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SSRN 2022年

作者： Liu, Yang Shi, Lin Zhang, Di Wang, Jing He, Liping Niu, Xuekui Pan, Bo Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection College of Resources and Environment Linyi University Linyi276005 China Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming650500 China Yunnan Academy of Ecological Environment Sciences Kunming650034 China

The evaluation of heavy metal pollution in farmland soil is of great significance for sustainable agriculture management. However, debate on the primary pollution migration pathways to crops has greatly retarded remediation strategies. Hence, the flux of heavy metals should be identified with precision for targeted pollution control. In this study, a catchment downstream of a metal mining area in Yunnan Province was selected for investigation of Cd pollution in the topsoil of farmlands, including the input and output fluxes in different environmental media. The results showed that Cd concentrations exceeded the risk screening value in 67.8% of the farmland soil samples. Irrigation was the main input source of Cd to soil, accounting for more than 75% of the total input fluxes, in which the contribution of dissolved Cd in water was 1–2 orders of magnitude higher than that of Cd adsorbed on suspension particles. Crop harvesting, surface runoff, and leaching were the main Cd output pathways from this area. Cd concentration in the studied area was also dynamically predicted in 2050 under different scenarios. The prediction showed that Cd in farmland soil in the study area would be in a cumulative state in the following years. Straw removing could significantly reduce Cd accumulation in farmland soil. Thus, the substantial increase of crop yield in the future would benefit Cd output flux through crop harvesting. This work will guide decision-making for the establishment of targeted remediation strategies for Cd pollution in farmland soil. © 2022, The Authors. All rights reserved.

关键词： Irrigation

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Unraveling the Atomic-Level Vacancy Modulation in Cu9S5 for NIR-Driven Efficient Inhibition of Drug-Resistant Bacteria: key Role of Cu Vacancy Position

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SSRN 2022年

作者： Sun, Jingyu Wen, Jinghong Mo, Shudi Wang, Jianling Zhang, Ze Yang, Yang Wang, Guichang Liu, Jiandang Yu, Qilin Liu, Mingyang Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin300350 China College of Chemistry and Chemical Engineering Liaocheng University Liaocheng252059 China Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education The Tianjin key Lab and Molecule-based Material Chemistry College of Chemistry Nankai University Tianjin300071 China Anhui Hefei230026 China Key Laboratory of Molecular Microbiology and Technology Ministry of Education College of Life Sciences Nankai University Tianjin300071 China

Cu9S5 possesses high hole concentration and potential superior electrical conductivity as a novel p-type semiconductor, whose biological applications remain largely unexploited. Encouraged by our recent work that Cu9S5 has enzyme-like antibacterial activity in the absence of light, which may further enhance the near infrared (NIR) antibacterial performance. Moreover, vacancy engineering can modulate the electronic structure of the nanomaterials and thus optimize their photocatalytic antibacterial activities. Here, we designed two different atomic arrangements with same VCuSCu vacancies of Cu9S5 nanomaterials (CSC-4 and CSC-3) determined by positron annihilation lifetime spectroscopy (PALS). Aiming at CSC-4 and CSC-3 as a model system, for the first time, we investigated the key role of different copper (Cu) vacancies positions in vacancy engineering toward optimizing the photocatalytic antibacterial properties of the nanomaterials. Combined with the experimental and theoretical approach, CSC-3 exhibited stronger absorption of surface adsorbate, higher separation of photogenerated charge carriers, and lower reaction active energy than those of CSC-4, leading to the generation of abundant ·OH for attaining rapid drug-resistant bacteria killed and wound healed under NIR light irradiation. This work provided a novel insight for the effective inhibition of drug-resistant bacteria infection via vacancy engineering at the atomic-level modulation. © 2022, The Authors. All rights reserved.

关键词： Electronic structure

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Cadmium isotope compositions of Fe-Mn nodules and surrounding soils: Implications for tracing Cd sources

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Fundamental Research 2021年第3期1卷 269-276页

作者： Ting Gao Yuhui Liu Yafei Xia Jian-Ming Zhu Zhengrong Wang Meng Qi Yizhang Liu Zengping Ning Qiqi Wu Wenpo Xu Chengshuai Liu State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Department of Earth&Atmospheric Sciences City College of New YorkCUNYNew York 10031United States 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 ManagementInstitute of Eco-environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China CAS Center for Excellence in Quaternary Science and Global Change Xi'an 710061China

Cadmium (Cd) pollution in agricultural soils has become a severe threat to food security and human health in recent years. Stable Cd isotopes are a potentially powerful tool for identifying the sources of Cd in soils. However, many Earth surface processes, including adsorption, leaching, and biogeochemical cycles in plants, may generate Cd isotope fractionation, which can complicate the potential application of Cd isotopes in tracing the sources of Cd pollution in soils. In this work, the Cd isotope compositions of typical Fe-Mn nodules (FMNs) and surrounding soils in two different soil profiles are investigated. Our results show that the FMNs in lower layers (i.e., C and W horizons) are isotopically lighter than the surrounding soils by –0.114‰ to –0.156‰ (Δ114/110CdFMN-soil). We interpret this fractionation as the result of preferential adsorption of isotopically light Cd onto the surface of goethite. In the upper layers (i.e., P and A horizons), the Δ114/110CdFMN-soil values are more negative in the P horizon (–0.213‰ to –0.388‰) but more positive in the A horizon (0.061‰ to 0.204‰). We interpret these fractionations as the result of natural biogeochemical processes (i.e., leaching and biological cycling) during soil development. Soil leaching preferentially releases isotopically heavy Cd into the underlying soil (i.e., P horizon), shifting the topsoil towards lower δ114/110Cd values but the underlying soils towards higher δ114/110Cd values. Moreover, biological cycling contributes isotopically heavy Cd to the topsoil, probably shifting the topsoil towards higher δ114/110Cd values. Our study demonstrates that the formation of Fe oxyhydroxides, leaching, and biological cycling can considerably modify the soil Cd isotope signature, highlighting the need to consider natural biogeochemical processes when using Cd isotopes to trace heavy metal pollution in soils.

关键词： Cadmium isotopes Fe-Mn nodules Leaching Biological cycling

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Alignment of Fe3o4/Cnt Electrodes Via Magnetic Blade Printing for Wireless Stress-Direction-Recognizing Strain Sensor

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SSRN 2023年

作者： Wang, Guangwei Cong, Chenhao Zheng, Xianbing Li, Hongjiang Wang, Xuhao Jiang, Fuhao Li, Rong Jin, Mingliang Zhang, Pengfei Li, Junru Zhang, Chuanwei Kim, SeHyun Li, Shandong Li, Xinlin College of Mechanical and Electrical Engineering Qingdao University Qingdao266071 China Yeungnam University Korea Republic of School of Chemical Engineering Konkuk University Seoul05029 Korea Republic of Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd China Institute for Future Shandong Key Laboratory of Industrial Control Technology Automation School of Qingdao University Qingdao266071 China University-Industry Joint Center for Ocean Observation and Broadband Communication China

Due to the rapidly growing health field, the use of electronic skin for real-time monitoring of human metrics can provide an important basis for the monitoring of human movement patterns. Wearable flexible strain sensors combined with Internet of Things technology (IoT) are the most important units in the electronic skin. However, most current resistive strain sensors have the same response to strain from all directions, and practical applications are usually limited by a single sensing function. In the present study, a method for the synthesis of Fe3O4/ carbon nanotube (CNT) nanocomposites has been proposed using ultrasound catalysis. In addition, the coupled involvement of an applied magnetic field and the internal friction of a high-viscosity ink (after blending into a highly concentrated ink) have also been used. The parallel alignment of CNT during the electrode preparation has then been optimized, which is here referred to as magnetic blading. The difference in sensitivity between parallel and perpendicular directions in the magnetically bladed electrodes became as large as 300%, and the resulting multifunctional sensor was able to detect both weak and large deformations. Thereby, the sensor showed the Gauge Factor of 25.9 and 0.56 in the strain range of 0 - 3.2 % and 5.8 – 17.4 %, respectively. A strain angle recognition was achieved by using the specific response of parallel arranged CNT to strain, which was based on the detection of the human joint motion and the recognition of acoustic signals. The real-time monitoring of the data was realized by a 4G transmission module, which provided a reference for the development of remote wireless tracking for human health monitoring. © 2023, The Authors. All rights reserved.

关键词： Carbon nanotubes

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Dynamic response of pH to NO 2 − and S 0 directional accumulation during sulfur autotrophic denitrification

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Journal of Environmental Management 2025年 390卷

作者： Pengze Dang Yayi Wang Chen Lyu Han Wang Yan Yuan Xiang Li Miao Shi Jiaen Wang Yujie Hua Jiawen Guo School of Environmental Science and Technology Suzhou University of Science and Technology Suzhou 215009 China State Key Laboratory of Pollution Control and Resources Reuse Shanghai Institute of Pollution Control and Ecological Security College of Environmental Science and Engineering Tongji University Siping Road Shanghai 200092 China Key Laboratory of Songliao Aquatic Environment Ministry of Education Jilin Jianzhu University Changchun 130118 China

Double short-cut sulfur autotrophic denitrification (DSSADN) is capable of reconverting NO 3 − -N produced by partial nitrification -Anammox (PN/Anammox) into NO 2 − -N, while simultaneously reducing SO 4 2− byproduct pollution. Understanding the nitrogen and sulfur transformation processes as well as the functional enzyme activity changes in DSSADN under varying pH conditions is crucial for achieving synchronous accumulation of S 0 and NO 2 − -N. This study investigated the directional accumulation characteristics of S 0 and NO 2 − -N in sulfur autotrophic denitrification (SADN) under different pH conditions by directionally adjusting the pH within the SADN system. The results showed that within the pH range of 7.5–8.5, the NO 3 − -N removal rate (NaRR) and S 2− removal rate (S 2− RR) increases with the increase of the growth of microorganisms. When the pH exceeded 8.5, NaRR and S 2− RR were reduced, and the inhibitory effect intensified with increasing pH, this resulted in a decrease in NaRR and S 2− RR from 1.76 kg/(m 3 ·d) and 4.47 kg/(m 3 ·d) (pH 8.5) to 0.60 kg/(m 3 ·d) and 1.36 kg/(m 3 ·d), respectively. As pH increased, the gene copy numbers of nirk and soxB gradually decreased, while the discrepancy between NaRR, S 2− RR, and the removal rates of NO 2 − -N and S 0 widened, resulting in gradual increases in NO 2 − -N and S 0 accumulation efficiencies, which peaked at 96 % and 91 %, respectively. The accumulation rates of NO 2 − -N and S 0 increased initially and then declined as pH rose from 7.5 to 10, reaching maximum values of 1.29 kg/(m 3 ·d) and 3.31 kg/(m 3 ·d) at pH 8.5. Meanwhile, increasing pH also induced significant changes in microbial community structure, the functional microflora shifted from the full SADN bacterial genus Sulfurimonas (pH 7.5–8.5) to the DSSADN common bacterial genus Thiobacillus (pH 9–10).

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Surface oxidation state modulation in CuO-Co 3 O 4 heterojunctions for enhanced photocatalytic CO 2 reduction

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Inorganic Chemistry Communications 2025年

作者： Xinwei Huang Jing Peng Yixian Wang Yuqing Wang Wenlong Xiang Yanhui Zhang Jian-Feng Li Juan Xu College of Chemistry Chemical Engineering and Environment Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology Fujian Provincial University Key Laboratory of Pollution Monitoring and Control Minnan Normal University Zhangzhou 363000 PR China State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering College of Energy College of Materials College of Physical Science and Technology Xiamen University Xiamen 361005 PR China

Photocatalytic CO 2 reduction (CO 2 RR) offers a sustainable method for converting CO 2 into fuel under mild conditions. Due to the chemical tunability of the Co 2+ /Co 3+ redox pair, Co 3 O 4 has emerged as a promising CO 2 RR catalyst. However, pure Co 3 O 4 suffers from low yield and poor selectivity. This study presents a simple and mild two-step method for constructing CuO-Co 3 O 4 Z -scheme heterojunctions. Through in-situ XPS and DRIFTS characterization techniques, we revealed the triple mechanism by which CuO modification boosts CO yield and selectivity. This mechanism works by optimizing CO 2 adsorption and activation, improving charge carrier separation efficiency, and facilitating the desorption of CO product. CuO modification modulated the surface oxidation state distribution of Co 3 O 4 to increase the Co 2+ /Co 3+ ratio, thereby facilitated the desorption of CO* radicals. Consequently, the optimized catalyst demonstrated outstanding catalytic performance, achieving a CO production rate of 3.07 mmol g −1  h −1 and a remarkable selectivity of 91.3 %. This study presents a new strategy for developing efficient CO 2 RR catalysts through heterojunction interface engineering and valence state regulation.

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Switched High-Gain Based Interval Observer Design for Harmonic Oscillator System

Switched High-Gain Based Interval Observer Design for Harmon...

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Chinese control Conference (CCC)

作者： Tianhang Ming Xiaoling Wang Bo Liu Housheng Su College of Automation & AI Nanjing University of Posts and Telecommunications Nanjing P. R. China Jiangsu Engineering Lab for IOT Intelligent Robots (IOTRobot) Nanjing China College of Information Engineering Minzu University of China Beijing P. R. China Key Laboratory of Image Processing and Intelligence Control of Ministry of Education Huazhong University of Science and Technology Wuhan P. R. China

In this paper, we revisit the interval observer design problem of harmonic oscillator system with unknown but bounded external disturbance and measurement noise. With the bounding information of the external disturbance and measurement noise, a high-gain interval observer is firstly defined and constructed for the harmonic oscillator system to realize the interval estimation on the state and the robust control of the system. Then, a switched high-gain interval observer is proposed to reduce the influence of the measurement noise for a tighter interval width on the state estimation. Finally, some numerical simulations are given to verify the theoretical results.

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MA-FSAR: Multimodal Adaptation of CLIP for few-shot action recognition

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Pattern Recognition 2026年 169卷

作者： Jiazheng Xing Jian Zhao Chao Xu Mengmeng Wang Guang Dai Yong Liu Jingdong Wang Xuelong Li State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University China Institute of AI (TeleAI) China School of Artificial Intelligence Optics and Electronics (iOPEN) Northwestern Polytechnical University (NWPU) China Zhejiang University of Technology China SGIT AI Lab State Grid Corporation of China China Baidu Inc. China

Applying large-scale vision-language pre-trained models like CLIP to few-shot action recognition (FSAR) can significantly enhance both performance and efficiency. While several studies have recognized this advantage, most rely on full-parameter fine-tuning to adapt CLIP’s visual encoder to FSAR data, which not only incurs high computational costs but also overlooks the potential of the visual encoder to engage in temporal modeling and focus on targeted semantics directly. To tackle these issues, we introduce MA-FSAR, a framework that employs the Parameter-Efficient Fine-Tuning (PEFT) technique to enhance the CLIP visual encoder in terms of action-related temporal and semantic representations. Our solution involves a token-level Fine-grained Multimodal Adaptation mechanism: a Global Temporal Adaptation captures motion cues from video sequences, while a Local Multimodal Adaptation integrates text-guided semantics from the support set to emphasize action-critical features. Additionally, we propose a prototype-level text-guided construction module to further enrich the temporal and semantic characteristics of video prototypes. Extensive experiments demonstrate our superior performance in various tasks using minor trainable parameters.

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Layered Double Hydroxides Nanosheets In-Situ Anchored on Ultrathin Mxenes for Enhanced U(Vi) and Eu(Iii) Trapping: Excavating from Selectivity to Mechanism

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SSRN 2022年

作者： Gu, Pengcheng Zhang, Sai Ma, Ran Sun, Mingtai Wang, Suhua Wen, Tao Wang, Xiangke School of Resources and Environment Anhui Agricultural University Hefei230036 China MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Guangdong Maoming525000 China

As a rising star among two-dimensional materials, transition metal carbides (MXenes) with prominent characteristic including chemical functionality and high hydrophilic unfold enormous potential for radionuclide sequestration. The design of functionalized MXenes with high uptake capacity and excellent selectivity as well as outstanding anti-interference ability still remains a grand challenge. In this study, a novel MgAl-LDHs functionalized ultrathin Ti 3 C 2 T x MXene (L-TC) nanosheets with a typical flower-shaped structure was designed, and tested for U(VI) and Eu(III) elimination. The in-situ anchoring strategy of LDHs nanosheets provided an effective path for overcoming the demerits of limited layer space, insufficiency action sites and poor stability of pristine MXenes sheets. Adsorption measurements indicate that the higher porosity and diverse functional groups are conducive for L-TC materials to capture U(VI) and Eu(III). Impressively, L-TC exhibit exceptional trapping capacities toward U(VI) (241.0 mg g -1 ) and Eu(III) (97.1 mg g −1 ), which were significantly higher than those of the original Ti 3 C 2 T x and LDHs. More importantly, L-TC exhibited high uptake selectivity, fast rapid removal kinetics and excellent anti-ion interference. The enrichment mechanism is clearly elucidated and visualized by spectral analysis, revealing a unique U(VI) and Eu(III) uptake selectivity driven by metal-oxygen sites of L-TC via complexation action. This work highlights the bright future of the functional MXene materials in the application of radioactive contaminant, especially for the remediation of the high valence radioactive ions. © 2022, The Authors. All rights reserved.

关键词： Nanosheets

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Multiple Energies-Assisted All-Weather Recovery of Crude Oil by Magnetically Superhydrophobic Sponge

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SSRN 2022年

作者： Guan, Yihao Wang, Zhining Bao, Mutai Chen, Xiuping Dong, Limei Shen, Yun Li, Yiming Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China College of Chemistry & Chemical Engineering Ocean University of China Qingdao266100 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Jinan250100 China

Efficient and safe recovery of high-viscosity marine crude oil spills is still a worldwide challenge. High-viscosity crude oil is difficult to be removed by traditional adsorbent materials. Although some recent developments in photothermal or electric-thermal oil-absorbing materials, the vertical heat transfer inside and the potential hazard of electrical leakage are difficult to be guaranteed. In order to overcome these problems, we polymerized dopamine (DA) in situ on the skeleton surface of the commercial melamine sponge (MS), and further coated the full-wavelength light-absorbing Fe 3 O 4 NPs-Graphene (HF-G) on it to obtain the superhydrophobic sponge with excellent photothermal conversion effect, heat conductivity and magnetic heating capabilities (HF-G/PDA@MS). When the thickness of sponge is 5 mm, the HF-G/PDA@MS shows excellent vertical heat conductivity ability. It also can be combined with an extra electric-heating device to achieve continuous heating to reduce the viscosity and recover crude oil at night or extreme weather. In addition, the temperature of HF-G/PDA@MS can reach about 40 °C by electromagnetic induction heater, indicating that we can use multiple energies-assisted modes to heat the HF-G/PDA@MS. This work provides a promising solution and theoretical support for all-weather solving offshore crude oil spills pollution and recovery. © 2022, The Authors. All rights reserved.

关键词： Recovery

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