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Influence of cadmium and copper mixtures to rhizosphere bacterial communities

Soil Ecology Letters 2023年第1期5卷 94-107页

作者： Qirui An Yunyang Li Na Zheng Jincai Ma Shengnan Hou Siyu Sun Sujing Wang Pengyang Li Xiaoqian Li Chunmei Zhao Key Laboratory of Groundwater Resources and Environment of the Ministry of Education College of Environment and ResourcesJilin UniversityChangchun 130021China Northeast Institute of Geography and Agricultural Ecology Chinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen UniversityGuangzhou 510006China

To study the effects of combined Cd and Cu pollution on rhizosphere bacterial ***-throughput sequencing was used to examine the response of rhizosphere bacterial communities to heavy-metal stress under single and mixed pollution of cadmium(Cd)and copper(Cu).With additions of Cd and Cu,the mean diversity index of rhizosphere bacterial community was in the order Cu alone>Cd-Cu mixtures>Cd *** all Cd and Cu treatments,the dominant phyla were Proteobacteria,Actinobacteria,Chloroflexi and *** the additions with different concentrations of Cd-Cu mixtures,LEfSe indicated that there were differences in the predominant species of rhizosphere bacterial *** genera such as Streptomyces and Microbacterium belonging to Actinobacteria as biomarkers were significantly enriched in both control and treatments,while some genera such as Pseudoxanthomonas and Rhodopseudomonas belonging to Proteobacteria as biomarkers were observed to be enriched in the additions with single and mixture of Cd and *** to the Nonmetric multidimensional scaling(NMDS)analysis,the structure of rhizosphere bacterial community was different between treatments and the *** Component Analysis(PCA)and permutational multivariate analysis of variance(PERMANOVA)showed that there were significant differences among treatments(p<0.01),and that the addition of Cu might be the primary factor affecting the composition of rhizosphere bacterial communities.

关键词： Cadmium Copper High-throughput sequencing Bacterial community structure

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An insight on the mechanism of efficient leaching of vanadium from vanadium shale induced by microwave-generated hot spots

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International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 293-302页

作者： Sheng Li Yimin Zhang Yizhong Yuan Pengcheng Hu School of Resource and Environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Collaborative Innovation Center of Strategic Vanadium Resources Utilization Wuhan 430081China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan University of Science and TechnologyWuhan 430081China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

Microwave heating can rapidly and uniformly raise the temperature and accelerate the reaction *** this paper,microwave heating was used to improve the acid leaching,and the mechanism was investigated via microscopic morphology analysis and numerical simulation by COMSOL Multiphysics *** effects of the microwave power,leaching temperature,CaF_(2) dosage,H_(2)SO_(4) concentration,and leaching time on the vanadium recovery were investigated.A vanadium recovery of 80.66%is obtained at a microwave power of 550 W,leaching temperature of 95℃,CaF_(2) dosage of 5wt%,H_(2)SO_(4) concentration of 20vol%,and leaching time of 2.5 *** with conventional leaching technology,the vanadium recovery increases by 6.18%,and the leaching time shortens by 79.17%.More obvious pulverization of shale particles and delamination of mica minerals happen in the microwave-assisted leaching *** simulation results show that the temperature of vanadium shales increases with an increase in electric field(E-field).The distributions of E-field and temperature among vanadium shale particles are relatively uniform,except for the higher content at the contact position of the *** analysis results of scaleup experiments and leaching experiments indicate high-temperature hot spots in the process of microwave-assisted leaching,and the local high temperature destroys the mineral structure and accelerates the reaction rate.

关键词： vanadium shale microwave-assisted leaching hot spots numerical simulation

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Mechanistic insights to sorptive removal of four sulfonamide antibiotics from water using magnetite-functionalized biochar

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Biochar 2023年第1期5卷 1377-1388页

作者： Shanshan Bai Yaolu Zhou Mingrong Qian Jun Xia Zhiqiang Sun Yujiao Wang Xiaochen Huang Shishu Zhu Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province Interdisciplinary Research AcademyZhejiang Shuren UniversityHangzhou 310015People’s Republic of China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090People’s Republic of China State Key Lab of Biocontrol Guangdong Provincial Key Laboratory of Plant ResourcesSchool of AgricultureShenzhen Campus of Sun Yat-Sen UniversityShenzhen 518107People’s Republic of China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

Magnetite-functionalized biochar(MBC)is a promising engineered material for remediation of antibiotic-contaminated ***,sorption mechanisms of ionizable organic compounds such as sulfonamide antibiotics(SAs)on MBC are still *** study employed four representative SAs including sulfamethazine(SMT),sulfamerazine(SMR),sulfadiazine(SDZ),and sulfamethoxazole(SMX),to compare the difference in sorption on *** showed that the sorption capacities and affinities of the four SAs varied with their substituents,hydrophobic properties,and dissociation constants(pKa).Synergistic effect during co-pyrolysis with Fe^(3+)enhanced the sorption performance of MBC towards SAs compared to original *** methods confirmed structural changes of MBC such as the variance in oxygen-containing groups and defective/graphitized *** of modeling pH-dependent sorption revealed that H-bonding orπ-bond assisted H-bonding determined the sorption affinities and capacities of *** particular,the SAs with lower pKa were thermodynamically favorable to form H-bonding with MBC via proton exchange with water *** calculation results quantified the contributions of H-bonding strengths and found that the energies of H-bonding were correlated with affinities of ***,contributions of oxygencontaining groups instead of minerals dominated the H-bonding *** insights from this study can be valuable in exploring engineered BC composites for practical application in field remediation.

关键词： Biochar Antibiotics Sorption capacity Synergistic effect Quantum calculation

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Glutamine,glutamate,and aspartate differently modulate energy homeostasis of small intestine under normal or low energy status in piglets

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Animal Nutrition 2022年第1期8卷 216-226页

作者： Jing Wang Nan Wang Ming Qi Jianjun Li Bie Tan College of Animal Science and Technology Hunan Agricultural UniversityChangsha 410128HunanChina Animal Nutrition and Human Health Laboratory Hunan Provincial Key Laboratory of Animal Intestinal Function and RegulationSchool of Life SciencesHunan Normal UniversityChangsha 410081HunanChina Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agroecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125HunanChina University of Chinese Academy of Sciences Beijing 10008China

Weaning stress may cause reduced energy intake for maintenance of mucosal ***,Glu,and Asp are major energy sources for the small *** study investigated whether Gln,Glu,and Asp improve the intestinal morphology via regulating the energy metabolism in weaning piglets.A total of 198 weaned piglets were assigned to 3 treatments:control(Basal diet+1.59%L-Ala);T1(Basal diet+1%L-Gln+0.5%L-Glu+0.1%L-Asp);T2(Low energy diet+1%L-Gln+0.5%L-Glu+0.1%L-Asp).Jejunum and ileum were obtained on d 5 or 21 post-weaning.T1 enhanced growth performance.T1 and T2 treatments improved small intestinal morphology by increasing villus height,goblet cell number and decreasing crypt *** post-weaning affected the efficacy of T2,but not T1,on energy *** normal energy supplementation,Gln,Glu,and Asp restored small intestinal energy homeostasis via replenishing the Krebs'cycle and down-regulating the AMPK(adenosine monophosphate activated protein kinase)*** these are not sufficient to maintain the intestinal energy-balance of piglets fed with a low energy diet on d 5 post-weaning,the AMPK,glycolysis,beta-oxidation,and mitochondrial biogenesis are activated to meet the high energy demand of *** data indicated that Gln,Glu,and Asp could restore the energy homeostasis of intestinal mucosa of weaning piglets under normal energy *** energy feeding may increase the susceptibility of piglets to stress,which may decrease the efficacy of Gln,Glu,and Asp on the restoration of energy *** findings provide new information on nutritional intervention for insufficient energy intake in weaning piglets.

关键词： Glutamine Glutamate Aspartate Small intestine Energy metabolism

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Screening legacy and emerging organic pollutants in the contaminated soil of Dhaka,Bangladesh

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Emerging Contaminants 2024年第3期10卷 343-353页

作者： Refayat Nigar Shizhen Zhao Xin Liu Huanfang Huang Lele Tian Yuwei Xiao Ahsan Habib Gan Zhang State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou510640China Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center Guangzhou510230China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental SciencesMinistry of Ecology and EnvironmentGuangzhou510530China Department of Chemistry University of DhakaDhaka1000Bangladesh University of Chinese Academy of Sciences Beijing100049China

The current understanding of the legacy and emerging organic pollutants in the soil of Bangladesh remains *** disposal practices,particularly in e-waste,landfills,and industrial operations,may lead to the pervasive presence of persistent organic pollutants(POPs)and polycyclic aromatic hydrocarbons(PAHs)in the *** study aimed to systematically investigate the concentrations,sources,and risk assessment of halogenated flame retardants(HFRs),polychlorinated biphenyls(PCBs),polychlorinated naphthalenes(PCNs),organochlorine pesticides(OCPs),chlorinated paraffins(CPs),and PAHs in the contaminated soil of Dhaka's dumpsites,e-waste,and industrial areas collected in *** total concentration of investigated pollutants averaged at 4790±4040 ng g^(-1)dw,with the following order:P44CPs(4110±4140 ng g^(-1)dw)>P16PAHs(422±491 ng g^(-1)dw)>P16HFRs(190±538 ng g^(-1)dw)>P209PCBs(43.5±73.5 ng g^(-1)dw)>P50PCNs(17.7±21.0 ng g^(-1)dw)>P27OCPs(9.41±9.61 ng g^(-1)dw).The e-waste site exhibited the highest total concentration of the target pollutants,reaching 12,700 ng g1 *** were the predominant contributors,accounting for averages of 81.8%,70.5%,and 68.5%to waste landfills,e-waste,and industrial sites,respectively.A comprehensive analysis of 209 PCB congeners revealed their primary origin from Aroclor PCBs,with minor contributions from unintentionally produced *** highest incremental lifetime carcinogenic risk(ILCR)occurred in e-waste sites,contributed by dioxin-like PCBs,with a maximum value of 5.9×10^(-5)for adults,exceeding the limit 1.0×10^(-6)set by the *** non-carcinogenic hazard quotients(HQs)were much lower,suggesting no significant risk from the investigated *** findings highlight the importance of proper waste management and regulated e-waste recycling to mitigate potential hazardous risks to the Bangladeshi population.

关键词： Persistent organic pollutants Polycyclic aromatic hydrocarbons Chlorinated paraffins Polychlorinated biphenyls Risk assessment Contaminated soil Bangladesh

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Microeukaryotic plankton community dynamics under ecological water replenishment:Insights from eDNA metabarcoding

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Environmental Science and Ecotechnology 2024年第4期20卷 278-290页

作者： Shuping Wang Songsong Gu Yaqun Zhang Ye Deng Wenhui Qiu Qianhang Sun Tianxu Zhang Pengyuan Wang Zhenguang Yan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China CAS Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China Key Laboratory of Aquatic Genomics Ministry of Agriculture and Rural AffairsBeijing Key Laboratory of Fishery BiotechnologyChinese Academy of Fishery SciencesBeijing100141China College of Resources and Environment University of Chinese Academy of SciencesBeijing100190China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen518055China

Ecological water replenishment(EWR)is an important strategy for river restoration globally,but timely evaluation of its ecological effects at a large spatiotemporal scale to further adjust the EWR schemes is of great ***,we examine the impact of EWR on microeukaryotic plankton communities in three distinct river ecosystems through environmental DNA(eDNA)*** three ecosystems include a long-term cut-off river,a short-term connected river after EWR,and long-term connected *** analyzed community stability by investigating species composition,stochastic and deterministic dynamics interplay,and ecological network *** found that EWR markedly reduced the diversity and complexity of microeukaryotic plankton,altered their community dynamics,and lessened the variation within the ***,EWR disrupted the deterministic patterns of community organization,favoring dispersal constraints,and aligning with trends observed in naturally connected *** shift from an isolated to a temporarily connected river appeared to transition community structuring mechanisms from deterministic to stochastic dominance,whereas,in permanently connected rivers,both forces concurrently influenced community *** ecological network in temporarily connected rivers post-EWR demonstrated significantly greater stability and intricacy compared to other river *** shift markedly bolstered the resilience of the ecological *** eDNA metabarcoding insights offer a novel understanding of ecosystem resilience under EWR interventions,which could be critical in assessing the effects of river restoration projects throughout their life cycle.

关键词： Ecological water replenishment Community stability Succession Community assembly mechanism Ecological network

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Chlorine substitution-dependent toxicities of polychlorinated biphenyls to the earthworm Eisenia fetida in soil

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Journal of Environmental Sciences 2023年第6期128卷 171-180页

作者： Jianying Zhang Mengyang He Yaoxuan Liu Lei Zhang Haojie Jiang Daohui Lin College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China National Demonstration Center for Experimental Environment and Resources Education Zhejiang UniversityHangzhou 310058China Institute of Environmental Health Zhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou 310058China China Energy Science and Technology Research Institute Co.Ltd. Nanjing 210023China

Polychlorinated biphenyls(PCBs)with different chlorine substitution patterns often coexist in e-waste-processing ***,the single and combined toxicity of PCBs to soil organisms and the influence of chlorine substitution patterns remain largely ***,we evaluated the distinct in vivo toxicity of PCB28(a trichlorinated PCB),PCB52(a tetrachlorinated PCB),PCB101(a pentachlorinated PCB),and their mixture to earthworm Eisenia fetida in soil,and looked into the underlining mechanisms in an in vitro test using *** a 28-days exposure,all PCBs(up to 10 mg/kg)were not fatal to earthworms,but could induce intestinal histopathological changes and microbial community alterations in the drilosphere system,along with a significant weight ***,pentachlorinated PCBs with a low bioaccumulation ability showed greater inhibitory effects on the growth of earthworm than lowly chlorinated PCBs,suggesting that bioaccumulation was not the main determinant of chlorine substitution-dependent ***,in vitro assays showed that the highly chlorinated PCBs induced a high-percentage apoptosis of eleocytes in the coelomocytes and significantly activated antioxidant enzymes,indicating that the distinct cellular vulnerability to lowly/highly chlorinated PCBs was the main contributor to the PCBs *** findings emphasize the specific advantage of using earthworms in the control of lowly chlorinated PCBs in soil due to their high tolerance and accumulation ability.

关键词： Soil contamination Organochlorine Invertebrate Subchronic toxicity Coelomocyte

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Adsorption of herring sperm DNA onto pine sawdust biochar:Thermodynamics and site energy distribution

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Frontiers of Environmental Science & Engineering 2022年第11期16卷 223-232页

作者： Mingyi Yang Lin Shi Di Zhang Zhaohui He Aiping Liang Xiao Sun Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China School of Resources and Environment Linyi UniversityLinyi 276005China Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Kunming 650500China School of Environmental and Material Engineering Yantai UniversityYantai 264005China

Environmental deoxyribonucleic acid(eDNA),which includes antibiotic resistance genes,is ubiquitous in the *** interactions between eDNA and biochar,a promising material widely used in soil amendment and water treatment,greatly affect the environmental behavior of *** few experimental evidences are available yet,especially on the information of thermodynamics and energy distribution to explains the interactions between biochar and *** study investigated the adsorption of herring sperm DNA(hsDNA)on pine sawdust biochar,with a specific emphasis on the adsorption thermodynamics and site energy *** adsorption of hsDNA on biochar was enhanced by an increase in the pyrolysis and adsorption *** higher surface area,strongerπ−πinteraction,and weaker electrostatic repulsion between hsDNA and biochars prepared at high pyrolysis temperatures facilitated the adsorption of *** thermodynamics indicated that the adsorption of hsDNA on biochar was spontaneous and ***,higher temperature was beneficial for the adsorption of hsDNA on biochar;this was well explained by the increase in E*and F(E*)with the adsorption *** results are useful for evaluating the migration and transformation of eDNA in the presence of biochar.

关键词： Environmental deoxyribonucleic acid Antibiotic resistance genes Biochar Adsorption thermodynamics

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Biochar technology cannot offset land carbon emissions in Guangdong province, China

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Carbon Research 2024年第1期3卷 1-14页

作者： Wang, Funing Zhou, Wenneng Wang, Xili Zhao, Qing Han, Mengjie State Key Lab of Clean Energy Utilization Institute of Carbon Neutrality State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control Zhejiang University Hangzhou310027 China Jiaxing Research Institute Zhejiang University Jiaxing314000 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Economic & amp Information center Zhejiang310006 China Department of Earth System Science Ministry of Education Key Laboratory for Earth System Modeling Institute for Global Change Studies Tsinghua University Beijing100084 China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management Institute of Eco-environmental and Soil Sciences Guangdong Academy of Sciences Guangzhou510650 China National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangzhou510650 China

As a highly developed region, Guangdong province has substantial industrial emissions. Its subtropical monsoon climate, characterized by abundant hydrothermal conditions, contributes to a substantial biomass potential. The adoption of potential biomass-based carbon dioxide removal (CDR) technologies, such as biochar, presents an opportunity to mitigate emissions and work towards carbon neutrality in the future. However, the current state of the land carbon balance and the CDR potential of biochar in Guangdong province remains unclear. We first calculated the land carbon balance based on inventory data. Then we estimated the CDR potential of biochar derived from agricultural residues, forestry residues, and bioenergy crops cultivated on marginal lands in Guangdong province using life cycle analysis (LCA). Results show that Guangdong province has not yet achieved carbon neutrality, with a net emission (carbon emissions remaining after offsetting by carbon sinks) of 925.63 Tg CO2e (CO2 equivalent, 1Tg = 106 t) in 2021. Emissions from energy consumption account for the highest proportion, contributing 83.8% of total emissions. In the highest biomass utilization scenario, the maximum CDR potential of biochar derived from all biomass types reaches 84.30 Tg CO2e yr-1, which could offset 9.11% of net carbon emissions in Guangdong province. Our findings provide crucial guidance for setting emission reduction targets and implementing effective mitigation strategies in Guangdong province under temperature warming. Graphical Abstract: (Figure presented.) © The Author(s) 2024.

关键词： Carbon capture and utilization

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PM_(2.5)and water-soluble inorganic ion concentrations decreased faster in urban than rural areas in China

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Journal of Environmental Sciences 2022年第12期34卷 83-91页

作者： Yangyang Zhang Aohan Tang Chen Wang Xin Ma Yunzhe Li Wen Xu Xiaoping Xia Aihua Zheng Wenqing Li Zengguo Fang Xiufen Zhao Xianlong Peng Yuping Zhang Jian Han Lijuan Zhang Jeffrey L.Collett Jr Xuejun Liu Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China Analysis and Testing Center Beijing Normal UniversityBeijing 100875China Fujian Institute of Tobacco Agricultural Sciences Fuzhou 350003China College of Resources and Environment Qingdao Agricultural UniversityQingdao 266109China College of Resources and Environment Northeast Agricultural UniversityHaerbin 150030China College of Resources and Environment Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources UseHunan Agricultural UniversityChangsha 410128China College of Resources and Environment Hebei Agricultural UniversityBaoding 071001China Department of Atmospheric Science Colorado State UniversityFort CollinsCO 80523USA

We investigated variations of PM_(2.5)and water-soluble inorganic ions chemical characteristics at nine urban and rural sites in China using ground-based *** 2015 to 2019,mean PM_(2.5)concentration across all sites decreased by 41.9μg/m~3with a decline of 46%at urban sites and 28%at rural sites,where secondary inorganic aerosol(SIAs)contributed to 21%(urban sites)and 17%(rural sites)of the decreased PM_(2.5).SIAs concentrations underwent a decline at urban locations,while sulfate(SO_(4)^(2–)),nitrate(NO_(3)^(–)),and ammonium(NH_(4)^(+))decreased by 49.5%,31.3%and 31.6%,***,only SO_(4)^(2–)decreased at rural sites,NO_(3)^(–)increased by 21%and NH_(4)^(+)decreased *** changes contributed to an overall SIAs increase in *** molar ratios of NO_(3)^(–)to SO_(4)^(2–)and NH_(4)^(+)to SO_(4)^(2–)were observed at urban sites than rural sites,being highest in the heavily polluted *** molar ratios of NH_(3)/NH_xwere higher in 2019 than 2015 at both urban and rural sites,implying increasing NH_xremained as free NH_(3).Our observations indicated a slower transition from sulfate-driven to nitrate-driven aerosol pollution and less efficient control of NO_(x)than SO_(2)related aerosol formation in rural regions than urban ***,the common factor at urban and rural sites appears to be a combination of lower SO_(4)^(2–)levels and an increasing fraction of NO_(3)^(–)to PM_(2.5)under NH_(4)^(+)-rich *** findings imply that synchronous reduction in NO_(x)and NH_(3)emissions especially rural areas would be effective to mitigate NO_(3)^(–)-driven aerosol pollution.

关键词： PM_(2.5) Nitrate Ammonium Sulfate Air pollutant emission pollution mitigation

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