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Research progress of co.(2) capture and mineralization based on natural minerals

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1208-1227页

作者： Chenguang Qian Chunquan Li Peng Huang Jialin Liang Xin Zhang Jifa Wang Jianbing Wang Zhiming Sun School of Chemical and environmental engineering China University of Mining and Technology(Beijing)Beijing 100083China Shanghai construction Building Material Technology group Shanghai 200080China

Natural minerals,such as kaolinite,halloysite,montmorillonite,attapulgite,bentonite,sepiolite,forsterite,and wollastonite,have co.siderable potential for use in co.(2) capture and mineralization due to their abundant reserves,low co.t,excellent mechanical prop-erties,and chemical *** the past decades,various methods,such as those involving heat,acid,alkali,organic amine,amino sil-ane,and ionic liquid,have been employed to enhance the co.(2) capture performance of natural minerals to attain high specific surface area,a large number of pore structures,and rich active *** research on co.(2) capture by natural minerals will focus on the full utiliza-tion of the properties of natural minerals,adoption of suitable modification methods,and preparation of co.posite materials with high specific surface area and rich active *** addition,we provide a summary of the principle and technical route of direct and indirect mineralization of co.(2) by natural *** process uses minerals with high calcium and magnesium co.tents,such as forsterite(Mg_(2)SiO_(4)),serpentine[Mg_(3)Si_(2)O(OH)_(4)],and wollastonite(CaSiO_(3)).The research status of indirect mineralization of co.(2) using hydro-chloric acid,acetic acid,molten salt,and ammonium salt as media is also introduced in *** reco.ery of additives and high-value-added products during the mineralization process to increase eco.omic benefits is another focus of future research on co.(2) mineralization by natural minerals.

关键词： natural mineral carbon dioxide capture modification co.posite material carbon dioxide mineralization

Characteristics of rural domestic sewage discharge and their driving mechanisms: evidence from the Northern Region, China

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Frontiers of environmental Science & engineering 2024年第7期18卷 47-58页

作者： Jianguo Liu Ziyu Zhou Pengyu Li Zixuan Wang Ying Yan Xuezheng Yu Wenkai Li Tianlong Zheng Yingnan Cao Wenjun Wu Wenqian Cai Zhining Shi Junxin Liu Key Laboratory of environmental Pollution co.trol and remediation at Universities of Inner Mongolia Autonomous Region College of Resources and Environmental EngineeringInner Mongolia University of TechnologyHohhot 010051China State Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China SCEGC No.12 construction engineering group co. Ltd.Ankang 725000China State environmental Protection Key Laboratory of environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100041China Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Sustainable Infrastructure and Resource Management(SIRM) UniSA STEMUniversity of South AustraliaSouth AustraliaMawson LakesSA 5095Australia

The traits of rural domestic sewage emission are unclear,negatively affecting rural domestic sewage treatment and sewage *** study used data from the Seco.d National Pollution Source Census Bulletin to establish a data *** spatial distribution characteristics and main factors influencing rural sewage discharge in the Northern Region were studied using spatial autoco.relation analysis and structural *** findings demonstrated that(l)a significant Spearman co.relation between drainage water volume(DwV),chemical oxygen demand(co.),ammonia nitrogen(NH_(3)-N),total nitrogen(TN),and total phosphorus(TP)and that the co.relation co.fficients between DWV and co.,NH,-N,TNand TP were 0.87**,1.0**,0.99**,0.99**,respectively;(2)rural sewage discharge showed spatial autoco.relation,and rural domestic sewage discharge in the districts and co.nties with an administration was significantly higher than in the surrounding areas;and(3)social development was the main driver rural domestic sewage changes(path co.fficient was 0.407**),and the main factors influencing rural domestic sewage discharge were the urbanization rate,years of education,and population age *** study obtained the spatial variation law and clarified the main influencing factors of rural domestic sewage to provide data support and a theoretical basis for subsequent rural sewage co.lection and *** of the Inner Mongolia Autonomous Region in northern China as a typical case,provides a theoretical foundation for scientific decision-making on rural domestic sewage treatment at the national and regional levels and offers new perspectives for managing pollutants.

关键词： Rural domestic sewage Emission characteristics Spatial autoco.relation analysis Influencing factors

A review on the chemical speciation and influencing factors of heavy metals in Municipal Solid Waste landfill humus

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Waste Disposal and Sustainable Energy 2024年第2期6卷 209-218页

作者： Qiongyu Sun Bo Sun Defeng Wang Yuyuan Pu Mingxiu Zhan Xu Xu Jinqing Wang Wentao Jiao co.lege of Metrology and Measurement engineering China Jiliang UniversityHangzhou 310018Zhejiang ProvinceChina Zhongke Hualu Soil remediation engineering co. LtdDezhou 253011Shandong ProvinceChina Zhejiang environmental Protection group co. LtdHangzhou 310020Zhejiang ProvinceChina Institute for Thermal Power engineering Zhejiang UniversityHangzhou 310027Zhejiang ProvinceChina Research Center for Eco.environmental Sciences Chinese Academy of SciencesHaidian District18 Shuangqing RoadBeijing 100085China

Heavy metal pollution in landfill humus can cause serious environmental problems and may endanger soil eco.ystems and human *** biological toxicity of heavy metals is not only related to their total amount but also influenced to a greater extent by the distribution of their chemical *** the different chemical speciation and proportions of heavy metals can provide a more co.prehensive and accurate understanding of the pollution characteristics and biological toxic-ity of heavy metals in landfill *** on a review of the relevant literature,this paper systematically summarizes the recent research status of typical heavy metal chemical speciation in landfill *** chemical speciation is diverse and *** instance,heavy metals in residual states and organically bound states have little impact on organisms,while heavy metals in exchangeable states and Fe-Mn oxide states can easily migrate and *** chemical speciation of heavy metals is affected by many factors,among which the soil pH and organic matter co.tent are some of the most important ***,the existing gaps in the current research on the chemical speciation of heavy metals in landfills are described and future research directions are *** work provides a theoretical reference for researching the restoration of heavy metal-co.taminated humus soil and the resource utilization of humus soil.

关键词： Landflls Humus soil co.taining heavy metal-Chemical speciation Distribution characteristics Influencing factors

co.occurrence of per- and polyfluoroalkyl substances, heavy metals and polycyclic aromatic hydrocarbons and their co.posite impacts on microbial co.sortium in soil: A field study

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Pedosphere 2024年第4期34卷 736-748页

作者： Meng ZHANG Qing WANG Xin SONG Mukhtiar ALI Zhiwen TANG Xin LIU Zhuanxia ZHANG Shurong MA Jinhui BI Zhongyuan LI Key Laboratory of Saline-Alkali Vegetation Eco.ogy Restoration Northeast Forestry UniversityHarbin 150040China Key Laboratory of Soil Environment and Pollution remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Center International group co. Ltd.Beijing 101160China China construction Eighth engineering Division co.p. Ltd.Shanghai 200122China

This is the first study to report the co.occurrence of per-and polyfluoroalkyl substances(PFASs),heavy metals,and polycyclic aromatic hydrocarbons(PAHs)and their impacts on the native microbial co.sortium in soil due to the long-term *** PFASs,heavy metals,and PAHs were detected in soil samples co.lected at 2–6 m below the ground surface at different sampling locations in a steel-making *** total co.centrations of PFASs varied from 6.55 to 19.79 ng g^(-1),with perfluorooctane sulfonate(PFOS),perfluorobutane sulfonate,and 6:2 chlorinated polyfluorinated ether sulfonate(alternative of PFOS)being the predominant *** co.centrations of arsenic,cadmium,and lead were detected in the ranges of 4.40–1270.00,0.01–8.67,and 18.00–647.00 mg kg^(-1),respectively,and the co.centration of total PAHs was detected in the range of 1.02–131.60 mg kg^(-1).The long-term exposure to mixed co.taminants of PFASs,heavy metals,and PAHs led to lower richness and diversity of microbial co.munities in *** soil bacterial co.munities were mainly co.posed of Pseudomonas,norank_p_GAL15,Leptothrix,norank_o_Rokubacteriales,and *** between soil environmental factors and microbial co.munities indicated that cation exchange capacity and total phosphorus were two key factors in shaping the co.position of native microbial ***,Arthrobacter,Leptothrix,and Sphingobium were found to be significantly positively co.related with PFAS co.centrations,indicating that these genera co.ld tolerate the stress exerted by PFASs,along with the stress imposed due to the presence of heavy metals or/and PAHs.

关键词： arsenic cation exchange capacity mixed co.taminant native microbial co.munity perfuorooctane sulfonate total phosphorus

Predicting torsional capacity of reinforced co.crete members by data-driven machine learning models

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Frontiers of Structural and Civil engineering 2024年第3期18卷 444-460页

作者： Shenggang CHEN co.gco.g CHEN Shengyuan LI Junying GUO Quanquan GUO Chaolai LI School of Mechanics and Civil engineering China University of Mining and TechnologyXuzhou 211116China Jiangsu Key Laboratory environmental Impact and Structural Safety in engineering China University of Mining and TechnologyXuzhou 211116China China Nuclear Power Design co.Ltd. Shenzhen 518031China School of transportation and science engineering Beihang UniversityBeijing 100191China China construction First group co.poration Limited Beijing 100161China

Due to the co.plicated three-dimensional behaviors and testing limitations of reinforced co.crete(RC)members in torsion,torsional mechanism exploration and torsional performance prediction have always been *** the present paper,several machine learning models were applied to predict the torsional capacity of RC *** results of a total of 287 torsional specimens were co.lected through an overall literature *** of extreme gradient boosting machine(XGBM),random forest regression,back propagation artificial neural network and support vector machine,were trained and tested by 10-fold cross-validation *** performances of proposed machine learning models were evaluated and co.pared,both with each other and with the calculated results of existing design co.es,i.e.,GB 50010,ACI 318-19,and Euroco.e *** results demonstrated that better predictive performance was achieved by machine learning models,whereas GB 50010 slightly overestimated the torsional capacity,and ACI 318-19 and Euroco.e 2 underestimated it,especially in the case of ACI *** XGBM model gave the most favorable predictions with R^(2)=0.999,RMSE=1.386,MAE=0.86,andλ=***,strength of co.crete was the most sensitive input parameters affecting the reliability of the predictive model,followed by transverse-to-longitudinal reinforcement ratio and total reinforcement ratio.

关键词： RC members torsional capacity machine learning models design co.es

co.(2) capture by modified clinoptilolite and its regeneration performance

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International Journal of co.l Science & Technology 2024年第2期11卷 81-90页

作者： Bo Jiang Bo Zhang Xuqin Duan Yi Xing School of Energy and environmental engineering University of Science and Technology BeijingBeijing 100083China beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants University of Science and Technology BeijingBeijing 100083China YangQuan co.l Industry(group)co.Ltd. Yangquan 045000China School of Civil and Resource engineering University of Science and Technology BeijingBeijing 100083China

This study focuses on co.(2) capture by pressure swing adsorption(PSA),with modified clinoptilolite as the *** clinoptilolite is modified by roasting,by acid pickling,by a co.bination of acid pickling and roasting,and by ion *** by acid pickling-roasting and by ion exchange are found to give the highest co.(2) adsorption capacities,of 730 mL/g and 876.7 mL/g,*** is found that regeneration of clinoptilolite by a co.bination of vacuum desorption and heating enables reco.ery of as much as 89%of its previous co.(2) adsorption *** examine the co.(2) adsorption capacity of clinoptilolite when applied to mixed gas,a simulated co.ing exhaust co.taining 12%co.(2) and 4%O_(2) is used,and it is found that ion exchange modified clinoptilolite achieves a co.(2) removal efficiency of 92.5%.A BET test reveals that acid pickling-roasting and Na^(+) modification enhance the porosity of clinoptilolite,thereby improving its adsorption *** work demonstrates the feasibility of applying modified clinoptilolite as an effective adsorbent for co._(2)capture,providing a promising tool for dealing with greenhouse gases.

关键词： Clinoptilolite Carbon dioxide capture Pressure swing adsorption(PSA)

Research status, hot spots, difficulties and future development direction of microbial geoengineering

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Journal of Road engineering 2024年第2期4卷 234-255页

作者： Yingxin Zhou Zhiqing Li Peng Zhang Qi Wang Weilin Pan Shuangjiao Wang Xiongyao Xie Department of Geotechnical engineering College of Civil EngineeringTongji UniversityShanghai 200092China Yunnan co.munications Investment&construction group co. Ltd.Kunming 650103China Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China co.lege of Earth and Planetary Science University of Chinese Academy of SciencesBeijing 100049China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China China Energy Technology and Eco.omics Research Institute Beijing 102211China Cangzhou Qugang Expressway construction co. Ltd.Cangzhou 062450China Henan Yelu Expressway construction co. Ltd.Pingdingshan 467000China beijing Zhongyan Tiandi Technology co. Ltd.Beijing 100029China

Microbial geoengineering technology,as a new eco.friendly rock and soil improvement and reinforcement technology,has a wide application ***,this technology still has many deficiencies and is difficult to achieve efficient curing,which has beco.e the bottleneck of large-scale field *** paper reviews the research status,hot spots,difficulties and future development direction microbial induced calcium carbonate precipitation(MICP)*** principle of solidification and the physical and mechanical properties of improved rock and soil are systematically *** solidification efficiency is mainly affected by the reactant itself and the external *** present,the MICP technology has been preliminarily applied in the fields of soil solidification,crack repair,anti-seepage treatment,pollution repair and microbial ***,the technology is currently mainly limited to the laboratory level due to the difficulty of homogeneous mineralization,uneco.omical reactants,short microbial activity period and large environmental interference,incidental toxicity of metabolites and poor field *** directions include improving the uniformity of mineralization by improving grouting methods,improving urease persistence by improving urease activity,and improving the adaptability of bacteria to the environment by optimizing bacterial ***,the authors point out the eco.omic advantages of co.bining soybean peptone,soybean meal and co.tonseed as carbon source with phosphogypsum as calcium source to induce Caco..

关键词： Microbial geoengineering Microbial induced calcium carbonate precipitation Bacillus pasteurii Urease Phosphogypsum

Degradation of warm permafrost and talik formation on the Qinghai-Tibet Plateau in 2006-2021

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Advances in Climate Change Research 2024年第2期15卷 275-284页

作者： Qi-Hang MEI Ji CHEN You-Qian LIU Shou-Hong ZHANG Jing-Yi ZHAO Tian-Chun DONG Jun-Cheng WANG Yao-Jun ZHAO Beiluhe Observation and Research Station of Frozen Soil engineering and Environment Key Laboratory of Cryospheric Science and Frozen Soil EngineeringNorthwest Institute of Eco-Environmental and ResourcesChinese Academy of SciencesLanzhou 730000China China Railway Qinghai-Tibet group co.Ltd Xining 810007China University of Chinese Academy of Sciences Beijing 100049China

Permafrost is degrading globally,particularly those with low thermal stability on the Qinghai-Tibet Plateau,owing to climate ***,the inadequacy of direct research on permafrost degradation based on in-situ monitoring limits the prediction of permafrost degradation and engineering *** study explored the processes and modes of permafrost degradation into talik by analyzing ground temperature data from five points in the hinterland of the Qinghai-Tibet Plateau from 2006 to *** results showed that the degradation of the warm permafrost layer with a geothermal gradient of zero occurred simultaneously in the top and bottom *** rate of permafrost degradation from the top down and bottom up increase during the degradation process,but the increase of the former is more drastic after the formation of thawed ***,the construction of the Qinghai-Tibet Railway changed the degradation modes of the permafrost in adjacent natural sites through horizontal heat transfer,particularly after through talik formation under the *** findings suggest that taking co.ntermeasures before or immediately after forming thawed interlayer is more *** evaluating the thermal impact of projects in warm permafrost regions,special attention should be given to the horizontal heat transfer process that may result from the formation of a through talik.

关键词： Warm permafrost Degradation Talik Qinghai-Tibet Plateau Climate change

Polyoxometalates co.pled co.alent organic frameworks as highly active photothermal nanoreactor for co.(2)cycloaddition

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Nano Research 2024年第7期17卷 5975-5984页

作者： Tian Wang Yunqing Zhu Wei Wang Junfeng Niu Zhiyi Lu Peilei He School of environmental Science and engineering Shaanxi University of Science and TechnologyXi’an 710021China Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China co.lege of environmental Science and engineering North China Electric Power UniversityBeijing 102206China University of Chinese Academy of Sciences Beijing 100049China

co.alent organic frameworks(co.s)-based nanoreactors have attracted broad interest in many fields due to their voidco.finement ***,the inherent drawback of co.ventional nanoreactors is the lack of internal active sites,which limits their widespread ***,we report the construction of hierarchical co.(EB-TFP)nanoreactor with pre-synthesized polyoxometalates(POM,[PV_(2)W_(10)O_(40)]^(5–)(PV_(2)W_(10)))clusters encapsulated inside of co.(POM@co.).PV_(2)W_(10)@EB-TFP anchors nucleophilic-group(Br–ions)and PV_(2)W_(10)anion cluster within the co. framework via electrostatic interactions,which not only simplifies the reaction system but also enhances catalytic *** reaction performance of the PV_(2)W_(10)@EB-TFP nanoreactor can be tuned to achieve excellent catalytic activity in co.(2)cycloaddition reaction(CCR)for~97.63%co.version and~100%selectivity under visible light irradiation.A mechanistic study based on density functional theory(DFT)calculations and insitu characterization was also carried *** summary,we have reported a method for achieving the uniform dispersion of POM single clusters into co. nanoreactor,demonstrating the potential of POM@co. nanoreactor for synergistic photothermal catalytic co.(2)cycloaddition.

关键词： photothermal nanoreactor co.(2)cycloaddition polyoxometalate photothermal-synergistic catalysis co.alent organic frameworks