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Frontiers of Environmental Science & Engineering 2024年第9期18卷 51-66页

作者： xiaolong yao Kuan Wan Wenxin Yu Zheng Liu School of Ecology and Environment Beijing Technology and Business UniversityBeijing 100048China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China

Volatile organic compounds(VOC)have been proven to cause considerable harm to both the ecological environment and human *** VOC emissions are primarily generated by the industrial *** utilization of porous carbon as an adsorbent has emerged as an effective method for the efficient removal of VOC from industrial ***,during the actual production processes,VOC exhaust gases are often mixed with water vapor,which poses challenges for adsorption *** review provides a comprehensive overview of the remarkable advancements in various carbon materials in terms of their ability to adsorb both VOC and water ***,it systematically summarizes the influence of surface groups on adsorbents and the molecular properties of VOC on their adsorption by carbon ***,this review introduces the mechanism underlying adsorption-adsorbent interactions and discusses the construction of models for adsorbing water vapor and *** challenges associated with the application of carbon materials for VOC adsorption in humid environments are also *** review aims to offer theoretical and technical guidance for the effective purification of moist VOC waste gases emitted from industrial sources,thereby achieving precise control of VOC emissions.

关键词： Adsorption Water vapor Carbon-based adsorbents Surface functional groups VOC properties

A bibliometric review of nitrogen research in eutrophic lakes and reservoirs

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Journal of Environmental Sciences 2018年第4期30卷 274-285页

作者： xiaolong yao Yunlin Zhang Lu Zhang Yongqiang Zhou Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China University of Chinese Academy of Sciences Beijing 100049 China

The global application of nitrogen is far greater than phosphorus, and it is widely involved in the eutrophication of lakes and reservoirs. We used a bibliometric method to quantitatively and qualitatively evaluate nitrogen research in eutrophic lakes and reservoirs to reveal research developments, current research hotspots, and emerging trends in this area. A total of 2695 articles in the past 25 years from the online database of the Scientific Citation Index Expended（SCI-Expanded） were analyzed. Articles in this area increased exponentially from 1991 to *** the USA was the most productive country over the past 25 years, China achieved the top position in terms of yearly publications after 2010. The most active keywords related to nitrogen in the past 25 years included phosphorus, nutrients, sediment, chlorophyll-a, carbon,phytoplankton, cyanobacteria, water quality, modeling, and stable isotopes, based on analysis within 5-year intervals from 1991 to 2015 as well as the entire past 25 years. In addition, researchers have drawn increasing attention to denitrification, climate change, and internal loading. Future trends in this area should focus on：（1） nutrient amounts, ratios, and major nitrogen sources leading to eutrophication;（2） nitrogen transformation and the bioavailability of different nitrogen forms;（3）nitrogen budget, mass balance model, control, and management;（4） ecosystem responses to nitrogen enrichment and reduction, as well as the relationships between these responses; and（5）interactions between nitrogen and other stressors（e.g., light intensity, carbon, phosphorus, toxic contaminants, climate change, and hydrological variations） in terms of eutrophication.

关键词： Nitrogen Eutrophication Research hotspots Trends Bibliometric

Dissolved nitrous oxide and emission relating to denitrification across the Poyang Lake aquatic continuum

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Journal of Environmental Sciences 2017年第2期29卷 130-140页

作者： Huaxin Wang Lu Zhang xiaolong yao Bin Xue Weijin Yan Institute of Geographical Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Graduate University of the Chinese Academy of Sciences Beijing 200049China

Most aquatic ecosystems contribute elevated N2 O to atmosphere due to increasing anthropogenic nitrogen loading. To further understand the spatial heterogeneity along an aquatic continuum from the upriver to wetland to lake to downriver, the study was conducted on spatial variations in N2 O emission along Poyang Lake aquatic continuum during the flood season from 15 July 2013 to 10 August 2013. The results showed the N2 O concentrations, the ratio of N2O/dinitrogen（N2） gases production, N2 O emission and denitrification rates ranged from 0.10 to 1.11 μg N/L,- 0.007% to 0.051%,- 9.73 to 127 μg N/m2/hr and 1.33 × 104to31.9 × 104μg N2/m2/hr, respectively, across the continuum. The average N2 O concentrations,the ratio of N2O/N2 and N2O emission was significantly lower in wetlands as compared to the rivers and lake（p 〈 0.01）. The significantly high denitrification rate and low N2 O emission together highlighted that most N2 O can be converted into N2 via near complete denitrification in the Poyang Lake wetlands. Our study suggests that the wetlands might impact N2 O budget in an integrated aquatic ecosystems. Moreover, N2 O emission from different aquatic ecosystem should be considered separately when quantifying the regional budget in aquatic ecosystem.

关键词： Nitrous oxide gas Nitrogen Dinitrogen gas Denitrification Natural wetlands Poyang Lake

Advances in the electrochemical degradation of environmental persistent organochlorine pollutants: materials, mechanisms, and applications

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FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 2024年第11期18卷 144页

作者： Pei, Xinlong Shang, Ruichao Chen, Baitao Wang, Zehui yao, xiaolong Zhu, Hong Beijing Univ Agr Coll Biosci & Resource Environm Beijing 102206 Peoples R China Beijing Technol & Business Univ Dept Environm Sci & Engn Beijing 100048 Peoples R China

Pollution from persistent organic chlorinated pollutants (POCPs) in water environments is attributable to historical reasons and the lack of effective discharge regulations. Electrochemical degradation of POCPs, as a key study for POCP degradation, involves the use of electrons as reducing or oxidizing agents. The occurrence of this degradation depends on the environmental characteristics of the POCPs, the electrochemical materials used, and the technology and mechanisms involved. Furthermore, regarding the development of new materials and technologies, such as micro-, nano-, and atomic-sized materials, the degradation of POCPs achieves higher degradation efficiency and maximizes current utilization efficiency. In this review article, we first summarize the current status and future opportunities of the electrochemical degradation of POCPs. Environmental characteristics of POCPs facilitate a comparison of POCP degradation, and a comparison of electrochemical materials and their methods is made. Subsequently, we discuss technologies for the electrochemical degradation of POCPs from three aspects: oxidation, reduction, and a combination of oxidation and reduction. Moreover, the mechanisms were generalized in terms of molecular structure, electrode materials, and solution environment. In addition to maximizing the intrinsic enhancement factors of degradation, strategies to improve environmental accessibilities are equally important. This review article aims to effectively guide the advancement of POCP degradation and the remediation of environmental water pollution.

关键词： Persistent organochlorine pollutants Electrochemical degradation Hydrogenolysis reduction dichlorination Catalytic oxidation

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基于图嵌入的多重异质网络节点重要度评估

北京邮电大学学报 2022年第4期45卷 104-109页

作者：舒坚尧小龙李睿瑞南昌航空大学软件学院南昌330063

为提高多重异质网络中节点重要度评估的准确性,提出一种基于图嵌入的节点重要度评估方法。通过随机游走采样邻居节点,聚合节点在同种连边类型和不同连边类型下的节点特征,利用多层感知机将特征映射到嵌入空间,得到嵌入向量;根据节点的... 详细信息

为提高多重异质网络中节点重要度评估的准确性,提出一种基于图嵌入的节点重要度评估方法。通过随机游走采样邻居节点,聚合节点在同种连边类型和不同连边类型下的节点特征,利用多层感知机将特征映射到嵌入空间,得到嵌入向量;根据节点的嵌入向量和局部结构特征构建重要度评估指标。在CElegans和CS-Aarhus等数据集上的实验结果表明,与多重介数中心性、有偏页面排序和多重证据中心性等方法相比,所提方法具有更高的准确性。

关键词：多重异质网络节点重要度评估图嵌入

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热氧改性对活性炭物性影响的量化分析

中南大学学报（自然科学版） 2016年第6期47卷 2110-2118页

作者：马先成李立清姚小龙中南大学能源科学与工程学院湖南长沙410083

通过硝酸进行预处理,在不同氧气体积分数、温度、时间时对活性炭进行热氧改性,采用比表面积和孔径分析仪、SEM-EDX法对活性炭物性进行测试。采用BBD回应曲面法进行多元回归分析,建立改性条件与活性炭比表面积、微孔孔容、表面含氧量等... 详细信息

通过硝酸进行预处理,在不同氧气体积分数、温度、时间时对活性炭进行热氧改性,采用比表面积和孔径分析仪、SEM-EDX法对活性炭物性进行测试。采用BBD回应曲面法进行多元回归分析,建立改性条件与活性炭比表面积、微孔孔容、表面含氧量等参数关系的数学模型,探讨不同改性条件对活性炭物性的影响规律,对改性参数进行优化分析。研究结果表明:改性时间是活性炭比表面积和微孔孔容的最大影响因素,氧气体积分数是表面含氧量的最大影响因素。在制备良好的功能活性炭材料时,可以通过以下2种方式来实现:一是在氧气体积分数极低的环境中,适当提高改性温度与增加改性时间;二是增加改性气氛中的氧气体积分数,降低改性温度,同时缩短改性时间。

关键词：响应曲面法比表面积微孔孔容表面含氧量

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活性炭变压吸附二氧化硫的传热传质规律

中南大学学报（自然科学版） 2015年第5期46卷 1959-1966页

作者：刘峥李立清黄贵杰姚小龙中南大学能源科学与工程学院湖南长沙410083 广西大学环境学院广西南宁530004 广州地铁设计研究院有限公司环境工程所广东广州510010 清华大学环境学院北京100084

采用两床五步式变压吸附工艺,研究活性炭固定床变压吸附处理SO2过程中的传热传质规律和脱附状态下脱附气的浓缩率的变化规律。研究结果表明：不同吸附高度的温度曲线随变压吸附循环的周期数改变而变化。在实验条件下,传质区主要集中在高... 详细信息

采用两床五步式变压吸附工艺,研究活性炭固定床变压吸附处理SO2过程中的传热传质规律和脱附状态下脱附气的浓缩率的变化规律。研究结果表明：不同吸附高度的温度曲线随变压吸附循环的周期数改变而变化。在实验条件下,传质区主要集中在高度H=0.08~0.15 m处;随着吸附柱高度的增加,气相组分物质质量浓度逐渐降低,并且在400个周期以后开始达到稳定。在床层高度0.60 m以上没有SO2气体存在。SO2在吹扫脱附阶段和真空脱附阶段的不同脱附时刻的脱附气浓缩率均随变压吸附过程先快速升高,然后趋于稳定,当达到稳定时,SO2的脱附气浓缩率随脱附时间的增加而降低。在实验条件下,变压吸附各阶段的最佳时长如下：均压段为3 s,吸附段为170 s,吹扫脱附设为15 s,真空脱附为180 s;脱附气的SO2平均浓缩率为2。

关键词：变压吸附温度气相质量浓度脱附气浓缩率

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鄱阳湖水体氧化亚氮排放特征及影响因素

湖泊科学 2016年第5期28卷 972-981页

作者：徐会显姜星宇姚晓龙张路中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室南京210008 中国科学院大学北京100049

于2014年4、7和10月以及2015年1月(分别代表春、夏、秋和冬季)对鄱阳湖13个常规监测点表层水体中氧化亚氮(N_2O)浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N_2O平均浓度为32.57±17.35 nmol/L,总体处于过饱和状态... 详细信息

于2014年4、7和10月以及2015年1月(分别代表春、夏、秋和冬季)对鄱阳湖13个常规监测点表层水体中氧化亚氮(N_2O)浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N_2O平均浓度为32.57±17.35 nmol/L,总体处于过饱和状态,平均饱和度为256.83%±129.05%.鄱阳湖N_2O年平均交换通量为0.83±0.69μmol/(m2·h).鄱阳湖水体N_2O季节性释放规律为春季最高,平均交换通量为1.71μmol/(m2·h),其次是夏季和冬季,秋季最低.从空间上来看,春季北部湖区交换通量显著高于南部湖区.相关性分析表明,铵态氮浓度是影响夏季和冬季鄱阳湖水体N_2O产生的主要因素.结合水域面积初步估算出全年释放N_2O约1.29×107mol,其中春季和夏季是鄱阳湖水体N_2O释放的高峰期,总释放量约占全年的80.40%.全年通过N_2O输出氮素约为361.93 t,对鄱阳湖流域内N_2O分布及质量平衡具有一定影响.

关键词：鄱阳湖排放氧化亚氮季节变化

长江中下游典型湿地沉积物-水界面硝酸盐异养还原过程

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湖泊科学 2016年第6期28卷 1283-1292页

作者：姜星宇姚晓龙徐会显张路中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室，南京 210008 中国科学院大学，北京 100049

反硝化(Denitrification,DNF)和硝酸盐异化还原为氨(Dissimilatory Nitrate Reduction to Ammonium,DNRA)是硝酸盐异养还原的2个主要途径.反硝化被认为是彻底去除水体氮负荷的主要过程;而硝酸盐异化还原为氨则将水体中的硝态氮转化为氨... 详细信息

反硝化(Denitrification,DNF)和硝酸盐异化还原为氨(Dissimilatory Nitrate Reduction to Ammonium,DNRA)是硝酸盐异养还原的2个主要途径.反硝化被认为是彻底去除水体氮负荷的主要过程;而硝酸盐异化还原为氨则将水体中的硝态氮转化为氨氮.2个过程均以硝酸盐为电子受体,并存在相互竞争关系.这2个过程的研究对理解湿地氮转化以及指导湿地氮污染修复具有重要意义.运用无扰动沉积物柱样流动培养、15NO-3-N同位素示踪实验,并采用氨氧化-膜接口质谱仪联用(OX/MIMS)测定氨氮同位素产物的方法,对鄱阳湖碟形湖湿地、巢湖重污染河流湿地、巢湖重污染湖泊湿地3种类型湿地沉积物-水界面的硝酸盐异养还原过程进行研究,结果表明存在显著差异.3种类型湿地DNF速率的范围为(6.36±2.57)^(99.98±14.05)μmol/(m2·h),DNRA速率的范围为(0.51±0.45)^(79.82±6.08)μmol/(m2·h).在3种类型湿地中,随着氮污染程度加重,DNF和DNRA速率均显著增加,且DNRA过程在总的硝态氮异养还原中所占的比重不断增大,说明较高的硝酸盐负荷、较高的沉积物有机质含量更有利于DNRA过程的竞争.而对反硝化方式的进一步研究发现,巢湖重污染河流、湖泊湿地主要以非耦合反硝化为主导过程,而鄱阳湖碟形湖湿地则更倾向于以硝化过程耦合控制的反硝化为主.

关键词： DNRA 反硝化硝酸盐异养还原沉积物-水界面长江中下游巢湖鄱阳湖碟形湖湿地重污染河流湿地重污染湖泊湿地

MnO_(x)-CeO_(2)催化剂的氯苯氧化性能及反应机理

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高等学校化学学报 2023年第4期44卷 109-120页

作者：高凤雨陈都罗宁姚小龙段二红易红宏赵顺征唐晓龙北京科技大学能源与环境工程学院工业典型污染物资源化处理北京市重点实验室北京100083 北京工商大学中国轻工业清洁生产和资源综合利用重点实验室北京100048 河北科技大学环境科学与工程学院石家庄050018

研究了Mn/Ce摩尔比、反应温度、氧气和水对MnO_(x)-CeO_(2)催化剂催化氯苯氧化性能(活性、选择性和稳定性)的影响,并分析了其理化性能、作用过程和反应机理.结果表明,在含H_(2)Ogas和O_(2)(体积分数均为5%)条件下,Mn_(2)Ce_(1)O_(x)在10... 详细信息

研究了Mn/Ce摩尔比、反应温度、氧气和水对MnO_(x)-CeO_(2)催化剂催化氯苯氧化性能(活性、选择性和稳定性)的影响,并分析了其理化性能、作用过程和反应机理.结果表明,在含H_(2)Ogas和O_(2)(体积分数均为5%)条件下,Mn_(2)Ce_(1)O_(x)在100,200和300℃下分别取得了80.6%,86.8%和97.5%的氯苯转化率;反应温度和氧气含量的增加及水的存在均有利于提高催化活性和反应稳定性;MnO_(x)和CeO_(2)复合提高了比表面积(128.61 m^(2)/g)、降低了孔径(6.17 nm)且增强了表面酸性(中酸和强酸位点)和氧化还原能力,价态电子交互循环过程(Ce^(4+)/Ce^(3+)←→—Mn^(4+)/Mn^(3+)/Mn_(2)+)和氧循环作用(吸附氧←→—晶格氧)是催化反应的关键驱动过程.氯苯分子吸附在Mn_(2)Ce_(1)O_(x)催化剂表面发生脱氯反应形成苯酚,进一步开环氧化为关键的乙酸盐中间物种,最终转化为CO_(2),HCl或Cl_(2),H_(2)O.水和氧气可以活化为羟基和[O*]等活性氧物种,促进了氯苯的吸附活化和中间产物的深度氧化,降低了中间副产物(氯代乙氧基、苯酚和醛类等)的形成与表面Cl物种的沉积,进而提升了催化活性和反应稳定性.

关键词： MnO_(x)-CeO_(2) 氯苯氧化催化活性稳定性反应机理