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Chemical components of PM_(2.5)in different seasons in Harbin,China

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Particuology 2023年第5期76卷 113-121页

作者： qinqin yu Jiumeng Liu Yingjie Zhong Xubing Cao yulong Wang yuan Cheng State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China

The seasonal characteristics of fine particulate matter(PM_(2.5))were investigated from October 2020 to April 2021(spreading fall,winter and spring)in Harbin,a city located in northeast *** mass concentrations of PM_(2.5)in winter were significantly higher than those in fall and ***,our results indicated that various aerosol species had obvious *** proportions of secondary components were higher in winter than other two *** contrast,the ratios of nitrate to sulfate(NO_(3)^(-)/SO_(4)^(2-))showed lower levels in winter,which was because both the ratios of nitrogen dioxide to sulfur dioxide(NO_(2)/SO_(2))and the ratios of nitrogen oxidation ratio to sulfur oxidation ratio(NOR/SOR)exhibited lower values in winter than in fall and *** PM_(2.5)increased,the NO_(3)^(-)/SO_(4)^(2-)ratios showed increasing trends in all three seasons,which was mainly attributed to the increase of NOR/SOR ratios in fall and spring,and the increase of both NO_(2)/SO_(2)and NOR/SOR ratios in *** result highlighted that nitrate was more important than sulfate as a driver for the growth of PM_(2.5)during the period of heavy air ***,the sources of organic aerosol(OA)in different seasons were also distinctly ***,the sum of biomass burning OA(BBOA)and secondary OA(SOA)contributed>70%of OA in three *** fractional contributions of BBOA to total OA,notably,exhibited higher levels in fall and spring,because of intensive open agricultural *** SOA fractions in OA were larger in winter,likely due to higher relative humidity which facilitated the secondary for-mation.A large increase in the proportions of BBOA was observed during polluted days in fall and spring compared to clean *** comparison,during heavily-polluted periods,secondary formation made a dominant contribution to organic matter in winter.

关键词： PM_(2.5) Seasonal characteristics Sulfate Nitrate Biomass burning Secondary formation

A New Strategy for Improving the Efficiency of Low-temperature Selective Catalytic Reduction of NOx with CH4via the Combination of Non-thermal Plasma and Ag2O/TiO2 Photocatalyst

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Chemical Research in Chinese Universities 2019年第6期35卷 1062-1069页

作者： WANG Hui WANG Jiafeng ZHANG Lei yu qinqin CHEN Zewen WU Shengji College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018P.R.China School of Chemistry Chemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070P.R.China

In the present work,a remarkable combination of non-thermal plasma and photocatalyst was developed to widen the operating temperature window of selective catalytic reduction(SCR)of NOx with CH4,especially to improve the low-temperature removal efficiency of *** was shown that the operating temperature window was significantly *** all the catalysts prepared,1%Ag2O/TiO2 showed the highest catalytic activity for NOx removal due to the utilization of near ultraviolet *** conversion of NOx to N2 over the in-plasma 1%Ag2O/TiO2 photocatalyst at 60 and 300℃ could achieve 31.8%and 53.0%,*** combination mode of plasma and catalyst affected NOx removal efficiency greatly,the in-plasma catalysis outperformed the post-plasma catalytic mode remarkably,signifying the contribution of photocatalytic processes on the ***,the characterizations of the catalyst demonstrated that the morphology and structure of the Ag2O/TiO2 catalyst were unchanged throughout the non-thermal plasma and photocatalytic processes,implying the superior stability of the catalyst.

关键词： Non-thermal plasma,Photocatalyst,NOx Ag2O/TiO2 CH4

Clathrin-Mediated Auxin Efflux and Maxima Regulate Hypocotyl Hook Formation and Light- Stimulated Hook Opening in Arabidopsis

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Molecular Plant 2016年第1期9卷 101-112页

作者： qinqin yu Ying Zhang Juan Wang Xu Yan Chao Wang Jian Xu Jianwei Pan College of Chemistry and Life Sciences Zhejiang Normal University Jinhua 321004 China Department of Biological Sciences NUS Centre for Biolmaging Sciences National University of Singapore 14 Science Drive 4 Singapore 117543 Singapore

The establishment of auxin maxima by PIN-FORMED 3 （PIN3）- and AUXIN RESISTANT l/LIKE AUX1 （LAX） 3 （AUX1/LAX3）-mediated auxin transport is essential for hook formation in Arabidopsis hypocotyls. Until now, however, the underlying regulatory mechanism has remained poorly understood. Here, we show that loss of function of clathrin light chain CLC2 and CLC3 genes enhanced auxin maxima and thereby hook curvature, alleviated the inhibitory effect of auxin overproduction on auxin maxima and hook curva- ture, and delayed blue light-stimulated auxin maxima reduction and hook opening. Moreover, pharmaco- logical experiments revealed that auxin maxima formation and hook curvature in clc2 clc3 were sensitive to auxin efflux inhibitors 1-naphthylphthalamic acid and 2,3,5-triiodobenzoic acid but not to the auxin influx inhibitor 1-naphthoxyacetic acid. Live-cell imaging analysis further uncovered that loss of CLC2 and CLC3 function impaired PIN3 endocytosis and promoted its lateralization in the cortical cells but did not affect AUX1 localization. Taken together, these results suggest that clathrin regulates auxin maxima and thereby hook formation through modulating PIN3 localization and auxin efflux, providing a novel mechanism that integrates developmental signals and environmental cues to regulate plant skotomorphogenesis and photomorphogenesis.

关键词： auxin maxima clathrin hook formation hypocotyl Arabidopsis

Formation of secondary inorganic aerosol in a frigid urban atmosphere

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Frontiers of Environmental Science & Engineering 2022年第2期16卷 39-50页

作者： yuan Cheng qinqin yu Jiumeng Liu Youwen Sun Linlin Liang Zhenyu Du Guannan Geng Wanli Ma Hong Qi Qiang Zhang Kebin He State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China State Key Laboratory of Severe Weather&CMA Key Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological SciencesBeijing 100081China National Research Center for Environmental Analysis and Measurement Environmental Development Center of the Ministry of Ecology and EnvironmentBeijing 100029China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Earth System Science Tsinghua UniversityBeijing 100084China

Formation of secondary inorganic aerosol(SIA)was investigated during a six-month long heating season in Harbin,*** sulfate formation was observed at high relative humidity(RH),with the same threshold RH(80%)for both colder and warmer measurement *** to wintertime results from Beijing,the threshold RH was considerably higher in Harbin,whereas the RH-dependent enhancement of sulfur oxidation ratio(SOR)was less *** addition,the high RH events were rarely encountered,and for other periods,the SOR were typically as low as~***,the sulfate formation was considered inefficient in this *** excluding the several cases with high RH,both SOR and the nitrogen oxidation ratio(NOR)exhibited increasing trends as the temperature increased,with the increase of NOR being *** nitrate to sulfate ratio tended to increase with increasing temperature as *** on a semi-quantitative approach,this trend was attributed primarily to the temperature-dependent variations of precursors including SO_(2) and NO_(2).The influence of biomass burning emissions on SIA formation was also *** stronger impact of biomass burning,an enhancement in NOR was observed whereas SOR was largely *** different patterns were identified as the dominant driver of the larger nitrate to sulfate ratios measured at higher concentrations of fine particulate matter.

关键词： Haze Sulfate Nitrate Heterogeneous chemistry Biomass burning

软黏土地区地下连续墙施工对邻近地铁隧道的影响

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城市轨道交通研究 2023年第S2期26卷 79-85页

作者：俞钦钦董宇杭州铁路设计院有限责任公司杭州310004 中铁上海设计院集团有限公司上海200070

为探究软黏土地区地下连续墙施工对邻近地铁隧道的影响,现选取近邻某地区已运营地铁隧道的基坑实测数据并结合数值模拟进行分析。结果表明:隧道竖直位移和水平位移都随着隧道与基坑的距离的增加而呈现出阶梯状下降趋势,地连墙施工对隧... 详细信息

为探究软黏土地区地下连续墙施工对邻近地铁隧道的影响,现选取近邻某地区已运营地铁隧道的基坑实测数据并结合数值模拟进行分析。结果表明:隧道竖直位移和水平位移都随着隧道与基坑的距离的增加而呈现出阶梯状下降趋势,地连墙施工对隧道左线的水平位移的影响范围是0.71H(H为成槽深度),对竖直位移的影响范围是0.75H,有限元数值模拟得到的影响范围分别是0.75H和0.8H;地连墙施工时地铁隧道产生“横鸭蛋”式变形,数值模拟得到的结果能较好地拟合实测的数据。研究成果对类似工程的设计、施工和监测等能提供参考。

关键词：地铁隧道地下连续墙(地连墙) 沉降水平位移

CNQDs/Ag_(3)PO_(4)/g-C_(3)N_(4)复合光催化材料的制备及其对双酚A的降解性能

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环境工程学报 2022年第1期16卷 101-111页

作者：伍倩于芹芹戴友芝湘潭大学环境与资源学院湘潭411100

采用溶剂热法和原位沉淀法制备了CNQDs/Ag_(3)PO_(4)/g-C_(3)N_(4)三元复合光催化剂,通过SEM、TEM、XRD、FT-IR、XPS、BET等手段对其进行了表征;以BPA为目标污染物,考察了pH、BPA初始浓度、催化剂投加量及光照强度等因素对BPA去除效果... 详细信息

采用溶剂热法和原位沉淀法制备了CNQDs/Ag_(3)PO_(4)/g-C_(3)N_(4)三元复合光催化剂,通过SEM、TEM、XRD、FT-IR、XPS、BET等手段对其进行了表征;以BPA为目标污染物,考察了pH、BPA初始浓度、催化剂投加量及光照强度等因素对BPA去除效果的影响;同时,对该三元复合催化剂光催化降解BPA的机制进行了探讨。结果表明,CNQDs/Ag_(3)PO_(4)/g-C_(3)N_(4)在反应60 min时对BPA的去除率可以达到100%,分别为g-C_(3)N_(4)、Ag_(3)PO_(4)、Ag_(3)PO_(4)/g-C_(3)N_(4)的7.74、2.09和1.38倍;光催化降解BPA的最佳反应条件为:pH为11、污染物质量浓度为5 mg·L^(−1)、催化剂投加量为1 g·L^(−1)、光照强度为500 W;在光催化降解BPA的过程中,主要反应活性物种为·O_(2)^(−)和h^(+)。基于GC-MS对反应过程中间产物的检测结果,推测出BPA可能的2种降解路径:一是BPA先转化为单环有机物,再转化为二氧化碳和水;二是BPA经活性物种直接开环形成简单烷烃,最后氧化成二氧化碳和水。

关键词： CNQDs/Ag_(3)PO_(4)/g-C_(3)N_(4) 光催化双酚A 废水处理

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中外石油天然气行业会计准则的对比

涉外税务 2008年第10期 65-68页

作者：刘秋东于勤勤中海油田服务股份有限公司北京100010 中国科学院研究生院管理学院北京100080

针对石油天然气行业的特点,许多国家制定了本国的石油天然气准则。本文对比分析了国际财务报告准则、美国和我国石油天然气会计准则的内容,就我国石油天然气会计准则的进一步完善提出了几点建议。

关键词：石油天然气会计准则成果法完全成本法

凝聚期刊特色发挥资源优势——《长江流域资源与环境》的办刊实践

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编辑学报 2008年第1期20卷 64-66页

作者：于琴琴刘典伟长江流域资源与环境编辑部武汉430071

从坚持办刊宗旨和期刊特色,充分利用科学图书馆的文献和信息资源提高期刊内涵质量,开展多元化的文献信息服务,深化期刊工作等方面介绍《长江流域资源与环境》的办刊理念和实践,以期为科技期刊尤其是科学图书馆主办的科技期刊的发展提供... 详细信息

从坚持办刊宗旨和期刊特色,充分利用科学图书馆的文献和信息资源提高期刊内涵质量,开展多元化的文献信息服务,深化期刊工作等方面介绍《长江流域资源与环境》的办刊理念和实践,以期为科技期刊尤其是科学图书馆主办的科技期刊的发展提供参考。

关键词：期刊特色信息资源文献信息服务显示度

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锐齿槲栎壳斗对镉的吸附效果与机理研究

环境工程 2014年第11期32卷 49-55,59页

作者：喻琴琴靖德兵可欣首都师范大学生命科学学院北京100048 湖北省襄阳市林业局湖北襄阳114400

以锐齿槲栎壳斗为材料,对镉进行吸附研究。结果表明:锐齿槲栎壳斗对Cd2+的吸附过程符合伪二级动力学模型和Langmuir等温吸附模型,适宜pH值为4.0~5.0,吸附平衡时间短(10 min),吸附容量高达37.843 mg/g;壳斗充分吸附后,水体Cd2+的去除率达... 详细信息

以锐齿槲栎壳斗为材料,对镉进行吸附研究。结果表明:锐齿槲栎壳斗对Cd2+的吸附过程符合伪二级动力学模型和Langmuir等温吸附模型,适宜pH值为4.0~5.0,吸附平衡时间短(10 min),吸附容量高达37.843 mg/g;壳斗充分吸附后,水体Cd2+的去除率达93%,理论残留浓度低至5.023 mg/L。物理吸附效应仅占总吸附量的2.18%;离子交换是主要吸附原因,参与交换的主要离子为Mg2+、Ca2+、K+和Na+;络合/螯合反应也是主要的吸附作用之一,参与反应的官能团主要是—COO-、—C-O、—OH、—NH。

关键词：锐齿槲栎壳斗等温吸附模型物理解析离子交换红外光谱分析