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Characteristics and influencing factors of greenhouse gas emissions from reservoirs in the Yellow River Basin:A Meta-analysis

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Science China Earth Sciences 2024年第7期67卷 2210-2225页

作者： Shurui HUANG Peijia ZHANG Wenxiu ZHENG Jiajia ZHANG Yang LI Yuanjian WANG Enhui JIANG Shaoda LIU xinghui xia State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 00875China Yellow River Institute of Hydraulic Research Yellow River Conservancy CommissionZhengzhou 450003China

Reservoir construction and operation profoundly alter the hydrological,hydrodynamic,and carbon and nitrogen cycling processes of ***,current research still lacks a systematic understanding of the characteristics of greenhouse gas(GHG)emissions from reservoirs in arid/semi-arid *** study integrates existing monitoring data to discuss the characteristics of GHG emissions from reservoirs in the Yellow River Basin and illustrate the controlling factors and underlying mechanism of these *** results indicate that while CO_(2) emission flux from reservoirs is lower than that from river channels,the emission fluxes of CH_(4) and N_(2)O are 1.9 times and 10 times those from rivers,respectively,indicating that the emission of GHG with stronger radiative effect is significantly enhanced in *** to the reservoirs in humid climates(e.g.,the Three Gorges Reservoir),reservoirs in the Yellow River Basin exhibit relatively lower emissions of CO_(2) and CH_4 due to lower organic matter concentrations,but significantly higher N_(2)O emissions due to higher nitrogen *** Carlo simulations for 237 reservoirs in the Yellow River Basin showed that total emission of the three GHGs is 3.05 Tg CO_(2)-eq yr^(-1),accounting for 0.39% of the total emission from global reservoirs and lower than the area percentage of the basin(0.53%).This study has important implications on revealing the GHG emission characteristics and control mechanisms of reservoirs in arid/semi-arid regions.

关键词： Yellow River Basin Reservoir Greenhouse gas Emission flux Water quality

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Future climate change decreases multi-pathway but increases respiratory human health risks of PAHs across China

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National Science Open 2024年第2期3卷 128-147页

作者： Jiaao Bao xinghui xia Ying Zhu Bingxiang Zhao Erxue Gu Yanan Liu xiao Yun Zhenrui Zhang Nannan Xi Yong Geng Ying Xu Zhifeng Yang Derek C.G.Muir Key Laboratory of Water and Sediment Sciences of Ministry of Education State Key Laboratory of Water Environment SimulationSchool of EnvironmentBeijing Normal UniversityBeijing 100875China State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants School of Environmental Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China College of Urban and Environmental Sciences Laboratory for Earth Surface ProcessesSino-French Institute for Earth System SciencePeking UniversityBeijing 100871China National Climate Center China Meteorological AdministrationBeijing 100081China Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Aquatic Contaminants Research Division Environment and Climate Change CanadaBurlington L7S 1A1Canada

Future climate change will affect the environmental fate of hydrophobic organic contaminants(HOCs)and associated human health risks,yet the extent of these effects remains ***,we couple a high-resolution environmental multimedia model with a bioaccumulation model to study the multimedia distribution of 16 priority polycyclic aromatic hydrocarbons(PAHs),a group of HOCs,and assess future PAH-related human health risks under varying climate change scenarios over China at a continental *** removing the effects of PAH emission changes,we find that the total PAH concentrations would decrease in the air,freshwater,sediment,soil,and organisms,while the high-molecular-weight PAH would increase in the air with climate warming from 1.5°C to 4°***,the multi-pathway exposure human health risks predominately influenced by dietary ingestion are expected to decrease by 1.7%–20.5%,while the respiratory risks are projected to rise by 0.2%–5.8%in the ***,the persistently high multi-pathway human health risks underscore the need for reducing future PAH emissions by 69%compared with 2009 levels in *** study demonstrates the urgency of limiting PAH emissions under future climate change for public health and highlights the importance of including the contribution of dietary ingestion in human health risk assessment.

关键词： polycyclic aromatic hydrocarbons future climate change human health risks emission reduction

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Soil Organic Carbon Changes in City Areas of China Over the Past Three Decades:Implications for Achieving Carbon Neutrality

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Engineering 2023年第9期28卷 11-15页

作者： Zhenrui Zhang xinghui xia Zhifeng Yang Key Laboratory of Water and Sediment Sciences of Ministry of Education&State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China

The substantial amount of greenhouse gas emissions from anthropogenic activities has caused the global mean surface temperature to increase by 0.99℃since the industrial revolution[1].China is committed to achieving carbon neutrality by 2060 in response to climate change[2].Soil stores approximately 2344–3000 Pg(1015 g)of carbon at depths of 0–100 cm in terrestrial ecosystems,an amount approximately equivalent to twice the amount in the atmospheric carbon pool and three times that in the terrestrial biomass;therefore,even a small change in soil carbon stocks will exert significant impacts on atmospheric CO_(2)concentrations[3].

关键词： stores terrestrial Carbon

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基于物种敏感度分布及相平衡理论的汾河流域磺胺类抗生素生态风险阈值研究

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生态毒理学报 2024年第1期19卷 115-126页

作者：刘瑞民赵静韩文辉王林芳马双绕夏星辉北京师范大学环境学院水环境模拟国家重点实验室北京100875 山西省环境监测与应急保障中心(山西省生态环境科学研究院) 太原030027 山西农业大学高粱研究所高粱遗传与种质创新山西省重点实验室晋中030600

磺胺素类抗生素(SAs)广泛应用于医疗、畜禽养殖等领域。但过量的SAs通过多种方式最终进入流域水体和沉积物中,对流域生态系统带来潜在的风险。预测无效应浓度(PNEC)可以作为评估污染物潜在生态风险的阈值,因此确定水体和沉积物中SAs的P... 详细信息

磺胺素类抗生素(SAs)广泛应用于医疗、畜禽养殖等领域。但过量的SAs通过多种方式最终进入流域水体和沉积物中,对流域生态系统带来潜在的风险。预测无效应浓度(PNEC)可以作为评估污染物潜在生态风险的阈值,因此确定水体和沉积物中SAs的PNEC是风险评估的关键。本研究以黄河支流——汾河流域为研究区,通过采集水体和沉积物的样品,发现水体中SAs的磺胺甲恶唑(SMX)含量最高,均值为73.6 ng·L^(-1),而磺胺醋酰(SAAM)检出率最高,高达100%。沉积物中仅检出了2种SAs类抗生素,为磺胺醋酰(SAAM)和磺胺喹恶啉(SQX),但检出频率却高达100%。基于物种敏感度分布(SSD)得到水体中SAs的生态风险阈值为3.40~440μg·L^(-1)。在此基础上,基于水-沉积物密度、体积比等参数,采用相平衡理论(EqP)进一步得到了沉积物中SAs的生态风险阈值为0.065~75.5 mg·kg^(-1)。基于确定的生态风险阈值,对汾河流域SAs现状进行风险评估,结果表明仅水体中的甲氧苄啶(TMP)的风险商(RQ)均值为0.014,存在一定的低风险,但超标概率仅为8%,而其他类别在水体和沉积物中RQ均低于0.01,均无显著风险。

关键词：磺胺类抗生素(SAs) 预测无效应浓度(PNEC) 物种敏感度分布(SSD) 相平衡理论(EqP) 生态风险阈值

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Growth and nutrient accumulation of Phragmites australis in relation to water level variation and nutrient loadings in a shallow lake

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Journal of Environmental Sciences 2013年第1期25卷 16-25页

作者： Ying Zhao xinghui xia Zhifeng Yang State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal University

Shallow lake eutrophication is a global environmental issue. This study investigated the effects of water level variation and nutrient loadings on the growth and nutrient accumulation of Phragmites australis （reed） by field samplings in Baiyangdian Lake, the largest shallow lake of northern China. The field samplings were conducted in two sites of different nutrient loadings during the whole growth period of reeds, and three types of zones with different water depths were chosen for each site, including the terrestrial zone with water level below the ground, the ecotone zone with the water level varying from belowground to aboveground, and the submerged zone with water level above the ground. The result showed that reed growth was more limited by water level variation than nutrient loadings. The average stem lengths and diameters in terrestrial zones were about 26.3%-27.5% and 7.2%-12.0% higher than those in submerged zones, respectively. Similarly, the terrestrial status increased the aboveground biomass of reeds by 36.6%-51.8% compared with the submerged status. Both the nutrient concentrations and storages in the aboveground reeds were mainly influenced by the nutrient loadings in surface water and sediment rather than the water level variation of the reed growth environment, and the nutrient storages reached their maxima in late August or early September. It was observed that the maximum nitrogen storage occurred in the terrestrial zone with higher nutrient loadings, with the value of 74.5 g/m2. This study suggested that water level variation and nutrient loadings should be considered when using reeds to control and remediate eutrophication of shallow lakes.

关键词： water level variation nutrient loadings Phragmites australis reed growth nutrient accumulation

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Relationship between metabolic enzyme activities and bioaccumulation kinetics of PAHs in zebrafish(Danio rerio)

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Journal of Environmental Sciences 2018年第3期30卷 43-52页

作者： Haotian Wang Yayuan Li xinghui xia Xinyue Xiong State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University

Many studies have investigated bioaccumulation and metabolism of polycyclic aromatic hydrocarbons（PAHs）in aquatic ***,lack of studies investigated both processes simultaneously,and the interaction between these two processes is less understood so *** study investigated the bioaccumulation kinetics of PAHs and metabolic enzyme activities,including total cytochrome P450（CYPs）and total superoxide dismutase（T-SOD）,in *** zebrafish were exposed to the mixture of phenanthrene and anthracene under constant concentration maintained by passive dosing systems for 16 *** results showed that PAH concentrations in zebrafish experienced a peak value after exposure for 1.5 days,and then decreased *** bioaccumulation equilibrium was achieved after exposure for 12 *** of the uptake rate constants（ku）and the elimination rate constants（ke）decreased after the peak *** variation of PAH concentrations and metabolic enzyme activities in zebrafish had an interactive *** activities of CYPs and T-SOD increased initially with the increase of PAH concentrations,but decreased to the lowest state when PAH concentrations reached the peak *** the bioaccumulation equilibrium of PAHs was achieved,CYPs and T-SOD activities also reached the steady *** general,CYPs and T-SOD activities were activated after exposure to *** decrease of PAH concentrations in zebrafish after the peak value may be attributed to the great drop of kuand the variation of CYPs *** study suggests that an interactive relationship exists between bioaccumulation kinetics of PAHs and metabolic enzyme activities in aquatic organisms.

关键词： Hydrophobic organic compounds(HOCs)lBioaccumulationlMetabolismlCytochrome P450lTotal superoxide dismutase (T-SOD)lZebrafish

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Spatial and vertical variations of perfluoroalkyl substances in sediments of the Haihe River,China

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Journal of Environmental Sciences 2014年第8期26卷 1557-1566页

作者： Xiuli Zhao xinghui xia Shangwei Zhang Qiong Wu Xuejun Wang School of Environment Beijing Normal University/State Key Laboratory of Water Environment Simulation College of Urban and Environmental Sciences Peking University

The levels of six perfluoroalkyl substances（PFASs） in surface sediment and their vertical variations in dated sediment cores from the Haihe River were investigated; studied substances included perfluorooctanoic acid（PFOA）,perfluorononanoic acid（PFNA）,perfluorooctane sulfonate（PFOS）,perfluorodecanoic acid（PFDA）,perfluoroundecanoic acid（PFUnA）,and perfluorododecanoic acid（PFDoA）. Results showed that the total PFAS concentration in surface sediment ranged between 0.52 and 16.33 ng/g dry weight（dw） with an average of3.47 ng/g dw,with PFOS and PFOA as the dominant PFASs. In general,the PFAS concentrations in the mainstream increased from the upper to the lower reaches,except that a drop occurred downstream of the Erdao dam. Although the PFASs in the sediment cores did not show a clear decreasing or increasing trend with depth,the three cores had a similar vertical *** PFAS levels were relatively low in the surface sediment,and reached the first high point at8–20 cm as a result of the wide use of PFASs from 1990 to 2000. After that the PFAS levels decreased,and then increased to a second high point at about 40–48 cm,which might be caused by the leaching of PFASs in sediment. Because PFASs have hydrophilic groups and relatively high solubility,the PFASs will transfer from the upper to lower layers of sediment when water infiltration occurs,leading to the fluctuation of PFAS levels in sediment cores. This study suggests that both the temporal variation of sources and transfer processes of PFASs in sediments are important factors influencing the vertical variation of PFASs in sediment cores.

关键词： Perfluoroalkyl substances(PFASs) Sediment core Sediment quality Haihe River

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Adsorption and partition of benzo(a)pyrene on sediments with different particle sizes from the Yellow River

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Frontiers of Environmental Science & Engineering 2007年第2期1卷 172-178页

作者： xia xinghui MENG Lihong HU Lijuan State Key Laboratory of Water Environmental Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Institute of Tianjin Meteorological Bureau Tianjin 300074China

Experiments have been carried out to study the sorption of Benzo(a)pyrene(Bap)on sediment particles from the Yellow River using a batch equilibration *** of particle size on the adsorption and partition of Bap were investigated with the particle content of 3 g/*** significant results were obtained from the study.(1)Isotherms of Bap could be fitted with the dual adsorption-partition model under different particle sizes,and the measured value of the adsorption and partition was in agreement with the theoretical value of the dual adsorption-partition model.(2)When the particle diameter was d i 0.025 mm,the adsorp-tion was predominant in the sorption of Bap,which accounted for 68.7%-82.4%of the *** the particles with the size of 0.007 mm≤d“0.007 mm ≤d“d<0.007 mm”.(4)The partition coeffi-cients of Bap in solids with different particle sizes were linearly correlated with the organic content,and the Koc of Bap was about 1.26 × 10^(5)(L/kg).

关键词： polycyclic aromatic hydrocarbons(PAHs) benzo(a)pyrene adsorption partition sediment the Yellow River

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河流水沙条件对水质评价的影响

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中国科学：技术科学 2023年第11期53卷 1807-1814页

作者：夏星辉张祎迪北京师范大学环境学院水沙科学教育部重点实验室北京100875

世界上许多河流具有高泥沙含量特征,我国河流的高泥沙含量特征尤为显著.河流水沙条件包括悬浮泥沙的含量、粒径和组成以及溶解性有机质的含量和组成等参数.河流中的许多污染物倾向于与泥沙和有机质结合,泥沙和有机质的存在不仅影响了污... 详细信息

世界上许多河流具有高泥沙含量特征,我国河流的高泥沙含量特征尤为显著.河流水沙条件包括悬浮泥沙的含量、粒径和组成以及溶解性有机质的含量和组成等参数.河流中的许多污染物倾向于与泥沙和有机质结合,泥沙和有机质的存在不仅影响了污染物的迁移转化过程,同时还影响了污染物的生态环境风险.本文归纳总结了河流水沙条件特征及其对耗氧性有机污染物和有毒有机污染物迁移转化的影响,详细阐述了河流水沙条件对耗氧性有机物和有毒有机物污染评价的影响,指出由于化学氧化剂能氧化泥沙中在自然条件下耗氧过程极为缓慢的天然有机质,现有的化学需氧量可能高估水体耗氧性有机物的污染;又由于与泥沙结合的有毒有机污染物部分具有生物有效性,现有的基于有毒有机污染物溶解态浓度的水质评价方法可能低估水体有毒有机物的污染.并提出怎样考虑水沙条件影响对现有水质评价方法进行改进的思路,为完善水质评价方法提供参考,对于“碳中和”目标的实现也具有重要的意义.

关键词：水沙条件耗氧性有机污染物有毒有机污染物水质评价碳中和

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Variations in concentrations and bioavailability of heavy metals in rivers caused by water conservancy projects： Insights from water regulation of the xiaolangdi Reservoir in the Yellow River

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Journal of Environmental Sciences 2018年第12期30卷 79-87页

作者： Jianwei Dong xinghui xia Zhining Zhang Zixuan Liu xiaotian Zhang Husheng Li State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of EducationSchool of Environment Beijing Normal University Beijing 100875 China Center for Eco-Environmental Research Nanjing Hydraulic Research Institute Nanjing 210029 China Beijing Center for Physical & Chemical Analysis Beijing 100089 China Hubei Provincial Center for Disease Control and Prevention Wuhan 430079 China

Water regulation of the xiaolangdi Reservoir of the Yellow River was chosen as a case to investigate variations in concentrations and bioavailability of heavy metals caused by water conservancy projects in rivers. Water and suspended sediment（SPS） samples were collected at downstream sampling sites along the river during this period. Concentrations and speciation of Zn, Cr, Cu, Ni, and Pb in water and SPS samples were analyzed, and their bioaccumulation was studied with Daphnia magna. This study indicated that the exchangeable and carbonatebound fractions of heavy metals in SPS decreased along the studied stretch, and the dissolved heavy metal concentrations increased along the river with 1.6–15 folds. This is because sediment resuspension increased along the river during water regulation, giving rise to the increase of heavy metal release from SPS. The dissolved Zn, Cu, Ni, and Pb concentrations were significantly positively correlated with SPS concentrations, and their increase along the river was greater than Cr. The body burdens of heavy metals in D. magna exposed into samples collected from the reservoir outlet were 1.3–3.0 times lower than those from downstream stations, suggesting that the heavy metal bioavailability increased during water *** should be considered in the reservoir operation.

关键词： Heavy metals Speciation Bioaccumulation Suspended sediment Dam Water conservancy project

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