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Simple fabrication of carboxymethyl cellulose and k-carrageenan composite aerogel with efficient performance in removal of fluoroquinolone antibiotics from water

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Frontiers of Environmental Science & Engineering 2022年第10期16卷 105-118页

作者： Na Li boqiang gao Ran Yang Hu Yang State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Department of Environmental Science School of Tropical and Laboratory MedicineHainan Medical UniversityHaikou 571199China

3D composite aerogels(CMC-CG)composed of carboxymethyl cellulose andκ-carrageenan were designed and fabricated using the one-pot synthesis *** optimized CMC-CG showed a good mechanical property and a high swelling ratio due to its superior textural properties with a proper chemically cross-linked interpenetrating network ***-CG was utilized for the removal of various fluoroquinolones(FQs)from water and exhibited high adsorption performance because of effective electrostatic attraction and hydrogen bonding ***(CIP),a popular FQ,was used as the *** optimized CMC-CG had a theoretically maximal CIP uptake of approximately 1.271 mmol/g at the pH of *** adsorption capacity of CMC-CG was improved in the presence of some cations,Cu2+and Fe3+ions,at a low concentration through the bridging effect but was reduced at a high *** investigation of adsorption mechanisms,based on the adsorption kinetics,isotherms and thermodynamic study,Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy analyses before and after adsorption,and changes in the adsorption performance of CMC-CG toward two molecular probes,further indicated that electrostatic attraction was the dominant interaction rather than hydrogen bonding in this ***-CG after saturated adsorption of CIP could be easily regenerated using a dilute NaCl aqueous solution and reused ***,the disused aerogel could still be reused as a new adsorbent for effective adsorption of Cu2+***,this study suggested the promising applications of this composite aerogel as an eco-friendly,cost-effective,and recyclable adsorbent for thie efficient removal of FQs from water.

关键词： Composite aerogel of carboxymethy lcellulose andκ-carrageenan Fluoroquinolone antibiotics Adsorption performance Coexisting substances Adsorption mechanism Reusability

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The role of periphytes in the shift between macrophyte and phytoplankton dominated systems in a shallow,eutrophic lake (Lake Taihu,China)

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Science China(Life Sciences) 2006年第6期49卷 597-602页

作者： QIN boqiang SONG Yuzhi gao Guang Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing 210008 China Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing 210008 China Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing 210008 China

Based on experiments of periphyte response to different trophic levels and their impact on macrophyte production,it was found that the periphyte biomass increased with the nutrient con-centrations. Increased trophic level and periphyte biomass resulted in decreased macrophyte photo-synthesis. It was suggested that the periphytes could cause resilience and hysteresis in the system shifts between macrophyte and phytoplankton domination. Other factors,such as fish farming,storm induced waves and mechanical destruction,and high water levels could be the perturbations during the system shifts,but these are not the key factors. Instead,the nutrient loading and periphyte abundance could determine the shift in lake ecosystem between macrophyte and phytoplankton domination. This finding could theoretically elucidate the mechanism of ecosystem shifts between macrophyte and phytoplankton domination.

关键词： shallow lake, eutrophication, ecosystem shift, macrophyte, phytoplankton.

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A green strategy for porous biochar fabrication with superior capacity for peroxydisulfate activation to degrade sulfadiazine:the cooperative role of C-sp^(3) and specific surface area

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Biochar 2023年第1期5卷 419-436页

作者： Shulian Wang Yan Huang Shuanglong Ma Sihui Zhan Jingzhen Wang boqiang gao Xiaodan Tang Qiuhui Zhu Shengjun Xu Xuliang Zhuang College of Resources and Environmental Sciences Henan Agricultural UniversityZhengzhou 450002People’s Republic of China Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education) College of Environmental Science and EngineeringNankai UniversityTianjin 300071People’s Republic of China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences18 Shuangqing RoadHaidian DistrictBeijing 100085People’s Republic of China

Metal-free porous biochars are popularly utilized as catalysts for peroxydisulfate(PDS)*** enhancement effect of PDS activation of porous biochars fabricated by employing both hard template and alkali metal activating agent has not been explored *** addition,the role of the inherent carbon defect in PDS activation has not been clearly ***,a series of carbonaceous catalysts were fabricated using a sole template(KCl),a sole activating agent(Na_(2)S_(2)O_(3))or a combination of template and activating agent(KCl/Na_(2)S_(2)O_(3),KCl/KHCO_(3),KCl/NaHCO_(3),and KCl/Na_(2)C_(2)O_(4)),to systematically investigate the effect of specific surface area(SSA)and intrinsic defect of porous biochar on its PDS activation *** biochar synthesized by KCl and Na_(2)S_(2)O_(3)(SK-C)exhibited the optimum degradation *** SK-C was found to possess an interconnected hollow cage with three-dimensional mesh structure showing the largest surface area,pore volume and C-sp^(3) edge defect content among all the catalysts,which explained its paramount catalytic *** SSA and C-sp^(3) content together can determine the catalytic performance in a quantitative *** single electron transfer pathway from SDZ to inner-sphere bound SK-C/PDS*was the protagonist of pollutant *** degradation intermediates were detected and recognized and their toxicities were *** study for the first time comprehensively identified the synergistic effect between the SSA and inherent defects on improving the catalytic performance of biochar for PDS activation to removal contaminants.

关键词： Biochar C-sp^(3)edge defects Peroxydisulfate Electron transfer pathway Organic pollutants Degradation

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Effect of sediment resuspension on underwater light field in shallow lakes in the middle and lower reaches of the Yangtze River:A case study in Longgan Lake and Taihu Lake

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Science China Earth Sciences 2006年第Z1期49卷 114-125页

作者： ZHANG Yunlin, QIN boqiang, ZHU Guangwei, gao Guang, LUO Liancong & CHEN Weimin Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China Graduate School of Chinese Academy of Sciences, Beijing 100039, China Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing China Graduate School of Chinese Academy of Sciences Beijing China

Based on three continuous in situ underwater light field measurement under different wind waves conditions in Longgan Lake, Meiliang Bay of Taihu Lake in July 2003 and littoral zone near TLLER in July 2004, respectively, the effects of sediment resuspension caused by wind waves on PAR diffuse attenuation, absorption coefficients and euphotic depths are analyzed. In Longgan Lake, PAR diffuse attenuation coefficients during small, middle and large wind waves were 1.74, 2.02 and 2.45 m-1, respectively, and the corresponding PAR spectral diffuse attenuations ranged from 0.98 to 2.97, 1.34 to 3.95 and 1.80 to 5.40 m-1, respectively. In Meiliang Bay, PAR diffuse attenuation coefficients were 2.63, 3.72, 4.37 m-1 during small, middle and large wind waves. PAR diffuse attenuation coefficients increased by 41% and 66% from small to middle, large wind waves, respectively. Absorption coefficients integrated over the range of PAR of CDOM, phytoplankton were 0.26, 0.28 m-1; 0.76, 0.49 m-1, respectively during middle and large wind waves. Absorption coefficients integrated over the range of PAR of non-algal particulate matter and total suspended particulate matter increased from 0.94 to 1.73 m-1, and from 1.70 to 2.22 m-1, respectively during middle and large wind waves. Relative contributions of absorption coefficients of non-algal particulate matter to total absorption coefficient integrated over the range of PAR were 44.14%, 65.05%, respectively, during middle and large wind waves. PAR euphotic depths decreased by 0.40, 0.19, 0.20 m from middle to large wind waves in Longganhu Lake, Meliang Bay and littoral zone near TLLER. Significant correlations were found between transparency, PAR diffuse attenuation coefficients, euphotic depths and total suspended paniculate matter, wind velocity, wave height. Most significant correlations were found between transparency, PAR diffuse attenuation coefficients, euphotic depths and inorganic suspended paniculate matter but low correlations

关键词： shallow lake, Taihu Lake, diffuse attenuation coefficient, absorption coefficient, total suspended particulate matter.

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阳离子淀粉与硫化镉复合膜对染料的选择性光降解

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中国科学：化学 2020年第6期50卷 707-719页

作者：薛宇翔李娜高博强杨琥南京大学环境学院污染控制与资源化研究国家重点实验室南京210023

对复杂污染物进行有效分离,实现资源化再利用具有重要的现实意义.光催化具有氧化性强的特点,但降解不具有选择性,很难实现资源化.本文针对混合染料废水,选用对不同染料具有不同吸附能力的阳离子改性淀粉(St-CTA)作为光催化剂CdS的载体,... 详细信息

对复杂污染物进行有效分离,实现资源化再利用具有重要的现实意义.光催化具有氧化性强的特点,但降解不具有选择性,很难实现资源化.本文针对混合染料废水,选用对不同染料具有不同吸附能力的阳离子改性淀粉(St-CTA)作为光催化剂CdS的载体,采用原位生成法制成复合膜(CdS/St-CTA),详细考察了CdS/St-CTA在茜素绿(AG25)、甲基橙(MO)和罗丹明B(RhB)单组分与二元染料组分溶液中的吸附降解行为.CdS/St-CTA在AG25/RhB和MO/RhB混合溶液中分别对AG25和MO具有良好的选择性降解作用,而对Rh B没有去除效果.这是由于St-CTA载体对不同染料具有不同的吸附性能所造成的.CdS/St-CTA的选择降解性能不受Cl^-、SO4^2-和CO3^2-等共存阴离子及pH的影响.此外,使用后的CdS/St-CTA不需要脱附或其他再生处理,便可应用于下一次降解处理,循环5次后仍能保持原有的降解效率,证明CdS/St-CTA具有稳定的回收再利用性能.本文提出的载体负载光催化剂"选择吸附富集-选择光降解"这一策略,具有良好的普适性,对处理不同污染物均具有一定的参考价值.

关键词：改性淀粉/CdS复合膜混合染料选择性吸附选择性光催化降解选择性光催化降解机制

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单宁酸-钛复合吸附剂的制备及其对氟喹诺酮类抗生素的吸附去除

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环境化学 2022年第7期41卷 2180-2192页

作者：常慊慊高博强刘波龙超杨琥南京大学环境学院污染控制与资源化研究国家重点实验室南京210023 泉州南京大学环保产业技术研究院泉州362000

本文以一种绿色环保且来源广泛的天然高分子单宁酸(TA)为原材料,四氯化钛为改性剂,一步法制得一系列单宁酸-钛(TA-Ti)复合吸附剂.首先通过多种表征技术考察了吸附剂的分子结构及其表面微观形貌等;针对目前在地表水中已发现的氟喹诺酮类... 详细信息

本文以一种绿色环保且来源广泛的天然高分子单宁酸(TA)为原材料,四氯化钛为改性剂,一步法制得一系列单宁酸-钛(TA-Ti)复合吸附剂.首先通过多种表征技术考察了吸附剂的分子结构及其表面微观形貌等;针对目前在地表水中已发现的氟喹诺酮类抗生素(FQs),以氧氟沙星(OFL)为代表,系统研究了TA-Ti对OFL的吸附性能,详细考察了溶液pH、污染物浓度、吸附时间及不同共存物等对TA-Ti吸附性能的影响;并对具有与OFL相似结构的FQs及其两种亚结构类似物的吸附效果进行对比,结合吸附前后吸附剂傅里叶红外光谱和X射线光电子能谱谱图的变化,以及吸附动力学与等温吸附模型分析等,深入探讨了TA-Ti对OFL的吸附机制.TA可通过静电吸引、氢键、负电荷辅助氢键及π—π相互作用等与FQs作用;此外,钛离子不仅作为TA的交联剂,同时还可通过螯合作用协同吸附FQs,有效提高TA对FQs的吸附性能,对OFL理论最优吸附量为1.028 mmol·g^(−1).本文提供了一种绿色环保的高效吸附剂材料,可有效地净化FQs有机微污染水体,提高用水安全.

关键词：氟喹诺酮类抗生素氧氟沙星单宁酸钛离子吸附性能吸附机制

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FeCl_(3)与接枝型淀粉改性絮凝剂联用“化学沉淀-絮凝”工艺除磷去浊性能

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环境化学 2020年第11期39卷 2988-2998页

作者：任杰高博强唐宇农李爱民杨琥南京大学环境学院污染控制与资源化研究国家重点实验室南京210023

过量的磷元素进入水体是引起水体富营养化的主要原因.本论文在传统化学沉淀除磷法基础上,采用"化学沉淀-絮凝"工艺,将氯化铁与一种接枝型阳离子淀粉改性絮凝剂(淀粉接枝共聚丙烯酰胺-聚甲基丙烯酰氧乙基三甲基氯化铵,St-AD)联合使用,分... 详细信息

过量的磷元素进入水体是引起水体富营养化的主要原因.本论文在传统化学沉淀除磷法基础上,采用"化学沉淀-絮凝"工艺,将氯化铁与一种接枝型阳离子淀粉改性絮凝剂(淀粉接枝共聚丙烯酰胺-聚甲基丙烯酰氧乙基三甲基氯化铵,St-AD)联合使用,分别在无机磷和有机磷模拟含浊废水中考察了其同时除磷及去浊性能.系统研究了天然高分子絮凝剂结构因素(电荷密度等)和环境因素(FeCl3与高分子絮凝剂投加量、pH、初始浊度以及初始总磷含量等)对上述基于FeCl3和淀粉改性絮凝剂联用的"化学沉淀-絮凝"工艺除磷去浊性能的影响.研究发现,相比于单独使用FeCl3化学沉淀除磷法,St-AD的加入使得铁盐投加量显著减少,同时形成的絮体尺寸更大,絮体结构也更为密实,进一步提高了除磷效果,同时也有效降低水体浊度;且一般情况下,St-AD阳离子取代度增高,处理效果增强;最佳工艺条件下,总磷和浊度去除率分别可达到98%和99%以上.此外,该组合工艺对有机磷模拟废水净化效果的提升优于对无机磷模拟废水.不同初始pH条件下实验结果表明,pH较高(pH>5)时该组合工艺的除磷去浊效果较好;本实验范围内初始浊度(30—300 NTU)对该组合工艺的除磷去浊效果影响较小;该"化学沉淀-絮凝"组合工艺对较高初始总磷含量(>20 mg·L^(-1))的模拟废水作用效果较差,该组合工艺不适于处理具有较高初始总磷含量的废水.由于该"化学沉淀-絮凝"组合工艺在除磷去浊中具有良好的性价比及环保特征,因此该工艺在水处理行业中应具有良好的应用前景.

关键词：除磷去浊 “化学沉淀-絮凝”工艺接枝型淀粉改性絮凝剂氯化铁除磷去浊机理

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Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen Ma Jin-Hua gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

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二氧化硅纳米粒子尺寸对其复合增强聚丙烯酰胺水凝胶性能影响研究

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当代化工研究 2019年第13期 9-11页

作者：吕东高博强杨琥郭学锋南京大学环境学院污染控制与资源化研究国家重点实验室江苏210023 南京大学化学化工学院江苏210023

本论文制备了一系列聚丙烯酰胺(PAM)复合不同粒径的单分散二氧化硅纳米粒子(MSNP)的水凝胶材料(MSNP-PAM)。详细研究了MSNP纳米粒子尺寸对MSNP-PAM力学性能的影响。结果表明通过与MSNP的有效结合纳米复合水凝胶的抗压强度得到增强,但纳... 详细信息

本论文制备了一系列聚丙烯酰胺(PAM)复合不同粒径的单分散二氧化硅纳米粒子(MSNP)的水凝胶材料(MSNP-PAM)。详细研究了MSNP纳米粒子尺寸对MSNP-PAM力学性能的影响。结果表明通过与MSNP的有效结合纳米复合水凝胶的抗压强度得到增强,但纳米复合水凝胶的抗压强度与复合的MSNP尺寸之间呈反比关系。这可能是较小尺寸纳米颗粒具有较大的比表面积和较高的活性从而较小尺寸的MSNP具有较高的抗压强度增强效果。

关键词：纳米复合水凝胶二氧化硅纳米粒子纳米粒子尺寸效应机械性能

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多酸基UiO-66的合成及其对硫化氢的脱除性能

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环境科学与技术 2024年第6期47卷 86-93页

作者：李祥华左强李品张艺柯马双龙王竞侦高博强黄岩河南省生态环境技术中心河南郑州450004 河南农业大学资源与环境学院河南郑州450046 河南省生态环境损害鉴定评估与土壤污染修复治理工程技术研究中心河南郑州450004

硫化氢具有较强的毒性和腐蚀性,高效脱除硫化氢对于工业生产、环境治理等过程意义重大。该文基于钼基杂多酸(HPAs),以UiO-66为载体,一步水热合成HPAs@UiO-66,构建不同活性中心多酸基固相脱硫体系,考察杂多酸结构(Keggin、Dawson)、中心... 详细信息

硫化氢具有较强的毒性和腐蚀性,高效脱除硫化氢对于工业生产、环境治理等过程意义重大。该文基于钼基杂多酸(HPAs),以UiO-66为载体,一步水热合成HPAs@UiO-66,构建不同活性中心多酸基固相脱硫体系,考察杂多酸结构(Keggin、Dawson)、中心原子(P、Si)、取代原子(V、W)对脱硫的影响,并通过BET、FT-IR、XRD、SEM、TEM进行理化性质分析。结果表明,PMo_(12)@UiO-66脱硫活性最高,且其脱硫能力在100℃时最佳,吸附量可达到17.18 mg/g,同时发现水分对其脱硫具有促进作用。与PMo_(12)和UiO-66相比,PMo_(12)@UiO-66表现出明显脱硫优势,其吸附量分别为PMo_(12)和UiO-66的7.5和14.2倍,证明了PMo_(12)与UiO-66具有协同脱硫作用。XPS结果表明,PMo_(12)与H_(2)S之间发生了氧化还原反应,H_(2)S在PMo_(12)氧化作用下被转化成单质硫。研究表明PMo_(12)的引入对UiO-66脱硫性能的强化作用最为显著,可为开发新型多酸基固相脱硫剂提供参考。

关键词：杂多酸硫化氢非均相脱硫金属有机框架资源化转化

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