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Ladderane records over the last century in the East China sea: Proxies for anammox and eutrophication changes

WATER RESEARCH 2019年第Jun.1期156卷 297-304页

作者： zhao, Zongshan Cao, Yali Fan, Ying Yang, Haili Feng, xuwen Li, Li Zhang, Hailong Xing, Lei zhao, Meixun Ocean Univ China Inst Adv Ocean Study Minist Educ Key Lab Marine Chem Theory & Technol Qingdao 266100 Shandong Peoples R China Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266237 Shandong Peoples R China Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol CAS Key Lab Biobased Mat Qingdao 266101 Shandong Peoples R China Jiangxi Inst Anal & Test Nanchang 330029 Jiangxi Peoples R China State Ocean Adm Inst Oceanog 2 Hangzhou 310012 Zhejiang Peoples R China

Anaerobic ammonium oxidation (anammox), an important process for converting fixed nitrogen to N-2, plays an important role in the present-day marine nitrogen cycle. However, little is known about anammox activities in the past, especially in regions that were strongly affected by human activities, evidenced by eutrophication and hypoxia, which promote anammox bacteria growth. In this study, ladderanes have been measured in a sediment core and suspended particulate matter (SPM) in the East China Sea (ECS), to reconstruct the anammox record and to evaluate its responses to eutrophication and hypoxia. The detection and distribution of different ladderane lipids in SPM provide additional evidence that ladderanes were mostly produced in the water column and could reflect anammox activities. Summed ladderane content from the core varied between 11 and 300 ng/g dry weight (dw) sediment, with C20-[5]-ladderane fatty acid methyl esters (FAME) as the predominant compound (5-150 ng/g dw), followed by C20-[3]-ladderane FAME (1-110 ng/g dw), C18-[3]-ladderane FAME (1-32 ng/g dw) and 08 -[5]-ladderane FAME (3-11 ng/g dw). The detection of ladderanes over the last century indicate the existence of anammox in the past. The rapidly increasing trend of ladderanes since the 1960s correlates with an increase in phytoplankton biomarkers (2 Sigma(B + D + A), brassicasterol (B), dinosterol (D) and C-37 alkenones (A)), indicating that eutrophication exacerbated anammox growth. The co-variation between our ladderane record and published records of low-oxygen tolerant foraminiferal microfossils and hypoxia events over the past 60 years suggested that sediment ladderanes are a useful indicator for past changes of oxygen depletion or hypoxia in the ECS. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Anammox Ladderanes Nitrogen cycle Phytoplankton Hypoxia

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化工园区污水处理提标改造设计案例

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云南化工 2024年第8期51卷 160-163页

作者：项绪文袁志明沈军李体康赵伟李星山东省环科院环境工程有限公司山东济南250013

某化工园区污水处理厂工程建设规模为1.5万m^(3)/d,要求出水水质的COD及氨氮从《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准提标至《地表水环境质量标准》(GB3838-2002)IV类水。经改造后,污水处理厂的处理工艺为“缓冲... 详细信息

某化工园区污水处理厂工程建设规模为1.5万m^(3)/d,要求出水水质的COD及氨氮从《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准提标至《地表水环境质量标准》(GB3838-2002)IV类水。经改造后,污水处理厂的处理工艺为“缓冲水池+调节池+初沉池+臭氧氧化+厌氧水解+A/O+A/O+二沉池+絮凝沉淀池+分配池+臭氧催化氧化+活性焦吸附+紫外线消毒”。废水经过预处理及生化改造,解决了有机物去除及脱氮难的问题,通过臭氧催化氧化和活性焦的深度处理,保证了COD的指标,使水质达到新的排放标准。

关键词：化工园区废水处理提标改造臭氧催化氧化活性焦

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硅烷偶联剂改性的短切玄武岩纤维增强三元乙丙橡胶复合材料的研究

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化工新型材料 2024年第S01期52卷 199-204,211页

作者：李辉张卜方赵春霞向东王斌程金波黄浩然张旭文武元鹏西南石油大学新能源与材料学院成都610500

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙... 详细信息

将玄武岩纤维(BF)用硅烷偶联剂KH570改性后,制备了玄武岩纤维增强三元乙丙橡胶(E-BF7)复合材料,研究了玄武岩纤维用量对复合材料力学性能、热稳定性、动态热力学性能、耐水性能以及耐化学液体性能的影响。结果表明:与未加纤维的三元乙丙橡胶相比,添加15份KH570改性的玄武岩纤维BF7得到的三元乙丙橡胶复合材料E-BF7-15,拥有更好的综合性能。其拉伸强度从12.49MPa提高到14.50MPa,提高了16.1%,撕裂强度从41.47MPa提高到51.67MPa,提高了24.6%,其耐水性和耐化学液体性能也得到明显提升。

关键词：三元乙丙橡胶玄武岩纤维复合材料纤维改性硅烷偶联剂

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Geochemistry and sources of hydrate-bound gas in the Shenhu area, northern south China sea: Insights from drilling and gas hydrate production tests

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JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 2022年第PartC期208卷 109459-109459页

作者： Liang, Qianyong Xiao, Xi zhao, Jing Zhang, Wei Li, Yun Wu, Xuemin Ye, Jianliang Qin, xuwen Qiu, Haijun Liang, Jinqiang Lu, Jing'an Dong, Yifei Zhang, Tingting Xiong, Yongqiang Jiang, Wenmin Guo, Binbin China Geol Survey Guangzhou Marine Geol Survey Guangzhou 510075 Peoples R China China Geol Survey Nat Gas Hydrate Engn Technol Ctr Guangzhou 510075 Peoples R China Southern Marine Sci & Engn Guangdong Lab Guangzho Guangzhou 511458 Peoples R China Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Organ Geochem Guangzhou 510640 Peoples R China

Research on the origin and source of hydrate-bound gas and its relationship to deep conventional oil and gas accumulation in a basin is critical to understanding the accumulation mechanism of gas hydrates and to resource evaluation of gas hydrate accumulation. In this study, the hydrate-bound gas obtained via pressure coring and the production gas recovered during a production test on a gas hydrate reservoir in the Shenhu area offshore of Southern China were tested and discussed. The geochemical analysis results indicate that methane is the predominant gas, and heavier hydrocarbons (C2+) are also present but in low concentrations. The molecular compositions of the hydrate gas recovered from two production test sites are similar to those of the hydrate-bound gas acquired via pressure coring. In addition to the isotopic composition of the methane, the carbon and hydrogen isotopes of the C2+ hydrocarbons were obtained for the first time. The delta C-13 isotopes of the methane range from -66.6 parts per thousand to -46.2 parts per thousand, indicating that the hydrate-bound gases have a mixed origin, containing both biogenic and thermogenic gases. The plot of delta C-13(1) versus delta C-13(2) suggests that the biogenic and thermogenic hydrocarbons were derived from marine organic matter and terrestrial organic matter, respectively. The isotopic characterization of the hydrate-bound gas reveals that the thermogenic hydrate gas contains both humic-type gas and sapropel-type gas, but the sapropel-type gas is predominant. The source rocks of the thermogenic hydrate gas are interpreted to be both the gas-prone coal measure strata of the Enping Formation and the oil-prone medium-deep lacustrine strata of the Wenchang Formation, the latter of which contributed more to the hydrocarbon supply of the gas hydrates. In addition, the maturity of the source rocks of the thermogenic hydrate gas may be lower than that of the deeply buried conventional hydrocarbons discovered in the Ba

关键词： Gas hydrates Pressure core Production test Hydrate-bound gas Source rocks Migration Shenhu area Northern South China Sea

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聊城市区污水处理厂进水水质特征的统计学分析

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净水技术 2023年第9期42卷 104-115页

作者：刘娟贾新强沈军项绪文刘亚钦赵伟山东省环科院环境工程有限公司山东济南250013

根据聊城市区6座污水处理厂2022年监测数据,分析污水处理厂进水水质特征,包括进水指标COD_(Cr)、BOD_(5)、SS、氨氮、TN、TP的变化规律和概率统计分析,以及进水污染物的比例分析。结果表明,各项水质指标数据分布呈正偏态分布,各水质指... 详细信息

根据聊城市区6座污水处理厂2022年监测数据,分析污水处理厂进水水质特征,包括进水指标COD_(Cr)、BOD_(5)、SS、氨氮、TN、TP的变化规律和概率统计分析,以及进水污染物的比例分析。结果表明,各项水质指标数据分布呈正偏态分布,各水质指标间存在一定的线性关系,除BOD_(5)与COD_(Cr)、COD_(Cr)与TP、TN与氨氮的相关关系最为显著(R2=0.5635、0.5004、0.7750)外,其他指标间相关性均较弱,TP与SS几乎不存在线性关系。进水污染物营养分析表明,6座污水处理厂达到BOD_(5)/COD_(Cr)≥0.3的概率分别为100.00%、97.92%、95.12%、90.24%、97.87%和97.67%,表明污水处理厂的可生化性均较好;6座污水处理厂达到BOD_(5)/TN≥4的概率非常小,大部分污水处理厂碳源不足,需要额外增加碳源才能实现反硝化;6座污水处理厂达到BOD_(5)/TP≥17的概率分别为85.42%、52.08%、42.50%、29.27%、23.40%和44.19%,说明污水处理厂进水部分满足生物除磷的要求,可以采用生物除磷工艺;6座污水处理厂达到SS/BOD_(5)≥1.2的概率分别为100.00%、97.96%、25%、65.00%、33.30%和93.02%,说明污水处理厂进水中无机物质比较多。

关键词：污水处理厂进水水质水质特征营养物概率统计分析

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树脂整理面料交联程度的表征与评价

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印染助剂 2024年第9期41卷 63-66,75页

作者：王开苗瞿存明赵爱国李旭文耿彩花苏红升山东轻工职业学院山东淄博255300 淄博市生物基纺织新材料重点实验室山东淄博255300 传化智联股份有限公司浙江杭州311200 鲁丰织染有限公司山东淄博255100

用树脂含量法、纤维保水力法、染色K/S值计算法对树脂整理面料交联程度进行表征和评价,并通过实例来验证。结果表明,树脂含量法、纤维保水力法、染色K/S值计算法等均可用数据对树脂整理面料交联程度进行表征和评价;染色K/S值计算法相对... 详细信息

用树脂含量法、纤维保水力法、染色K/S值计算法对树脂整理面料交联程度进行表征和评价,并通过实例来验证。结果表明,树脂含量法、纤维保水力法、染色K/S值计算法等均可用数据对树脂整理面料交联程度进行表征和评价;染色K/S值计算法相对时间短,操作简单,更能客观准确地表征树脂交联程度,并且能测算出理论折皱回复角和洗后外观平整度。

关键词：交联程度树脂含量保水力法染色K/S值计算法

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Transcriptomic profiling of the high-vigour maize (Zea mays L.) hybrid variety response to cold and drought stresses during seed germination

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SCIENTIFIC REPORTS 2021年第1期11卷 1-16页

作者： Li, Heqin Yue, Haiwang Xie, Junliang Bu, Junzhou Li, Li Xin, Xueying zhao, Yanming Zhang, Haiyan Yang, Li Wang, Jianhua Jiang, xuwen Qingdao Agr Univ Coll Agron Maize Res Inst Qingdao 266109 Peoples R China Hebei Acad Agr & Forestry Sci Dryland Farming Inst Hengshui 053000 Peoples R China China Agr Univ Seed Sci & Technol Res Ctr Beijing 100193 Peoples R China Nat Resources & Planning Bur Hengshui City Taocheng Branch Hengshui 053000 Peoples R China

Abiotic stresses, including cold and drought, negatively affect maize (Zea mays L.) seed field emergence and later yield and quality. In order to reveal the molecular mechanism of maize seed resistance to abiotic stress at seed germination, the global transcriptome of high- vigour variety Zhongdi175 exposed to cold- and drought- stress was analyzed by RNA-seq. In the comparison between the control and different stressed sample, 12,299 differentially expressed genes (DEGs) were detected, of which 9605 and 7837 DEGs were identified under cold- and drought- stress, respectively. Functional annotation analysis suggested that stress response mediated by the pathways involving ribosome, phenylpropanoid biosynthesis and biosynthesis of secondary metabolites, among others. Of the obtained DEGs (12,299), 5,143 genes are common to cold- and drought- stress, at least 2248 TFs in 56 TF families were identified that are involved in cold and/or drought treatments during seed germination, including bHLH, NAC, MYB and WRKY families, which suggested that common mechanisms may be originated during maize seed germination in response to different abiotic stresses. This study will provide a better understanding of the molecular mechanism of response to abiotic stress during maize seed germination, and could be useful for cultivar improvement and breeding of high vigour maize cultivars.

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绿植光伏屋顶技术研究现状及存在的问题

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广州建筑 2024年第1期52卷 105-108页

作者：刘兆祥徐雯雯闫贵海龚超杨永友张涛中冶建筑研究总院(深圳)有限公司深圳518055 中冶建筑研究总院有限公司北京100088

绿植屋顶不仅可以有效美化建筑外观,还可以有效降低建筑能耗;光伏屋顶则可以在提供可再生能源的同时降低建筑物本身的能耗。为了充分利用二者的优势,学者们提出了绿植光伏屋顶的概念,将光伏屋顶和绿植屋顶进行有机结合,充分发挥了两者... 详细信息

绿植屋顶不仅可以有效美化建筑外观,还可以有效降低建筑能耗;光伏屋顶则可以在提供可再生能源的同时降低建筑物本身的能耗。为了充分利用二者的优势,学者们提出了绿植光伏屋顶的概念,将光伏屋顶和绿植屋顶进行有机结合,充分发挥了两者的优势。本文通过文献调研,对绿植光伏屋顶技术的研究现状及存在的问题进行了总结。绿植光伏屋顶具有提高能量效率、提高经济效率、降低碳排放及降低灰尘等优点,相较于单独的光伏或绿植屋顶更具优势。但是其发展仍面临缺乏综合实验研究和全生命周期分析,配套理念及设施不足等缺点,本文研究可以为绿色光伏屋顶后续研究提供参考。

关键词：绿植光伏屋顶绿植屋顶光伏组件研究现状存在问题

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南海西南次海盆深部结构研究进展与展望

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地质学报 2023年第8期97卷 2742-2755页

作者：秦绪文王利杰姚永坚李福元赵明辉张佳政王后金徐子英汪俊许鹤华路允乾张如伟张宝金中国地质调查局北京100037 中国地质调查局广州海洋地质调查局自然资源部海底矿产资源重点实验室广东广州511458 中国科学院南海海洋研究所边缘海与大洋地质重点实验室广东广州510301 南方海洋科学与工程广东省实验室(广州) 广东广州511458

西南次海盆位于南海渐进式扩张的西南端,共轭陆缘结构和残留扩张脊保留完整,是研究南海深部结构和动力学机制的关键区域。前期研究发现,西南次海盆洋陆过渡带较窄、同扩张断层发育、地震反射莫霍面不清晰、具有慢速扩张等特征。然而,由... 详细信息

西南次海盆位于南海渐进式扩张的西南端,共轭陆缘结构和残留扩张脊保留完整,是研究南海深部结构和动力学机制的关键区域。前期研究发现,西南次海盆洋陆过渡带较窄、同扩张断层发育、地震反射莫霍面不清晰、具有慢速扩张等特征。然而,由于不同探测方法获取的地壳结构具有多解性,使得西南次海盆洋陆转换过程、慢速扩张洋壳结构与增生模式以及龙门海山岩石性质与地幔成因机制等基础科学问题尚存争议。为此本文建议在西南次海盆开展地质取样获取海山岩石样品,确定其年龄与性质,分析扩张后海山形成的深部动力过程;并对关键构造部署高精度的地震反射/折射联合探测,结合岩石物理分析,对西南次海盆进行构造成像和物质组成参数正反演,以实现壳幔尺度的地震学透视,为探索西南次海盆洋陆转换过程和洋壳增生模式提供重要的证据,以丰富和完善南海的动力学演化模式。

关键词：深部结构洋陆转换带慢速扩张蛇纹石化地幔西南次海盆

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Phytoplankton community changes in a coastal upwelling system during the last century

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Global and Planetary Change 2023年 224卷

作者： Peng, Peng Bi, Rong Sachs, Julian P. Shi, Jie Luo, Yifei Chen, Weifang Huh, Chih-An Yu, Meng Cao, Yali Wang, Yaoyao Cao, Zhong Bao, Xiaohan Guo, Xinyu Li, Huijuan Feng, xuwen Li, Hongchun zhao, Meixun Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China Laoshan Laboratory Qingdao266237 China School of Oceanography University of Washington Box 355351 SeattleWA98195 United States Key laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Qingdao266100 China State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences Xiamen University Xiamen361102 China Institute of Earth Sciences Academia Sinica Taipei11529 Taiwan Yantai Maritime Safety Administration Yantai264000 China Jinan250014 China Second Institute of Oceanography Ministry of Natural Resources of People's Republic of China Hangzhou310012 China Department of Geosciences National Taiwan University Taipei10617 Taiwan

Phytoplankton communities in coastal upwelling systems are influenced by the interplay between human-induced and natural climate forcing that vary regionally and the two factors have not been well quantified. Combining lipid biomarker analyses in 23 sediment cores from the Zhejiang coast of the East China Sea and a physical-ecological model, we found that during the 1960s–2000s there was a 42 ± 4% increase in diatom proportions and a 17 ± 8% decrease in dinoflagellate proportions within the core upwelling area that is attributed to changes in Kuroshio Current transport and coastal upwelling. During the 1950s–2000s there was a 16 ± 8% increase in dinoflagellate proportions and 12 ± 4% decrease in diatom proportions outside the core upwelling area which is attributed to anthropogenic nutrient inputs and climate warming. Our results provide a novel approach to quantify mechanisms of past and future changes in marine phytoplankton communities. © 2023 Elsevier B.V.

关键词： Ocean currents

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