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Journal of Environmental Sciences 2024年第3期137卷 395-406页

作者： Fangzhi Duan yongfeng zhu Yan Liu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Porous materials applied in environmental remediation have received researchers'extensive attention recently,but the related green and convenient preparation method is rarely reported.Here,we recommended a green and convenient strategy for the fabrication of porous material via aqueous foam templates,which was synergistically stabilized by Codonopsis pilosula(CP)and clay minerals of attapulgite(APT).The characterization results revealed that the APT was modified by organic molecules leached from CP and anchored at the air-water interface,which improved the foam stability significantly.The novel porous material of polyacrylamide/Codonopsis pilosula/attapulgite(PAM/CP/APT)templated from the aqueous foam via a polymerization reaction had excellent adsorption capacity for the cationic dyes methyl violet(MV)and methylene blue(MB),and the adsorption capacity can reach 755.85 mg/g and557.64 mg/g,respectively.More importantly,the adsorption capacity of spent adsorbent material was still over 200 mg/g after being recycled five times through a simple carbonization process,and then it was added to the plant pot,the total biomass was increased by about86.42%.This study provided a green and sustainable pathway for the preparation,application and subsequent processing of porous materials.

关键词： Porous material Aqueous foam Atapulgite Adsorption Cationic dyes Sustainable utilization

Evolution and Application of Sealing Ability of Gypsum Caprocks under Temperature-Pressure Coupling:An Example of the ZS5 Well in the Tazhong Area of the Tarim Basin

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 168-184页

作者： LIU Hua ZHAO Shan YANG Xianzhang zhu yongfeng WANG Shen ZHANG Ke National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong 266580China School of Geosciences China University of Petroleum(East China)QingdaoShandong 266580China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdaoShandong 266071China PetroChina Tarim Oil Field Company KorlaXinjiang 841001China

Gypsum caprocks'sealing ability is affected by temperature-pressure coupling.Due to the limitations of experimental conditions,there is still a lack of triaxial stress-strain experiments that simultaneously consider changes in temperature and pressure conditions,which limits the accuracy of the comprehensive evaluation of the brittle plastic evolution and sealing ability of gypsum rocks using temperature pressure coupling.Triaxial stress-strain tests were utilized to investigate the differences in the evolution of the confinement capacity of gypsum rocks under coupled temperaturepressure action and isothermal-variable pressure action on the basis of sample feasibility analysis.According to research,the gypsum rock's peak and residual strengths decrease under simultaneous increases in temperature and pressure over isothermal pressurization experimental conditions,and it becomes more ductile.This reduces the amount of time it takes for the rock to transition from brittle to plastic.When temperature is taken into account,both the brittle–plastic transformation's depth limit and the lithological transformation of gypsum rocks become shallower,and the evolution of gypsum rocks under variable temperature and pressure conditions is more complicated than that under isothermal pressurization.The sealing ability under the temperature-pressure coupling is more in line with the actual geological context when the application results of the Well#ZS5 are compared.This provides a theoretical basis for precisely determining the process of hydrocarbon accumulation and explains why the early hydrocarbon were not well preserved.

关键词： temperature-pressure coupling gypsum caprocks brittle-plastic evolution sealing capacity Tarim Basin

Novel eco-friendly spherical porous adsorbent fabricated from Pickering middle internal phase emulsions for removal of Pb(Ⅱ) and Cd(Ⅱ)

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Journal of Environmental Sciences 2022年第2期34卷 320-330页

作者： Hui Yu yongfeng zhu Aiping Hui Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Spherical porous materials prepared from the emulsion template used in the water treatment have displayed a vast prospect, as the high surface area, abundant porous structure, convenient operation and excellent adsorption performance. But the tedious fabrication process, high consumption of organic solvent and surfactant limited the application widely. Herein, a facile and eco-friendly spherical porous adsorbent(SPA) is fabricated from the green surfactant-free(corn oil)-in-water Pickering medium internal phase emulsions(Pickering MIPEs) via the convenient ion crosslinking procedure. The Pickering MIPEs synergistically stabilized with the semi-coke(SC), which is the natural particle produced from the shale oil distillation, and sodium alginate(SA) has excellent storage and anti-coalescence stability. The as-prepared porous adsorbent possessed the abundant pore structure, which provided favorable conditions for effective mass transfer in adsorption, and could be tuned by varying the SA dosage. The saturation adsorption capacities of Pb(II) and Cd(II) can be achieved with 460.54 and 278.77 mg/g within 45 min at 25 ℃, respectively. Overall, this study supplied a viable and eco-friendly route for fabricating the spherical porous adsorbent with a tunable porous structure for heavy metal ion wastewater.

关键词： Spherical porous adsorbent(SPA) Emulsion template Semi-coke Adsorption Heavy metal ion

Facile fabrication of the porous adsorbent from natural plant Angelica Sinensis stabilized liquid foam for dye removal

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Green Chemical Engineering 2022年第1期3卷 83-91页

作者： Fangzhi Duan yongfeng zhu Hui Yu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Certer of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Porous materials as emerging high-efficiency adsorbents have attracted increasing attention in recent years,due to the high specific surface area,fast adsorption rate,favorable adsorption capacity to heavy metal,dyes,and other pollutants,etc.Among various approaches,the foam template method with the advantage of flexible operation and controllable pores structure is proposed to prepare net type of porous adsorbents with superior adsorption capacity and rapid adsorption rate.In this process,natural plant Angelica Sinensis(AS)was treated with a simple alkalineheat process,and the resultant product was used firstly to prepare foam with high stability,and the positive effect of the cellulose dissociation and the conversion of ligustilide into amphiphilic moleculars on improving the stability of Pickering foam was revealed.The liquid foam can serve as pore-foaming template and precursor of polymerization for synthesizing porous adsorbent by one-step integrated process of free radical polymerization and silane hydrolysis.The porous adsorbent showed the sufficient porous structure and excellent adsorption performance for cationic dye,with maximum adsorption capacities of 386.13 mg g^(-1) and 284.20 mg g^(-1) for methyl violet(MV)and malachite green(MG).In a word,the novel approach can provide an important reference for green synthesis of high stable foam and the superporous material,and the adsorbent showed great application potential in the field of water treatment.

关键词： Adsorbent Angelica Sinensis Pickering foam Adsorption Dye

Fabrication porous adsorbents templated from aqueous foams using astragalus membranaceus and attapulgite as stabilizer for efficient removal of cationic dyes

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Journal of Environmental Sciences 2023年第5期127卷 855-865页

作者： Fangzhi Duan yongfeng zhu Yushen Lu Jiang Xu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The water-based foam stabilized by the natural surfactant applied in the fabrication of porous materials has attracted extensive attention,as the advantages of cleanness,convenience and low cost.Particularly,the development of a green preparation method has became themain research focus and frontier.In thiswork,a green liquid foamwith high stability was prepared by synergistic stabilization of natural plant astragalus membranaceus(AMS)and attapulgite(APT),and then a novel porous material with sufficient hierarchical pore structure was templated from the foam via a simple free radical polymerization of acrylamide(AM).The characterization results revealed that the amphiphilic molecules from AMS adsorbed onto thewater-air interface and formed a protective shell to prevent the bubble breakup,and APT gathered in the plateau border and formed a three-dimensional network structure,which greatly slowed down the drainage rate.The porous material polyacrylamide/astragalus membranaceus/attapulgite(PAM/AMS/APT)showed the excellent adsorption performance for cationic dyes of Methyl Violet(MV)and Methylene Blue(MB)in water,and the maximum adsorption capacity could reach to 709.13 and 703.30 mg/g,respectively.Furthermore,the polymer material enabled to regenerate and cycle via a convenient calcination process,and the adsorption capacitywas still higher than 200 mg/g after five cycles.In short,this research provided a new idea for the green preparation of porous materials and the treatment of water pollution.

关键词： Astragalus membranaceus Pickering foam Porous material Adsorption Biochar

Preparation of porous adsorbent via Pickering emulsion template for water treatment: A review

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Journal of Environmental Sciences 2020年第2期32卷 217-236页

作者： yongfeng zhu Wenbo Wang Hui Yu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Porous materials as emerging potential adsorbents have received much more attention because they are capable of capturing various pollutants with fast adsorption rate, high adsorption capacity, good selectivity and excellent reusability.In order to prepare porous materials with decent porous structure, Pickering emulsion template method has been proved to be one of the most effective technologies to create pore structure.This paper reviewed comprehensively the latest research progress on the preparation of porous materials from various Pickering emulsions and their applications in the decontamination of pollutants(e.g., heavy metal ions, organic pollutants) and in the oil/water separation.It was expected that the summaries and discussions in this review will provide insights into the design and fabrication of new efficient porous adsorbents, and also give us a better understanding of the subject.

关键词： Pickering emulsion Porous material Soft template Water treatment

Research and application of kapok fiber as an absorbing material: A mini review

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Journal of Environmental Sciences 2015年第1期27卷 21-32页

作者： Yian Zheng Jintao Wang yongfeng zhu Aiqin Wang Center of Eco-materials and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

Kapok fiber corresponds to the seed hairs of the kapok tree（Ceiba pentandra）, and is a typical cellulosic fiber with the features of thin cell wall, large lumen, low density and hydrophobic–oleophilic properties. As a type of renewable natural plant fiber, kapok fiber is abundant,biocompatible and biodegradable, and its full exploration and potential application have received increasing attention in both academic and industrial fields. Based on the structure and properties of kapok fiber, this review provides a summary of recent research on kapok fiber including chemical and physical treatments, kapok fiber-based composite materials, and the application of kapok fiber as an absorbent material for oils, metal ions, dyes, and sound,with special attention to its use as an oil-absorbing material, one predominant application of kapok fiber in the coming future.

关键词： Kapok fiber Pretreatment Composite material Absorbing materials

Removal of antibiotics from aqueous solution by using porous adsorbent templated from eco-friendly Pickering aqueous foams

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Journal of Environmental Sciences 2021年第4期33卷 352-362页

作者： Hui Yu yongfeng zhu Aiping Hui Fangfang Yang Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

The aqueous foam template without any solvent and only using the particles stabilizer has attracted much attention for preparation of the porous adsorbents.Herein,a novel porous adsorbent was fabricated via thermal-initiated polymerization of Pickering aqueous foams,which was stabilized by the natural sepiolite(Sep)and pine pollen,and utilized for the removal of antibiotic from aqueous solution.The stabilizing mechanism of Pickering aqueous foam of that the Sep was modified with the leaching substance from pine pollen and arranged orderly around the bubble to form a dense"shell"structure was revealed.The adsorbents possessed the hierarchical porous structure and excellent adsorption performance for antibiotic of chlorotetracycline hydrochloride(CTC)and tetracycline hydrochloride(TC).The equilibrium adsorption capacities of CTC and TC were achieved with 465.59 and 330.59 mg/g within 60 min at 25℃,respectively.The adsorption process obeyed Langmuir model and pseudo-second-order adsorption kinetic model.This work provided eco-friendly approach for fabricate porous adsorbents for wastewater treatment.

关键词： Porous adsorbent Adsorption Antibiotic Pickering aqueous foams Pollen Sepiolite

Fractal detector design and application in maritime target detection

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Journal of Systems Engineering and Electronics 2017年第1期28卷 27-35页

作者： Xinglin Shen Zhiyong Song yongfeng zhu Qiang Fu ATR Key Laboratory National University of Defense TechnologyChangsha 410073China

The fractal properties of sea clutter are proposed and applied to the maritime target detection. Calculation of the measured data shows that, the Hurst exponent of the sea clutter with targets and the sea clutter without targets are different, which enables us to detect low-observable targets within the sea clutter. This paper explains the reason why the Hurst exponent can distinguish the presence or absence of targets in theory and proposes a fractal detector based on the Hurst exponent. Comparing the fractal detector proposed in this paper to the energy detector by the detection results of 140 frames data of the real sea clutter, it is demonstrated that the fractal detection method has a better detection performance. In order to get systemic conclusions, the new sea clutter data with different signal-to-clutter ratios (SCRs) are constructed in the way that add the sea clutter data with targets to the pure sea clutter data. The results show that the fractal detection method has a better performance than the statistical method on detection of maritime targets, especially maritime weak targets with low SCR. ? 1990-2011 Beijing Institute of Aerospace Information.

关键词： Fractals Radar clutter Target tracking

Geological Evolution and Huge Ore-Forming Belts in the Core Part of the Central Asian Metallogenic Region

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Journal of Earth Science 2016年第3期27卷 491-506页

作者： yongfeng zhu Fang An Wangyi Feng Huichao Zhang The Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking University Department of Geology Northwest University

The multi-stage geological evolution and extensive continental deformations during the course of its history make the Central Asian metallogenic region（CAMR） a unique and complicated large-scale metal domain. New geological observations and precise age-data allow an improved reconstruction of the geological evolution of the CAMR. This paper summarizes the Paleozoic orogenic evolution and related ore formation in the core part of the CAMR based on the geological data published both during the Soviet period and the last decades. Four ore-formation provinces（Altay, BalkhashJunggar, Chu-Yili-Tianshan, and Southwest Tianshan） could be classified. The Balkhash-Junggar and Chu-Yili-Tianshan provinces are the major topics of this paper. The Balkhash-Junggar province consists of 4 huge ore-forming belts（Zharma-Saur, Tarbahtay-Xiemistay, Aktogay-Baerluke, Balkhashwestern Junggar） with 11 large ore-college areas. The Chu-Yili-Tianshan province consists of 4 huge ore-forming belts（Alatau-Sairimu, Chu-Yili-Bolehuole, Issyk-Awulale, Kazharman-Nalaty） with 22 large ore-college areas. Formation of large ore-college area corresponds to a specific stage of continental crust growth. Comparison of geology and ore deposits in the CAMR provides rich information for future exploration and understanding of ore-forming processes. The Paleo-Junggar Ocean closed at Early Devonian in the Balkhash-western Junggar ore-forming belt. Afterwards, widespread volcanic- sedimentary rocks formed at extensional stage due to delamination of the thick lower crust formed during previous accretionary processes. Felsic magma intrusion caused formation of porphyry Cu-Au deposit at ~310 Ma and related hydrothermal gold deposits about 10 Ma later. For example, in the Hatu-Baobei-Sartohay Au-Cr ore-college area in the Balkhash-western Junggar ore-forming belt, small granitic to diorite plutons and various dykes（312–277 Ma） and large granite bodies（~300 Ma） intruded into the Devonian to Early Carboniferous volcano-sedimentary basin. These magmatic activities a

关键词： Central Asian Paleozoic ore Altay Balkhash-Junggar Chu-Yili-Tianshan Southwest Tianshan