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Environmental Science and Ecotechnology 2022年第2期10卷 38-44页

作者： Chuan Yu Jie He Shenyu Lan Wanqian Guo Mingshan Zhu Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou511443PR China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin150090PR China

The efficient activation and utilization of peroxymonosulfate(PMS)in PMS-based advanced oxidation processes is a high-priority target for the removal of organic contaminants.This work introduces a water vortex-driven piezoelectric effect from few-odd-layered MoS_(2)into the PMS activation to remove benzotriazole(BTR)and other organic contaminants from the water.Approximately 91.1%of BTR can be removed by the MoS_(2)piezo-activated PMS process with a reaction rate constant of 0.428 min1,which is 2.09 times faster than the sum of the individual MoS_(2),water vortex,and piezocatalysis rates.Meanwhile,the PMS utilization efficiency reached 0.0147 in the water vortex-driven piezo-activation system,which is 3.97 times that of the sum from the vortex/PMS and MoS_(2)/PMS systems.These results demonstrate that the presence of MoS_(2)under a water vortex can trigger a piezoelectric potential and generate abundant free electrons to activate PMS to generate various active species for degradation of organic contaminants.

关键词： Water vortex-driven Peroxymonosulfate utilization Piezoelectric activation organic contaminants Few-odd-layered MoS2

Regulating the crystal phase of bismuth-based semiconductors for promoted photocatalytic performance

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Science China Chemistry 2024年第6期67卷 1839-1864页

作者： Zhaohui Wu Mei-Chi Chong Shiying Zhang Junshan Li Yongfa Zhu Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China Department of Chemistry Tsinghua UniversityBeijing100084China Institute for Advanced Study Chengdu UniversityChengdu610106China

Numerous bismuth-based semiconductors(BBSs)with sophisticated and desirable structures used as photocatalysts for efficient photocatalytic degradation of water organic contaminants have attracted considerable attention.However,regulating the crystal phases and phase transition of BBSs for promoted photocatalytic performance is ignored.Herein,the unique crystal structure and band structure features of each typical BBSs,and the vital roles on phase controlling of each phase were systematically presented based on the classification of BBSs.Notably,the critical factors for the phase transition of BBSs and intrinsic driving forces endowed by phases of BBSs for enhanced photocatalytic performance of organic contaminants removal were also elucidated.This review will provide systematical guidelines and horizons for regulating the crystal phase and phase transition of BBSs,promoting photocatalytic degradation and mineralization of organic contaminants.

关键词： bismuth-based semiconductors phase regulation photocatalytic performances organic contaminants

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic environment

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 19-40页

作者： Xinyi Liu Caichao Wan Xianjun Li Song Wei Luyu Zhang Wenyan Tian Ken-Tye Yong Yiqiang Wu Jian Li College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China Material Science and Engineering College Northeast Forestry UniversityHarbin150040China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore639798Singapore Yihua Lifestyle Technology Co. LtdHuaidong Industrial ZoneLianxia TownChenghai DistrictShantou515834China Caichao Wan

Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years,because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these materials.Herein,we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic pollutants.This review begins with a brief introduction of the development of photocatalysts and hierarchical structure of wood.The review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants(such as 1D fiber,2D films and 3D porous gels)using advanced nanotechnology including sol-gel method,hydrothermal method,magnetron sputtering method,dipping method and so on.Next,we highlight typical approaches that improve the photocatalytic property,including metal element doping,morphology control and semiconductor coupling.Also,the structure-activity relationship of photocatalysts is emphasized.Finally,a brief summary and prospect of wood-derived photocatalysts is provided.

关键词： Wood Nanocatalysts Photodegradation organic contaminants Composites

Efficient elimination of organic contaminants with novel and stable zeolite@MOF layer adsorbents

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Particuology 2021年第5期19卷 74-84页

作者： Jiafei Wu Yingzhi Zhu Kunpeng Xue Yan Lu Jiahao Hu Wei Dai Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life ScienceZhejiang Normal UniversityJinhua 321004China Welch Materials(Zhejiang) Inc.Jinhua 321000China

Many metal-organic frameworks(MOFs)trapped in water exhibit instability and small-particle agglomeration issues,which unquestionably constrain their potential applications,such as the capture of organic contaminants(OCs).In this study,four types of micron-sized MOFs(Zn/Cu-BTC,MOF-5,ZIF-8,and UiO-66)were grown within a zeolite-13X support to form millimeter-sized zeolite-13X@MOF composites for the elimination of benzothiophene,methyl orange,and tetracycline from the liquid phase by dynamic adsorption in a column.We observed that the 13X@Zn/Cu-BTC exhibited extraordinarily high OC capture capacities as a result of the Zn^(2+) and Cu^(2+) combinative effects of the acid-base interaction.Remarkably,the 13X@UiO-66 preserved its structural integrity when immersed in water for 15 days,in contact with boiling water for 12 h,and in both strong acidic and basic aqueous media.Moreover,the OC capture abilities of the 13X@UiO-66 only underwent a slight change after the fifth round.This work provides new method for the design of desirable millimeter-sized zeolite@MOFs,thereby advancing their practical application for OC capture.

关键词： Zeolite MOFs Adsorption organic contaminants

Biochar-based materials and their applications in removal of organic contaminants from wastewater:state-of-the-art review

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Biochar 2019年第1期1卷 45-73页

作者： Qiang Huang Shuang Song Zhe Chen Baowei Hu Jianrong Chen Xiangke Wang MOE Key Lab of Resources and Environmental System Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206People’s Republic of China School of Life Science Shaoxing UniversityHuancheng West Road 508Shaoxing 312000People’s Republic of China College of Geography and Environmental Science Zhejiang Normal UniversityJinhua 321004People’s Republic of China

As a class of famous carbon materials,biochars(BCs)and their derivative materials with excellent physicochemical properties and diversified functionalities present great potential in wastewater treatment fields.This review focuses on the latest development in reported biochar-based materials as superior adsorbents or catalysts for removing harmful organic contaminants from wastewater.The construction and properties of biochar-based materials are briefly introduced at the beginning.As one of the major factors affecting the properties of BCs,the wide diversity of feedstocks,such as agricultural and forest residues,industrial by-products as well as municipal wastes,endows BCs different chemical compositions and structures.Woody and herbaceous BCs usually have higher carbon contents,larger surface areas and strong aromaticity,which is in favor of the organic contaminant removal.Driven by the desire of more cost-effective materials,several types of biochar-based hybrid materials,such as magnetic BC composites(MBC),nanometal/nanometallic oxides/hydroxide BC composites and layered nanomaterial-coated BCs,as well as physically/chemically activated BCs,have also been developed.With the help of foreign materials,these types of hybrid BCs have excellent capacities to remove a wide range of organic contaminants,including organic dyestuff,phenols and chemical intermediates,as well as pharmaceutically active compounds,from aquatic solutions.Depending on the different types of biochar-based materials,organic contaminants can be removed by different mechanisms,such as physical adsorption,electrostatic interaction,π-πinteraction and Fenton process,as well as photocatalytic degradation.In summary,the low cost,tunable surface chemistry and excellent physical-chemical properties of BCs allow it to be a potential material in organic contaminant removal.The combination of BCs with foreign materials endows BCs more functionalities and broader development opportunities.Considering the urgent demand of practical wastewater treatment,we h

关键词： Biochar-based materials Water purification organic contaminants Catalytic degradation Adsorption

Oxygen-vacancy-rich phenanthroline/TiO_(2) nanocomposites: An integrated adsorption, detection and photocatalytic material for complex pollutants remediation

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Chinese Chemical Letters 2022年第2期33卷 907-911页

作者： Pinghua Chen Huitao Zheng Hualin Jiang Jun Liu Xinman Tu Weibo Zhang Bailey Phillips Lei Fang Jian-Ping Zou Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China Department of Applied Chemistry College of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063China Department of Chemistry Texas A&M UniversityCollege StationTexas 77843United States School of Resources Environmental and Chemical EngineeringNanchang UniversityNanchang 330031China

To address the challenge of treating complex pollutants containing heavy metals and organic compounds,a phenanthroline/TiO_(2)nanocomposite with rich oxygen vacancy defects was synthesized to integrate the functions of pollutant detection, adsorption, and photocatalytic degradation. The results showed that the nanocomposite could adsorb Cr^(3+)and the process could be transduced into a colorimetric signal for qualitative and quantitative detection. The adsorbed heavy metal also exhibited a synergistically enhanced photocatalytic degradation of a model organic pollutant under visible light. The simultaneous adsorption, detection, and photocatalysis could reduce the multifarious operations and high cost of traditional environmental remediation methods, indicating a strong application potential for the nanocomposite.

关键词： Heavy metals organic contaminants Adsorption Detection Photocatalytic degradation Oxygen vacancy

Environmental Properties of Minerals and contaminants Purified by the Mineralogical Method

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Acta Geologica Sinica(English Edition) 2004年第1期78卷 191-202页

作者： LUAnhuai SchoolofEarthandSpaceSciences PekingUniversityBeijing100871

The investigation of the environmental properties of minerals, i.e., environmental mineralogy, is a branch of science dealing with interactions between natural minerals and spheres of the Earth surface as well as a reflection of global change, prevention of ecological destruction, participation in biomineralogy, and remediation of environmental pollution. Pollutant treatment by natural minerals is based on the natural law and reflects natural self-purification functions in the inorganic world, similar to that of the organic world - a biological treatment. A series of case studies related to natural self-purification, which were mostly completed by our group, are discussed in this paper. In natural cryptomelane there is a larger pseudotetragonal tunnel than that formed by [MnO6] octahedral double chains, with an aperture of 0.462-0.466 nm2, filled with K cations. Cryptomelane might be a real naturally-occurring mineral of the active octahedral molecular sieve (OMS-2). CrⅥ-bearing wastewater can be treated by natural pyrrhotite, which is used as a reductant to reduce CrⅥ and as a precipitant to precipitate CrⅢ simultaneously. Batch experiments were conducted using the CTMAB-Montmorillonite as an adsorbent for aromatic contaminants (phenol, aniline, benzene, toluene and xylenes), which are detected frequently in the leaching water from municipal waste deposits around China. The CTMAB modification has proved very effective to enhance the adsorption capacity of the sorbent. Expansion of vermiculite develops loose interior structures, such as pores or cracks, inside briquettes, and thus brings enough oxygen for combustion and the sulfation reaction. Effective combustion of the original carbon reduces the amount of dust in the fly ash.

关键词： environmental mineralogy cryptomelane natural octahedral molecular sieve pyrrhotite CrV1-bearing wastewater organoclay organic contaminants vermiculite desulfurization method of disposal contaminants

The mechanism study of low-pressure air plasma cleaning on large-aperture optical surface unraveled by experiment and reactive molecular dynamics simulation

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Plasma Science and Technology 2022年第6期24卷 77-87页

作者：李玉海白清顺关宇珩刘昊张鹏巴特勒·别克沈荣琦卢礼华袁晓东苗心向韩伟姚彩珍 School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150000People's Republic of China Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900People's Republic of China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401135People's Republic of China

Low-pressure air plasma cleaning is an effective method for removing organic contaminants on large-aperture optical components in situ in the inertial confinement fusion facility.Chemical reactions play a significant role in plasma cleaning,which is a complex process involving abundant bond cleavage and species generation.In this work,experiments and reactive molecular dynamics simulations were carried out to unravel the reaction mechanism between the benchmark organic contaminants of dibutyl phthalate and air plasma.The optical emission spectroscopy was used to study the overall evolution behaviors of excited molecular species and radical signals from air plasma as a reference to simulations.Detailed reaction pathways were revealed and characterized,and specific intermediate radicals and products were analyzed during experiments and simulation.The reactive species in the air plasma,such as O,HO_(2)and O_(3)radicals,played a crucial role in cleaving organic molecular structures.Together,our findings provide an atomic-level understanding of complex reaction processes of low-pressure air plasma cleaning mechanisms and are essential for its application in industrial plasma cleaning.

关键词： organic contaminants large-aperture optical components low-pressure air plasma plasma cleaning reactive species reactive molecular dynamics

Human Health Risk Assessment Model of organic Pollution in Groundwater:Shijiazhuang Industrial Zone

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Acta Geologica Sinica(English Edition) 2011年第6期85卷 1508-1517页

作者： YANG Mei FEI Yuhong JU Yiwen LI Huaqi Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences College of Earth Science Graduate University of Chinese Academy Sciences Beijing 100049 China The Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences （CAGS） Shijiazhuang 050061 China Institute of Geology Chinese Academy of Geological Sciences Beijing 10003 7 China

In this study, a risk-based management model is developed and applied to an industrial zone. The models proposed by the United States Environmental Protection Agency and Han Bing have been improved by adding a residual ratio of volatile organic compounds （VOC） after boiling and deleting the related parameters in half-life. Using this improved model, an integrated process was used to assess human health risk level in the study area. Compared with water quality analysis, the results highlight the importance of applying an integrated approach for decision making on risk levels and water protection. The results of this study demonstrated that：（1） Compared with these permissible level standards in China （GB 3838-2002） and National Primary Drinking Water Regulations of the United States, the residents＇ daily life had not been affected by the groundwater in this area （except for relative bad water quality of HB3-4 and HB3-6）; （2） The typical detected organic contaminants of all groundwater samples were chloroform, carbon tetrachloride, trichloroethylene and tetrachloroethene, and the pollution sources were mainly industrial sources by preliminary investigations; （3） As for groundwater, the non-carcinogenic risk values of all samples do not exceed the permissible level of 1.0 and the carcinogenic risk values are relatively lower than the permissible level of 1.00E-06 to 1.00E-04; （4） Drinking water pathway of trichloroethylene and tetrachloroethylene mainly contribute to increasing the health risk of residents＇ in study areas; （5） In terms of non-carcinogenic risk and carcinogenic risk, the health risk order for drinking water pathway and dermal contact pathway was： drinking water pathway 〉 dermal contact pathway.

关键词： groundwater pollution organic contaminants residual rate assessment model human health risk

Environmental behavior of engineered biochars and their aging processes in soil

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Biochar 2019年第4期1卷 339-351页

作者： Wenyan Duan Patryk Oleszczuk Bo Pan Baoshan Xing Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500People’s Republic of China Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control Kunming University of Science and TechnologyKunming 650500People’s Republic of China Department of Environmental Chemistry University of Maria Skłodowska-Curiepl.M.Curie-Sklodowskiej 320-031 LublinPoland Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

In recent years,due to the broad application of biochars,the preparation,environmental behavior and aging processes of biochars have attracted wide attention globally,especially the modification of biochars.However,most of the studies only consider the improvement of biochar properties right after the modification,but neglect a complete evaluation of the long-term stability and eco-toxicity of these newly developed materials after entering the environment.With the development and utilization of biochars,engineered biochars(EngBCs)will soon enter the market,but its environmental risk still remains unclear.The literature does not provide adequate information on how aging of EngBCs will affect their properties,and indirectly impact the properties of soils(cycle of elements and organic matter).Therefore,this review paper summarizes the aging process and environmental risk of biochars,aiming at better understanding the interactions between EngBCs and soil components or pollutants.More importantly,this review is to point out the contradictory speculations of environmental behavior of EngBCs studied at the present stage.Due to the modification,the EngBCs stability may be significantly reduced.However,the formation of functional group on EngBCs will enhance their interaction with soil minerals to form biochars-mineral complex,and thus EngBCs could be protected.The impacts of EngBCs after entering the environment are also ambiguous.Therefore,understanding EngBCs environmental behavior is critical,which is helpful to reduce the potential risk and to produce EngBCs following the rule of sustainable development and safety to the environment.

关键词： Biochar modification Stability Toxicity Soil components organic contaminants