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Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

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Chinese Journal of Chemical Engineering 2024年第3期67卷 106-116页

作者： Yifang Mi Wenqiang Wang Sen Zhang Yalong Guo Yufeng Zhao guojin sun Zhihai Cao Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing&Finishing of Textiles Ministry of EducationZhejiang Provincial Engineering Research Center for Green and Low-carbon Dyeing&FinishingZhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory for Technology in Rural Water Management of Zhejiang Province Zhejiang University of Water Resources and Electric PowerHangzhou 310018China

Cyanobacteria-based activated carbon(CBAC)was successfully prepared by pyrolysis-activation of Taihu *** the impregnation ratio and activated temperature were 2 and 800-C,respectively,the optimal CBACs possessed an ultra-high specific surface(2178.90 m^(2)·g^(-1))and plenty of micro-and meso-pores,as well as a high pore volume(1.01 cm^(3)·g^(-1)).Ascribed to ultra-high surface area,π-π interaction,electrostatic interaction,as well as hydrogen-bonding interactions,the CBACs displayed huge superiority in efficient dye *** saturated methylene blue adsorption capacity by CBACs could be as high as 1143.4 mg·g^(-1),superior to that of other reported biomass-activated *** adsorption was endothermic and modeled well by the pseudo-second-order kinetic,intra-particle diffusion,and Langmuir *** work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

关键词： Activated carbon Biomass Dye adsorption Taihu cyanobacteria

Benzo[4,5]imidazo[1,2-a]pyrimidine-based structure-inherent targeting fluorescent sensor for imaging lysosomal viscosity and diagnosis of lysosomal storage disorders

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Chinese Chemical Letters 2024年第11期35卷 454-460页

作者： Jiao Chen Zihan Zhang guojin sun Yudi Cheng Aihua Wu Zefan Wang Wenwen Jiang Fulin Chen Xiuying Xie Jianli Li Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Xi'an Key Laboratory of Functional Supramolecular Structure and MaterialsCollege of Chemistry&Materials ScienceNorthwest UniversityXi'an 710127China Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationBiomedicine Key Laboratory of Shaanxi ProvinceLab of Tissue Engineeringthe College of Life SciencesFaculty of Life Science&MedicineNorthwest UniversityXi'an 710069China The Second Affiliated Hospital of Xi'an Jiaotong University Xi'an 710004China

Benzo[4,5]imidazo[1,2-a]pyrimidine-based derivatives play crucial roles in medicines,pesticides,tracers and photoelectric ***,their synthesis approach still needs to be optimized,and their fluorescent properties in intracellular microenvironment are ***,a Cu(II)-catalyzed cascade coupling cyclization reaction was successfully developed to synthesize benzo[4,5]imidazo[1,2-a]pyrimidine scaffold with mild reaction conditions,broad substrate scopes and high *** a system study,we found that compound 4aa displayed an optimal viscosity-specific response with remarkable fluorescence enhancement(102-fold)for glycerol at 490 ***,4aa possessed excellent structure-inherent targeting(SIT)capability for lysosome(P=0.95)with high p H stability and large Stokes ***,4aa was validated for its effectiveness in diagnosing lysosomal storage disorders(LSD)in living *** 4aa also showed its potential to map the micro-viscosity and its metabolism process in *** work not only affords an efficient protocol to fabricate benzo[4,5]imidazo[1,2-a]pyrimidine derivatives,reveals this skeleton has excellent SIT features for lysosome,but also manifests that 4aa can serve as a practical tool to monitor lysosomal viscosity and diagnose LSD.

关键词： Fluorescent sensor Benzoimidazo[1,2-a]pyrimidine Lysosome Viscosity Lysosomal storage disorders Structure-inherent targeting Fluorescence imaging

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超声对竹叶黄酮浸取的影响

化工进展 2002年第z1期21卷 9-11页

作者：孙国金何潮洪浙江大学化学工程系杭州310027 浙江大学化学工程系杭州310027

采用超声辅助浸取毛竹叶中的黄酮类化合物(以水为溶剂),考察了超声强度、作用时间等因素对提取速率、得率的影响,发现超声能提高提取速率,对最终黄酮得率也有提高,提取速率随着超声功率增大有所增加.

关键词：超声竹叶黄酮浸取

Characterizing PM<sub>2.5</sub>Pollution of a Subtropical Metropolitan Area in China

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Atmospheric and Climate Sciences 2013年第1期3卷 100-110页

作者： guojin sun Lin Yao Li Jiao Yao Shi Qingyu Zhang Mengna Tao Guorong Shan Yi He Department of Chemical and Biological Engineering Zhejiang University Hangzhou China Department of Chemical and Biological Engineering Zhejiang University Hangzhou China&Zhejiang Environmental Protection Agency Hangzhou China Environmental Monitoring Center Hangzhou China

The chemical and physical characteristics of PM2.5, especially their temporal and geographical variations, have been explored in metropolitan Hangzhou area (China) by a field campaign from September 2010 to July 2011. Annual average concentrations of PM2.5 and PM10 during non-raining days were 106 - 131 μg.m-3 and 127 - 158 μg.m-3, respectively, at three stations in urban breathing zones, while corresponding concentrations of PM2.5 and PM10 at an urban background station (16 mabove ground level in a park) were 78 and 104 μg.m-3, respectively. For comparison, the annual average PM10 concentration at a suburban station (5 mAGL) was 93 μg.m-3. Detailed chemical analyses were also conducted for all samples collected during the campaign. We found that toxic metals (Cd, As, Pb, Zn, Mo, Cu, Hg) were highly enriched in the breathing zones due to anthropogenic activities, while soluble ions (, , ) and total carbon accounted for majority of PM2.5 mass. Unlike most areas in China where sulfate was several times of nitrate in fine PM, nitrate was as important as sulfate and highly correlated with ammonium during the campaign. Thus, a historical shift from sulfate-dominant fine PM to nitrate-dominant fine PM was documented.

关键词： PM Pollution PM2.5 Composition Breathing Zone Air Pollution Measurements Personal Exposure

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优化中国企业对欧盟市场的出口进入方式

山东师范大学学报（人文社会科学版） 2008年第2期53卷 153-157页

作者：张淑静孙国瑾北京师范大学管理学院北京102218 山东财政学院外语学院山东济南250014

中国对欧盟的巨额贸易顺差令欧盟感到不满,欧盟对华反倾销措施、种类繁杂的技术性贸易壁垒是中国企业面临的主要问题,另外,被较多采用的间接出口方式不利于中国企业对欧盟出口的可持续发展。要想优化对欧盟市场的出口进入方式,中国企业... 详细信息

中国对欧盟的巨额贸易顺差令欧盟感到不满,欧盟对华反倾销措施、种类繁杂的技术性贸易壁垒是中国企业面临的主要问题,另外,被较多采用的间接出口方式不利于中国企业对欧盟出口的可持续发展。要想优化对欧盟市场的出口进入方式,中国企业要深入了解欧盟市场对内自由、对外统一的实质,熟悉欧盟共同商业政策,提供符合欧盟标准的商品,积极应对、合理规避欧盟反倾销措施,采用间接出口与直接出口相结合并且更多采用直接出口的方法。

关键词：出口进入方式关税同盟共同商业政策反倾销欧盟标准

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基于水足迹的嘉兴市农业产业结构优化模型

浙江大学学报（理学版） 2022年第5期49卷 613-622页

作者：秦智雅俞洁孙国金王飞儿浙江大学环境与资源学院浙江杭州310058 浙江省环境监测中心浙江杭州310012 浙江水利水电学院浙江杭州310018 浙江生态文明研究院浙江安吉313300

农业产业结构是决定农业用水效率的重要因素之一。相较于传统用水评价,基于水足迹的评价能更全面地反映水资源的过程消耗。在对嘉兴市农业蓝水、绿水及灰水足迹核算基础上,用农业水资源压力指数(AWSI)评估区域农业用水压力,构建了基于... 详细信息

农业产业结构是决定农业用水效率的重要因素之一。相较于传统用水评价,基于水足迹的评价能更全面地反映水资源的过程消耗。在对嘉兴市农业蓝水、绿水及灰水足迹核算基础上,用农业水资源压力指数(AWSI)评估区域农业用水压力,构建了基于水足迹的农业产业结构优化模型,分析了节水型、均衡型和发展型3种农业产业结构调整情景。结果表明,嘉兴市农业水足迹以绿水为主,蓝水足迹、绿水足迹和灰水足迹的占比分别为11.6%,51.7%和36.8%,AWSI为0.45,存在较高的水资源压力;通过调整产业结构,3种目标情景下的农业水足迹及经济效益均实现了不同程度优化,AWSI分别降低4.54%,3.89%和0.74%,有效减轻区域水资源压力。研究表明,通过基于水足迹的农业产业结构调整,有效提高了区域集约化用水效率,减轻了用水压力。研究可为农业水资源管理决策提供参考。

关键词：农业水足迹产业调整多目标优化

原位合成TiC_P/Fe复合材组织结构和力学性能的研究

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热加工工艺 2015年第22期44卷 75-78,81页

作者：孙国进胡士廉苏广才浙江大学材料科学与工程学院浙江杭州310027 中国兵器科学研究院宁波分院浙江宁波315103 广西大学材料科学与工程学院广西南宁530004

采用原位反应法制备了TiC_p/Fe复合材料并分析了主要合金元素对材料微观组织的影响。利用正交实验法,研究了元素Ti、C和Si对TiC_p/Fe复合材料组织结构和力学性能的影响。结果表明,Ti和C元素对材料的组织结构和力学性能的影响最为显著,S... 详细信息

采用原位反应法制备了TiC_p/Fe复合材料并分析了主要合金元素对材料微观组织的影响。利用正交实验法,研究了元素Ti、C和Si对TiC_p/Fe复合材料组织结构和力学性能的影响。结果表明,Ti和C元素对材料的组织结构和力学性能的影响最为显著,Si元素次之。随着Ti和C含量的升高,材料的组织结构和力学性能得到改善,Ti、C含量再次增加则出现力学性能恶化的趋势。分析结果得出:Ti、C和Si的最佳质量分数分别为6%、2.3%和1.0%。

关键词：原位反应 TiCp/Fe复合材料组织结构力学性能

双液淬火对9Cr2Mo钢辊皮组织与硬度的影响

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金属热处理 2022年第3期47卷 88-91页

作者：孙国进郜志文崔效炎郜可坤孙力河南工学院材料科学与工程学院河南新乡453003 河南精诚汽车零部件有限公司河南新乡453000

探讨了双液淬火冷却工艺对9Cr2Mo钢辊皮表面组织、硬度的影响,得到了最佳双液淬火冷却工艺。结果表明,单液水冷淬火后表面组织为粗大的回火马氏体,水油双液淬火后回火马氏体晶粒明显细化,并且形成了少量的贝氏体和残留奥氏体。双液淬火... 详细信息

探讨了双液淬火冷却工艺对9Cr2Mo钢辊皮表面组织、硬度的影响,得到了最佳双液淬火冷却工艺。结果表明,单液水冷淬火后表面组织为粗大的回火马氏体,水油双液淬火后回火马氏体晶粒明显细化,并且形成了少量的贝氏体和残留奥氏体。双液淬火处理后,辊皮外表面硬度分布为中部硬度高,边部硬度低,使辊皮的使用寿命得到了明显提高。Φ750 mm的9Cr2Mo钢辊皮水油双液淬火最佳冷却工艺为入水前炉外预冷时间300 s,水冷-油冷之间预冷时间控制在60~180 s。

关键词： 9Cr2Mo钢辊皮双液淬火硬度组织

全自动引伸计在超高强钢规定塑性延伸强度R_p测试中的应用

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兵器材料科学与工程 2016年第5期39卷 116-119页

作者：孙远东黄建文王凡孙国进徐军中国兵器科学研究院宁波分院内蒙包头014034

运用对比分析的方法比较人工装夹电子引伸计与全自动引伸计在超高强度钢Rp测试中的优劣,得出全自动引伸计在超高强钢规定塑性延伸强度Rp的测试中具有准确性高和重复性好的特点。

关键词：人工装夹电子引伸计全自动引伸计超高强钢规定塑性延伸强度Rp