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| 1 | Size Distributions of Aerosol Sulfates and Nitrates in Beijing during the 2008 Olympic Games: Impacts of Pollution Control Measures and Regional Transport显示文摘为 2008 个奥运会,激烈的控制措施在二氧化物(SO2 ) ,氮氧化物(没有 x ) 和处理穷人的问题的另外的污染物质通风的硫的工业、城市的排出物上被实现在北京的质量。在微粒硫酸盐和硝酸盐集中以及他们的尺寸分布上调查 SO2 和没有 x 减小的效果,分离尺寸的喷雾器样品在照原尺寸的控制前后在北京在城市、顺风的农村地点用微孔的一致存款 impactors (MOUDI ) 被收集。在采样时期期间,在城市、农村的地点的好粒子(PM1.8 ) 的集体集中分别地是 94.0 和 85.9 g m3。超过 90% 硫酸盐和 60% 硝酸盐形成了同样好的粒子。得益于有益的气象学的条件和来源控制,硫酸盐在奥林匹克期间在相当低的集中并且首先在冷凝作用模式被观察。控制措施的效果独立被分析让北风和南方的 air-mass-dominated 天说明任何偏爱。在控制措施被实现以后,当在北方的空气群众占优势时,下午,硫酸盐,和硝酸盐显著地被减少,与在更大的粒子的减小的一个更高的百分比。在控制措施被实现以后,微滴模式粒子,在控制被实现以前,统治了硫酸盐和硝酸盐,显著地在集体集中被减少。但当弄脏的南方的空气群众占优势时,本地来源控制在北京测量,有效地没从北方中国平原由于庞大的地区性的贡献减少周围的硫酸盐集中。 | WANG Xinfeng WANG Tao Ravi Kant PATHAK Mattias HALLQUIST GAO Xiaomeit NIE Wei XUE Likun GAO Jian GAO Rui ZHANG Qingzhu WANG Wenxing WANG Shulan CHAI Fahe CHEN Yizhen | 2013 | Advances in Atmospheric Sciences2013，30，2： | 8 |
| 2 | Rice re-cultivation in southern China: An option for enhanced climate change resilience in rice production显示文摘在南部的中国种的瑞斯说明在播种面积的 94% 总数和在生产的 88% 总数,它非常与中国食物有关系安全。由于在在空间 / 时间的分发的水可获得性和米饭生长之间的延长冲突,然而,米饭生产在 16%22% 的面积受不了季节的干旱,它损害食物生产能力和食物安全。与米饭和惯例集中于季节的干旱的空间分发适应它,并且基于平衡的水的分析供应为并且在 19812030 期间在成长季节规模由米饭要求,这份报纸估计变化在在变化气候下面的米饭生产的过程的季节的干旱以后,并且鉴别为气候的一般米饭重新耕作选择改变改编。一些结论能如下被得出。( 1 )瑞斯在季节的干旱建议衰落,与早季节米饭(早米饭此后)由 12,500 km2 ,由 80,000 km2 的中间的季节米饭(中间的米饭),和由 25,000 km2 的特别地迟了的季节米饭(迟了的米饭),它占几乎20%它的栽培面积。由于气候变化,在生产区域的主要米饭的季节的干旱趋于一般来说减轻,这被显示,迟了的季节米饭特别地。(2 ) 未来气候变化在在中国生产区域的米饭在水资源的空间 / 时间的分发上引起重要影响。为 rice-re-cultivation 基于预先设计的改编行动,米饭耕作模式经历在 19812000 和 20012030 之间的重要改变。在东方贵州和西方的湖南,单个早正的单个干燥耕作的模式被变成两倍收割。在东方湖南,干燥收割的模式加单个干燥耕作早被变成单身者。在北安徽,收割的干燥耕作的模式被变成中间的米饭。所有这些以后为米饭生产针对水的潜在的足够的可获得性。(3 ) 在这份报纸开发的瑞斯重新耕作模式帮助重新平衡对使用空间分析工具使米饭生长适应变化的米饭生长的水需求和供应从空间观点浇可获得性,并且找到响应气候的制片人友好的重新耕作选择改变的米饭。 | MA Xin WU Shaohong LI Yu'e ZHANG Xueyan GAO Qingzhu WU Yang | 2013 | Journal of Geographical Sciences2013，23，1： | 5 |
| 3 | Recent advances in persulfate-based advanced oxidation processes for organic wastewater treatment显示文摘In recent years,with the emergence of new pollutants,the effective treatment of wastewater has become very important.Persulfate-based advanced oxidation processes have been successfully applied to the treatment of wastewater,such as wastewater containing antibiotics,pharmaceuticals and personal care products,dyes,endocrine-disrupting chemicals,chlorinated organic pollutants,and phenolics,for the degradation of refractory organic contaminants.This paper summarizes the production of sulfate radicals,which can be generated by the activation of persulfate via conventional and emerging approaches.The existing problems of persulfate-based advanced oxidation processes were analyzed in detail,including residual sulfates,coexisting factors(coexisting inorganic anions and natural organic matter),and energy consumption.This paper proposes corresponding possible solutions to the problems mentioned above,and this paper could provide a reference for the application of persulfate-based advanced oxidation processes in actual wastewater treatment. | Ke Tian Limin Hu Letian Li Qingzhu Zheng Yanjun Xin Guangshan Zhang | 2022 | Chinese Chemical Letters2022，33，10： | 5 |
| 4 | Compaction Performance of Biomimetic Press Roller to Soil显示文摘 | Jin Tong Qingzhu Zhang Li Guo Yuan Chang Yingjie Guo Fengwu Zhu Donghui Chen Xin Liu | 2015 | Journal of Bionic Engineering2015，12，1： | 3 |
| 5 | A theoretical study of hydrogen-bonded molecular clusters of sulfuric acid and organic acids with amides显示文摘Amides,a series of significant atmospheric nitrogen-containing volatile organic compounds(VOCs),can participate in new particle formation(NPF)throught interacting with sulfuric acid(SA)and organic acids.In this study,we investigated the molecular interactions of formamide(FA),acetamide(AA),N-methylformamide(MF),propanamide(PA),Nmethylacetamide(MA),and N,N-dimethylformamide(DMF)with SA,acetic acid(HAC),propanoic acid(PAC),oxalic acid(OA),and malonic acid(MOA).Global minimum of clusters were obtained through the association of the artificial bee colony(ABC)algorithm and density functional theory(DFT)calculations.The conformational analysis,thermochemical analysis,frequency analysis,and topological analysis were conducted to determine the interactions of hydrogen-bonded molecular clusters.The heterodimers formed a hepta or octa membered ring through four different types of hydrogen bonds,and the strength of the bonds are ranked in the following order:SO-H···O>CO-H···O>N-H···O>C-H···O.We also evaluated the stability of the clusters and found that the stabilization effect of amides with SA is weaker than that of amines with SA but stronger than that of ammonia(NH 3)with SA in the dimer formation of nucleation process.Additionally,the nucleation capacity of SA with amides is greater than that of organic acids with amides. | Chenpeng Zuo Xianwei Zhao Hetong Wang Xiaohui Ma Siyuan Zheng Fei Xu Qingzhu Zhang | 2021 | Journal of Environmental Sciences2021，33，2： | 2 |
| 6 | Dicer-independent snRNA/snoRNA-derived nuclear RNA 3 regulates tumor-associated macrophage function by epigenetically repressing inducible nitric oxide synthase transcription显示文摘Background:Small RNAs(sRNAs)extensively mediate gene-specific chromatin regulation in lower organisms.As a dominant type of functional sRNAs in mature mammals,microRNAs mainly regulate gene expression at posttranscription level in the cytoplasm.Currently,whether there exists a type of nuclear-localized sRNAs mediating gene-specific epigenetic regulation in mature mammalian cells remains largely unclear.Here,we profiled sRNAs enriched in the nucleus and investigated their function in mediating genespecific epigenetic regulation in anti-tumor immunity.Methods:We established cytoplasmic and nuclear transcriptomes of sRNAs of dendritic cells(DCs)using high-throughput sequencing.Transcription abundances of sRNAs and mRNAs were analyzed by reverse transcriptionquantitative polymerase chain reaction(RT-qPCR)assay.The associations between sRNAs and Argonaute(AGO)proteins were detected by RNA immunoprecipitation analysis.Synthesized sRNAs and locked nucleic acid(LNA)-modified sRNA inhibitors were used to screen the function of sRNAs in innate immune cells.The effect of sRNA on the enrichment of either chromatin remodeler or histone modification at the gene promoter was analyzed by chromatin immunoprecipitation(ChIP)-qPCR assay.Chromatin accessibility qPCR assay was used to detect the accessibility of gene promoters.A B16 melanomabearing mouse model was established to determine the function of sRNAs in tumor-associated macrophages(TAMs)and their effect on tumor growth.Results:We identified a new class of nucleus-localized sRNAs,named snRNA/snoRNA-derived nuclear RNAs(sdnRNAs).Some sdnRNAs were Dicerindependent and had no association with Argonaute proteins.sdnRNA-3,the most abundant Dicer-independent sdnRNAs identified in our analysis,was selected as a representative to examine the biological function of sdnRNAs.sdnRNA-3 selectively inhibited the transcription of Nos2 in macrophages during innate immune response by repressing the chromatin accessibility at Nos2 gene promoter.sdnRNA-3 promoted the enrichments of repressive chromatinremodeling regulator Mi-2βand the repressive histone modification H3K27me3 at Nos2 gene promoter.In the B16 melanoma mouse model,we found higher expression of sdnRNA-3 in M2 TAMs than M1 TAMs and DCs.Transfer of sdnRNA-3-silenced macrophages inhibited tumor growth with increased expression of inducible nitric oxide synthase(iNOS)in TAMs.Conclusions:Our results demonstrated that the sdnRNA-3 repressed the transcription of Nos2 by repressing chromatin accessibility at the promoter,providing new insights into the regulation of macrophage function in tumor immunity. | Yang Shi Qingzhu Shi Qicong Shen Qian Zhang Xuetao Cao | 2021 | Cancer Communications2021，41，2： | 2 |
| 7 | Excessive plant compensatory growth:a potential endogenous driver of meadow degradation on the Qinghai-Tibetan Plateau显示文摘Degradation of meadow ecosystems in the largest alpine region of the world,i.e.,the Qinghai-Tibetan Plateau(QTP),is a crucial ecological issue that has ardently discussed in recent years.Many factors,such as livestock overgrazing,climate change and overpopulation of small mammals are treated as important factors that cause the degradation of meadow ecosystems in the QTP.However,there are few hypotheses focus on the potential role of plant compensatory growth on meadow degradation.We proposed a compensatory growth-related hypothesis to understand the potential degradation process of meadow ecosystems in the QTP.We discussed that there are two stages of meadow degradation,i.e.the beginning stage of meadow degradation that is triggered by high-strength overcompensation;and the intensification stage of meadow degradation,which are driven by external factors such as climate warming,small mammals and thawing of permafrost.The mechanism of meadow degradation driven by plant compensatory growth is the asynchronism of plant consumption and the availability of soil nutrients.Our hypothesis that plant compensatory growth drives meadow degradation under the overgrazing condition requires re-examination and modification by testing the balance between soil nutrient cycling rates and the strength of plant compensatory growth in alpine regions. | Yong Zhang Hasbagan Ganjurjav Shikui Dong Qingzhu Gao | 2020 | Ecosystem Health and Sustainability2020，6，1： | 1 |
| 8 | Spirobifluorene-Based Three-Dimensional Covalent Organic Frameworks with Rigid Topological Channels as Efficient Heterogeneous Catalyst显示文摘Although the past decade has witnessed tremendous progress in the development of covalent organic frameworks(COFs),three-dimensional(3D)COFs fabrications and characterizations are still much less studied compared with two-dimensional(2D)COFs,due to their complicated topology structures caused by interpenetration and limited choices of node-building blocks.In this work,we constructed a novel 3D COF(SP-3D-COF-BPY)successfully using orthogonal dual-planar spirobifluorene and bipyridine as building blocks.Also,we demonstrated the application of 3D COF-supported Pd(II)catalyst in heterogeneous catalysis.A sevenfold interpenetrated dia structure was revealed for SP-3DCOF-BPY by powder X-ray diffraction(PXRD)in conjunction with structural simulation and Pawley refinement.The bipyridine-linked frameworks bear one-dimensional(1D)unobstructed rigid channels and offer a high density of discrete coordination sites for chelating Pd(II)species.Very high loading of Pd(II)(∼15 wt%)was achieved in the asymmetric(as)-prepared Pd(II)@3D-COF-BYP.The generated highly ordered porous channels and easily accessible catalytic sites,such as COF-supported Pd(II)complex,serves as a highly active and stable microporous heterogeneous catalyst in Suzuki–Miyaura coupling reactions.The observed catalytic efficiency was high and the catalyst could be conveniently reused multiple times without any noticeable decay in catalytic performance. | Yamei Liu Chenyu Wu Qingzhu Sun Fan Hu Qingyan Pan Jing Sun Yinghua Jin Zhibo Li Wei Zhang Yingjie Zhao | 2021 | CCS Chemistry2021，3，4： | 1 |
| 9 | Si nanowire Bio-FET for electrical and label-free detection of cancer cell-derived exosomes显示文摘Exosomes are highly important in clinical diagnosis due to their high homology with their parental cells.However,conventional exosome detection methods still face the challenges of expensive equipment,low sensitivity,and complex procedures.Field effect transistors(FETs)are not only the most essential electronic component in the modern microelectronics industry but also show great potential for biomolecule detection owing to the advantages of rapid response,high sensitivity,and label-free detection.In this study,we proposed a Si nanowire field-effect transistor(Si-NW Bio-FET)device chemically modified with specific antibodies for the electrical and label-free detection of exosomes.The Si-NW FETs were fabricated by standard microelectronic processes with 45 nm width nanowires and packaged in a polydimethylsiloxane(PDMS)microfluidic channel.The nanowires were further modified with the specific CD63 antibody to form a Si-NW Bio-FET.The use of the developed Si-NW Bio-FET for the electrical and labelfree detection of exosomes was successfully demonstrated with a limit of detection(LOD)of 2159 particles/mL.In contrast to other technologies,in this study,Si-NW Bio-FET provides a unique strategy for directly quantifying and realtime detecting exosomes without labeling,indicating its potential as a tool for the early diagnosis of cancer. | Wenjie Zhao Jiawei Hu Jinlong Liu Xin Li Sheng Sun Xiaofeng Luan Yang Zhao Shuhua Wei Mingxiao Li Qingzhu Zhang Chengjun Huang | 2022 | Microsystems & Nanoengineering2022，8，3： | 1 |
| 10 | Integrated evaluation of aerosols from regional brown hazes over northern China in winter: Concentrations, sources, transformation, and mixing states显示文摘 | Li Weijun Zhou Shengzhen Wang Xinfeng Xu Zheng Yuan Chao Yu Yangchun Zhang Qingzhu Wang Wenxing | 2011 | Atmospheres2011，，9： | 1 |
| 11 | Mechanism and rate constants for complete series reactions of 19 fluorophenols with atomic H显示文摘Fluorine-containing halogenated fluorophenol may have efect as intermediate species involved in the formation of polyfluorinated dibenzo-p-dioxin/dibenzofurans(PFDDs/Fs). The mechanism for the atomic H initiated reactions with complete series of nineteen fluorophenol congeners was studies using the density functional theory. At the MPWB1K/6-31+G(d,p) level, the geometries and frequencies of reactants, transition states, and products were obtained, and the accurate energetic values were acquired at the MPWB1K/6-311+G(3df,2p) level. The rate constants were evaluated by the canonical variational transition-state theory with the small curvature tunneling contribution over a wide temperature range of 600–1000 K. The study shows that the intramolecular hydrogen-bond in the ortho-substituted FPs as well as the inductive efect of the electron-withdrawing fluorine and steric repulsion of multiple substitutions may ultimately be responsible for the relative strength of the O–H bonds in FPs. The results can be used for further studies on PFDD/Fs formation mechanism. | Rui Gao Xiaoyan Sun Wanni Yu Qingzhu Zhang Wenxing Wang | 2014 | Journal of Environmental Sciences2014，26，1： | 1 |
| 12 | Neoantigens in precision cancer immunotherapy:from identification to clinical applications显示文摘Immunotherapies targeting cancer neoantigens are safe,effective,and precise.Neoantigens can be identified mainly by genomic techniques such as next-generation sequencing and high-throughput single-cell sequencing;proteomic techniques such as mass spectrometry;and bioinformatics tools based on high-throughput sequencing data,mass spectrometry data,and biological databases.Neoantigen-related therapies are widely used in clinical practice and include neoantigen vaccines,neoantigen-specific CD8+and CD4+T cells,and neoantigen-pulsed dendritic cells.In addition,neoantigens can be used as biomarkers to assess immunotherapy response,resistance,and prognosis.Therapies based on neoantigens are an important and promising branch of cancer immunotherapy.Unremitting efforts are needed to unravel the comprehensive role of neoantigens in anti-tumor immunity and to extend their clinical application.This review aimed to summarize the progress in neoantigen research and to discuss its opportunities and challenges in precision cancer immunotherapy. | Qiao Zhang Qingzhu Jia Jing Zhang Bo Zhu | 2022 | Chinese Medical Journal2022，，11： | 1 |
| 13 | Size-resolved aerosol ionic composition and secondary formation at Mount Heng in South Central China显示文摘理解解决尺寸的喷雾器在南方华中在上面的边界层影响第二等的喷雾器形成的离子的作文和因素,分离尺寸的喷雾器样品在在山 Heng ( 1269 m asl )的顶点的春天 2009 用微孔的一致存款 impactor ( MOUDI )被收集,由 13 个无机、器官的水溶性的离子的随后的实验室分析列在后面。在 non-dust-storm 时期期间,普通下午 < 潜水艇 class= “ a-plus-plus ” > 1.8 集中是 41.8 g?? | Xinfeng WANG Wenxing WANG Likun XUE Xiaomei GAO Wei NIE Yangchun YU Yang ZHOU Lingxiao YANG Qingzhu ZHANG Tao WANG | 2013 | Frontiers of Environmental Science & Engineering2013，7，6： | 1 |
| 14 | Transcriptomics-based identification and characterization of genes related to sugar metabolism in‘Hongshuijing’pitaya显示文摘Sugar composition not only affects fruit flavor but is also an important determinant of fruit taste and consumer preference.In this study,changes in the sugar content and sugar-metabolizing enzymes were investigated from different sections of various fruit development phases of‘Hongshuijing’pitaya(Hylocereus monacanthus).Genes related to sugar metabolism were also screened by transcriptome analyses.The results indicated that glucose was the major sugar in mature pitaya fruit,and was mainly regulated by vacuolar acid invertase(VAI)and sucrose synthase(SS)(degradative direction).Sugar accumulation varied in pulp between different sections of the pitaya fruit.VAI,neutral invertase(NI)and SS(degradative direction)are crucial enzymes for sugar accumulation in pitaya.The expression of 17 genes related to sucrose metabolism obtained from seven databases[NCBI non-redundant protein database(Nr),NCBI non-redundant nucleotide sequence database(Nt),EuKaryotic Orthologous Groups(KOG),The Protein Families(Pfam),Kyoto Encyclopedia of Genes and Genomes(KEGG),Swiss-prot,and Gene Ontology(GO)]were analyzed in different pitaya pulp sections.HpVAI1 had the highest relative expression level on the 29th day after pollination(DAP).Positive correlations were found between HpVAI1 expression and VAI activity;HpNI4 and NI activity;HpSS2,HpSS5,and SS activity(synthetic direction),indicating that HpVAI1,HpNI4,and HpSS2 and HpSS5 were involved in the regulation of VAI,NI,and SS(synthetic direction),respectively.HpVAI1 and HpNI4 regulated sucrose degradation and the accumulation of glucose and fructose,while HpSS2 and HpSS5 regulated sucrose synthesis.These results suggest that HpVAI1 plays a key role in sugar metabolism during fruit development of‘Hongshuijing’pitaya.The results of this study provide new information about sugar metabolism in pitaya fruit that could help improve fruit quality and the breeding of new cultivars. | Zhike Zhang Yemiao Xing Muthusamy Ramakrishnan Canbin Chen Fangfang Xie Qingzhu Hua Jianye Chen Rong Zhang Jietang Zhao Guibing Hu Yonghua Qin | 2022 | Horticultural Plant Journal2022，8，4： | 1 |
| 15 | Heterogeneous reaction mechanism of gaseous HNO3 with solid NaCI: a density functional theory study显示文摘 | Nan ZHAO Qingzhu ZHANG Wenxing WANG | 2016 | Frontiers of Environmental Science & Engineering2016，10，5： | 1 |
| 16 | Formation of secondary organic carbon and long-range transport of carbonaceous aerosols at Mount Heng in South China显示文摘 | Shengzhen Zhou Zhe Wang Rui Gao Likun Xue Chao Yuan Tao Wang Xiaomei Gao Xinfeng Wang Wei Nie Zheng Xu Qingzhu Zhang Wenxing Wang | 2012 | Atmospheric Environment2012，，： | 1 |
| 17 | Formation of secondary organic carbon and cloud impact on carbonaceous aerosols at Mount Tai, North China显示文摘 | Zhe Wang Tao Wang Jia Guo Rui Gao Likun Xue Jiamin Zhang Yang Zhou Xuehua Zhou Qingzhu Zhang Wenxing Wang | 2011 | Atmospheric Environment2011，，： | 1 |
| 18 | A review on the transformation of birnessite in the environment:Implication for the stabilization of heavy metals显示文摘Birnessite is ubiquitous in the natural environment where heavy metals are retained and easily transformed.The surface properties and structure of birnessite change with the changes in external environmental conditions,which also affects the fate of heavy metals.Clarifying the effect and mechanism of the birnessite phase transition process on heavy metals is the key to taking effective measures to prevent and control heavy metal pollution.Therefore,the four transformation pathways of birnessite are summarized first in this review.Second,the relationship between transformation pathways and environmental conditions is proposed.These relevant environmental conditions include abiotic(e.g.,co-existing ions,pH,oxygen pressure,temperature,electric field,light,aging,pressure)and biotic factors(e.g.,microorganisms,biomolecules).The phase transformation is achieved by the key intermediate of Mn(Ⅲ)through interlayer-condensation,folding,neutralizationdisproportionation,and dissolution-recrystallization mechanisms.The AOS(average oxidation state)of Mn and interlayer spacing are closely correlated with the phase transformation of birnessite.Last but not least,the mechanisms of heavy metals immobilization in the transformation process of birnessite are summed up.They involve isomorphous substitution,redox,complexation,hydration/dehydration,etc.The transformation of birnessite and its implication on heavy metals will be helpful for understanding and predicting the behavior of heavy metals and the crucial phase of manganese oxides/hydroxides in natural and engineered environments. | Miao Shi Qingzhu Li Qingwei Wang Xuelei Yan Bensheng Li Linhai Feng Chao Wu Rongrong Qiu Hongkai Zhang Zhihui Yang Weichun Yang Qi Liao Liyuan Chai | 2024 | Journal of Environmental Sciences2024，，5： | 0 |
| 19 | Time-sensitive prediction of NO_(2) concentration in China using an ensemble machine learning model from multi-source data显示文摘Nitrogen dioxide(NO_(2))poses a critical potential risk to environmental quality and public health.A reliable machine learning(ML)forecasting framework will be useful to provide valuable information to support government decision-making.Based on the data from1609 air quality monitors across China from 2014-2020,this study designed an ensemble ML model by integrating multiple types of spatial-temporal variables and three sub-models for time-sensitive prediction over a wide range.The ensemble ML model incorporates a residual connection to the gated recurrent unit(GRU)network and adopts the advantage of Transformer,extreme gradient boosting(XGBoost)and GRU with residual connection network,resulting in a 4.1%±1.0%lower root mean square error over XGBoost for the test results.The ensemble model shows great prediction performance,with coefficient of determination of 0.91,0.86,and 0.77 for 1-hr,3-hr,and 24-hr averages for the test results,respectively.In particular,this model has achieved excellent performance with low spatial uncertainty in Central,East,and North China,the major site-dense zones.Through the interpretability analysis based on the Shapley value for different temporal resolutions,we found that the contribution of atmospheric chemical processes is more important for hourly predictions compared with the daily scale predictions,while the impact of meteorological conditions would be ever-prominent for the latter.Compared with existing models for different spatiotemporal scales,the present model can be implemented at any air quality monitoring station across China to facilitate achieving rapid and dependable forecast of NO_(2),which will help developing effective control policies. | Chenliang Tao Man Jia Guoqiang Wang Yuqiang Zhang Qingzhu Zhang Xianfeng Wang Qiao Wang Wenxing Wang | 2024 | Journal of Environmental Sciences2024，，3： | 0 |
| 20 | Nanosize-effect on the distribution of heavy metals in copper smelting dust:Based on sophisticated dust sorting approach显示文摘Dust particles emitted from smelters can be hazardous to ecosystems and humans,as they are often enriched in metallic compounds.Here,we combined multi-method mineralogical analysis with a sophisticated size sorting approach for copper smelting dust to study the nanosize-effect on heavy metal distribution,which has hitherto been underestimated.Three types of dust were collected from a copper flash smelter and then size-sorted using a Dekati low-pressure impactor.Results showed that all three samples could easily sort out nanoscale dust particles(<1μm,grades 10–2)and even those smaller than 100 nm(grades 5–2).Especially for electrostatic precipitators dust,the mass fraction of nanoscale dust(<1μm)could reach 10.71%.The presence of heavy metals(Pb,Zn,Cu,and As)and their mineral species in dust was examined at various particle sizes.It was discovered that different heavy metals are enriched on nanoparticles in specific sizes.In micron-sized particles,heavy metals are generally found in discrete phases(e.g.,CuSO_(4),PbSO_(4),and As_(2)O_(3)).In nanoscale particles,the dominant phase is Fe_(3)O_(4),while heavy metals are mostly found in lattice substitution(e.g.,CuFe_(2)O_(4)and ZnFe_(2)O_(4)).Two distinct nano-dust morphologies were found:One with irregular mesh or chain structures consisting of particles of a few nanometers,and the other with polygonal crystals in larger sizes of hundreds of nanometers.The enrichment of heavy metals in the latter morphology is more pronounced,possibly because lattice substitution of heavy metals is more likely to occur when polycrystalline particles are formed. | Ken Li Zuwu Liao Hengdi Ye Qingzhu Li Fenghua Shen Qian Li Hui Liu Qingwei Wang Xu Yan Zhang Lin Liyuan Chai | 2024 | Nano Research2024，17，1： | 0 |
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