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Fate of Cd during mineral transformation by sulfate-reducing bacteria in clay-size fractions from soils with high geochemical background

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Journal of Hazardous Materials 2023年第1期459卷 132213页

作者： Yan, Xing Guan, Dong-Xing Li, Jie Song, Yinxian Tao, Hua Zhang, Xianming Ma, Ming Ji, Junfeng Zhao, Wancang Chongqing Key Laboratory of Karst Environment School of Geographical Sciences Southwest University Chongqing400715 China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Institute of Soil and Water Resources and Environmental Science College of Environmental and Resource Sciences Zhejiang University Hangzhou310058 China College of Resources and Environment Southwest University Chongqing400715 China Department of Geosciences Faculty of Land Resource Engineering Kunming University of Science and Technology Yunnan Province Kunming650093 China Chongqing Geological and Mineral Resource Exploration and Development Bureau 607 Geological Team Chongqing401120 China Key Laboratory of Surficial Geochemistry Ministry of Education School of Earth Sciences and Engineering Nanjing University Nanjing210093 China

Sulfate-reducing bacteria (SRB) can immobilize heavy metals in soils through biomineralization, and the parent rock and minerals in the soil are critical to the immobilization efficiency of SRB. To date, there is little knowledge about the fate of Cd associated with the parent rocks and minerals of soil during Cd immobilized by SRB. In this study, we created a model system using clay-size fraction of soil and SRB to explore the role of SRB in immobilizing Cd in soils from stratigraphic successions with high geochemical background. In the system, clay-size fractions (particle size -OX) and the crystalline iron oxide (Fe-CBD), were separated by extraction. The reaction of SRB with them verified the transformation of primary iron-bearing minerals into secondary iron-bearing minerals, which contributed to Cd redistribution. This study shows that SRB could exploit the composition and structure of minerals to induce mineral recrystallization, thereby aggravating Cd redistribution and immobilization in clay-size fractions from stratigraphic successions with high geochemical background. © 2023 Elsevier B.V.

关键词： Iron oxides

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Pro K-Enhanced Mesophilic Anaerobic Co-Digestion of Food Waste and Pla/Pbat/Starch Plastics: key Gene and Pathway Activation for Methane and L-Lactate Production

SSRN

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SSRN 2024年

作者： Wang, Shizhuo Zhang, Tao Xia, Xuefen Zhang, Kuan Fan, Jianwei Zhang, Yalei Shen, Zheng State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment of MOE College of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Toilet and Sewage Treatment Technology Ministry of Agriculture and Rural Areas China Institute of New Rural Development College of Electronics and Information Engineering Tongji University Shanghai200092 China Key Laboratory of Rural Toilet and Sewage Treatment Technology Ministry of Agriculture and Rural Affairs Shanghai China

Due to the limitations of hydrolysis, numerous biodegradable plastics (BPs) have extended degradation cycles and reduced biodegradation rates under anaerobic conditions. To improve the anaerobic co-degradation efficacy of food waste mixed with commercial biodegradable plastics (PLA/PBAT/starch), porcine pancreatic lipase (PPL) and protease K (Pro K) were embedded in the plastics, and the reaction process was analyzed through metagenomics. Biomarkers at each stage of the anaerobic co-digestion process were measured to verify the accuracy of the pathway analysis. After Pro K enzyme embedding, according to the kinetic equations, the hydrolysis kinetic constant of the co-digestion system increased by 18.42%, accompanied by an increase in the degradation rate of plastics from 7.3% to 19.3%. In the hydrolysis phase, the pathways producing pyruvate and lactate from food waste and plastic hydrolysis were enhanced, respectively, according to the functional gene analysis. Interestingly, enzyme modification significantly enhanced the conversion pathway from D-lactate to L-lactate, raising the L/D ratio from 1:1 in control to a peak of 20:1 in PKBP. During the acidogenesis phase, the enrichment of L-lactate, led to an increase in acetate concentration, strengthening the pathways of converting L-lactate directly into acetate and via acetyl-CoA. In the methanogenesis phase, the genes for the acetoclastic and hydrogenotrophic methanogenesis pathways were both enhanced, resulting in methane production increases of 17.59%. This study attempts to verify the impact of enzyme modification on gene pathways in BP anaerobic co-digestion from the perspective of metagenomic analysis, thereby improving asynchronous multi-substrate degradation. © 2024, The Authors. All rights reserved.

关键词： Hydrolysis

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Uptake of Polycyclic Aromatic Hydrocarbons (Pahs) from Pah–Contaminated Soils to Carrots and Chinese Cabbages Under the Greenhouse and Field Conditions

SSRN

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SSRN 2024年

作者： Cao, Chun Wu, Yu-Yao Lv, Zhen-Ying Wang, Ji-Wei Wang, Chen-Wen Wang, Jun-Jian Chen, Huan College of Geography and Environmental Science Northwest Normal University Gansu Lanzhou730070 China Key Laboratory of Resource Environment and Sustainable Development of Oasis Gansu Lanzhou730070 China Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou730000 China University of Chinese Academy of Sciences Beijing100049 China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Department of Environmental Engineering and Earth Science Clemson University South Carolina29634 United States

Polycyclic aromatic hydrocarbons (PAHs) with the properties of structural stability, semi–volatility, and hydrophobicity are toxic and persistent in environments;thus, their transport and fate in agroecosystems is essential for reducing PAH accumulation in the edible parts of crops. Here, we cultivated cabbages (Brassica pekinensis L.) and carrots (Daucus carota L.) in PAH–contaminated soils under the greenhouse and field conditions. After harvesting, we observed a 9.5–46% reduction in soil ∑PAH concentrations. There were 37% of bioconcentration factors (BCFbs) > 1 and 93% of translocation factors (TFab) > 1, while low–molecular–weight (LMW) PAHs had higher BCFbs than high–molecular–weight (HMW) PAHs. The PAH concentrations showed significant and positive correlations among soils, the belowground parts, and the aboveground parts. The toxicity equivalent concentration (TEQBaP) followed the order of cabbage (greenhouse) > cabbage (field) > carrot (greenhouse) > carrot (field), suggesting potentially higher health risks in cabbage relative to carrot and vegetables under the greenhouse relative to field condition. Our study suggested growing carrots under field conditions as a management strategy for reducing the risks of vegetables grown in PAH–contaminated soils. © 2024, The Authors. All rights reserved.

关键词： Health risks

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Enhancing rice production sustainability and resilience via reactivating small water bodies for irrigation and drainage (vol 14, 3794, 2023)

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NATURE COMMUNICATIONS 2023年第1期14卷 1-11页

作者： Li, Sisi Zhuang, Yanhua Liu, Hongbin Wang, Zhen Zhang, Fulin Lv, Mingquan Zhai, Limei Fan, Xianpeng Niu, Shiwei Chen, Jingrui Xu, Changxu Wang, Na Ruan, Shuhe Shen, Wangzheng Mi, Menghan Wu, Shengjun Du, Yun Zhang, Liang Hubei Provincial Engineering Research Center of Non-Point Source Pollution Control Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430077 PR China Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei Wuhan 430077 PR China University of Chinese Academy of Sciences Beijing 100049 PR China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 PR China State Environmental Protection Key Laboratory of Soil Health and Green Remediation Huazhong Agricultural University Wuhan 430070 PR China Interdisciplinary Research Center for Territorial Spatial Governance and Green Development Huazhong Agricultural University Wuhan 430070 PR China Institute of Plant Protection Soil and Fertilizer Sciences Hubei Academy of Agricultural Sciences Wuhan 430064 PR China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 PR China Liaoning Academy of Agricultural Sciences Shenyang 110161 PR China Institute of Soil & Fertilizer and Resources & Environment Jiangxi Academy of Agricultural Sciences Nanchang 330200 PR China

Rice farming threatens freshwater resources, while also being increasingly vulnerable to drought due to climate change. Rice farming needs to become more sustainable and resilient to climate change by improving irrigation drainage systems. Small water bodies, used to store drainage water and supply irrigation in traditional rice farming systems have gradually been abandoned in recent decades. This has resulted in a higher water footprint (WF) associated with rice farming due to increased freshwater usage and wastewater release, also leaving rice production more vulnerable to extreme weather events. Here, we propose how protecting and reactivating small water bodies for rice irrigation and drainage can decrease rice production WF in China by 30%, save 9% of China’s freshwater consumption, increase irrigation self-sufficiency from 3% to 31%, and alleviate yield loss in dry years by 2–3%. These findings show that redesigning rice irrigation drainage systems can help meet water scarcity challenges posed by climate change.

关键词： environmental health Hydrology Wetlands ecology

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Non-invasive micro-test technology and applications

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Biophysics Reports 2025年第2期11卷 96-111页

作者： Kai Sun Yunqi Liu Yanshu Pan Dongwei Di Jianfang Li Feiyun Xu Li Li Yoshiharu Mimata Yingying Chen Lixia Xie Siqi Wang Wenqian Qi Yan Tang Huachun Sheng Bing Wang Ruixue Sun Dingquan Tan Daohong Fu Ye Yin Ao Xue Yichao Shi Wenjing Shao Lei Gong Zhijian Jiang Wei Zhang Qiangsheng Wu Yaosheng Wang Minglin Lang Wenxiu Ye Weifeng Xu Shuhe Wei Weiming Shi Yue Jeff Xu College of Life Sciences Nanjing Normal University Zhongguancun Xuyue NMT Industrial Alliance NMT International Alliance College of Traditional Chinese Medicine Beijing University of Chinese Medicine State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences College of Biological Science China Agricultural University Center for Plant Water-use and Nutrition Regulation and College of Resources and Environment Joint International Research Laboratory of Water and Nutrient in Crop Fujian Agriculture and Forestry University Institute of Agricultural Resources and Environment Tianjin Academy of Agricultural Sciences Peking University Institute of Advanced Agricultural Sciences Shandong Laboratory of Advanced Agricultural Sciences at Weifang Guangxi Forestry Research Institute Institute of Wetland Agriculture and Ecology Shandong Academy of Agricultural Science Key Laboratory of Wastewater Treatment Technology of Liaoning Province Academy of Environmental and Chemical Engineering Shenyang Ligong University Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences Technical Institute of Physics and Chemistry CAS Institute of Qinghai-Tibetan Plateau Southwest Minzu University Molecular Genetics Key Laboratory of China Tobacco Guizhou Academy of Tobacco Science College of Agriculture and Forestry Hebei North University Smart Health Institute Chongqing Vocational College of Media Institute of Biology Humboldt University of Berlin College of Horticulture Qingdao Agricultural University College of Pharmacy Heilongjiang University of Chinese Medicine Department of Gastroenterology Aerospace Center Hospital Peking University Aerospace School of Clinical Medicine CAS Center for Excellence in Biotic Interactions College of Life Science University of Chinese Academy of Sciences State Key Laboratory of Grassland Agro-ecosystems School of Life Sciences College of Horticulture and Garden

Non-invasive micro-test technology（NMT） reveals dynamic ionic/molecular concentration gradients by measuring fluxes of ions and small molecules in liquid media in 1D, 2D or 3D fashions with sensitivity up to pico-(10-12) or femto-(10-15) moles per cm2per second. NMT has been applied to study metabolism, signal transduction, genes and/or proteins physiological functions related to transmembrane ionic/molecular activities with live samples under normal conditions or stress. Data on ion and/or molecule homeostasis（IMH） by NMT in biomedical sciences, plant and crop sciences, environmental sciences, marine and space biology as well as traditional Chinese medicine are reviewed.

关键词： Non-invasive micro-test technology Transmembrane transport Ionic homeostasis H+-ATPase Calcium signature Physiology

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A remote sensing monitoring method for alpine grasslands desertification in the eastern Qinghai–Tibetan Plateau

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Journal of Mountain Science 2020年第6期17卷 1423-1437页

作者： KUANG Qian YUAN Quan-zhi HAN Ji-chong LENG Rong WANG Yu-shuang ZHU Ke-hong LIN Shuo REN Ping Key Laboratory of Land Resources Evaluation and Monitoring in Southwest Ministry of EducationSichuan Normal UniversityChengdu 610068China Institute of Geography and Resources Science Sichuan Normal UniversityChengdu 610068China Key Laboratory of Environmental Change and Natural Disaster MOE/State Key Laboratory of Earth Surface Processes and Resources EcologyFaculty of Geographical ScienceAcademy of Disaster Reduction and Emergency ManagementBeijing Normal UniversityBeijing 100875China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Collge of Resources Sichuan Agricultural UniversityChengdu 611130China

Alpine grassland is the typical vegetation in the eastern Qinghai–Tibetan Plateau,which has important ecological service functions,and also supports the development of alpine stock *** recent years,under both the natural and human disturbance,alpine grasslands in this area have appeared to different degrees of desertification.A diagnosis of the desertification degree serves as the basis for grassland ecological *** study constructs a comprehensive index based on remote sensing called alpine grassland desertification index(AGDI)to monitor the areas and degree of *** most relevant indicators of desertification,namely,vegetation fraction,aboveground biomass,soil moisture,and land surface temperature,were selected to establish *** geographical detector is used to reselect and assess these *** results show that the overall verification accuracy of AGDI is 82.05%.In particular,the accuracy of identifying severe desertification is the *** study confirms that the desertification of alpine grasslands in the eastern Qinghai–Tibetan Plateau is characterized by ***,Landsat-8 OLI data with a spatial resolution of 30 m is more suitable than MODIS data for alpine grasslands desertification *** research results can provide a methodological reference for monitoring desertification of alpine grasslands and other grassland regions in the world.

关键词： Desertification monitoring Alpine grassland desertification index(AGDI) Geographical detector Zoige county

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Substantial transition to clean household energy mix in rural China

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National Science Review 2022年第7期9卷 137-151页

作者： Guofeng Shen Rui Xiong Yanlin Tian Zhihan Luo Bahabaike Jiangtulu Wenjun Meng Wei Du Jing Meng Yuanchen Chen Bing Xue Bin Wang Yonghong Duan Jia Duo Fenggui Fan Lei Huang Tianzhen Ju Fenggui Liu Shunxin Li Xianli Liu Yungui Li Mu Wang Ying Nan Bo Pan Yanfang Pan Lizhi Wang Eddy Zeng Chao Zhan Yilin Chen Huizhong Shen Hefa Cheng Shu Tao College of Urban and Environmental Sciences Peking University Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC)Nanjing University of Information Science and Technology Institute of Reproductive and Child Health Peking University Laboratory of Geographic Information Science School of Geographic Sciences East China Normal University The Bartlett School of Sustainable Construction University College London College of Environment Zhejiang University of Technology Institute of Applied Ecology Chinese Academy of Sciences Department of Epidemiology and Biostatistics School of Public Health Peking University College of Resources and Environment Shanxi Agricultural University Xinjiang Key Laboratory of Environmental Pollution and Bioremediation Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences National Engineering Technology Research Center for Desert-Oasis Ecological Construction Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences University of Chinese Academy of Sciences School of Geography and Tourism Anhui University School of Environment Nanjing University College of Geography and Environmental Science Northwest Normal University College of Geographical Science Qinghai Normal University Academy of Plateau Science and Sustainability College of Chemistry Chemical Engineering and Environment Minnan Normal University School of Environmental Science and Engineering Hubei Polytechnic University Department of Environmental Engineering Southwest University of Science and Technology College of Food Science Tibet Agricultural and Animal Husbandry University College of Geography and Ocean Sciences Yanbian University Faculty of Environmental Science and Engineering Kunming University of Science and Technology College of Geography and Environmental Science Henan University College of Ecology and Environment Hainan University School of Environment Ji

The household energy mix has significant impacts on human health and climate,as it contributes greatly to many health-and climate-relevant air *** to the well-established urban energy statistical system,the rural hous ehold energy statistical system is incomplete and is often associated with high *** a nationwide investigation,this study reve aled high contributions to energy supply from coal and biomass fuels in the rural household energy sector,while electricity comprised ～20%.Stacking(the use of multiple sources of energy) is significant,and the average number of energy types was 2.8 per *** to 2012,the consumption of biomass and coals in 2017 decreased by 45% and 12%,respectively,while the gas consumption amount increased by 204%.Increased gas and decreased coal consumptions were mainly in cooking,while decreased biomass was in both cooking(41%) and heating(59%).The time-sharing fraction of electricity and gases(E&G) for daily cooking grew,reaching 69% in 2017,but for space heating,traditional solid fuels were still dominant,with the national average shared fraction of E&G being only 20%.The non-uniform spatial distribution and the non-linear increase in the fraction of E&G indicated challenges to achieving universal access to modern cooking energy by 2030,particularly in less-developed rural and mountainous *** some non-typical heating zones,the increased share of E&G for heating was significant and largely driven by income growth,but in typical heating zones,the time-sharing fraction was <5 % and was not significantly increased,except in areas with policy *** intervention policy not only led to dramatic increases in the clean energy fraction for heating but also accelerated the clean cooking *** income,higher education,younger age,less energy/stove stacking and smaller family size positively impacted the clean energy transition.

关键词： household energy mix energy transition clean heating modern energy sustainable development

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Decoupling the effects of climate, topography, land use, revegetation, and dam construction on streamflow, sediment, total nitrogen and phosphorus in the Yangtze River Basin

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Science of the Total Environment 2025年 968卷 178800页

作者： Ning, Yinan Nunes, Joao Pedro Zhou, Jichen Baartman, Jantiene Ritsema, Coen J. Xuan, Yunqing Liu, Xuejun Ma, Lihua Chen, Xinping Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and Environment Southwest University Chongqing400715 China Soil Physics and Land Management Group Wageningen University and Research Wageningen Netherlands State Key Laboratory of Nutrient Use and Management College of Resources & Environmental Sciences National Academy of Agriculture Green Development China Agricultural University Beijing100193 China Faculty of Science and Engineering Bay Campus Swansea University Fabian Way SwanseaSA1 8EN United Kingdom

Evaluating changes in streamflow, sediment, and nutrient fluxes, as well as quantifying their influencing factors, is crucial for regional water resource protection. While the relationships between major influencing factors and these indicators have been widely studied, the quantitative contributions of the separate and interactive effects of these influencing factors have not been fully explored. This study quantitatively evaluated the changing characteristics of streamflow, sediment discharge, total nitrogen (TN) and total phosphorus (TP), as well as the separate and interactive effects of various major influencing factors such as—rainfall, temperature, evapotranspiration (ET), revegetation, dam construction, and land use change—by applying the GeoDetector method to account for their spatial heterogeneity and contributions. Our findings reveal that the influence of these factors has gradually intensified over time, with dam construction and land use change emerging as the most significant contributors to changes in sediment discharge and TN, respectively. Notably, the interactive effects between dam capacity and vegetation cover on streamflow and sediment discharge was twice as strong as their separate impacts, highlighting the effectiveness of integrating dam construction with reforestation to control erosion and sediment transport. Similarly, the interaction of dam capacity and land use change had a 1.5 times greater impact on TN and TP than their separate effects, indicating that reducing fertilizer application at the source and in the meantime implementing direct interception measures are more effective ways to control water pollution. These findings provide a solid foundation for policymakers to develop integrated water management strategies targeting multiple factors simultaneously, that address both water quantity and quality concerns in the Yangtze River Basin and similar regions. © 2025 The Authors

关键词： Revegetation

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Revealing the underestimated role of Gram-positive bacteria in iron reduction within paddy soils

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Science of the Total Environment 2025年 970卷 178985页

作者： Huang, Yu Tan, Yuquan Shen, Lin Peng, Chao Li, Yaying Zhang, Juntao Zhang, Fengrong Ni, Chunlin Liu, Wei Wu, Yundang Li, Fangbai College of Materials and Energy South China Agricultural University Guangzhou510642 China National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management Institute of Eco-Environmental and Soil Sciences Guangdong Academy of Sciences Guangzhou510650 China Key Laboratory of Southwest China Wildlife Resources Conservation College of Life Sciences China West Normal University Nanchong China Institute of Agricultural Resources and Environment Guangdong Academy of Agricultural Science Guangzhou510640 China Guangzhou Institute of Forestry and Landscape Architecture Guangzhou510405 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China University of Chinese Academy of Sciences Beijing100049 China

Iron reduction in paddy fields is crucial for heavy metal migration and nutrient transformation. Gram-negative iron-reducing bacteria like Geobacter and Shewanella have been widely studied due to their strong extracellular electron transfer capabilities. In contrast, Gram-positive bacteria such as Bacillus and Clostridium are often labeled as weak exoelectrogens, leading to their contributions being overlooked. But could their role in iron reduction have been underestimated? To explore this, we enriched paddy soils with glucose, resulting in a predominance of Gram-positive bacteria (e.g., Clostridiaceae and Bacillaceae) and a small presence of Gram-negative reducers (e.g., Geobacteraceae). Remarkably, despite the abundance of Gram-positive iron reducers being 880 times higher in the glucose system, their iron reduction rate was comparable to that of acetate and lactate systems with more Gram-negative bacteria. This suggests a significant contribution by Gram-positive bacteria to iron reduction. Pure culture experiments further revealed that the iron reduction rates of Bacillus and Clostridium are 15.4 and 4.0 times slower, respectively, than a Gram-negative reducer, Geobacter. However, even in natural paddy soil of this study, Gram-positive iron reducers are 9 times more abundant than Gram-negative ones. This gives us an unexpected insight: Considering both abundance and rate, Gram-positive weak exoelectrogens may actually contribute significantly to iron reduction. This study reveals the underestimated role of Gram-positive bacteria in paddy soils, highlighting the unique characteristics of paddy habitats and the need for further research on these weak exoelectrogens. © 2025 Elsevier B.V.

关键词： Bacillus Clostridium Gram-positive bacteria Iron reduction Weak exoelectrogens

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Characterization and Reconstruction of Rough Fractures Based on Vector Statistics

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SSRN 2023年

作者： Wu, Mingyang Jiang, Changbao Deng, Bozhi Gao, Ke Li, Minghui Liu, Bo State Key Laboratory of Geomechanics and Geotechnical Engineering Wuhan Institute of Rock and Soil Mechanics Chinese Academy of Science Wuhan430071 China Hubei Key Laboratory of Geo-Environmental Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan430071 China State Key Laboratory of Coal Mine Disaster Dynamics and Control School of Resources and Safety Engineering Chongqing University Chongqing400030 China Department of Earth and Space Sciences Southern University of Science and Technology Shenzhen518055 China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green Energy Shenzhen University Shenzhen518060 China Faculty of Earth Science and Environmental Engineering Southwest Jiaotong University Chengdu611756 China

The characteristics of fracture networks is of great significance for unconventional geo-energy exploitation such as shale oil, shale gas and geo-thermal extraction. Natural fractures and induced fractures after reservoir stimulation control the mechanical properties and fluid flow of the reservoirs. The quantitative characterization and reconstruction of rough fractures are essential for studying the fluid flow and mechanical properties of the reservoirs with complicated fracture networks. Based on vector statistics, a vector statistical method (VSM) for quantitative characterization of rough fractures is proposed and tested using 10 standard joint profiles. Furthermore, stochastic reconstruction algorithms for single rough fractures in two-dimensional (2D) and three-dimensional (3D) models are proposed. Afterwards, a morphology comparison and quantitative evaluation of single rough fractures before and after reconstruction are conducted. When the reconstruction algorithms for a single rough fracture are used, the difference in the tortuosity and different fractal dimensions before and after reconstruction are less than 5% and 2.5%, respectively, which means the reconstruction algorithms proposed herein can reconstruct rough fractures with approximate statistical characteristics and quantitative characterization parameters. Subsequently, these stochastic reconstruction algorithms for single rough fractures are further developed for 2D and 3D modeling of conventional and rough discrete fracture networks. The results indicate that the stochastic reconstruction algorithms proposed in this study have significant potential for rough discrete fracture network modeling. In addition, the merits and limitations of the proposed algorithms in modeling discrete fracture network models are discussed. © 2023, The Authors. All rights reserved.

关键词： Vectors

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