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Patterns and drivers of soil organic carbon fractions and persistence in coastal wetlands of China

CATENA 2025年 257卷

作者： Lele Wu Zhaoliang Song Xinyu Zhang Yuan Guo Yidong Wang Changxun Yu Yunying Fang Iain P. Hartley Ji Chen Shaopan Xia Xiaoguang Ouyang Wenhai Mi Ding He Cong-Qiang Liu Hailong Wang Institute of Surface-Earth System Science School of Earth System Science Tianjin University Tianjin 300072 China Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim Tianjin University Tianjin China Haihe Laboratory of Sustainable Chemical Transformations Tianjin China Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal University Tianjin 300387 China Department of Biology and Environmental Science Linnaeus University Kalmar Sweden Australian Rivers Institute School of Environment and Science Griffith University Nathan 4111 Australia Geography College of Life and Environmental Sciences University of Exeter Exeter UK State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an 710061 China Department of Agroecology Aarhus University 8830 Tjele Denmark Institute of Resource Ecosystem and Environment of Agriculture College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing Jiangsu 210095 China Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) Guangzhou 511458 China Research Centre of Ecology & Environment for Coastal Area and Deep Sea Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) Guangzhou 511458 China Guangdong Basic Research Center of Excellence for Ecological Security and Green Development School of Ecology Environment and Resources Guangdong University of Technology Guangzhou 510006 China College of Environmental Science and Engineering Yangzhou University Yangzhou 225127 China Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau The Hong Kong University of Science and Technology Hong Kong China School of Environmental and Chemical Engineering Foshan University Foshan China Guangdong Provincial Key Laboratory of Integrated Agro-environmental Po

Coastal wetlands have disproportionately high carbon (C) sequestration rates and long-term sustainable C sequestration capacity, contributing to the mitigation of global climate change. Previous studies have mainly focused on the assessment of bulk soil organic C (SOC) in coastal wetlands, neglecting the form in which C is stored, its stability and driving factors, which hinders our in-depth understanding of C sequestration capacity and underlying mechanisms. In this study, we sampled 157 plots across coastal wetlands in China, covering tropical, subtropical, and temperate climates to gain a detailed understanding of the distribution, stability, and control mechanisms of SOC fractions. Our results showed that the SOC in the topsoil (0–10 cm) was co-dominated by mineral-associated organic C (MAOC) and particulate organic C (POC) in mudflats, temperate and subtropical salt marshes, and subtropical mangroves, but not in tropical mangroves. The content of dissolved organic C (DOC, 0.12 ± 0.08 g kg −1 ) was only 1.15 ± 0.06 % of bulk SOC. The POC became more dominant relative to MAOC and DOC as SOC content increased. We found that soil properties (total nitrogen, bulk density, and particle size, etc), were the primary explanatory variables for SOC fractions content and persistence, accounting for 58 %, 64 %, 38 %, 53 %, and 34 % of total variation in MAOC, POC, DOC, MAOC/SOC, and C/N, respectively. Although climate and vegetation factors did not directly control C contents in soil matrix and persistence, they interacted strongly with edaphic variables explaining 8 %, 16 %, 11 %, 12 %, and 13 % of the total variation in the above variables, respectively. Our results suggest that the increase in SOC, especially POC, reduced its persistence, so the implementation of C management strategies in coastal wetlands should integrate SOC sequestration and stability to maximize benefits.

关键词： Climate change Coastal wetlands Dissolved organic carbon Mineral-associated organic carbon Particulate organic carbon Soil organic carbon stabilization

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Modulating Metal-Nitrogen Coupling in Anti-Perovskite Nitride via Cation Doping for Efficient Reduction of Nitrate to Ammonia

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Angewandte Chemie 2023年第38期135卷

作者： Zhiheng Gong Xuepeng Xiang Wenye Zhong Chenghao Jia Peiyan Chen Prof. Nian Zhang Prof. Shijun Zhao Prof. Weizhen Liu Prof. Yan Chen Prof. Zhang Lin Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling School of Environment and Energy South China University of Technology Guangzhou 510006 P. R. China Contribution: Conceptualization (equal) Data curation (lead) Investigation (lead) Methodology (lead) Visualization (lead) Writing - original draft (lead) Writing - review & editing (equal) Department of Mechanical Engineering City University of Hong Kong Hong Kong 999077 P. R. China Contribution: Data curation (equal) Formal analysis (equal) Software (lead) Visualization (equal) Writing - review & editing (equal) Contribution: Formal analysis (supporting) Investigation (supporting) Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 P. R. China Contribution: Resources (equal) Supervision (equal) Contribution: Resources (equal) Software (equal) Contribution: Supervision (equal) Validation (equal) Visualization (equal) Writing - review & editing (supporting) Contribution: Conceptualization (lead) Funding acquisition (lead) Resources (lead) Supervision (lead) Validation (lead) Writing - review & editing (lead) Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution School of Metallurgy and Environment Central South University Changsha 410083 P. R. China Contribution: Conceptualization (equal) Resources (equal) Supervision (equal)

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Engineering Bismuth–Tin Interface in Bimetallic Aerogel with a 3D Porous Structure for Highly Selective Electrocatalytic CO2Reduction to HCOOH

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Angewandte Chemie 2021年第22期133卷

作者： Dr. Zexing Wu Hengbo Wu Prof. Weiquan Cai Prof. Zhenhai Wen Prof. Baohua Jia Prof. Lei Wang Prof. Wei Jin Prof. Tianyi Ma State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular Engineering Qingdao University of Science & Technology 53 Zhengzhou Road Qingdao 266042 P. R. China State Key Laboratory of Pollution Control and Resources Reuse School of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai 200092 China School of chemistry and chemical engineering Guangzhou University 230 Guangzhou University City Outer Ring Road Guangzhou 510006 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Centre for Translational Atomaterials Faculty of Science Engineering and Technology Swinburne University of Technology John Street Hawthorn VIC 3122 Australia

Electrochemical reduction of CO 2 (CO 2 RR) into valuable hydrocarbons is appealing in alleviating the excessive CO 2 level. We present the very first utilization of metallic bismuth–tin (Bi-Sn) aerogel for CO 2 RR with selective HCOOH production. A non-precious bimetallic aerogel of Bi-Sn is readily prepared at ambient temperature, which exhibits 3D morphology with interconnected channels, abundant interfaces and a hydrophilic surface. Superior to Bi and Sn, the Bi-Sn aerogel exposes more active sites and it has favorable mass transfer properties, which endow it with a high FE HCOOH of 93.9 %. Moreover, the Bi-Sn aerogel achieves a FE HCOOH of ca. 90 % that was maintained for 10 h in a flow battery. In situ ATR-FTIR measurements confirmed that the formation of *HCOO is the rate-determining step toward formic acid generation. DFT demonstrated the coexistence of Bi and Sn optimized the energy barrier for the production of HCOOH, thereby improving the catalytic activity.

关键词： aerogels bismuth formic acid tin

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Strategy to improve gold nanoparticles loading efficiency on defect-free high silica ZSM-5 zeolite for the reduction of nitrophenols

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Chemosphere 2020年 256卷 127083页

作者： Jiangfan He Cui Lai Lei Qin Bisheng Li Shiyu Liu Lingjie Jiao Yukui Fu Danlian Huang Ling Li Mingming Zhang Xigui Liu Huan Yi Liang Chen Zhongwu Li College of Environmental Science and Engineering Hunan University Changsha Hunan 410082 PR China Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha Hunan 410082 PR China. Key Laboratory of Environmental Biology and Pollution Control Hunan University Ministry of Education Changsha Hunan 410082 PR China. Electronic address: laicui@***. Faculty of Life Science and Technology Central South University of Forestry and Technology Changsha Hunan 410004 PR China. College of Resources and Environmental Sciences Hunan Normal University Changsha Hunan 410082 PR China.

Catalytic reduction of toxic and aqueous stable nitrophenols by gold nanoparticles (Au NPs) is hot issue due to the serious environmental pollution in recent years. But the expensive price and poor recycling performance of Au NPs limit its further application. Defect-free high silica zeolite is suitable support for Au NPs due to its cheaper price, higher stability and stronger adsorbability, but the low alumina content and defect sites usually lead to poor Au NPs loading efficiency. Herein, we reported the improved Au NPs loading efficiency on defect-free high silica ZSM-5 zeolite through the additional surface fluffy structure. The fluffy structure was created through the addition of multi-walled carbon nanotubes (MWCNTs) and ethanol into synthesis gel. Highly dispersed ca. 4 nm Au NPs on zeolite surface are prepared by the green enhanced sol-gel immobilization method. The Au NPs loading efficiency on conventional ZSM-5 zeolite is 10.7%, in contrast, this result can arrive to 82.6% on fluffy structure ZSM-5 zeolite. The fluffy structure ZSM-5 zeolite and Au NPs nanocomposites show higher efficiency than traditional Au/ZSM-5 nanocomposites towards catalytic reduction of nitrophenols. Additionally, the experiments with different affecting factors (MWCNTs dosage, aging time, catalysts dosage, pH, initial 4-NP concentration, storage time and recycling times) were carried out to test general applicability of the nanocomposites. And the degradation of nitrophenols experiment was operated to explore the catalytic performance of the prepared nanocomposites in further environmental application. The detailed possible relationship between zeolite with fluffy structure and Au NPs is also proposed in the paper.

关键词： Fluffy structure Gold nanoparticles Heterogeneous catalysis Reduction of nitrophenols ZSM-5 zeolite

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Repair capacity of perennial ryegrass (Lolium perenne L.) based on arbuscular mycorrhizal fungi on the in uranium contaminated soil

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IOP Conference Series: Earth and Environmental Science 2019年第3期330卷

作者： Zhang Shi-qi Lv Yi-jin Zhang Yu Peng Xiaoyong Liu Yingjiu Rong Lishan Hunan Provincial Key Laboratory of Pollution Control and Resources Technology University of South China Hengyang 421001 P. R. China

This study is to research effects of arbuscular mycorrhizal fungi (AMF) on the repair capacity of perennial ryegrass (Lolium perenne L.) in the uranium-containing soils. Perennial ryegrass plants were harvested 60 days after sowing in soils. Photosynthetic pigments, soluble proteins, and malondialdehyde were determined by ethanol extraction method, Coomassie brilliant blue method, and thiobarbituric acid method, respectively. Activities of alkaline phosphatase and succinate dehydrogenase were also determined. And, cellular and subcellular distributions of uranium in plant epidermal cells were observed with Hitachi H-7650 transmission electron microscope. AMF influents photosynthetic pigment levels of perennial ryegrass. AMF increases the soluble protein levels in perennial ryegrass and represses the uranium-induced increase of malondialdehyde levels in perennial ryegrass. It suggested that AMF can effectively increase the ability of perennial ryegrass on repairing the uranium-related soil contamination.

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Corrigendum to “Highly selective adsorption on monolayer MoS 2 doped with Pt, Ag, Au and Pd and effect of strain engineering: A DFT study” [Sens. Actuators: A Phys. (2021) 112637]

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Sensors and Actuators A: Physical 2021年 324卷

作者： Zhaoyan Li Da’an Zhou Xiangke Jiao School of Biological and Chemical Engineering Nanyang Institute of Technology Nanyang 473004 China School of Mechanical & Electrical Engineering Shandong Chemical Industry Vocational College Weifang 262737 China School of Resources Environmental Science and Engineering Hubei University of Science and Technology Xianning 437100 China College of Civil Engineering Hunan University Changsha 410082 China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and Technology Wuhan 430081 China

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Modeling and process design of municipal solid waste pyrolysis and gasification with a fixed-bed chamber

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IOP Conference Series. Earth and Environmental Science 2019年第2期332卷

作者： Li, Erping Chen Haoyun Yu, Zhiyuan Hu, Qing Cai Jinling Qiu Yaqun Hunan Research Academy of Environmental Sciences (Hunan Provincial Key Laboratory of Water Pollution Control Technology) Changsha Hunan 410002 China Hunan Research Academy of Environmental Sciences (Hunan Provincial Key Laboratory of Water Pollution Control Technology) Changsha Hunan 410002 China Central South University of Forestry and Technology Changsha Hunan 410004 China

To design the process of municipal solid waste (MSW) pyrolysis and gasification in a fixed-bed more veritably and effectively, the modeling of this process was proposed based on Gibbs energy minimization by using the Aspen plus software. The proposed model was used to predict and analyze the influences of operating parameters including gasification temperature, air-fuel ratio and steam/MSW ratio on the composition, lower heating value (LHV), carbon conversion efficiency (CCE), heat conversion efficiency (HCE)and flammable gas contents (FGC) of syngas. The results indicate that there is a good agreement between the experimental data and the simulated data obtained using this model. The predicted appropriate gasification temperature was around 900°C while the suitable air-fuel ratio was approximately 0.4, and the beast steam/MSW ratio was around 0.4. A novel configuration of atmospheric fixed-bed chamber is designed for the municipal solid waste pyrolysis and gasification process based on the experimental and simulated results. The designed configuration was feasible with achieved heat balance of the system.

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Modulating the Reaction Configuration by Breaking the Structural Symmetry of Active Sites for Efficient Photocatalytic Reduction of Low-concentration CO2

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Angewandte Chemie 2023年第42期135卷

作者： Wenyuan Lyu Dr. Yang Liu Jingyi Zhou Datong Chen Dr. Xin Zhao Dr. Ruiqi Fang Dr. Fengliang Wang Prof. Yingwei Li School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China Contribution: Data curation (lead) Formal analysis (lead) Investigation (lead) Methodology (lead) Writing - original draft (equal) Writing - review & editing (equal) Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming Guangdong 525000 China Contribution: Methodology (equal) Software (lead) Contribution: Formal analysis (equal) Investigation (equal) Contribution: Formal analysis (supporting) Investigation (equal) Contribution: Formal analysis (supporting) Contribution: Formal analysis (equal) Funding acquisition (equal) Investigation (equal) Methodology (equal) Supervision (lead) Visualization (equal) Writing - original draft (equal) Writing - review & editing (lead) State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China Contribution: Conceptualization (equal) Funding acquisition (lead) Project administration (lead) Resources (lead) Supervision (equal) Writing - review & editing (equal)

Photocatalytic conversion of low-concentration CO 2 is considered as a promising way to simultaneously mitigate the environmental and energy issues. However, the weak CO 2 adsorption and tough CO 2 activation process seriously compromise the CO production, due to the chemical inertness of CO 2 molecule and the formed fragile metal-C/O bond. Herein, we designed and fabricated oxygen vacancy contained Co 3 O 4 hollow nanoparticles on ordered macroporous N-doped carbon framework (Vo−HCo 3 O 4 /OMNC) towards photoreduction of low-concentration CO 2 . In situ spectra and ab initio molecular dynamics simulations reveal that the constructed oxygen vacancy is able to break the local structural symmetry of Co−O−Co sites. The formation of asymmetric active site switches the CO 2 configuration from a single-site linear model to a multiple-sites bending one with a highly stable configuration, enhancing the binding and structural polarization of CO 2 molecules. As a result, Vo−HCo 3 O 4 /OMNC shows unprecedent activity in the photocatalytic conversion of low-concentration CO 2 (10 % CO 2 /Ar) under laboratory light source or even natural sunlight, affording a syngas yield of 337.8 or 95.2 mmol g −1 h −1 , respectively, with an apparent quantum yield up to 4.2 %.

关键词： CO2 Reduction Metal–Organic Frameworks Oxygen Vacancy Photocatalysis Synthesis Gas

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Conventional triaxial compression on hollow cylinders of sandstone with various fillings: Relationship of surrounding rock with support

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Journal of Central South University 2018年第8期25卷 1976-1986页

作者： WU Qiu-hong LI Xi-bing TAO Ming ZHAO Fu-jun WENG Lei DONG Long-jun School of Resources and Safety Engineering Central South UniversityChangsha 410083China Work Safety Key Laboratory on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan University of Science and TechnologyXiangtan 411201China Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines Hunan University of Science and TechnologyXiangtan 411201China School of Resources Environment and Safety EngineeringHunan University of Science and TechnologyXiangtan 411201China School of Civil Engineering Wuhan UniversityWuhan 430072China

The interaction of surrounding rock with a support system in deep underground tunnels has attracted extensive interest from ***,the effect of high axial stress on tunnel stability has not been fully *** this study,compression tests with and without confining pressure were conducted on solid specimens and hollow cylinder specimens filled with aluminium,lead,and polymethyl methacrylate(PMMA)to investigate the strength,deformation and failure characteristics of circular roadways subjected to high axial *** influence of the three-dimensional stress on the surrounding rock supported with different stiffness was *** results indicate that the strength and peak strain of hollow cylinders filled with PMMA are higher than those of hollow cylinders filled with aluminium or lead,indicating that flexible retaining is beneficial for roadway *** results obtained in this paper can contribute to better understanding the support failure of a buried roadway subjected to high axial stress and thus to analyzing and evaluating roadway stability.

关键词： mechanical properties hollow cylinder flexible retaining axial stress support stiffness

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Combination of Wastewater Treatment Measures and Landscape Ecological Design in Traditional Villages Based on Sustainability Theory: A Case Study of Miao Village in Xiangxi, China

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IOP Conference Series: Earth and Environmental Science 2020年第1期526卷

作者： Yuanqiang Tang Yuanxing Tang Mengmiao Zhang Jianmin Zhao Yunguo Liu Shaoqiu Long Can Xiao Yu Chen Shaoyao He Chunping Yang College of Environmental Science and Engineering Hunan University Changsha 410082 PR China Key Laboratory of Environmental Biology and Pollution Control (Hunan University) Ministry of Education Changsha 410082 PR China Secondary School of Industrial and Commercial & Vocational of Yongzhou Hunan Yongzhou 425006 PR China School of Architecture Hunan University Changsha 410082 PR China College of Natural Resources and Environment of South China Agricultural University Guangdong Guangzhou 510642 PR China Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming Guangdong 525000 China

The aim of protecting traditional villages is to maintain the population; thus, these villages must be suitable for living. A prerequisite for the liveability of traditional villages is treatment of point and non-point sources of pollution to improve the ecological value of the village. The combination of water pollution control measures and landscape design improves the aesthetic and ecological sustainability. This article takes China's fourth batch of traditional villages, Xiangxi Wengcao Miao Village, as an example. Interviews, field surveys and various discussions were conducted, and the study believes that by connecting the various sewage outlets, they are collected in the first, second and third levels. Treatment ponds (tanks) transformed curved rice fields into secondary treatment tanks and stabilised ponds. Native plants were classified before stable and treatment ponds were excavated. Submerged, floating and emergent plants were artificially planted in the water, and medicinal plants were cultivated around the pond and banks of the creek. These biomass plants are relatively large for the nutrition in the wastewater. Adsorption and digestion of the substance can not only reduce the direct discharge of sewage to downstream regions but also beautify the landscape of the sewage treatment facility.

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