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Electrodeposited copper enhanced removal of 2,4-dichlorophenol in batch and flow reaction in Cu@CC-PS-MFC system

Chemosphere 2023年 340卷 139801页

作者： Zhu, Minjie Wang, Hongyuan Li, Chunji Liu, Qinglong Wang, Lan Tang, Jingchun National Engineering Laboratory for Site Remediation Technologies/MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University Tianjin300350 China State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Key Laboratory of Non-point Source Pollution Control Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China

Combination of microbial fuel cell (MFC) and advanced oxidation process (AOP) is promising for pollutant removal. In this paper, Cu0-loaded carbon cloth cathode by electrodeposition (Cu@CC-PS-MFC) was applied to enhance 2,4-dichlorophenol (2,4-DCP) degradation based on persulfate (PS) activation in microbial fuel cell. Cu0 exhibited a typical structure of face-centered cubic metal polyhedron on carbon cloth. The removal of 2,4-DCP by Cu@CC-PS-MFC (75.6%) was enhanced by more than 50% compared to CC-PS-MFC (49.2%) after 1 h of reaction. 30 mg/L 2,4-DCP in Cu@CC-PS-MFC was completely removed and achieved a high mineralization (80.6%) after 9 h of reaction under optimized condition with low dissolved copper ion concentration (0.615 mg/L). Meanwhile, more than 90% removal of 2,4-DCP was stably achieved with flow operation condition (hydraulic residence time of 7.2 h). The change of copper valent state Cu0/Cu2O/CuO was the main mechanism of PS activation with main reactive species of O•H and O21. The bioanode of MFC enhanced the in-situ regeneration of ≡Cu+ and ≡Cu0 on the catalyst surface by transporting electrons, which was believed to contribute to good catalyst lifetime and excellent 2,4-DCP removal. Electrodeposited copper contributes to the enhanced degradation of 2,4-DCP with energy recovery at the same time which can further broaden the application MFC. © 2023 Elsevier Ltd

关键词： Metal ions

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Environmental Risk Threshold for Cd in Chinese Soils

SSRN

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SSRN 2023年

作者： Yu, Lei Chen, Shibao Wang, Jing Qin, Luyao Sun, Xiaoyi Zhang, Xing Wang, Meng State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing10085 China University of Chinese Academy of Sciences Beijing100049 China

Soil environmental risk threshold of cadmium (Cd) is an important index in formulating soil protection policy. Although there is less study on how to determine soil Cd environmental risk threshold, it is a crucial indicator in formulating soil conservation policies and a key factor in assessing soil environmental quality. The hazard concentration of 5% species (HC5, which protects 95% of species) was determined here using different toxicological data of Cd from 23 test endpoints, interspecific extrapolation using the species sensitivity distribution (SSD) method, and a prediction model was created on the basis of numerous soil parameters. According to the findings, Cd effective concentration (EC10) (Cd concentration which blocks 10% of an endpoint's bioactivity) varied from 0.109 to 221 mg·kg-1, and the hormetic response induced by Cd reached 118% displaying in the dose-response curve of Lolium perenne L.. Toxicology data was rectified by the aging factor considering biogeochemical processes of the newly added pollutants prior to SSD curves fitting. After that, the prediction model was created with the equation of LogHC5 = 0.147 pH + 0.067 OC -1.616. The field test properly validated the prediction model, demonstrating its ability to forecast Cd toxicity levels for various soil conditions. This study offers a scientifically sound methodology for determining the environmental risk limitation for Cd and identifies critical paths for the preservation of environmental species. © 2023, The Authors. All rights reserved.

关键词： Soils

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Subsurface Organic Fertilization Increases Ecosystem Multifunctionality and Sunflower Yield in Saline Soil

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SSRN 2023年

作者： Song, Jiashen Zhang, Hongyuan Chang, Fangdi Yu, Ru Wang, Jing Zhang, Xiangqian Liu, Junmei Wang, Weini Zhou, Jie Li, Yuyi Chen, Aiping Xu, Yang Liu, Yu State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China The Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China Yichang Sub-Center of Water Resources Development Research Center of Inner Mongolia Hetao Irrigation Area Wuyuan015100 China China Agricultural University China

Salt stress poses a growing constraint on crop productivity in arid regions worldwide. Previous evidence indicated that organic fertilization is a pivotal management practice for enhancing crop yield and soil fertility in agroecosystems. How organic fertilization depths influence the associations among soil health, ecosystem multifunctionality, and crop yield, however, still remains unclear. Thus, a 3-year field experiment was carried out to investigate the impacts of the application of humic acid and manure at 0-15 cm of surface and 15-30 cm of subsurface on soil quality index, enzyme activities, ecosystem multifunctionality, as well as crop yield in saline soils. Subsurface organic fertilization improved soil quality index between 0-45 cm soil by 20-47%, whilst surface organic fertilization improved soil quality index only at 0-30 cm by 15-51%. The higher soil quality under surface fertilization was characterized by an increase in soil organic carbon, available nutrients, and a decrease in electrical conductivity compared to surface fertilization. The application of organic fertilization promoted microbial diversity and richness, enzyme activities, and ultimately improved soil ecosystem multifunctionality. However, soil ecosystem multifunctionality was increased by 122-214% at 0-30 cm under subsurface organic fertilization, whilst it was increased by 178% only at 0-15 cm layer. Pairwise comparisons further confirmed that electrical conductivity and soil organic carbon were negatively and positively correlated with soil ecological functions between 0-45 cm, respectively. The higher soil quality and a microenvironment with higher ecosystem multifunctionality under subsurface fertilization increased sunflower yield by 16% and 8% as compared to chemical fertilizer only and surface fertilization, respectively. This probably because of the effective improvement in soil electrical conductivity, soil organic carbon, the activities of β-glucosidase, and diversity and richn

关键词： Ecosystems

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Electrochemical Degradation of Small Molecule Dyes by TiO2-Decorated Polyacrylonitrile Nanofiber Membranes with Superior Properties

SSRN

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SSRN 2024年

作者： Yang, Xiuying Zhao, Chennan Zhang, Zezhou Zhao, Boyu Yang, Xiangdong Shen, Ao Ye, Meiqi Wang, Wenyi Tianjin Key Laboratory of Hollow Fiber Membrane Materials and Processes School of Materials Science and Engineering Tiangong University Tianjin300387 China State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs The Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China

In order to optimize the uniform dispersion of nanoparticles and enhance their catalytic effect for the degradation of small molecule dyes in textile wastewater, titanium dioxide (TiO2) was deposited on polyacrylonitrile (PAN) fiber membranes using magnetron sputtering technology, and TiO2/PAN nanofiber membrane (NFM) with low content and high catalytic efficiency was successfully prepared. Through membrane separation coupling electrocatalysis, the composite membranes exhibited outstanding performance in removing Congo red (CR), Sunset yellow (SY), Methyl orange (MO), and Methylene blue (MB) dyes, with removal rates of 99.5%, 98.8%, 98.5%, and 87.2% respectively. Even after continuous catalysis for 10 h, the composite membranes maintained a high dye removal rate, demonstrating their remarkable stability and water treatment capabilities. Furthermore, TiO2/PAN NFMs displayed high pure water flux, dye flux, and mechanical strength. Specifically, M20 (magnetron sputtering time of 20 min) showed water flux and dye (SY) flux values of 1943.69 L·m-2·h-1·bar-1 and 815.56 L·m-2·h-1·bar-1, respectively, and indicate superior mechanical and electrochemical properties. During the electrocatalytic process, TiO2/PAN NFMs generated reactive oxygen species (ROS) on the surface, imparting a self-cleaning property that extended the service life of the membranes and offered an effective solution for textile wastewater treatment. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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Remobilization of Cd caused by iron oxide phase transformation and Mn2+ competition after stabilization by nano zero valent iron

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Chemosphere 2024年 350卷

作者： Liu, Mengjiao Wang, Xiya Tang, Sheng Zhou, Jingjie Liu, Longfei Ma, Qingxu Wu, Lianghuan Xu, Meng State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China the Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs Beijing100081 China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment College of Environmental and Resource Sciences Zhejiang University Hangzhou310058 China College of Environmental Science and Engineering Yangzhou University Yangzhou225127 China

Stabilization techniques are vital in controlling Cd soil pollution. Nano zero valent iron (nZVI) has been extensively utilized for Cd remediation owing to its robust adsorption and reactivity. However, the environmental stress-induced stability of Cd after nZVI addition remains unclear. A pot experiment was conducted to evaluate the Cd bioavailability in continuously flooded (130 d) soil after stabilization with nZVI. The findings indicated that nZVI application did not result in a decline in Cd concentration in rice, as compared to the no-nZVI control. Additionally, nZVI simultaneously increased the available Cd concentration, iron-manganese oxide-bound (OX) Mn fraction, and relative abundance of Fe(III)-reducing bacteria, but it decreased OX-Cd and Mn availability in soil. Cadmium in rice tissues was positively correlated with the available Cd in soil. The results of subsequent adsorption tests demonstrated that CdO was the product of Cd adsorption by the nZVI aging products. Conversely, Mn2+ decreased the adsorption capacity of Cd-containing solutions. These results underscore the crucial role of both biotic and abiotic factors in undermining the stabilization of nZVI under continuous flooding conditions. This study offers novel insights into the regulation of nZVI-mediated Cd stabilization efficiency in conjunction with biological inhibitors and functional modification techniques. © 2024 Elsevier Ltd

关键词： Iron oxides

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Not All Extreme Droughts are Equal: The Impacts of Drought Patterns on Grassland Soil Nitrogen Mineralization

SSRN

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SSRN 2023年

作者： Shi, Yalong Xu, Chong Ke, Yuguang Chen, Jiale Gu, Qian Guo, Xin Wang, Hongqiang Yu, Qiang Wu, Honghui State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural Affairs Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China School of Grassland Science Beijing Forestry University Beijing100083 China

Grasslands are expected to experience increased frequency of both long-term chronic reductions in precipitation and short-term periods without precipitation. These two drought patterns may alter soil nitrogen (N) mineralization differently, while no study has assessed it. Here, we conducted an identical experiment with six sites in Eurasian steppe across aridity gradients to explore the effects of drought patterns on soil N mineralization. There were three treatments in each site, i.e., ambient precipitation (ambient), chronic drought -66% reduction in each precipitation event throughout the growing season, and intense drought - complete exclusion of every rain event for two months during the growing season. We found that chronic drought had a significantly greater impact on net N mineralization rate than intense drought, while there was no significant difference in the impact on inorganic N pools. In addition, the response ratio of soil nitrification rate and ammonium N concentration showed a trend of first increasing and then decreasing with the increase of aridity index, with the peak response occurring within the aridity index range of 0.45 to 0.55, while the response ratio of soil net ammonification and nitrate N decreased with the increase of aridity index. Overall, our study suggests that chronic drought may have more serious impacts on soil N mineralization than intense drought, and we should pay more attention to moderately arid and moist steppes that showed a higher sensitivity to these two extreme drought patterns. © 2023, The Authors. All rights reserved.

关键词： Drought

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Global Rice Multi-Class Segmentation Dataset (RiceSEG): A Comprehensive and Diverse High-Resolution RGB-Annotated Images for the Development and Benchmarking of Rice Segmentation Algorithms

arXiv

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arXiv 2025年

作者： Zhou, Junchi Wang, Haozhou Kato, Yoichiro Nampally, Tejasri Rajalakshmi, P. Balram, M. Katsura, Keisuke Lu, Hao Mu, Yue Yang, Wanneng Gao, Yangmingrui Xiao, Feng Chen, Hongtao Chen, Yuhao Li, Wenjuan Wang, Jingwen Yu, Fenghua Zhou, Jian Wang, Wensheng Hu, Xiaochun Yang, Yuanzhu Ding, Yanfeng Guo, Wei Liu, Shouyang Engineering Research Center of Plant Phenotyping Ministry of Education Jiangsu Collaborative Innovation Center for Modern Crop Production Academy for Advanced Interdisciplinary Studies Sanya Institute of Nanjing Agricultural University Nanjing Agricultural University Nanjing China Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan Department of Artificial Intelligence Indian Institute of Technology Hyderabad India Department of Electrical Engineering Indian Institute of Technology Hyderabad India Institute of Biotechnology Professor Jayashankar Telangana Agricultural State University Hyderabad India Graduate School of Agriculture Kyoto University Kyoto Japan Key Laboratory of Image Processing and Intelligent Control School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan China National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research Hubei Key Laboratory of Agricultural Bioinformatics Huazhong Agricultural University Wuhan China State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China the Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China Center for Geospatial Information Shenzhen Institutes of Advanced Technology Chinese Academy of Science Shenzhen China School of Information and Electrical Engineering Shenyang Agricultural University Shenyang China Rice Research Institute Jilin Academy of Agricultural Sciences Changchun China Institute of Crop Sciences National Key Facility for Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences Beijing China Yuan Long Ping High-Tech Agriculture Co. Ltd. Changsha China

Developing computer vision–based rice phenotyping techniques is crucial for precision field management and accelerating breeding, thereby continuously advancing rice production. Among phenotyping tasks, distinguishing image components is a key prerequisite for characterizing plant growth and development at the organ scale, enabling deeper insights into eco-physiological processes. However, due to the fine structure of rice organs and complex illumination within the canopy, this task remains highly challenging, underscoring the need for a high-quality training dataset. Such datasets are scarce, both due to a lack of large, representative collections of rice field images and the time-intensive nature of annotation. To address this gap, we established the first comprehensive multi-class rice semantic segmentation dataset, RiceSEG. We gathered nearly 50,000 high-resolution, ground-based images from five major rice-growing countries (china, Japan, India, the Philippines, and Tanzania), encompassing over 6,000 genotypes across all growth stages. From these original images, 3,078 representative samples were selected and annotated with six classes (background, green vegetation, senescent vegetation, panicle, weeds, and duckweed) to form the RiceSEG dataset. Notably, the sub-dataset from china spans all major genotypes and rice-growing environments from the northeast to the south. Both state-of-the-art convolutional neural networks and transformer-based semantic segmentation models were used as baselines. While these models perform reasonably well in segmenting background and green vegetation, they face difficulties during the reproductive stage, when canopy structures are more complex and multiple classes are involved. These findings highlight the importance of our dataset for developing specialized segmentation models for rice and other crops. The RiceSEG dataset is publicly available at ***. © 2025, CC BY.

关键词： Semantic Segmentation

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Vegetation Restoration Increases the Contribution of Microbial Necromass to Soil Organic Carbon

SSRN

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SSRN 2024年

作者： Sun, Tingting Zhang, Tian Zhou, Jie Wang, Zhufeng Fu, Yue Huang, Zhigang College of Agronomy Guangxi University Guangxi Nanning China Key Laboratory of Agro-Environment and Agro-Product Safety Guangxi University Nanning530005 China College of Agriculture Nanjing Agricultural University Nanjing210095 China State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China the Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China

Microbial necromass is an essential component of soil organic carbon (SOC) and increases with vegetation restoration, accounting for more than 50% of SOC across ecosystems. Yet, the quantitative evaluation of the vegetation restoration effects on microbial necromass accumulation and its contributions to SOC pool on large scales remains unclear. Here, we conducted a global analysis of 554-paired studies to quantitatively evaluate microbial necromass and its contributions to SOC in response to vegetation restoration. On an average, microbial necromass increased by 27% with restoration, and the increasing magnitudes of microbial necromass were pronounced in natural restoration by 36%, grassland soils by 35%, and long-term (>20 years) restoration by 30% because of the increased microbial biomass. The contributions of microbial necromass to the SOC pool increased by 7% with vegetation restoration, and fungal necromass contributed more to SOC than bacterial necromass. Greater increase in microbial necromass accumulation coefficient (the ratios of microbial necromass to living microbial biomass) after restoration were present in low temperature and precipitation, coarse-textured soils, low soil nitrogen (N) availability (soil C/N ratio>15), and topsoil possibly because of the low necromass decomposition. The restoration effects on microbial necromass were primarily related to soil clay content, the changes in soil microbial biomass and C/N ratio, indicating the dominance of soil conditions in explaining the variations of microbial necromass accumulation (30%-76%). These finding emphasize the importance of soil conditions, and the restoration effects on microbial necromass and its contributions to SOC are site-specific. Collectively, long-term restoration increases microbial necromass accumulation and contributions to SOC sequestration, especially for fungal development in resource-poor environments. © 2024, The Authors. All rights reserved.

关键词： Restoration

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landscape Optimization of Agricultural Production and Ecological Benefits Trade-Offs Based on Production Possibility Frontier

SSRN

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SSRN 2024年

作者： Liu, Qinghua Sun, Xiao Huang, Qingxu Fang, Guangji Ren, Yuhan Wang, Chenrui Sun, Jing Yang, Peng State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China The Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China Beijing Normal University Beijing100875 China School of Natural Resources Faculty of Geographical Science Beijing Normal University Beijing100875 China School of Land Science and Technology China University of Geosciences Beijing100083 China

There are severe conflicts between agricultural production and ecological benefits, and how to explore the critical configurations of agricultural landscapes and natural habitats to clarify sustainable (safety) scenarios remains unclear. Thus, this study explored a transferable approach to generating the production possibility frontiers of trade-offs between agricultural production and ecological benefits (biodiversity, carbon sink, and water consumption) under unconstrained, ecological constraint, and agricultural and ecological constraint scenarios, and identified the threshold and safety area for landscape optimization in the Beijing–Tianjin–Hebei (BTH) region of china. When reaching the Pareto optimality of trade-off frontiers, the grain yield and biodiversity increased by 10%–17%, the grain yield and carbon sink increased by 15%–48%, and the grain yield and water consumption improved by 4%–25%. The thresholds revealed that natural habitats occupying 20%–40% (with agricultural landscapes occupying 40%–60%) of the BTH region was a critical state, and the region would become unsustainable below this range. This study highlights that landscape optimization will promote landscape multifunctionality and provides quantitative landscape optimization thresholds and safety boundaries for improving agricultural production and ecological benefits. © 2024, The Authors. All rights reserved.

关键词： Biodiversity

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Polyvinyl Chloride Microplastics Disseminate Antibiotic Resistance Genes in Chinese Soil: A Metagenomic Analysis

SSRN

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SSRN 2024年

作者： Zhao, Shuwen Zhang, Qianru Huang, Qilan Zhang, Chuchen Li, Hongna Siddique, Kadambot H.M. State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing100081 China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing100081 China The UWA Institute of Agriculture The University of Western Australia PerthWA6001 Australia

The widespread prevalence of microplastics (MPs) in the environment poses concerns as they are vectors of antibiotic resistance genes (ARGs). The relationships between antibiotic resistomes and MPs remain unexplored in soil which was considered as the reservoirs of MPs and ARGs. This study investigated the effects of polyvinyl chloride (PVC) MPs on soil bacterial communities and ARG abundance which soil samples sourced from 20 provinces across china. We found that PVC significantly influences soil bacterial community structure and ARG abundance. Structural equation modeling revealed that PVC alters soil characteristics, ultimately affecting soil bacterial communities, including ARG-containing bacterial hosts, and the relative abundance of ARGs. This study enhances our understanding of how MPs influence the proliferation and hosts of ARGs within diverse soil environments, offering crucial insights for future strategies in plastic management and disposal. © 2024, The Authors. All rights reserved.

关键词： Polyvinyl chlorides

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