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Removal performance,mechanisms,and influencing factors of biochar for air pollutants:a critical review

Biochar 2022年第1期4卷 678-701页

作者： Zhipeng Zhao Bing Wang Benny K.G.Theng Xinqing Lee Xueyang Zhang Miao Chen Peng Xu College of Resource and Environmental Engineering Guizhou UniversityGuiyang 550025China Key Laboratory of Karst Georesources and Environment Ministry of EducationGuiyang 550025China Manaaki Whenua-Landcare Research Palmerston NorthNew Zealand State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse School of Environmental EngineeringXuzhou University of TechnologyXuzhou 221018China

The emission of air pollutants from various industries is a major contributor to environmental *** removal of these pollutants before they are discharged into the environment has become an important means of controlling air *** has attracted increasing attention because of its low cost,high porosity,large specific surface area,abundant surface functional groups,and high removal *** physicochemical properties of biochar are greatly affected by feedstock types,preparation,and modification *** this reason,the capacity and propensity of biochar for removing air pollutants are rather *** understand the existing research status and grasp the latest research progress,a systematic review on the removal of different air pollutants by biochar is highly *** on the recent research,this paper systematically analyzes and summarizes the preparation and modification methods of biochar commonly used for the removal of six air pollutants(SO_(2),H_(2)S,CO_(2),Hg0,VOCs,and NH_(3)),as well as the removal performance and ***,the potential influencing factors(preparation parameters,physicochemical characteristics of biochar,and removal conditions)are ***,the regeneration of biochar,suggestions,and future perspectives are proposed.

关键词： Biochar Modification Air pollutants Removal performance Removal mechanisms Influencing factors

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Comprehensive understanding of guest compound intercalated layered double hydroxides: Design and applications in removal of potentially toxic elements

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Critical Reviews in Environmental Science and Technology 2023年第4期53卷 457-482页

作者： Cui, Shihao Peng, Yutao Yang, Xiao Gao, Xing Guan, Chung-Yu Fan, Beibei Zhou, Xue Chen, Qing Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing China School of Agriculture Sun Yat-sen University Guangdong Shenzhen China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China State Key Laboratory for Pollution Control and Reuse School of Environmental Science and Engineering Tongji University Shanghai China Department of Environmental Engineering National I-Lan University Yilan Taiwan

Layered double hydroxides (LDHs) and LDHs-derived materials are emerging as potential engineered adsorbents for the protection of water environment. Particularly, LDHs intercalated with different guest compounds (GC-LDHs), which differ from traditional interlayer anions (such as Cl−, SO42−, NO3−, CO32−, and PO43−), are widely reported by recent studies showing their promising multifunctional roles in water purification. Herein, this review systematically presents the synthesis methods and characterization techniques of GC-LDHs and their application as adsorbents in removing potentially toxic elements (PTEs) from the aqueous phase. This review also elaborates on the important roles of complexation, chelation, precipitation, isomorphic substitution, and ion exchange in the process of PTE removal by GC-LDHs. Among them, compared with PTE cations, ion exchange is an additional mechanism for the removal of PTE oxyanions by GC-LDHs. Furthermore, the influence of pH, ionic strength, temperature, physiochemical properties of original LDHs and guest compounds on the GC-LDHs adsorption performance are also summarized. Finally, the development trends and future challenges related to GC-LDHs are proposed. © 2022 Taylor & Francis Group, LLC.

关键词： Ion exchange

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Cadmium immobilization by mercapto-palygorskite in alkaline soil: Impacts on soil microbial communities and wheat rhizosphere metabolism

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Science of the Total Environment 2024年 955卷 176734页

作者： Ma, Wenyan Ge, Chenghao Sun, Yuebing Wang, Min Zhou, Dongmei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Agro-Environmental Protection Institute Ministry of Agriculture and Rural Affairs Tianjin300191 China

Weakly alkaline cadmium (Cd) contaminated soil in China has aroused great concern regarding its impact on food security and human health. Mercapto-modified palygorskite (MP) has exhibited good potential to minimize Cd accumulation in wheat, it is imperative to understand the underlying mechanisms within the soil-wheat-microbial system for sustainable development of agrochemicals. This study evaluated the effects of various MP dosages on soil Cd bioavailability, rhizosphere metabolomics, microbial community structure and wheat growth. The results indicated that MP (0.05–0.2 %) application significantly reduced Cd accumulation in wheat grains by 59.0–83.2 % (p © 2024 Elsevier B.V.

关键词： Agricultural food safety Cadmium Mercapto-palygorskite Metabolism Microbial community

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Prediction of as and Cd Dissolution in Various Soils Under Flooding Condition

SSRN

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SSRN 2024年

作者： Ge, Jingwen Wu, Song Wu, Haotian Lin, Jianyu Cai, Yijun Zhou, Dongmei Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China Institute of Soil Science Chinese Academy of Sciences Nanjing China

Although the mobility of arsenic (As) and cadmium (Cd) in soils during the flooding-drainage process has been intensively studied, prediction their dissolution among various soils still remains a challenge. After comprehensively monitoring multiple parameters related to As and Cd dissolution in 8 soils for a 60-day anaerobic incubation, the redundancy analysis (RDA) and structural equation model (SEM) were employed to identify the key factors and influencing pathways controlling the dynamic release of As and Cd. Results showed that pH alone explained 90.5% Cd dissolution, while the dissolved-Fe(II) and 5M-HCl extractable Fe(II) jointly only explained 50.6% As dissolution. After data normalization, the ratio of Fe(II) to 5M-HCl extracted total Fe (i.e. [[EQUATION]]/[[EQUATION]]) significantly improved the correlation to R2 = 0.824 (p © 2024, The Authors. All rights reserved.

关键词： Dissolution

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Applications of machine learning tools for biological treatment of organic wastes: Perspectives and challenges

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Circular Economy 2024年第2期3卷

作者： Chen, Long He, Pinjing Zhang, Hua Peng, Wei Qiu, Junjie Lü, Fan State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Institute of Waste Treatment and Reclamation Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Biological treatment technologies (such as anaerobic digestion, composting, and insect farming) have been extensively employed to handle various degradable organic wastes. However, the inherent complexity and instability of biological treatment processes adversely affect the production of renewable energy and nutrient-rich products. To ensure stable processes and consistent product quality, researchers have invested heavily in control strategies for biological treatment, with machine learning (ML) recently proving effective in optimizing treatment, predicting parameters, detecting disturbances, and enabling real-time monitoring. This review critically assesses the application of ML in biological treatment, providing an in-depth evaluation of key algorithms. This study reveals that artificial neural networks, tree-based models, support vector machines, and genetic algorithms are the leading algorithms in biological treatment. A thorough investigation of the applications of ML in anaerobic digestion, composting, and insect farming underscores its remarkable capacity to predict products, optimize processes, perform real-time monitoring, and mitigate pollution emissions. Furthermore, this review outlines the challenges and prospects encountered in applying ML to biological treatment, highlighting crucial directions for future research in this area. © 2024 The Author(s)

关键词： Support vector machines

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Enhanced precipitation responses over the Tibetan Plateau following future Tambora-size volcanic eruption

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Advances in Climate Change Research 2024年第5期15卷 845-858页

作者： Xin-Jun GAN Lin-Shan YANG Meng ZUO Fei LIU Chao-Chao GAO College of Environmental and Resource Science Zhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058China State Key Laboratory of Severe Weather and Institute of Tibetan Plateau Meteorology Chinese Academy of Meteorological SciencesBeijing 100081China School of Atmospheric Sciences&Key Laboratory of Tropical Atmosphere Ocean System Ministry of Education Sun Yat-sen UniversiyZhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory Sun Yat-sen UniversityZhuhai 519082China

Hydroclimate over the Tibetan Plateau(TP)notably influences the eco-environment of the Northern *** its high elevation and complex topography,the climate in the TP shows a high sensitivity to anthropogenic warming and volcanic-induced *** mechanism by which a future volcanic or similar radiative perturbation affects precipitation in the TP under an anthropogenic warming climate must be addressed not only to enable regional adaptation but deepen our understanding of how a climate system evolves under such a dual ***,based on the Community Earth System Model version 1.2 and ensemble simulations under pre-industrial and RCP8.5 scenarios,we showed that a Tambora-sized volcanic perturbation led to severe rainfall reduction over the south TP in the following summer(June-August).Evaporation response accounted for a minor and relatively constant share of precipitation reduction following the Clausius-Clapeyron scaling,whereas dynamic processes triggered an El Nino-like response in the eastern equatorial Pacific,which suppressed the Walker and Hadley circulation and contributed to drying *** warming renders the post-Tambora hydroclimate responses with 30%higher severity as a result of the increased climatological moisture content and intensified El Nino response,which enhanced hydroclimate sensitivity and attenuated monsoon *** results illustrate the amplification effect of global warming on the plateau's hydroclimate responses to external forcings,which may add another layer of uncertainty on climate adaptation in this already complex region.

关键词： Tibetan Plateau The community earth system model Hydrological response Tambora eruption El Nino

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Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane for enhanced micropollutants degradation

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Frontiers of Environmental Science & Engineering 2023年第9期17卷 115-124页

作者： Xufang Wang Dongli Guo Jinna Zhang Yuan Yao Yanbiao Liu College of Environmental Science and Engineering Donghua UniversityShanghai 201620China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Numerous reagents have been proposed as electron sacrificers to induce the decomposition of permanganate(KMnO_(4))by producing highly reactive Mn species for micropollutants ***,this strategy can lead to low KMnO_(4) utilization efficiency due to limitations associated with poor mass transport and high energy *** the present study,we rationally designed a catalytic carbon nanotube(CNT)membrane for KMnO_(4) activation toward enhanced degradation of *** proposed flow-through system outperformed conventional batch reactor owing to the improved mass transfer via *** optimal conditionals,a>70%removal(equivalent to an oxidation flux of 2.43 mmol/(h·m^(2)))of 80μmol/L sulfamethoxazole(SMX)solution can be achieved at single-pass *** experimental analysis and DFT studies verified that CNT could mediate direct electron transfer from organic molecules to KMnO_(4),resulting in a high utilization efficiency of KMnO_(4).Furthermore,the KMnO_(4)/CNT system had outstanding reusability and CNT could maintain a long-lasting reactivity,which served as a green strategy for the remediation of micropollutants in a sustainable *** study provides new insights into the electron transfer mechanisms and unveils the advantages of effective KMnO_(4) utilization in the KMnO_(4)/CNT system for environmental remediation.

关键词： KMnO_(4) Carbon nanotubes Non-radical pathway Electron transfer Water treatment

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The Effects of Cu-Phenanthrene Co-Contamination on Adsorption-Desorption Behaviors of Phenanthrene in Soils

SSRN

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SSRN 2023年

作者： Li, Mengting Chen, Chuze Zhang, Wei Cao, Liu Zhang, Xueqi Wang, Yuting Xian, Qiming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nankai University China

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants (POPs) in the environment, which are teratogenic, carcinogenic, and mutagenic. Co-contamination of PAHs and heavy metal commonly exists in soil. In this study, 20 types of soils with different properties in China were collected and comprehensively characterized. Phenanthrene (Phe) and Cu (II) were selected as a representative of PAHs and heavy metals, respectively. The adsorption-desorption behaviors of Phe under Phe contamination and Cu (II)-Phe co-contamination in 20 types of soils were studied. The adsorption-desorption behaviors of Phe in 20 types of soils varied greatly, and adsorption of Phe in the soils followed both linear partitioning and nonlinear surface adsorption. Soil organic matter (SOM) plays an important role in the adsorption-desorption behavior of Phe. When the concentration of Phe were ＞ 50 μg/L, soft carbon (SC) fraction of SOM not black carbon (BC) contributed more to the adsorption of Phe. Soil dissolved organic matter (DOM), especially fulvic acid and humic acid fractions, contributes to the adsorption of Phe. Under the effect of Cu (II) (60 mg/L in solution), the adsorption capacity of soil for Phe increased, which possibly resulted from lowered pH, the existence of the cation-π bonding and the "bonding bridge" effect. The systematic investigation of adsorption-desorption behaviors of Phe in soils under heavy metal-PAHs co-contamination will provide a scientific basis for the calculation of soil environmental capacity in the future. © 2023, The Authors. All rights reserved.

关键词： Soils

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Tuning interfacial charge transfer for efficient visible-light-driven photodegradation and simultaneous H_(2)evolution

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Journal of Materials Science & Technology 2024年第1期168卷 35-49页

作者： Zhiyang Li Yaogang Chen Yinghe Zhang Wei Ai Qian Lei Tingjun Yao Dan Zhong Wenjie Liu Wenbiao Jin Lei Yang State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China Key Laboratory of Northwest Water Resources Environment and EcologyMinistry of EducationSchool of Environmental and Municipal EngineeringXi’an University of Architecture and TechnologyXi’an 710055China CNAS Accredited Test Center Guangdong Engineering Technology Research Center of Air PurificationHealthlead Co.Ltd.Shenzhen 518055China School of Science Harbin Institute of Technology ShenzhenShenzhen 518055China

The edge-graphitized carbon nitride(C_(3)N_(4)-C g)was prepared by secondary pyrolysis to construct ZnO/C_(3)N_(4)-C g(ZCN)type-Ⅱheterojunction photocatalyst via a facile sonication dispersion method,which achieved∼7.04-fold and∼18.3-fold enhanced visible-light-driven photocatalytic performance for refrac-tory micropollutant removal and simultaneous hydrogen(H_(2))evolution respectively compared to con-ventional ZnO/g-C_(3)N_(4)Step-scheme *** apparent quantum efficiency of the ZCN_(0.4)het-erojunction reaches 0.92%(λ=420 nm).Such excellent performance stems from that the edge-graphene moieties stitched onto the interface of heterojunction extend light absorption to the full visible spec-trum,meanwhile,the built-in electric field generated during Fermi level alignment accompanying fa-vorable band-bending structure provides an effective pathway for the rapid migration of photoinduced electrons via the edge graphene channel to improve interfacial charge separation ***,the midgap states introduced in ZCN heterojunction could temporarily retain photoexcited electrons to effectively inhibit the in situ carrier recombination for improved photocatalytic H_(2)***,ZCN/peroxymonosulfate system exhibited excellent anti-interference performance against complex water bodies under visible illumination due to the synergistic effect between the co-existing anions and organic ***,the eco-friendly nature of the ZCN/peroxymonosulfate system showed no biotoxicity of reaction filtrate on cell proliferation after treatment,which avoided secondary ***-ering the outstanding performance in photocatalysis,the ZCN system exhibits broad potential for practical applications in water pollution control and green energy production.

关键词： ZnO C_(3)N_(4)-C g Heterojunction Photodegradation Hydrogen evolution

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Synergistic PM_(2.5)and O_(3)control to address the emerging global PM_(2.5)-O_(3)compound pollution challenges

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Eco-Environment & Health 2024年第3期3卷 325-337页

作者： Chao He Jianhua Liu Yiqi Zhou Jingwei Zhou Lu Zhang Yifei Wang Lu Liu Sha Peng College of Resources and Environment Yangtze UniversityWuhan 430100China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhan 430100China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Hydrology and Environmental Hydraulics Group Wageningen University and ResearchWageningen 6700 HBthe Netherlands State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China State Key Joint Laboratory for Environmental Simulation and Pollution Control School of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China Collaborative Innovation Center for Emissions Trading System Co-constructed by the Province and Ministry Hubei University of EconomicsWuhan 430205China

In recent years,the issue of PM_(2.5)-O_(3)compound pollution has become a significant global environmental *** study examines the spatial and temporal patterns of global PM_(2.5)-O_(3)compound pollution and exposure risks,firstly at the global and urban scale,using spatial statistical regression,exposure risk assessment,and trend analyses based on the datasets of daily PM_(2.5)and surface O_(3)concentrations monitored in 120 cities around the world from 2019 to ***,on the basis of the common emission sources,spatial heterogeneity,interacting chemical mechanisms,and synergistic exposure risk levels between PM_(2.5)and O_(3)pollution,we proposed a synergistic PM_(2.5)-O_(3)control framework for the joint control of PM_(2.5)and *** results indicated that:(1)Nearly 50%of cities worldwide were affected by PM_(2.5)-O_(3)compound pollution,with China,South Korea,Japan,and India being the global hotspots for PM2.5-O3 compound pollution;(2)Cities with PM_(2.5)-O_(3)compound pollution have exposure risk levels dominated by ST t ST(Stabilization)and ST t HR(High Risk).Exposure risk levels of compound pollution in developing countries are significantly higher than those in developed countries,with unequal exposure characteristics;(3)The selected cities showed significant positive spatial correlations between PM_(2.5)and O_(3)concentrations,which were consistent with the spatial distribution of the precursors NOx and VOCs;(4)During the study period,52.5%of cities worldwide achieved synergistic reductions in annual average PM_(2.5)and O_(3)*** average PM_(2.5)concentration in these cities decreased by 13.97%,while the average O_(3)concentration decreased by 19.18%.This new solution offers the opportunity to construct intelligent and healthy cities in the upcoming low–carbon transition.

关键词： PM_(2.5)-O_(3)compound pollution Population exposure risk Spatial correlation Synergistic treatment potential

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