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Sustainable Chemistry for the Environment 2023年 2卷

作者： Asaithambi, Perumal Yesuf, Mamuye Busier Govindarajan, Rajendran Selvakumar, Periyasamy Niju, Subramaniapillai Pandiyarajan, T. Kadier, Abudukeremu Nguyen, D. Duc Alemayehu, Esayas Faculty of Civil and Environmental Engineering Jimma Institute of Technology Jimma University Po Box - 378 Jimma Ethiopia Department of Chemical Engineering Hindustan Institute of Technology and Science Rajiv Gandhi Salai Padur Tamilnadu Chennai 603103 India Department of Chemical Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama 1888 Ethiopia Department of Biotechnology PSG College of Technology Tamilnadu Coimbatore 641004 India Department of Sciences Indian Institute of Information Technology Design and Manufacturing Dinnedevarapadu Andhra Pradesh Kurnool 518007 India Laboratory of Environmental Science and Technology The Xinjiang Technical Institute of Physics and Chemistry Key Laboratory of Functional Materials and Devices for Special Environments Chinese Academy of Sciences Urumqi 830011 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China Department of Environmental Energy Engineering Kyonggi University South Korea Africa Center of Excellence for Water Management Addis Ababa University Po Box-1176 Addis Ababa Ethiopia

The environmental industry has demonstrated an increasing interest in employing electrocoagulation (EC) process to treat industrial wastewater/effluent for recycling/drinking purposes. An iron (Fe)/aluminum (Al) plate-based batch recirculation electrocoagulation technology for wastewater treatment in the distillery industry is discussed in this work. The impact of different operational parameters, including COD, wastewater pH, current, inter-electrode spacing, combination of electrodes, recirculation flow rate, concentration of electrolytes, and treatment duration on % color, % COD reduction efficiency, and energy consumption was examined. The experimental outcomes demonstrated that, the color removal was 100 %, COD removal was 99.90 %, and energy consumption was 7.73 kWh m⁻³ for COD of 3600 mg L⁻¹, current of 0.56 Amp, combination of electrodes of Fe/Fe, inter-electrode spacing of 1 cm, wastewater pH of 7, flow rate of 15 L h⁻¹, concentration of electrolytes of 5 g L⁻¹, and treatment time of 180 min, respectively. It was found that, a longer treatment period, higher electrolyte concentrations and current, lower COD concentrations and recirculation flow rates, Fe/Fe electrode pairings, a pH of 7, and a smaller inter-electrode spacing all contributed to increased % COD reduction efficiency. The quantity of solid sludge formed were studied with the help of operational parameters, and the results were reported. Under the optimized process conditions, the wastewater treated can be fully recovered as clean water. As a consequence of this, the results of the experiments have shown that the batch recirculation electrocoagulation process has the potential to be a more promising solution to the problem of eliminating contaminants from wastewater and industrial effluent. © 2023 The Author(s)

关键词： Batch recirculation electrocoagulation Clean water Energy use Industrial effluent Pollutant removal Solid sludge formed

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Molecular mechanisms underlying plant responses to low phosphate stress and potential applications in crop improvement

New Crops

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New Crops 2025年 2卷

作者： Hu, Dandan Zhang, Jinyu Yang, Yuming Yu, Deyue Zhang, Hengyou Zhang, Dan Collaborative Innovation Center of Henan Grain Crops College of Agronomy Henan Agricultural University Zhengzhou 450002 China Henan Institute of Science and Technology Xinxiang 453003 China National Center for Soybean Improvement National Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Nanjing 210095 China State Key Laboratory of Black Soils Conservation and Utilization Key Laboratory of Soybean Molecular Design Breeding Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Harbin 150081 China

Phosphorus is a critical nutrient for plant growth, influencing crop development and yield. However, the excessive reliance on phosphate fertilizers to address inorganic phosphate (Pi) deficiency is unsustainable. This review explores recent advances in understanding plant responses to Pi deficiency, focusing on the molecular mechanisms and genes involved. Key biological participants include Pi transporters, transcription factors, hormones, sugar signaling pathways, root exudates, and the complex interactions between Pi and other essential nutrients such as nitrogen, iron, and potassium. Furthermore, the role of microRNAs, lncRNAs, lipid remodeling, and genetic and epigenetic modifications are discussed. The review also highlights the potential of integrating phenomics, multi-omics approaches, gene editing, breeding strategies, and artificial intelligence to accelerate the development of Pi-efficient crops to meet the demands of a growing global population amidst dwindling Pi reserves. © 2025 Henan University

关键词： Multi-omics Phosphate deficiency Pi efficiency Strategies Transcription regulation

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Spectral Efficiency Analysis of Downlink Transmission for Two-Way Cell-Free Massive MIMO System With Few-Bit ADCs

Spectral Efficiency Analysis of Downlink Transmission for Tw...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Jiaxi Cui Pei Liu Kehao Wang Hongkuan Zhou Yue Zhang Xinghua Sun Stefano Buzzi School of Information Engineering Wuhan University of Technology Wuhan China Ministry of Education Key Lab of Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) Nanjing China Science and Technology on Thermal Energy and Power Laboratory Wuhan 2nd Ship Design and Research Institute Wuhan China Department of Electronic and Information Engineering Shantou University Shantou China School of Electronics and Communication Engineering Sun Yat-sen University Guangdong China University of Cassino and Southern Lazio Cassino Italy Politecnico di Milano Milano Italy

This paper studies the downlink spectral efficiency of a two-way cell-free massive multiple-input multiple-output system with few-bit analog-to-digital converts (ADCs). By utilizing minimum mean squared error channel estimation method and maximal-ratio transmission precoder, we derive a closed-form expression for the effective downlink signal-to-interference-plus-noise ratio (SINR), which applies to any number of access point (AP) antennas M and distortion factors of ADCs in both AP and user pair sides. Additionally, the obtained analytical expression specializes to the conventional one when the ideal ADCs are adopted. Moreover, the asymptotic performance and power scaling law of the effective SINR in high M regime are studied. The corresponding analysis indicates that increasing M can provide considerable gains to compensate the rate loss caused by non-ideal ADCs and also, appropriately cutting down the pilot power and transmission power will not affect the SINR performance in high M region. Finally, all the theoretical results are verified via simulations.

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Life Cycle Assessment of Precious Timber Tree Production Systems in China for Ecosystem Restoration

SSRN

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SSRN 2024年

作者： Liu, Xin Zhao, Meifang Yang, Jiaqiang Chen, Yunfeng Sun, Mengde Kang, Peng Wei, Lanying Tan, Yibo College of Life and Environmental Science Central South University of Forestry and Technology Hunan Changsha410004 China National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China Central South University of Forestry and Technology Hunan Changsha410004 China Guangxi Weidu State Forest Farm Guangxi Laibin546100 China Guangxi Forestry Survey and Design Institute Guangxi Nanning530011 China Guangxi Forestry Research Institute Guangxi Nanning530002 China Guangxi Lijiangyuan Forest Ecosystem Research Station Guangxi Guilin541316 China Guilin Xing’an Lijiangyuan Forest Ecosystem Observation and Research Station of Guangxi Guangxi Guilin541316 China

Based on China's Ninth Forest Resources Inventory, 1.85 billion acres of ecologically beneficial forests face degradation, surpassing carbon losses from deforestation. To address this, the National Forest Management Plan (2016-2050) aims to rehabilitate degraded public welfare forests, increase valuable timber output by 90.3 billion yuan, and enhance carbon stocks by 106 million tons. Precious tree plantation restoration accounts for 25% of these efforts, leading to rising seedling demand. This study provides a life cycle greenhouse gas (GHG) inventory for the production of red oatchestnut (Castanopsis hystrix) seedlings, offering insights for emission reduction. The study follows ISO 14040 Life Cycle Assessment (LCA) methodology, analyzing data from state-owned nurseries in Guangxi, China. Each 10 x 12 cm seedling emits 0.0256 kg CO2e, with energy use as the largest contributor (47.34%), followed by materials (25.17%), chemicals (12.5%), water and labor (11.25%), and transportation (3.74%). Irrigation is the most carbon-intensive activity (47.54%), followed by potting up (14.25%) and fertilization (11.81%). To reduce emissions, energy-efficient irrigation systems and sustainable energy sources are essential. Reusing seedling containers and optimizing fertilizer use can further mitigate emissions in nursery production. © 2024, The Authors. All rights reserved.

关键词： Life cycle assessment

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Digital Construction of Large-Size Minimal Surface:Transformation from Mathematical Model to Mechanical Model

Digital Construction of Large-Size Minimal Surface:Transform...

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作者： Chaohao SU Shujian ZHANG Yi FAN School of Architecture South China University of Technology Architectural Design and Research Institute of SCUT Co. Ltd State Key Laboratory of Subtropical Building Science

Under the background of digitization,the basic algorithm of minimal surface provides novel and rich creative themes for architectural ***,due to the high complexity and extreme thinness,how to convert the mathematical model to the mechanical model has become the biggest challenge in the application of large-size minimal *** the basis of analysing the relation between force and form,this paper explores and verifies the concept and method of transforming mathematical model into mechanical model by combining qualitative analysis and quantitative *** with a work named "Yunjian Linglong" and the related experiments,it provides theoretical clues for the technical route of highly complex heteromorphic hyperboloid,and empirical reference value for the cooperation between shape design and structural design under the digital background.

关键词： Digital construction minimal surface structural form-finding ultra-thin shell

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Stable 1t -2h Mos2 Heterostructures for Efficient Electrocatalytic Hydrogen Evolution

SSRN

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SSRN 2022年

作者： Hong, Zhaoan Hong, Wengting Wang, Bicheng Cai, Qian He, Xu Liu, Wei 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 Fujian Fuzhou350002 China College of Chemistry Fuzhou University Fuzhou350108 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China

1T-phase molybdenum disulfide (1T MoS2) can efficiently facilitate the charge transfer and provide the active site, exhibiting a better hydrogen evolution reaction (HER) than 2H MoS2. However, its thermodynamic instability becomes a major drawback that hinders its practical application. We report a chemical vapor deposition (CVD) method to grow MoS2 nanosheets with high 1T content (61.5%) by introducing an appropriate amount of antimony oxide. The 1T-2H hybrid structures grown in this mode are thermodynamically stable. 1T phase of the MoS2 produces a unique charge distribution that makes the S atoms at the 1T-2H interface more favorable for H adsorption, thus enhancing the HER activity on the MoS2 basal plane. This study has provided a new idea for the 1T-phase MoS2 preparation for efficient HER. © 2022, The Authors. All rights reserved.

关键词： Phase transitions

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Corrosion of New Zirconium Claddings in 500 ℃/10.3 MPa Steam: Effects of Alloying and Metallography

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Acta Metallurgica Sinica(English Letters) 2019年第8期32卷 981-994页

作者： Jing-Jing Liao Zhong-Bo Yang Shao-Yu Qiu Qian Peng Zheng-Cao Li Ming-Sheng Zhou Hong Liu Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610213China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China

With the aim of improving corrosion resistance of rod cladding for in-service and accident conditions,six new zirconium alloys(named N1-N6)have been *** contents of Sn and Nb were optimized for better behavior at high-temperature pressurized water,and Fe,Cr,V,Cu or Mo elements were added to the alloys to adjust the corrosion behavioi\The current work focused on the rapid corrosion behavior in 500℃/10.3 MPa steam for up to 1960 h,aiming to test the corrosion resistance at high *** structure of matrix and properties of second-phase particles(SPPs)were characterized to find the main differences among these *** the six alloys exhibited better corrosion resistance than N36,and NI was shown to have the best performance.A careful analysis of the corrosion kinetics curves revealed that Cr was beneficial for severe *** Fe,Cr,V,Cu or Mo aggregated into SPPs with diiferent concentrations and *** was demonstrated to be the main reason for different corrosion *** to good processing control,all alloys had a uniform structure and a uniform distribution of *** for N4,N6 and N36,the existing of large-size SPPs(450 nm)might be a contributing factor of the relatively poor corrosion resistance.

关键词： New zirconium cladding Corrosion behavior Alloying elements Metallography Second-phase particles

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Chitosan based antibacterial composite materials for leather industry: a review

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Journal of Leather science and Engineering 2021年第1期3卷 131-148页

作者： Linlin Yuan Qingda Yao Yongxian Liang Ye Dan Yixiao Wang Huitao Wen Yiqing Yang Weihua Dan National Engineering Research Center of Clean Technology in Leather Industry Sichuan UniversityChengduSichuanP.R.China Fujian Key Laboratory of Green Design and Manufacture of Leather JinjiangFujianP.R.China Xingye Leather Technology Co. Ltd.National Enterprise Technical CenterJinjiangFujianP.R.China College of Manufacturing Science and Engineering Sichuan UniversityChengduSichuanP.R.China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghaiP.R.China

Chitosan is an amorphous translucent substance with a structural unit similar to the polysaccharide structure of the extracellular matrix,It has good antibacterial,biocompatible,and degradable *** has important application value in leather,water treatment,medicine,food and other fields,so chitosan and its modified products have received widespread *** article reviewed the preparation methods of chitosan-based antibacterial composites in recent years,including chitosan/collagen,chitosan/graphene,chitosan/tannic acid,and chitosan/polyethylene glycol composite materials,elaborates their modification methods and antibacterial mechanism were reviewed in detail,and its applications in the leather industry as antibacterial auxiliaries and water treatment antibacterial adsorption materials were ***,the future development and challenges of chitosan-based composite materials in the leather industry were forecasted.

关键词： Chitosan Antibacterial Leather Composites Application

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Joint network topology inference via structured fusion regularization

arXiv

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arXiv 2021年

作者： Yuan, Yanli Soh, De Wen Yang, Xiao Guo, Kun Quek, Tony Q.S. Singapore University of Technology and Design Singapore Singapore State Key Laboratory of Integrated Service Institute of Information Science Xidian University Shaanxi Xi'an710071 China

Joint network topology inference represents a canonical problem of jointly learning multiple graph Laplacian matrices from heterogeneous graph signals. In such a problem, a widely employed assumption is that of a simple common component shared among multiple graphs. However, in practice, a more intricate topological pattern, comprising simultaneously of homogeneity and heterogeneity components, would exhibit in multiple graphs. In this paper, we propose a general graph estimator based on a novel structured fusion regularization that enables us to jointly learn multiple graph Laplacian matrices with such complex topological patterns, and enjoys both high computational efficiency and rigorous theoretical guarantees. Moreover, in the proposed regularization term, the topological pattern among graphs is characterized by a Gram matrix, which enables our graph estimator to flexibly model different types of topological patterns through different Gram matrix choices. Computationally, the regularization term, coupling the parameters together, makes the formulated optimization problem intractable, and thus, we develop an algorithm based on the alternating direction method of multipliers (ADMM) to solve it efficiently. Theoretically, non-asymptotic statistical analysis is provided, which proves the consistency of the joint graph estimator and illustrates the impact of the data sample size and the graph structures as well as the topological patterns on the estimation accuracy. Finally, the superior performance of the proposed method is demonstrated through simulated and real data examples. Copyright © 2021, The Authors. All rights reserved.

关键词： Matrix algebra

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Enzyme Pretreatments for Anaerobic Co-Digestion of Food Waste Blended with Bioplastics: Effects on Methane Production and Microbial Community Structure

SSRN

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SSRN 2023年

作者： Jiang, Xintong Bi, Dongsu Cheng, Yu Wang, Shizhuo Peng, Boyu Shen, Haowen Zhang, Tao Xia, Xuefen Zhang, Yalei Shen, Zheng School of Chemical and Environmental Engineering Shanghai Institute of Technology Shanghai201418 China Institute of New Rural Development Tongji University Shanghai200092 China College of Design and Innovation Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Bioplastic bags mixed with food waste seem inevitable with the growth of waste classification and the banning of non-biodegradable polymers in China. To solve the asynchronous degradation of both food waste and bioplastics in the anaerobic fermentation process, we investigated the biological pretreatment is more promising, among the physics, chemistry, and biology treatments, because of the efficient catalytic hydrolysis capacity of enzymes. Three kinds of enzymes (amylases, lipases, and proteinase K) with 0.075 g/L were designed to pretreat FW/bioplastic mixture for 48 h at 35°C and 55 °C. The methane production of anaerobic fermentation increased at 55°C by 15.94%, 27.10%, 64.50%, respectively, and the degradation of bioplastic bags time was advanced from 30 to 24 days. SEM indicated apparent physical degradation that holes developed on the surface of the bioplastic after pretreatments with enzymes. FTIR suggested that the peak of 1700 cm-1 is the typical peak of proteinase K depolymerization, which is weaker at 55°C than at 35°C. Following the pretreatments with proteinase K, The new species of bacteria emerged in the substrate microbiome. These results indicated that biological pretreatment is capable of biodegradation and improves the asynchronous problem between food waste and bioplastics. © 2023, The Authors. All rights reserved.

关键词： Enzymes

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