检索结果-南通市图书馆

Science China Chemistry 2011年第6期54卷 998-1003页

作者： fan jing, zhu guifen, wang haibo & wang jianji henan key laboratory for environmental pollution control key laboratory for Yellow and Huai River Water environmental and pollution control, Ministry of Education School of Chemical and environmental Sciences, henan Normal University, Xinxiang 453007, China 1. henan key laboratory for environmental pollution control key laboratory for Yellow and Huai River Water environmental and pollution control Ministry of Education School of Chemical and environmental Sciences Henan Normal University Xinxiang 453007 China

Trace of Pb(Ⅱ) has been on-line separated and enriched from environmental samples and wastewater by using the self-made alizarin violet functionalized silica gel micro-column coupling with a sequential injection sampling technology. The determination is based on the color reaction of Pb(Ⅱ) with iodide and crystal violet to form an ionic association complex in the presence of polyvinyl alcohol and hydrochloric acid. The use of the microcolumn can prevent the interference of most familiar metal ions, and therefore improve the selectivity and sensitivity of this analytical technique. The proposed method was used for the determination of Pb(Ⅱ) in environmental samples and wastewater. No statistically significant difference was observed between the results determined by the present method and atomic absorption spectrometry.

关键词： on-line solid-phase extraction sequential injection lead environmental sample alizarin violet functionalized silica gel

Chemical characteristics and source apportionment of PM_(2.5) in a petrochemical city: Implications for primary and secondary carbonaceous component

在线全文

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2021年第5期33卷 322-335页

作者： Guangxuan Yan Puzhen Zhang Jie Yang jingwen Zhang guifen zhu Zhiguo Cao jing fan Zirui Liu Yuesi wang School of Environment Henan Normal UniversityKey Laboratory for Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlXinxiang 453007China State key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of ScienceBeijing 100029China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of ScienceXiamen 361021China University of Chinese Academy of Science Beijing 100049China

To study the pollution features and underlying mechanism of PM_(2.5) in Luoyang, a typical developing urban site in the central plain of China, 303 PM_(2.5) samples were collected from April 16 to December 29, 2015 to analyze the elements, water soluble inorganic ions, organic carbon and elemental carbon. The annual mean concentration of PM_(2.5) was 142.3 μg/m^(3), and 75% of the daily PM_(2.5) concentrations exceeded the 75 μg/m^(3). The secondary inorganic ions, organic matter and mineral dust were the most abundant species, accounting for 39.6%, 19.2% and 9.3% of the total mass concentration, respectively. But the major chemical components showed clear seasonal dependence. SO_(4)^(2-) was most abundant specie in spring and summer, which related to intensive photochemical reaction under high O_3 concentration. In contrast, the secondary organic carbon and ammonium while primary organic carbon and ammonium significantly contributed to haze formation in autumn and winter, respectively. This indicated that the collaboration effect of secondary inorganic aerosols and carbonaceous matters result in heavy haze in autumn and winter. Six main sources were identified by positive matrix factorization model: industrial emission, combustion sources, traffic emission, mineral dust, oil combustion and secondary sulfate, with the annual contribution of 24%, 20%, 24%, 4%, 5% and 23%, respectively. The potential source contribution function analysis pointed that the contribution of the local and short-range regional transportation had significant impact. This result highlighted that local primary carbonaceous and precursor of secondary carbonaceous mitigation would be key to reduce PM_(2.5) and O_3 during heavy haze episodes in winter and autumn.

关键词： PM_(2.5) Seasonal variations Positive matrix factorization Emission sources

UiO-66/CoSO4复合材料对环境中盐酸左氧氟沙星的高效去除

在线全文

学校读者我要写书评

暂无评论

化学学报 2019年第5期77卷 434-441页

作者：朱桂芬陈乐田程国浩赵娟杨灿张耀宗王醒樊静河南师范大学环境学院黄淮水环境与污染防治教育部重点实验室河南省环境污染控制重点实验室

以UiO-66为前驱体制得UiO-66/CoSO4复合材料,借助扫描电子显微镜、透射电子显微镜、元素分析和比表面积分析等手段对复合材料的微观形貌和结构进行表征,采用吸附平衡实验,系统考察该复合材料的吸附性能.结果表明,在相同条件下UiO-66/Co... 详细信息

以UiO-66为前驱体制得UiO-66/CoSO4复合材料,借助扫描电子显微镜、透射电子显微镜、元素分析和比表面积分析等手段对复合材料的微观形貌和结构进行表征,采用吸附平衡实验,系统考察该复合材料的吸附性能.结果表明,在相同条件下UiO-66/CoSO4复合材料比UiO-66对盐酸左氧氟沙星的去除率提高26.5%,且复合材料在30min对盐酸左氧氟沙星的吸附达到平衡,最大吸附容量为108.4mg·g^-1,其吸附特性符合假二级动力学模型.该UiO-66/CoSO4复合材料制备过程简单,对实际环境水样和土样中盐酸左氧氟沙星的去除率在94.7%以上,且经过5次再生循环使用后,吸附效率无明显下降.

关键词： UiO-66/CoSO4 盐酸左氧氟沙星环境样品去除

金沙江攀枝花河段土壤重金属污染状况及生态风险评价

在线全文

学校读者我要写书评

暂无评论

河南师范大学学报（自然科学版） 2022年第4期50卷 91-100页

作者：史鹏朱长军王世岩樊皓吴比刘畅李步东河北工程大学能源与环境工程学院河北邯郸056038 中国水利水电科学研究院北京100038 河海大学水文水资源与水利工程科学国家重点实验室南京210009 长江水资源保护科学研究所武汉430051

为清晰了解金沙江攀枝花河段土壤重金属污染状况,以丰、平、枯不同水期下金沙江攀枝花河段岸边土壤为研究对象,采用单因子污染指数法、内梅罗综合污染指数法以及潜在生态风险指数法对金沙江攀枝花河段土壤重金属污染状况以及可能存在的... 详细信息

为清晰了解金沙江攀枝花河段土壤重金属污染状况,以丰、平、枯不同水期下金沙江攀枝花河段岸边土壤为研究对象,采用单因子污染指数法、内梅罗综合污染指数法以及潜在生态风险指数法对金沙江攀枝花河段土壤重金属污染状况以及可能存在的生态风险进行评价,并提出了相关风险管控建议.研究结果表明,丰、平、枯不同水期下V,Cd,Cu,Ni等重金属质量含量均值超过四川省表层土壤背景值;丰水期与枯水期下重金属内梅罗综合污染指数均值分别为3.10,3.14,综合污染等级达到Ⅴ级重度污染,平水期下重金属内梅罗综合污染指数均值为2.94,综合污染等级达到Ⅳ级中度污染,土壤中Cd,V污染值得进一步关注;丰、平、枯不同水期下金沙江攀枝花河段岸边土壤重金属的潜在生态风险系数均值分别为144.04,110.88和147.15,总体呈现轻微生态风险,重金属Cd存在的危害较为严重,潜在生态风险指数分别为103.92,84.81和111.71,呈现强生态风险,Cd存在的生态风险值得进一步去关注.

关键词：土壤重金属污染污染评价生态风险

在线全文

学校读者我要写书评

暂无评论

长江经济带生态修复示范关键技术及其应用

中国地质 2021年第5期48卷 1305-1333页

作者：姜月华倪化勇周权平程知言段学军朱志敏吴吉春任海彦范晨子杨晋炜陈超胡建王晓龙姜夏烨刘永兵杨海郭威冯乃琦魏广庆金阳杨辉刘林梅世嘉张鸿陈澎军袁继海齐秋菊吕劲松顾轩刘鹏中国地质调查局南京地质调查中心江苏南京210016 自然资源部流域生态地质过程重点实验室江苏南京210016 中国地质科学院探矿工艺研究所四川成都611734 江苏省地质矿产勘查局江苏南京210018 中国科学院南京地理与湖泊研究所江苏南京210008 中国地质科学院矿产综合利用研究所四川成都610041 南京大学江苏南京210023 南京农业大学江苏南京210095 国家地质实验测试中心北京100037 江苏省有色金属华东地质勘查局江苏南京210007 中国地质科学院郑州矿产综合利用研究所河南郑州450006 苏州南智传感科技有限公司江苏苏州215124

围绕长江大保护,笔者近年探索形成滨海盐碱地、长江滨岸湿地、沿江化工污染场地、重金属污染场地和废弃矿山等5种类型生态修复示范关键技术,取得重要进展和应用成效:(1)探索形成南通滨海盐碱地“工程、结构、生物和农艺改良”等关键技... 详细信息

围绕长江大保护,笔者近年探索形成滨海盐碱地、长江滨岸湿地、沿江化工污染场地、重金属污染场地和废弃矿山等5种类型生态修复示范关键技术,取得重要进展和应用成效:(1)探索形成南通滨海盐碱地“工程、结构、生物和农艺改良”等关键技术体系,建立了盐碱地水-盐运移环境实时动态监测体系,实现海水稻、玉米和油菜等系列农产品产业化,有效服务沿海地区盐碱地优质利用与国土空间规划。(2)提出江苏启东长江沿江湿地“生境优化、植物优选、多样性调控”综合生态修复技术,形成湿地休闲观光区、湿地生物多样性保护区和湿地尾水深度净化区等三大生态功能区,修复成果取得较好生态与社会效益。(3)创新有机污染探测技术,查明某典型化工园区地下“隐性”污染,精确圈定主要污染物深度,明确以硝基苯、苯、苯胺等为主的污染物类型,提出了污染修复深化建议,得到当地市政府、环保部门采纳建议方案,有效支撑服务有机化工废弃场地再开发。(4)研发耐镉转基因特有植物材料与高效修复功能微生物,探索形成沿江高镉土壤微生物-植物互作修复模式,为下一步微生物改良剂研制和规模化修复奠定重要基础。(5)形成云南安宁磷矿尾矿堆场生态修复和四川攀枝花钒钛磁铁矿尾矿资源化、减量化利用关键技术,有力支撑废弃矿山生态保护修复和尾矿资源化利用。

关键词：生态修复盐碱地湿地有机污染镉污染尾矿废弃矿山地质调查工程长江经济带