检索结果-内蒙古大学图书馆

Responses of dissolved organic nitrogen to varied nitrogen deposition: A 16-year nitrogen-addition and cessation experiment in a subtropical forest

引用

Science of the Total Environment 2025年 975卷 179284页

作者： Yang, Dongxing Xie, Dani Mulder, Jan Yu, Qian Huang, Yongmei Duan, Lei State Key Laboratory of Regional Environment and Sustainability School of Environment Tsinghua University Beijing100084 China Shanxi Key Laboratory of Land Consolidation School of Land Engineering Chang'an University Shanxi 710064 China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Box 5003 ÅsNO-1432 Norway State Key Laboratory of Pollution Control and Resource Reuse and School of the Environment Nanjing University 163 Xian in Ave. Jiangsu Nanjing210023 China Faculty of Geographical Science Beijing Normal University Beijing100875 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University Beijing100084 China

The leaching of dissolved organic nitrogen (DON) signals N loss in forest ecosystems, connecting terrestrial and aquatic ecosystems. The response of DON to varied inorganic N (Nin) deposition remains unclear. A 16-year continuous monitoring of DON in throughfall, soil water, and stream water was conducted under a field N manipulation (10-year Nin addition and subsequent cessation of Nin addition) in a subtropical forest in China. Under reference conditions, the average organic N (Nor) deposition was 23.0 ± 4.9 kg N ha−1 yr−1, with approximately one-third leaching at a soil depth of 30 cm, a value that was higher than those reported for temperate forests. Over a 16-year period, DON concentrations tended to increase in throughfall, soil solutions and stream water. The long-term increase in DON concentrations in soil solutions was primarily driven by increasing Nor deposition and indirectly influenced by decreasing acid deposition. Due to a doubling of monthly Nin input, either as sodium nitrate or as ammonium nitrate, the soil DON leaching doubled, causing the soil to transition from a DON sink to a DON source. After Nin addition ceased, the DON leaching returned to natural levels, and the soil reverted to being a DON sink. This study reveals the importance of Nor deposition and decreasing acid deposition as drivers of long-term trends in DON concentrations in soil solutions, in addition to elucidating the response patterns of DON to increasing and decreasing Nin deposition. © 2025 Elsevier B.V.

关键词： Chronic nitrogen addition Dissolved organic nitrogen Nitrogen deposition Soil acidification recovery Water chemistry

来源：评论

学校读者我要写书评

暂无评论

Removal Behavior of Typical Micropollutants in Membrane Bioreactor Process by Different Temperature

SSRN

引用

SSRN 2023年

作者： Wang, Qiaoying Zheng, Wenjia Wang, Yan Zhang, Tong Zhou, Zhen Wu, Zhichao State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security College of Environmental Science and Engineering Tongji University Shanghai200092 China College of Environmental and Chemical Engineering Shanghai Institute of Pollution Control and Ecological Security Shanghai University of Electric Power Shanghai200090 China

In this study, the removal efficiency and mechanism of 8 kinds of typical micropollutants by membrane bioreactor (MBR) at different temperatures (15, 25 and 35 °C) were investigated. MBR exhibited the high removal rate (> 85%) for 3 kinds of industrial synthetic organic micropollutants (i.e. bisphenol A (BPA), 4-tert-octylphenol (TB) and 4-n-nonylphenol (NP)) with similar functional groups, structures and high hydrophobicity (Log D > 3.2). However, the removal rates of ibuprofen (IBU), carbamazepine (CBZ) and sulfamethoxazole (SMX) with pharmaceutical activity showed great discrepancy (i.e. 93%, 14.2% and 29%, respectively), while that of pesticides (i.e. acetochlor (Ac) and 2,4-dichlorophenoxy acetic acid (2,4-D) were both lower than 10%. Operating temperature played a significant role in microbial growth and activities. High temperature (35 °C) led to a decreased removal efficiency for most of hydrophobic organic micropollutants, and was also not conducive for refractory CBZ due to the temperature *** lower temperature (15 °C), a large amount of exopolysaccharides and proteins were released by microorganisms, which caused the inhibited microbial activity, poor flocculation and sedimentation, resulting in the polysaccharide-type membrane fouling. It was proved that dominant microbial degradation and auxiliary adsorption were the main mechanisms for micropollutant removal in MBR system. Therefore, 25 °C was most conductive for micropollutant removal due to the high activity sludge so as to enhance microbial adsorption and degradation. © 2023, The Authors. All rights reserved.

关键词： Bioreactors

来源：评论

学校读者我要写书评

暂无评论

Citizen science meets eDNA:A new boom in research exploring urban wetland biodiversity

引用

Environmental Science and Ecotechnology 2023年第4期16卷 65-68页

作者： Haowen Zhang Jianghua Yang Lijuan Zhang Xueping Gu Xiaowei Zhang Nanjing Foreign Language School 30 East Beijing RoadXuanwu DistrictNanjing210008China State Key Laboratory of Pollution Control&Resource School of the EnvironmentNanjing UniversityNanjing University Xianlin Campus163 Xianlin AvenueNanjing210023China Jiangsu Province Ecology and Environment Protection Key Laboratory of Chemical Safety and Health Risk Nanjing210023China

Summary The biodiversity of urban wetlands provides crucial ecosystem services and contributes to cities'***,such ecosystems are threatened by multiple stressors,such as climate change,environmental pollution,and species *** participation in biodiversity and ecological conservation is becoming an increasingly well-developed and valued approach worldwide.

关键词： biodiversity ecosystems pollution

来源：评论

学校读者我要写书评

暂无评论

Enhanced Organic Contaminants Degradation Via Coupling Molybdenum Powder with Tripolyphosphate in Fe(Ⅱ)-Based Peroxymonosulfate Activation

SSRN

引用

SSRN 2023年

作者： Zhou, Zhengwei Ye, Guojie Zong, Yang Zhao, Zhenyu Xu, Longqian Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

To overcome the challenges of pH application range, slow cycling of Fe(III)/Fe(II) and low oxidant activation efficiency, we propose a strategy of combining molybdenum powder (Mo) cocatalyst with sodium tripolyphosphate (STPP) to accelerate peroxymonosulfate (PMS) activation and achieve efficient degradation of acetaminophen (ACT). The ACT degradation efficiency and rate were 99.7% and 0.065 min-1, respectively, which were significantly improved compared to the system without Mo due to the abundance of active sites of Mo that accelerate the dissolved Fe species complexed with STPP. Additionally, the degradation efficiency remained above 95%, and there was only a slight change in morphology after 5 cycles, demonstrating the excellent co-catalytic performance and reusability of Mo. The several oxidizing active substances (·OH, SO4·-, 1O2, Fe(Ⅳ)) were synergistically worked for ACT removal, which were investigated the origin and activation mechanism via multiple measures. Satisfactorily, the system exhibited desirable anti-jamming capability and superiority in the removal of various contaminants. ACT degradation intermediate products were measured and proposed three degradation pathways according to the results of Liquid chromatograph-mass spectrometer (LC-MS). The development of combining Mo and STPP for organic pollutant degradation is significant in broadening the application range of PMS-AOPs in environmental remediation. © 2023, The Authors. All rights reserved.

关键词： Degradation

来源：评论

学校读者我要写书评

暂无评论

Enhancing Efficient Reclaim of Phosphorus from Simulated Urine by Magnesium-Functionalized Biochar: Adsorption Behaviors, Molecular-Level Mechanistic Explanations and its Potential Application

SSRN

引用

SSRN 2023年

作者： Zhang, Lei Yang, Libin Chen, Jiabin Zhang, Yalei Zhou, Xuefei State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze Water Environment Ministry of Education Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China

Magnesium-functionalized Magnolia grandiflora Linn leaf-derived biochar (MBC) capable of efficiently reclaiming phosphorus from urine was synthesized by slow co-pyrolysis. Four adsorption kinetic and seven adsorption isotherm models were fitted to the batch adsorption and desorption experimental data, and it was found that pseudo-first-order kinetic model and multilayer model with saturation best described the phosphate-phosphorus (PO43-P) adsorption process by MBC. MBC and phosphorus-saturated MBC (P-MBC) were found to offer outstanding phosphorus adsorption and slow release properties, respectively. Based on material characterization, statistical physics, adsorption energy distribution and statistical thermodynamics, a multi-ionic, inclined orientation, entropy-driven spontaneous endothermic process of MBC on PO43-P was proposed, involving physicochemical interactions (porous filling, electrostatic attraction, ligand exchange and surface precipitation). Further, seed germination and early seedling growth experiments proved that P-MBC can be used as a slow-release fertilizer. Overall, MBC offers prospective applications as an efficient phosphorus adsorbent and then as a slow-release fertilizer. © 2023, The Authors. All rights reserved.

关键词： Magnesium

来源：评论

学校读者我要写书评

暂无评论

Rapid oxidation of black phosphorus induced by copper ions via promoting oxygen bonding and phosphate desorption

引用

National Science Open 2024年第5期3卷 100-113页

作者： Zhiyu Zhu Sha Yang Kun Lu Shipeng Dong Xiaoyan Sun Jieyin Zheng Shixiang Gao Wei Liu Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentChemistry and Biomedicine Innovation CenterNanjing UniversityNanjing 210093China Nano Structural Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310018China Nanjing Qixia District Hospital Nanjing 210046China Cambridge A-Level Centre Nanjing Jinling High SchoolNanjing 210005China

Black phosphorus(BP)has garnered significant interest in the field of biomedicine because of its exceptional *** oxidation product of BP phosphate has been utilized in numerous studies for the purpose of repairing bone defects and inducing apoptosis and autophagy in cancer ***,this process has drawbacks in terms of low yield and a slow rate of phosphate *** this study,we found that the oxidation rate of BP was increased 120-fold and the yield proportion of phosphate BP product was increased from 30%to 85%with the presence of less than 0.1%copper ions(Cu^(2+))in the reaction *** enhancement was attributed to the fact that the presence of Cu^(2+)promoted the bonding of oxygen on the BP surface and then the desorption of phosphate molecules from the BP *** study offers a novel perspective on the process of BP oxidation and introduces innovative concepts for the development of biological drug delivery systems capable of rapid decomposition.

关键词： black phosphorus reaction pathway reaction efficiency copper ions reaction mechanism

来源：评论

学校读者我要写书评

暂无评论

Evaluating City Road Dust Emission Characteristics with a Dynamic Method: A Case Study in Luoyang, China

SSRN

引用

SSRN 2023年

作者： Man, Hanyang Chen, Jiawei Cai, Wenying Lin, Laichang Chen, Xiaoduo Shao, Xiaohan Bao, Yumeng Zhu, Bo Xu, Lizhong College of Environmental and Resource Sciences Fujian Key Laboratory of Pollution Control & Resource Reuse Fujian Normal University Fuzhou350007 China Digital Fujian Internet-of-things Laboratory of Environmental Monitoring Fuzhou350007 China

Road dust constitutes a crucial source of non-exhaust particulate matter emissions in urban transportation systems. Conventional inventory methodologies, which depend on a limited set of dust loading test outcomes, fail to accurately represent the emission features of an entire road network. Consequently, this shortcoming precludes the generation of high spatiotemporal resolution emission inventories, which are essential for supporting refined emission control measures and health risk assessments. In the present study, we advance the AP-42 method by incorporating flux techniques to derive high-resolution emission factors for road networks. Traffic data, including speed, vehicle type, and vehicle counts, are obtained from traffic checkpoints at an hourly resolution and subsequently utilized to calculate the road dust inventory at a 100-meter spatial resolution. The Luoyang old city district serves as a case study for applying this novel approach, facilitating an examination of high spatiotemporal resolution emission features such as road emission intensity and bimodal temporal fluctuations. Through emission hotspot analysis, we discovered that 7% of the road length contributes to a substantial 40% of total road dust emissions. Based on these insights, we propose more effective road dust control strategies tailored to address the identified emission hotspots. © 2023, The Authors. All rights reserved.

关键词： Risk assessment

来源：评论

学校读者我要写书评

暂无评论

Pilot-Scale Study on an Advanced Fe-Cu Process for Refractory Wastewater Pretreatment

SSRN

引用

SSRN 2023年

作者： Fan, Jin-Hong Yao, Zhen-Long Wu, De-Li Liu, Xia Ma, Lu-Ming State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Due to the extreme pH, high color, and poor biodegradability of refractory wastewater, it has combined severe impacts on biological treatment. Thus, an advanced Fe-Cu process with redox reaction and spontaneous coagulation was investigated and applied for pilot-scale (wastewater flow rate of 2000 m3·day-1) pretreatment of separately discharged acidic chemicals and alkaline dyeing wastewater. The advanced Fe-Cu process had five functions: (1) increase the pH of chemical wastewater to 5.0 and above with influent pH around 2.0;(2) transform refractory organics of the chemical wastewater with 10.0% chemical oxygen demand (COD) and 30.8% color removal, resulting in the enhanced ratio of biological oxygen demand after five days (BOD5) to COD (B/C) from 0.21 to 0.38;(3) neutralize pH of the pretreated chemical wastewater for coagulation application with the alkaline dyeing wastewater to avoid alkaline chemical adding;(4) achieve nascent Fe(II) concentrations of average 925.6 mg∙L-1 by Fe-Cu internal electrolysis for mixed wastewater coagulation that removes an average of 70.3% color, 49.5% COD;(5) obtain COD removal and B/C enhancement that are more efficient than FeSO4∙7H2O coagulation while avoiding secondary pollution. The green process provides an effective and easy-implemented solution for separately discharged acidic and alkaline refractory wastewater pretreatment. © 2023, The Authors. All rights reserved.

关键词： Biodegradability

来源：评论

学校读者我要写书评

暂无评论

The Divergency of Microbiological Influenced Corrosion for Diverse Pipe Materials in the Drinking Water Distribution System

SSRN

引用

SSRN 2023年

作者： Yu, Haitao Li, Weiying Zhang, Wei Sun, Shengxin Song, Xin Zhang, Guosheng College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Tongji University China

Microbiological influenced corrosion (MIC) was prevalent in the water supply industry, especially in drinking water distribution system (DWDS) where ferrous materials are the main component. The MIC behaviors for four popular pipe materials (304 stainless steel, 316 stainless steel, Q235 carbon steel, and nodular cast iron) were studied by the dynamic water supply network simulation in the paper. The biomass densities of surface coupons in the experimental period were ranked as follows: nodular cast iron (20562 cells/mm2, ICC) > Q235 carbon steel (8697cells/mm2, ICC) > 316 stainless steel (6350 cells/mm2, ICC) > 304 stainless steel (5520 cells/mm2, ICC). Microbial community structure was mainly influenced by environmental factors, in especial the pipe materials significantly impacted dominant genera inhabited on experimental materials, among which the 316 stainless steel showed the best biostability. Moreover, the profile of polarization resistance and corrosion current exhibited a similar variation tendency, which increased in the first 30 days and then decreased later. The maximum corrosion current of each material was 2.10 × 10-4 A (304SS), 2.70 × 10-4 A (316SS), 2.58 × 10-4 A (Q235 carbon steel), and 1.30 × 10-4 A (nodular cast iron). SEM and XRD results confirmed that the surficial porous corrosion layer controlled the diffusion process of iron corrosion where β-FeOOH and γ-FeOOH were the main components of the corrosion product. Overall, the results of community diversity, electrochemical parameters, and corrosion layer structure showed that 316 stainless steel possessed the best biological corrosion resistance among the four kinds of pipes. © 2023, The Authors. All rights reserved.

关键词： Potable water

来源：评论

学校读者我要写书评

暂无评论

Recent progress of radionuclides separation by porous materials

引用

Science China Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long Yu Long Chen Cheng Chen Li Wang Fenglei Liu Yun Liao Peng Zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang Lijian Ma Feng Luo Yunhai Liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China School of Life Science Shaoxing UniversityShaoxing 312000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China College of Chemistry Sichuan UniversityChengdu 610064China School of Chemistry and Materials Science East China University of TechnologyNanchang 330013China School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China State Key Laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental SafetySichuan Civil-military Integration InstituteSchool of National Defence&Nuclear Science and TechnologySouthwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Marine Resource Utilization in South China Sea Collaborative Innovation Center of Marine Science and TechnologyHainan UniversityHaikou 570228China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China Department of Chemistry University of North TexasDentonTX 76201USA

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：