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Arbuscular mycorrhizal fungi regulate plant mineral nutrient uptake and partitioning in iron ore tailings undergoing eco-engineered pedogenesis

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Pedosphere 2024年第2期34卷 385-398页

作者： Zhen LI Songlin WU Yunjia LIU Qing YI Merinda HALL Narottam SAHA Junjian WANG Yuanfang HUANG Longbin HUANG College of Land Science and Technology China Agricultural UniversityBeijing 100193China centre for Mined Land Rehabilitation Sustainable Minerals InstituteThe University of QueenslandBrisbaneQLD 4072Australia Guangdong Provincial Key Laboratory of Soil and groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Excess available K and Fe in Fe ore tailings with organic matter amendment and water-deficiencies may restrain plant colonization and growth,which hinders the formation of eco-engineered soil from these tailings for sustainable and cost-effective mine site *** mycorrhizal(AM)fungi are widely demonstrated to assist plant growth under various unfavorable ***,it is still unclear whether AM symbiosis in tailings amended with different types of plant biomass and under different water conditions could overcome the surplus K and Fe stress for plants in Fe ore tailings,and if so,by what ***,host plants(Sorghum *** ***),either colonized or noncolonized by the AM fungi(Glomus spp.),were cultivated in lucerne hay(LH,C:N ratio of 18)-or sugarcane mulch(SM,C:N ratio of 78)-amended Fe ore tailings under well-watered(55%water-holding capacity(WHC)of tailings)or water-deficient(30%WHC of tailings)*** mycorrhizal colonization,plant growth,and mineral elemental uptake and partitioning were *** indicated that AM fungal colonization improved plant growth in tailings amended with plant biomass under water-deficient *** mycorrhizal fungal colonization enhanced plant mineral element uptake,especially P,both in the LH-and SM-amended tailings regardless of water ***,AM symbiosis development restrained the translocation of excess elements(i.e.,K and Fe)from plant roots to shoots,thereby relieving their *** AM fungal roles in P uptake and excess elemental partitioning were greater in LH-amended tailings than in SM-amended *** deficiency weakened AM fungal colonization and functions in terms of mineral element uptake and *** findings highlighted the vital role AM fungi played in regulating plant growth and nutrition status in Fe ore tailings technosol,providing an important basis for involvement of AM fungi in the eco-engineered pedo

关键词： Fe stress fungal symbiosis K stress mine site rehabilitation mycorrhizal colonization plant biomass amendment plant nutrition water deficiency

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Surrogate modeling for unsaturated infiltration via the physics and equality-constrained artificial neural networks

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 2282-2295页

作者： Peng Lan Jingjing Su Sheng Zhang school of Civil Engineering Central South UniversityChangsha410075China Discipline of Civil Surveying and Environmental EngineeringPriority Research Centre for Geotechnical Science and EngineeringThe University of NewcastleCallaghanNSW2308Australia Qinghai University Qinghai810016China

Machine learning(ML)provides a new surrogate method for investigating groundwater flow dynamics in unsaturated *** pure data-driven methods(*** neural network,DNN)can provide rapid predictions,but they do require sufficient on-site data for accurate training,and lack interpretability to the physical processes within the *** this paper,we provide a physics and equalityconstrained artificial neural network(PECANN),to derive unsaturated infiltration solutions with a small amount of initial and boundary *** takes the physics-informed neural network(PINN)as a foundation,encodes the unsaturated infiltration physical laws(*** equation,RE)into the loss function,and uses the augmented Lagrangian method to constrain the learning process of the solutions of RE by adding stronger penalty for the initial and boundary *** unsaturated infiltration cases are designed to test the training performance of PECANN,***-dimensional(1D)steady-state unsaturated infiltration,1D transient-state infiltration,two-dimensional(2D)transient-state infiltration,and 1D coupled unsaturated infiltration and *** predicted results of PECANN are compared with the finite difference solutions or analytical *** results indicate that PECANN can accurately capture the variations of pressure head during the unsaturated infiltration,and present higher precision and robustness than DNN and *** is also revealed that PECANN can achieve the same accuracy as the finite difference method with fewer initial and boundary training ***,we investigate the effect of the hyperparameters of PECANN on solving RE *** provides an effective tool for simulating unsaturated infiltration.

关键词： Richards equation(RE) Unsaturated infiltration Data-driven solutions Numerical modeling Machine learning(ML)

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GCM Simulations of Stable Isotopes in the Water Cycle in Comparison with GNIP Observations over East Asia

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Acta meteorologica Sinica 2012年第4期26卷 420-437页

作者：章新平孙治安关华德张新主吴华武黄一民 College of Resources and environmental Sciences Hunan Normal University centre for Australian Weather and Climate research school of the environment National Centre for Groundwater Research and TrainingFlinders University

In this paper, we examine the performance of four isotope incorporated GCMs, i.e., ECHAM4 （Univer- sity of Hamburg）, HadCM3 （Hadley centre）, GISS E （Goddard Institute of Space Sciences）, and MUGCM （Melbourne University）, by comparing the model results with GNIP （Global Network of Isotopes in Precip- itation） observations. The spatial distributions of mean annual δD and mean annual deuterium excess d in precipitation, and the relationship between δ18O and δD in precipitation, are compared between GCMs and GNIP data over East Asia. Overall, the four GCMs reproduce major characteristics of δD in precipitation as observed by GNIP. Among the four models, the results of ECHAM4 and GISS E are more consistent with GNIP observed precipitation δD distribution. The simulated d distributions are less consistent with the GNIP results. This may indicate that kinetic fractionation processes are not appropriately represented in the isotopic schemes of GCMs. The GCM modeled MWL （meteoric water line） slopes are close to the GNIP derived MWL, but the simulated MWL intercepts are significantly overestimated. This supports that the four isotope incorporated GCMs may not represent the kinetic fractionation processes well. In term of LMWLs （local meteoric water lines）, the simulated LMWL slopes are similar to those from GNIP observa- tions, but slightly overestimated for most locations. Overall, ECHAM4 has better capability in simulating MWL and LMWLs, followed by GISS E. Some isotopic functions （especially those related to kinetic frac- tionation） and their parameterizations in GCMs may have caused the discrepancy between the simulated and GNIP observed results. Future work is recommended to improve isotopic function parameterization on the basis of the high-resolution isotope observations.

关键词： GCM GNIP, stable isotope, deuterium excess, meteoric water line

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Reconstructed anti-corrosive and active surface on hierarchically porous carbonized wood for efﬁcient overall seawater electrolysis

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Science Bulletin 2024年第15期69卷 2337-2341页

作者： Zhijie Chen Wenfei Wei Xiaomin Xu Xiaosong Gu Changzhu Huang Wei Wei Zongping Shao Bing-Jie Ni Hong Chen Guangdong Provincial Key Laboratory of Soil and groundwater Pollution Control SUSTech Energy Institute for Carbon NeutralitySchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China UNSW Water research centre School of Civil and Environmental EngineeringThe University of New South WalesSydney 2052Australia Key Laboratory of Comprehensive and Highly Efﬁcient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China WA school of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth 6845Australia Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China centre for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydney 2007Australia

Seawater electrolysis for sustainable hydrogen fuel production emerges as an auspicious practice to decarbonize the global energy sector [1]. However, direct seawater electrolysis is severely challenged by the corrosion of anodes by chloride ions, the unwanted chloride oxidation reaction (Cl OR), and the low activity and high cost of catalysts [2].

关键词： corrosion seawater carbon

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Development of a soil-plant-atmosphere continuum model (HDS-SPAC) based on hybrid dual-source approach and its verification in wheat field

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Science China(Technological Sciences) 2012年第10期55卷 2671-2685页

作者： YANG YuTing SHANG SongHao GUAN Huade State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China school of the environment&national centre for groundwater research and Training Flinders UniversityAdelaide 5001Australia

HDS-SPAC,a new soil-plant-atmosphere continuum(SPAC) model,is developed for simulating water and heat transfer in *** model adopts a recently proposed hybrid dual source approach for soil evaporation and plant transpiration *** the above-ground part,a layer approach is used to partition available energy and calculate aerodynamic resistances,while a patch approach is used to derive sensible heat and latent heat fluxes from the two sources(soil and vegetation).For the below-ground part,soil water and heat dynamics are described by the mixed form of Richards equation,and the soil heat conductivity equation,*** two parts are coupled through ground heat flux for energy transfer,root-zone water potential-dependent stomatal resistance,and surface soil water potential-dependent evaporation for water *** is calculated from the water potential gradient at soil-atmosphere interface and aerodynamic resistance,and transpiration is determined using a Jarvis-type function linking soil water availability and atmospheric *** other processes,such as canopy interception and deep percolation,are also considered in the HDS-SPAC *** hybrid dual-source approach allows HDS-SPAC to simulate heat and water transfer in an ecosystem with a large range of vegetation cover change temporally or *** model was tested with observations at a wheat field in North China Plain over a time of three months covering both wet and dry *** fractional crop covers change from 30% to over 90%.The results indicated that the HDS-SPAC model can estimate actual evaporation and transpiration partitioning and soil water content and temperature over the whole range of tested vegetation coverage.

关键词： soil-plant-atmosphere continuum energy budget soil water dynamics dual-source model vegetation characteristics

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groundwater Recharge and Mixing in Arid and Semiarid Regions:Heihe River Basin,Northwest China

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 971-987页

作者： CAO Guoliang ZHENG Chunmiao Craig T.SIMMONS Institute of Water Sciences Peking UniversityBeijing 100871China school of the environment&national centre for groundwater research and Training Adelaide SA 5001Australia school of environmental Science and Engineering South University of Science and Technology of ChinaShenzhen 518055China Department of Geological Sciences University ofAlabamaTuscaloosaAlabama 35487USA

A sound understanding of groundwater recharged from various sources occurring at different time scales is crucial for water management in arid and semi-arid river basins. groundwater recharge sources and their geochemical evolution are investigated for the Heihe River Basin （HRB） in northwest China on the basis of a comprehensive compilation of geochemical and isotopic data. Geochemical mass- balance modeling indicates that mountain-block recharge accounts for a small fraction （generally less than 5%） of the shallow and deep groundwater sustaining the oasis, whereas infiltration of rivers and irrigation water contribute most of the groundwater recharge. Dedolomitization is the primary process responsible for the changes in groundwater chemical and carbon isotope compositions from the piedmont to the groundwater discharge zone, where the dedolomitization is very likely enhanced by modern agricultural activities affecting the shallow groundwater quality. Analysis of radioactive isotopes suggests that these primary recharge sources occur at two different time scales. Radiocarbon-derived groundwater age profiles indicate a recharge rate of approximately 12 mm/year, which probably occurred during 2000-7000 years B.P., corresponding to the mid-Holocene humid period. The recharge of young groundwater on the tritium-dated time scale is much higher, about 360 mm/year in the oasis region. Infiltration from irrigation canals and irrigation return flow are the primary contributors to the increased young groundwater recharge. This study suggests that groundwater chemistry in the HRB has been influenced by the complex interaction between natural and human-induced geochemical processes and that anthropogenic effects have played a more significant role in terms of both groundwater quantity and quality.

关键词： Heihe River Basin groundwater recharge groundwater mixing isotope hydrology

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太平洋十年涛动对全球地表气温变化的影响足迹

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Science Bulletin 2024年第4期69卷 445-448页

作者：梁莉莉 Alan D.Ziegler 陈德亮 Philippe Ciais 李肇新梁时婧王大山徐荣嵘曾振中 school of environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055China Faculty of Fisheries Technology and Aquatic Resources Mae Jo UniversityChiang Mai 50000Thailand Regional Climate Group Department of Earth SciencesUniversity of GothenburgGothenburg 40530Sweden Laboratoire des Sciences du Climat et de l’Environnement UniversitéParis-SaclayGif-sur-Yvette 91191France Laboratoire de Météorologie Dynamique Centre national de la recherche scientifiqueSorbonne UniversitéÉcole Normale SupérieureÉcole PolytechniqueParis 75000France Guangdong Provincial Key Laboratory of Soil and groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Sea surface temperature modes have been found to modulate anthropogenic global warming rates on annual and decadal timescales,sometimes leading to periods of“slowdown”despite increasing greenhouse gas emissions^([1]).

关键词：太平洋十年涛动地表气温 greenhouse

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不同水汽来源对湖南长沙地区降水中δD、δ^(18)O的影响

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自然资源学报 2012年第8期27卷 1404-1414页

作者：吴华武章新平关华德孙广禄黄一民张婷婷湖南师范大学资源与环境科学学院 school of environment National Centre for Groundwater Research and TrainingFinders University

根据2010年在长沙地区进行降水收集和气象要素观测的资料,分析了该地区降水中δ18O与温度、降水量之间的关系,揭示了降水中δD、δ18O的变化特征,讨论了水汽输送对降水中δ18O变化的影响。结果表明,在天气尺度下,长沙地区大气降水中δ18... 详细信息

根据2010年在长沙地区进行降水收集和气象要素观测的资料,分析了该地区降水中δ18O与温度、降水量之间的关系,揭示了降水中δD、δ18O的变化特征,讨论了水汽输送对降水中δ18O变化的影响。结果表明,在天气尺度下,长沙地区大气降水中δ18O与降水量、温度之间存在显著的负相关关系,即该地区降水中δ18O的变化具有显著的降水量效应及反温度效应。对长沙地区的降雪样和降雨样进行线性回归,得出大降水事件和降雪的大气降水线具有较大斜率和截距。随着降水量的减小,大气降水线方程的斜率和截距也逐渐减小,这主要由于小降水事件的雨滴在降落过程中受到二次蒸发强烈,同位素分馏强烈。利用HYSPLIT模式追踪该地区气流的轨迹发现,在季风降水期间(5—9月),δ18O值偏低的水汽主要来自孟加拉湾、南海洋面与西太平洋海区;在非季风降水期间(10—4月),δ18O值偏高的水汽主要来自西风带携带的水汽和局地水汽环流。

关键词： δD δ18O 降水 HYSPLIT模式水汽来源长沙地区

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Transformation of ammonium nitrogen and response characteristics of nitrifying functional genes in tannery sludge contaminated soil

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Journal of groundwater Science and Engineering 2022年第3期10卷 223-232页

作者： Xiang-ke Kong Zi-xuan Zhang Ping Wang Yan-yan Wang Zhao-ji Zhang Zhan-tao Han Li-sha Ma Institute of Hydrogeology and environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Key Laboratory of groundwater Remediation of Hebei Province and China Geological Survey Shijiazhuang 050061China school of Water Resources and environment China University of Geosciences(Beijing)Beijing 100083China Technical centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China

High concentrations of ammonium nitrogen released from tannery sludge during storage in open air may cause nitrogen pollution to soil and *** study the transformation mechanism of NH_(4)^(+)-N by nitrifying functional bacteria in tannery sludge contaminated soils,a series of contaminated soil culture experiments were conducted in this *** contents of ammonium nitrogen(as NH_(4)^(+)-N),nitrite nitrogen(as NO_(2)^(−)-N)and nitrate nitrogen(as NO_(3)^(−)-N)were analyzed during the culture period under different conditions of pollution load,soil particle and redox *** equation was used to interpret the change of NO_(3)^(−)-N with time in contaminated *** abundance variations of nitrifying functional genes(amoA and nxrA)were also detected using the real-time quantitative fluorescence PCR *** results show that the nitrification of NH_(4)^(+)-N was aggravated in the contaminated silt soil and fine sand under the condition of lower pollution load,finer particle size and more oxidizing *** sigmodial equation well fitted the dynamic accumulation curve of the NO_(3)^(−)-N content in the tannery sludge contaminated *** Cr(III)content increased with increasing pollution load,which inhibited the reproduction and activity of nitrifying bacteria in the soils,especially in coarse-grained *** accumulation of NO_(2)^(−)-N contents became more obvious with the increase of pollution load in the fine sand,and only 41.5%of the NH_(4)^(+)-N was transformed to NO_(3)^(−)-*** redox environment was the main factor affecting nitrification process in the *** to the aerobic soil environment,the transformation of NH_(4)^(+)-N was significantly inhibited under anaerobic incubation condition,and the NO_(3)^(−)-N contents decreased by 37.2%,61.9%and 91.9%under low,medium and high pollution loads,*** was stronger in the silt soil since its copy number of amoA and nxrA genes was two times larger t

关键词： Tannery sludge Transformation of ammonium nitrogen Cr(III)aging Fluorescence quantitative PCR Functional gene

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Phosphine production in anaerobic wastewater treatment under tetracycline antibiotic pressure

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Journal of environmental Sciences 2018年第7期30卷 239-250页

作者： Meiqing Lu Xiaojun Niu Weiyi Chen Zhu Liang Sheng You Xiaohong Gu school of environment and Energy South China University of Technology Guangzhou 510006 China State Key Laboratory of Lake Science and environment Nanjing 210008 China school of environmental Science and Engineering Southern University of Science and TechnologyShenzhen Key Laboratory of Soil and Groundwater Pollution Control Shenzhen 518055 China Guangdong Provincial Key Laboratory of Atmospheric environment and Pollution Control Guangzhou 510640 China China Water Resources Pearl River Planning Surveying & Designing Co. Ltd. Guangzhou 510640 China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSouth China University of Technology Guangzhou Higher Education Mega Centre Guangzhou 510006 China

The influence of tetracycline（TC） antibiotics on phosphine（PH3） production in the anaerobic wastewater treatment was studied. A lab-scale anaerobic baffled reactor with three compartments was employed to simulate this process. The reactor was operated in a TC-absence wastewater and 250 μg/L TC-presence wastewater for three months after a start-up period,respectively. The responses of p H, oxidation–reduction potential（ORP）, chemical oxygen demand（COD）, total phosphorus（TP）, enzymes activity（dehydrogenase and acid phosphatase）,and microbial community were investigated to reveal the effect of TC on PH3 *** suggested that the dehydrogenase（DH） activity, acid phosphatase（ACP） activity and COD have positive relationship with PH3 production, while p H, ORP level and the TP in liquid phase have negative relationship with PH3 production. With prolonged TC exposure, decrease in p H and increase in DH activity are beneficial to PH3 production, while decrease in COD and ACP activity are not the limiting factors for PH3 production.

关键词： Tetracycline antibiotic Anaerobic Wastewater treatment Phosphine production

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