Materials Science & Technology 2017年第1期33卷 39-46页

作者： Weigang Liu yingming xu Wei Zhou Xianfa Zhang Xiaoli Cheng Hui Zhao Shan Gao Lihua Huo Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080 China

Hierarchically porous anatase Ti02 microspheres composited with carbonaceous species （TCS） have been successfully fabricated by a one-step template-free solvothermal method, combined with subsequent low temperature dried process. In this configuration, the TCS microspheres are constructed by the intercon- nected porous nanosheets, which are further assembled with abundant nanoparticles and carbonaceous species. Such composite microspheres possess a large specific surface area of 337 m2 g-l, uniform mesopores of 3.37 nm and high total pore volumes of 0.275 cm3 g-1. The materials exhibit the enhanced photocatalytic properties and stability for degradation of rhodamine B （RhB） under visible-light irradiation. The enhanced photocatalytic degradation performance may be ascribed to their abundant porous structure, large specific surface area and the unique assist-function of the carbonaceous species.

关键词： TiO2 Porous materials Microspheres Nauostructure Photocatalytic properties

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CHINA RAILWAY EXPRESS TO EUROPE: IMPLICATIONS TO CHINA-EU ECONOMIC GEOGRAPHY AND PROSPECTS

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Contemporary World 2020年第3期 37-40页

作者： xu yingming LI XIN Chinese Academy of International Trade and Economic Cooperation MOFCOM School of Marxism Tianjin Normal University

As an important project for closer infrastructure and trade connectivity between China and countries along the Belt and Road,the China Railway Express (CRE) has become a highlight of Belt and Road *** its debut nine years ago,its number of destinations and services have grown *** the end of 2019,it had connected 62 Chinese cities with over 110 cities in Eurasia.

关键词： closer services EXPRESS

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Single-shot ultrafast multiplexed coherent diffraction imaging

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Photonics Research 2022年第8期10卷 1937-1946页

作者： yingming xu XINGCHEN PAN MINGYING SUN WENFENG LIU CHENG LIU JIANQIANG ZHU Key Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China National Laboratory on High Power Laser and Physics China Academy of Engineering PhysicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Classic interferometry was commonly adopted to realize ultrafast phase imaging using pulsed lasers;however, the reference beam required makes the optical structure of the imaging system very complex, and high temporal resolution was reached by sacrificing spatial resolution. This study presents a type of single-shot ultrafast multiplexed coherent diffraction imaging technique to realize ultrafast phase imaging with both high spatial and temporal resolutions using a simple optical setup, and temporal resolution of nanosecond to femtosecond scale can be realized using lasers of different pulse durations. This technique applies a multiplexed algorithm to avoid the data division in space domain or frequency domain and greatly improves the spatial resolution. The advantages of this proposed technique on both the simple optical structure and high image quality were demonstrated by imaging the generation and evaluating the laser-induced damage and accompanying phenomenon of laser filament and shock wave at a spatial resolution better than 6.96 μm and a temporal resolution better than 10 ns.

关键词： coherent resolution diffraction

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Sorption of Cu2+ on mercapto functionalized palygorskite:comprehensive approaches

Sorption of Cu2+ on mercapto functionalized palygorskite:com...

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中国化学会第29届学术年会

作者： Jun Han xuefeng Liang yingming xu Yuanjian xu Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Original Environmental Quality of MOA Agro-Environmental Protection Institute of Ministry of Agriculture

Herein,for the first time,natural palygorskite powders modified with sulfhydryl groups by nanotexturization method have been systematically studied for further adsorbent selection of soil *** palygorskite（PAL） and mercapto functionalized palygorskite（MPAL） samples as adsorbents for copper cations（Cu（II）） from aqueous solution（before and after sorption） were characterized through XRD,FT-IR,SEM-EDS,EPR Spectra of Cu（Ⅱ） and *** sorption behaviors including thermodynamic and kinetic parameters,effect factors and mechanisms of Cu2+ on MPAL were *** parameters on reactions between PAL（MPAL） and copper solution were checked by *** isotherm was proved to describe the sorption data better than other isotherms and pseudo second order kinetic model could fit the sorption kinetic processes *** on hard and soft acids and bases theory and the results analyzed from XPS,the sorption mechanisms could be explained as primarily chemical adsorption and secondary physical adsorption.

关键词： palygorskite mercapto functionalization sorption copper soil remediation

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高质量发展背景下中欧班列发展现状、挑战与对策

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国际贸易 2020年第5期 28-34页

作者：许英明商务部国际贸易经济合作研究院

伴随“一带一路”建设从谋篇布局的“大写意”阶段迈向精耕细作的“工笔画”新时代,中欧班列作为“一带一路”建设的重要载体,也从冲数量向提质量转变。而中欧班列在开行数量和规模急剧增长的背后,也面临着一些现实挑战:补贴退坡任务重... 详细信息

伴随“一带一路”建设从谋篇布局的“大写意”阶段迈向精耕细作的“工笔画”新时代,中欧班列作为“一带一路”建设的重要载体,也从冲数量向提质量转变。而中欧班列在开行数量和规模急剧增长的背后,也面临着一些现实挑战:补贴退坡任务重,运营环境待优化;竞相低价揽货,班列服务质量难以保证;口岸能力不足,班列运输时效性成难题;系统信息化滞后,班列操作效率有待提升;评价体系较为粗放,高质量发展引领不足;受地缘政治格局影响,部分回程商品无法运输。在由追求数量增长向高质量发展迈进的新阶段,中欧班列发展需要在严格落实补贴退坡政策的基础上,合理控制规模,促进开通城市良性竞争;优化线路布局,提高中欧班列运输时效;加快信息化建设,提升班列服务质量;完善评价体系,更加突出经贸贡献指标;加强国际协调,增加回程商品运输量。

关键词：中欧班列贸易促进高质量发展

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水安全理念约束下的城镇化转型路径探讨

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工业技术经济 2013年第4期32卷 121-124页

作者：许英明北京大学北京100871

城镇化进程的加快为城市带来繁荣的同时,也给城市水安全带来了前所未有的压力。城镇化发展的不同阶段,水安全问题的表现形式和性质也有所差异,需根据其对城镇化发展的约束条件和城镇化发展阶段的特点,寻求解决路径。面对水资源约束趋紧... 详细信息

城镇化进程的加快为城市带来繁荣的同时,也给城市水安全带来了前所未有的压力。城镇化发展的不同阶段,水安全问题的表现形式和性质也有所差异,需根据其对城镇化发展的约束条件和城镇化发展阶段的特点,寻求解决路径。面对水资源约束趋紧,水资源短缺、水污染严峻、内涝频发等水安全问题已对我国城市可持续发展形成瓶颈性制约的严峻形势,本文从水资源这一硬约束条件出发,分析城镇化与水资源的关系,指出必须改变传统的高投入、高消耗、高污染方式来推进的城镇化进程,向节约型城市、集约型城市、低碳生态型城市转型发展。

关键词：水安全问题快速城镇化约束效应城镇化转型

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