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Role of phosphorus on the biogeochemical behavior of cadmium in the contaminated soil under leaching and pot experiments

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Journal of Environmental Sciences 2024年第3期137卷 488-499页

作者： Hui Jia YifanWu Mengqi Zhang Jinhui Ye daolin du He Wang Institute of Environment and Ecology School of Emergency ManagementJiangsu UniversityZhenjiang 212013China School of the Environment and Safety Engineering&Institute of Environment and Ecology Jiangsu UniversityZhenjiang 212013China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China Xuzhou Medical University Affiliated HospitalXuzhou 221004China

Phosphorus(P)is involved in various biochemical reactions in plant growth,so it is beneficial to plants growing in soils contaminated by metals,including cadmium(Cd).However,few studies have reported on the mechanistic roles of P in mitigating Cd toxicity to ryegrass root,and especially in alleviating the disruption of the mitochondrial function of living cells.In this study,the physiological and biochemical mechanisms associated with ryegrass growth under various Cd and P treatments were investigated using leaching and pot systems.The concentration of Cd in soil leachates showed a significantly positive relationship with redox potential(Pduced by 53.3%and 64.5%in the soil leachate with exogenous P application(20 mg/L and 80 mg/L),respectively.Notably,application of P decreased the Cd concentrations in the symplastic fractions and increased the Cd concentrations in the apoplastic fractions in root tips,which may help to alleviate Cd stress to the protoplast.Moreover,exogenous P was found to play a positive role in mitochondrial function and Ca^(2+)variation in root cells under Cd stress,which provides novel insights into the mechanisms of exogenous P in alleviating plant Cd injury.

关键词： Phosphorus Cadmium stress Protoplast Biogeochemical behavior Mitochondrial function

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MAX-DOAS and in-situ measurements of aerosols and trace gases over Dongying,China:Insight into ozone formation sensitivity based on secondary HCHO

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Journal of Environmental Sciences 2024年第1期135卷 656-668页

作者： Xiaojun Zheng Zeeshan Javed Cheng Liu Aimon Tanvir Osama Sandhu Haoran Liu Xiangguang Ji Chengzhi Xing Hua Lin daolin du Institute of Environment and Ecology School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China Key Laboratory of Environmental Optics&Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes University of Science and Technology of ChinaHefei 230026China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China National Agromet Center Pakistan Meteorological DepartmentIslamabad 44000Pakistan Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Information Materials and Intelligent Sensing Laboratory of Anhui Province Anhui UniversityHefei 230601China School of Environmental Science and Optoelectronic Technology University of Science and Technology of ChinaHefei 230026China

This study presents a comprehensive overview of the atmospheric pollutants including Sulfur dioxide(SO_(2)),Nitrogen dioxide(NO_(2)),Formaldehyde(HCHO),Particulate Matter PM;PM_(10):diameter≤10μm,and PM_(2.5):diameter≤2.5μm,and Ozone(O_(3)),over Dongying(Shandong Province)from March-April 2018 and September-October 2019 by employing ground-based Multiple Axis Differential Optical Absorption Spectroscopy(MAX-DOAS)observations along with the in-situ measurements attained by the national air quality monitoring platform.The concentrations of SO_(2)and NO_(2)were under the acceptable level,while both PM_(2.5),and PM_(10)were higher than the safe levels as prescribed by national and international air quality standards.The results depict that 21%of the total observation days were found to be complex polluted days(PM_(2.5)>35μg/m^(3) and O_(3)>160μg/m^(3)).The secondary HCHO was used for accurate analysis of O_(3)sensitivity.A difference of 11.40%and 10%during March-April 2018 and September-October 2019 respectively in O_(3)sensitivity was found between HCHO_(total)/NO_(2)and HCHO_(sec)/NO_(2).The results indicate that primary HCHO have significant contribution in HCHO.O_(3)formation predominantly remained to be in VOC-limited and transitional regime during March-April 2018 and September-October 2019 in Dongying.These results imply that concurrent control of both NO_(x) and VOCs would benefit in ozone reductions.Additionally,the criteria pollutants(PM,SO_(2),and NO_(2))depicted strong correlations with each other except for O_(3)for which weak correlation coefficient was obtained with all the species.This study will prove to be baseline for designing of air pollution control strategies.

关键词： MAX-DOAS Trace gases Ozone sensitivity Secondary HCHO Complex Pollution

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Global change and biological invasions

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Journal of Plant Ecology 2022年第3期15卷 425-428页

作者： Yu-Long Feng daolin du Mark van Kleunen Liaoning Key Laboratory for Biological Invasions and Global Changes College of Bioscience and BiotechnologyShenyang Agricultural UniversityShenyang 110866China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China Department of Biology University of KonstanzKonstanzGermany Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China

Invasion by exotic species is one of the serious socio-economic,environmental and ecological problems currently faced by mankind.Biological invasions have changed the species composition,structure and function of ecosystems,and are seriously threatening global biodiversity,economy and human health(Iqbal et al.2021;Wang et al.2020;Yang et al.2021;Zhao et al.2020;Zheng et al.2015).Biological invasions have resulted in an economic loss of at least US$1.288 trillion over the past few decades worldwide(Diagne et al.2021).As a consequence of these far-reaching impacts,biological invasions have become a hot research topic in modern ecology,and attract major attention from international organizations,governments and scientists all over the world.

关键词： invasion consequence

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How Physical Disturbance and Nitrogen Addition Affect the Soil Carbon Decomposition?

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Phyton-International Journal of Experimental Botany 2022年第9期91卷 2087-2097页

作者： Muhammad Junaid Nazir Xiuwei Zhang daolin du Feihai Yu Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhou318000China College of the Environment&Safety Engineering Jiangsu UniversityZhenjiang212013China

The decomposition of soil organic carbon(SOC)plays a critical role in regulating atmospheric CO_(2)concentrations and climate dynamics.However,the mechanisms and factors controlling SOC decomposition are still not fully understood.Here,we conducted a 60 days incubation experiment to test the effects of physical disturbance and nitrogen(N)addition on SOC decomposition.N addition increased the concentration of NO3-by 51%in the soil,but had little effect on the concentration of NH4+.N addition inhibited SOC decomposition,but such an effect differed between disturbed and undisturbed soils.In disturbed and undisturbed soils,application of N decreased SOC decomposition by 37%and 15%,respectively.One possible explanation is that extra N input suppressed microbial N mining and/or increased the stability of soil organic matter by promoting the formation of soil aggregates and incorporating part of the inorganic N into organic matter,and consequently decreased microbial mineralization of soil organic matter.Physical disturbance intensified the inhibition of N on SOC decomposition,likely because physical disturbance allowed the added N to be better exposed to soil microbes and consequently increased the availability of added N.We conclude that physical disturbance and N play important roles in modulating the stability of SOC.

关键词： Soil organic matter physical disturbance microbial N mining microbial biomass carbon N availability

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Bionic soft robotic gripper with feedback control for adaptive grasping and capturing applications

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Frontiers of Mechanical Engineering 2024年第1期19卷 129-148页

作者： Tingke WU Zhuyong LIU Ziqi MA Boyang WANG daolin MA Hexi YU Department of Engineering Mechanics School of Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China MOE Key Laboratory of Hydrodynamics Shanghai Jiao Tong UniversityShanghai 200240China

Robots are playing an increasingly important role in engineering applications.Soft robots have promising applications in several fields due to their inherent advantages of compliance,low density,and soft interactions.A soft gripper based on bio-inspiration is proposed in this study.We analyze the cushioning and energy absorption mechanism of human fingertips in detail and provide insights for designing a soft gripper with a variable stiffness structure.We investigate the grasping modes through a large deformation modeling approach,which is verified through experiments.The characteristics of the three grasping modes are quantified through testing and can provide guidance for robotics manipulation.First,the adaptability of the soft gripper is verified by grasping multi-scale and extremely soft objects.Second,a cushioning model of the soft gripper is proposed,and the effectiveness of cushioning is verified by grasping extremely sharp objects and living organisms.Notably,we validate the advantages of the variable stiffness of the soft gripper,and the results show that the soft robot can robustly complete assemblies with a gap of only 0.1 mm.Owing to the unstructured nature of the engineering environment,the soft gripper can be applied in complex environments based on the abovementioned experimental analysis.Finally,we design the soft robotics system with feedback capture based on the inspiration of human catching behavior.The feasibility of engineering applications is initially verified through fast capture experiments on moving objects.The design concept of this robot can provide new insights for bionic machinery.

关键词： soft bionic gripper variable stiffness structure large deformation modeling feedback control soft robotic system

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Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands:From sediments,rhizosphere to vegetation

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 165-182页

作者： Yueming Wu Zhanrui Leng Jian Li Chongling Yan Xinhong Wang Hui Jia Lingyun Chen Sai Zhang Xiaojun Zheng daolin du Institute of Environment and Ecology School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Laboratory of Microbiota College of Life ScienceNorthwest Normal UniversityLanzhou 730070China Department of Physics and Electronic Engineering Jiangsu UniversityZhenjiang 212013China

The interactions and mechanisms between sulfur and heavy metals are a growing focus of biogeochemical studies in coastal wetlands.These issues underline the fate of heavy metals bound in sediments or released into the system through sediments.Despite the fact that numerous published studies have suggested sulfur has a significant impact on the bioavailability of heavy metals accumulated in coastal wetlands,to date,no review article has systematically summarized those studies,particularly from the perspective of the three major components of wetland ecosystems(sediments,rhizosphere,and vegetation).The present review summarizes the studies published in the past four decades and highlights the major achievements in this field.Research and studies available thus far indicate that under anaerobic conditions,most of the potentially bioavailable heavy metals in coastal wetland sediments are fixed as precipitates,such as metal sulfides.However,fluctuations in physicochemical conditions may affect sulfur cycling,and hence,directly or indirectly lead to the conversion and migration of heavy metals.In the rhizosphere,root activities and microbes together affect the speciation and transformation of sulfur which in turn mediate the migration of heavy metals.As for plant tissues,tolerance to heavy metals is enhanced by sulfur-containing compounds via promoting a series of chelation and detoxification processes.Finally,to further understand the interactions between sulfur and heavy metals in coastal wetlands,some major future research directions are proposed.

关键词： Coastal wetland Heavy metal Sulfur Biogeochemical cycle

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重度干旱降低两种菊科入侵植物凋落物共同降解的速率

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Journal of Plant Ecology 2023年第1期16卷 177-187页

作者： Youli Yu Huiyuan Cheng Congyan Wang daolin du Department of Environmental Science School of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China Key Laboratory of Forest Plant Ecology Ministry of EducationCollege of ChemistryChemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbin 150040China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China

当前,中国已分布的入侵植物隶属于菊科的种类数量最多。更关键的是,两种入侵植物可以在同一生境中形成共同入侵。此外,干旱可以影响入侵植物的凋落物降解和土壤酶活性。基于此,本研究旨在解析干旱背景下两种菊科入侵植物鬼针草(Bidens p... 详细信息

当前,中国已分布的入侵植物隶属于菊科的种类数量最多。更关键的是,两种入侵植物可以在同一生境中形成共同入侵。此外,干旱可以影响入侵植物的凋落物降解和土壤酶活性。基于此,本研究旨在解析干旱背景下两种菊科入侵植物鬼针草(Bidens pilosa)和加拿大一枝黄花(Solidago canadensis)对凋落物降解和土壤酶活性的单一影响和复合影响。本研究主要通过聚乙烯凋落袋实验完成,其中每一个凋落袋装入5 g入侵植物鬼针草的凋落物,或装入5 g入侵植物加拿大一枝黄花的凋落物,或装入5 g两种菊科入侵植物鬼针草和加拿大一枝黄花等比例混匀的凋落物。干旱处理水平设置为:对照、轻度干旱和重度干旱。实验结束后测定两种菊科入侵植物凋落物单一降解速率和共同降解速率以及土壤酶活性。两种菊科入侵植物凋落物共同降解对土壤脲酶活性的影响为叠加效应。两种菊科入侵植物凋落物共同降解速率以及入侵植物鬼针草凋落物单一降解速率显著高于入侵植物加拿大一枝黄花凋落物单一降解速率。轻度干旱显著增加土壤脲酶活性,但重度干旱显著降低土壤脲酶活性。重度干旱显著降低两种菊科入侵植物凋落物共同降解速率以及入侵植物鬼针草凋落物单一降解速率,但干旱处理未显著影响入侵植物加拿大一枝黄花凋落物单一降解速率。因此,重度干旱可能通过减缓营养循环速率显著影响两种菊科入侵植物共同入侵进程以及入侵植物鬼针草单一入侵进程,但并未显著影响入侵植物加拿大一枝黄花单一入侵进程。

关键词：鬼针草(Bidens pilosa) 共同入侵凋落物降解速率土壤酶活性土壤理化性质加拿大一枝黄花(Solidago canadensis)

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A Practical Regular LDPC Coded Scheme for Physical-Layer Information Security

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China Communications 2024年第5期21卷 190-201页

作者： du Junyi CETC Key Laboratory of Avionic Information System Southwest China Institute of Electronic TechnologyChengdu 610036China

In this paper,we aim to design a practical low complexity low-density parity-check(LDPC)coded scheme to build a secure open channel and protect information from eavesdropping.To this end,we first propose a punctured LDPC coded scheme,where the information bits in a codeword are punctured and only the parity check bits are transmitted to the receiver.We further propose a notion of check node type distribution and derive multi-edge type extrinsic information transfer functions to estimate the security performance,instead of the well-known weak metric bit error rate.We optimize the check node type distribution in terms of the signal-to-noise ratio(SNR)gap and modify the progressive edge growth algorithm to design finite-length codes.Numerical results show that our proposed scheme can achieve a lower computational complexity and a smaller security gap,compared to the existing scrambling and puncturing schemes.

关键词： extrinsic information transfer function physical layer scheme secure open channel security gap

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Early diagnosis and management of neonatal sepsis:a perspective

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World Journal of Pediatrics 2024年第4期20卷 303-306页

作者： Li‑Zhong du Neonatal Intensive Care Unit Children’s Hospital Zhejiang University School of MedicineNational Clinical Research Center for Child Health3333 Binsheng RoadHangzhou 310052China

Neonatal sepsis is an illness caused by bloodstream bacteria or fungal infections that affect newborn infants under 28 days of age.It stands as a significant contributor to morbidity and mortality in neonatal intensive care units(NICUs).With the improved survival rates of very low-birth-weight or extremely premature infants,a growing number of these vulnerable infants are receiving intensive care and undergoing invasive procedures,making nosocomial infections a persistent challenge in NICUs.The mortality rate associated with neonatal sepsis varies depending on factors such as birth weight,gestational age,and other co-morbidities.It can also lead to a range of long-term health consequences,including neurodevelopmental disabilities like cerebral palsy,visual or hearing impairments,and cognitive problems.Furthermore,neonatal sepsis is linked to various adverse outcomes,including respiratory complications,bronchopulmonary dysplasia,nutritional and growth issues,and immunological dysfunction[1].due to its atypical clinical presentation and the low rate of specific diagnostic indicators,such as a positive blood culture,accurately diagnosing neonatal sepsis is challenging.Consequently,the appropriateness of antibiotic treatment is often a matter of controversy.

关键词： neonatal mortality diagnosis

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Warming and elevated nitrogen deposition accelerate the invasion process of Solidago canadensis L.

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Ecological Processes 2022年第1期11卷 890-901页

作者： Guangqian Ren Bin Yang Miaomiao Cui Zhicong Dai Yan Xiang Haiyan Zhang Guanlin Li Jian Li Qaiser Javed daolin du Institute of Environment and Ecology Academy of Environmental Health and Ecological SecuritySchool of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China School of Agricultural Engineering Jiangsu UniversityZhenjiang 212013China School of Inspection and Testing Certification Changzhou Vocational Institute of EngineeringChangzhou 213164China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China

Background:Invasive species can threaten native diversity and alter ecosystem processes while interacting with other components of global environmental change.Invasive plants are becoming increasingly problematic and this can be stimulated by changes in the environment.However,existing studies have primarily investigated the effects of environmental change on a specific stage of plant invasion rather than the continuous invasion process.Methods:A space-for-time substitution experiment was performed to investigate how warming and nitrogen deposition affects the invasion process of a plant.Specifically,different ratios of invasive Solidago canadensis L.to native Artemisia argyi Levl.et Van were employed as a proxy to represent successive levels of invasion.A total of seven treatments were applied in the experiment:ambient(CK),N addition(+5,+12 g m^(−2)year^(−1)),warming(+1.15,+1.86℃)and their interaction(5 g N m^(−2)year^(−1)+1.15℃,12 g N m^(−2)year^(−1)+1.86℃).The growth performance and competitiveness of S.canadensis were investigated.Results:The competitiveness of Solidago canadensis decreased linearly with its invasion degree(p<0.05).Non-linear regression showed that S.canadensis invasion levels of 53%,53%,68%,55%and 58%were the critical thresholds for shifting the direction or magnitude of chlorophyll,leaf nitrogen,leaf shape index,diameter,and root/shoot ratio,respectively.Compared with the ambient treatment(CK,no warming and no N addition),the diameter,height,bio-mass and relative competitiveness of S.canadensis were each limited by warming,to a certain extent,whereas these and the above parameters were significantly increased by nitrogen deposition.The interaction of increased temperature and nitrogen deposition led to significant increases in the growth and competitiveness of S.canadensis,and this effect was detected in every stage of the invasion,throughout the invasion process.Conclusions:Environmental change might have a continuous,progressive,and augmentative effect on the phenotypic traits of S.canade

关键词： Environmental change Phenotypic trait Competitiveness Solidago canadensis L. Invasion process

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