检索结果-南通市图书馆

Journal of Environmental Sciences 2018年第8期30卷 54-62页

作者： Yin Zhou Dong Xu Enrong Xiao Dan Xu Peng Xu Xia Zhang Qiaohong Zhou Feng He Zhenbin Wu State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China School of Resource and Environmental Engineering Wuhan University of TechnologyWuhan 430070China

To find suitable wetland plants for constructed wetland-microbial fuel cells（CW-MFCs）,four commonly used wetland plants, including Canna indica, Cyperus alternifolius L., Acorus calamus, and Arundo donax, were investigated for their electrogenic performance and physiological changes during non-growing seasons. The maximum power output of12.82 mW/m^2 was achieved in the A. donax CW-MFC only when root exudates were being released. The results also showed that use of an additional carbon source could remarkably improve the performance of electricity generation in the C. indica and A. donax CW-MFCs at relatively low temperatures（2–15°C）. However, A. calamus withered before the end of the experiment, whereas the other three plants survived the winter safely, although their relative growth rate values and the maximum quantum yield of PSII（Fv/Fm） significantly declined, and free proline and malondialdehyde significantly accumulated in their *** the basis of correlation analysis, temperature had a greater effect on plant physiology than voltage. The results offer a valuable reference for plant selection for CW-MFCs.

关键词： wetland plants Microbial fuel cells Physiological changes Power production

Investigation of trace metals distribution in water,sediments and wetland plants of Kizilirmak Delta,Turkey

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2017年第1期32卷 90-97页

作者： Mehmet Soner Engin Ahmet Uyanik Seydahmet Cay Department of Food Engineering Faculty of EngineeringGiresun University Department of Chemistry Faculty of Science and ArtsOndokuz Mayis University Department of Environmental Engineering Faculty of EngineeringGiresun University

In this study,accumulation and distribution of Pb,Cu,Zn,Co,Ni,Mn and Fe in water,bottom sediments and four plant species(Myriophyllum verticillatum,Hydrocharis morsus-ranae,Nymphaea alba and Typha latifolia) were investigated in Cernek Lake of Kizilirmak *** Kizilirmak Delta is one of the largest natural wetlands of Turkey and it is protected by the Ramsar convention since *** physico-chemical parameters such as pH,conductivity and dissolved oxygen and also trace metal concentrations were monitored in *** the parameters obtained were found higher than that of the national standards for the protected lakes and *** accumulated amounts of various trace metals in bottom sediments and wetland plants were found in the following order of Fe>Mn>Zn>Ni>Co>Cu>Pb and Fe>Mn>Zn>Ni>Co *** historical trace metal intake of Myriophyllum verticillatum,Hydrocharis morsus-ranae,Typha latifolia and Nymphaea alba were obtained higher than that of the toxic metal levels and these plants may be accepted as accumulators for the detected trace metals and also bioindicators in the historically polluted natural areas.

关键词： Trace metals wetland plants BCF Pollution Phytoremediation Kizilirmak Delta

Metal accumulation and tolerance in wetland plants

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Biology 2009年第3期4卷 282-288页

作者： Junxing YANG Zhihong YE State Key Laboratory for Bio-control and School of Life Sciences Sun Yat-sen(Zhongshan)UniversityGuangzhou 510275China

This paper briefly reviews the progress in studies of wetland plants in terms of heavy metal *** current research mainly includes the following areas:(1)metal uptake,translocation,and distributions in wetland plants and toxicological effects on wetland plants,(2)radial oxygen loss(ROL)of wetland plants and its effects on metal mobility in rhizosphere soils,(3)constitutional metal tolerance in wetland plants,and(4)mechanisms of metal tolerance by wetland *** a number of accomplishments have been achieved,many issues still remain *** future research effort is likely to focus on the ROL of wetland plants affecting metal speciation and bioavailability in rhizosphere soils,and the development of rhizosphere management technologies to facilitate and improve practical applications of phytoremediation of metalpolluted soils.

关键词： metal tolerance wetland plants mobility radial oxygen loss(ROL)

Removal,distribution and plant uptake of perfluorooctane sulfonate(PFOS)in a simulated constructed wetland system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2021年第2期15卷 43-53页

作者： Weichuan Qiao Rong Li Tianhao Tang Achuo Anitta Zuh Department of Environmental Engineering College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China

A vertical-flow constructed wetland(VFCW)was used to treat simulated domestic sewage containing perfluorooctane sulfonate(PFOS).The removal rate of PFOS in the domestic sewage was 93%–98%,through soil adsorption and plant uptake,suggesting that VFCWs can remove PFOS efficiently from *** removal of PFOS in the VFCW was dependent on soil adsorption and plant uptake;moreover,the percentage of soil adsorption was 61%–89%,and was higher than that of the plants uptake(5%–31%).The absorption capacity of Eichhornia crassipes(***)(1186.71 mg/kg)was higher than that of Cyperus alternifolius(***)(162.77 mg/kg)under 10 mg/L PFOS,and the transfer factor of PFOS in *** and *** was 0.04 and 0.58,respectively,indicating that PFOS is not easily translocated to leaves from roots of wetland plants;moreover,uptake of PFOS by *** was more than that of *** because the biomass of *** was more than that of *** and the roots of *** can take up PFOS directly from wastewater while *** needs to do so via its roots in the *** concentration of 10 mg/L PFOS had an obvious inhibitory effect on the removal rate of total nitrogen,total phosphorus,chemical oxygen demand,and ammonia nitrogen in the VFCW,which decreased by 15%,10%,10%and 12%,*** with PFOS in the wastewater reduced the bacterial richness but increased the diversity in soil because PFOS stimulated the growth of PFOS-tolerant strains.

关键词： Vertical-flow constructed wetland Perfluorooctane sulfonate wetland plants Soil microbial community Effect

Toxic effect of perfluorooctane sulfonate on plants in vertical-flow constructed wetlands

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2020年第6期32卷 176-186页

作者： Rong Li Tianhao Tang Weichuan Qiao Jun Huang Department of Environmental Engineering College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China School of Environment Beijing Key Laboratory for Emerging Organic Contaminants Control(BKLEOC)State Key Joint Laboratory of Environment Simulation and Pollution Control(SKLESPC)Tsinghua UniversityBeijing 100084China

Per-and polyfluoroalkyl substances(PFASs)can be taken up and bioaccumulated in plants,but the toxic mechanisms of PFASs on wetland plants are still *** present study,the toxic influences of perfluorooctane sulfonate(PFOS)on Eichhornia crassipes(***)and Cy perus alternifolius(***)in a vertical-sub surface-flow constructed wetland were *** results showed that *** was more tolerant to PFOS stress than ***,and the growth and chlorophyll synthesis of the two plants were promoted by low concentration(plants increased,peroxidase activity decreased under exposure to high concentrations of PFOS,and superoxide dismutase activity did not *** PFOS stress,the membrane of plant leaves and the cell structure of the two wetland plants were destroyed,and the mitochondrial contour of root cells became *** analysis showed that the expression levels of genes related to cell wall formation,the cell apoptosis pathway,material synthesis,and metabolism in the plants were changed by *** in fluorogenic quantitative real time polymerase chain reaction(RT-qPCR)also confirmed that the photosynthesis system of *** was inhibited,while that of *** was promoted.

关键词： Perfluorooctane sulfonate wetland plants Toxicity Vertical-flow constructed wetlands Effect

Effects of silver nanoparticles on resistance characteristics of the wetland plant Typha orientalis in a hydroponic system

在线全文

学校读者我要写书评

暂无评论

Journal of Southeast University(English Edition) 2019年第3期35卷 381-388页

作者： Ma Yixuan Huang Juan Cao Chong Cai Wenshu Xiao Jun Yan Chunni School of Civil Engineering Southeast UniversityNanjing 210096China

To probe the influence and the adverse-resistance characteristics of wetland plants in presence of silver nanoparticles (AgNPs), the changes in the physiological and biochemical characteristics (including the superoxide dismutase (SOD) activity, catalase (CAT) activity, peroxidase (POD) activity, soluble protein content, and chlorophyll content) of Typha orientalis exposed to different concentrations of AgNPs solutions (0, 0.1, 1, 20 and 40 mg/L) were explored. Meantime, the accumulation of silver content in these plants was revealed. The results show that under low concentrations of AgNPs, the SOD and POD activities in the leaves of Typha orientalis are strengthened to different degrees. However, high concentrations of AgNPs inhibit the activities of SOD and POD. Under the stress of different concentrations of AgNPs, the CAT activities are inhibited initially and later recovered to some extent. Under the stress of low concentrations of AgNPs, the soluble protein content in the leaves of Typha orientalis increases significantly, but decreases more significantly with increasing concentrations of AgNPs. Low concentrations of AgNPs promote chlorophyll synthesis in the leaves of Typha orientalis , but the chlorophyll content subsequently falls to pre-stress levels. In contrast, high concentrations of AgNPs cause a certain inhibition to generate chlorophyll. Meanwhile, the results show that the silver concentrations of plant tissues increase with the exposure of concentrations of AgNPs and they have a positive relationship with the exposure of concentrations of AgNPs.

关键词： silver nanoparticles (AgNPs) wetland plants Typha orientalis physiological and biochemical characteristics antioxidase

Optimization of wetland Plant Selection and Configuration in Urban Water Environment Ecological Restoration Projects

在线全文

学校读者我要写书评

暂无评论

Journal of Architectural Research and Development 2024年第6期8卷 11-16页

作者： Junyi Huang Guan Wang Xi’an University of Technology Xi’an 710054China Xing Zhi College of Xi’an University of Finance and Economics Xi’an 710038China

In urban water ecological restoration projects,the selection and configuration of wetland plants are crucial for water quality improvement,ecological diversity enhancement,and landscape *** plants have different characteristics,and a scientific and rational selection and optimization of plant species is *** paper proposes an optimized plant selection and configuration scheme for urban water ecological restoration based on the ecological characteristics and pollutant removal performance of wetland *** analyzes the diversity,removal mechanisms,and configuration modes of wetland plants,taking into account ecology,aesthetics,and cost-effectiveness,to provide scientific evidence for wetland plant configuration and support water environment management decision-making.

关键词： wetland plants Water environment restoration Plant configuration optimization Pollutant removal Ecological restoration

The effect of temperature changes and K supply on the reproduction and growth of Bolboschoenus planiculmis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2021年第2期14卷 337-347页

作者： Ying Liu Christoph Bachofen Yanjing Lou Zhi Ding Ming Jiang Xianguo Lü Nina Buchmann The Three Gorges Institute of Ecological Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Key Laboratory of wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130012China Institute of Agricultural Sciences Department of Environmental Systems ScienceETH ZürichZürich 8092Switzerland Plant Ecology Research Lab—PERL Environmental Engineering InstituteSchool of ArchitectureCivil and Environmental EngineeringEPFL LausanneLausanne 1015Switzerland Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions College of Environment and PlanningHenan UniversityKaifeng 475004China

Aims Climate warming and agricultural non-point source pollution both resulting from anthropogenic activities have been projected to affect plant reproduction and growth in wetlands *** order to predict and mitigate impacts of these anthropogenic activities,it is important to investigate how marsh plants respond to such environmental *** In this study,Bolboschoenus planiculmis,a tuberous sedge with a wide distribution range in Eurasia,was selected to examine the effect of air temperature changes(15,20 and 25°C over 24 h;20/10 and 30/15°C,day/night)and K supply(0,1,3,9 and 18 mmol/L)on its reproductive and growth traits in climate *** Findings We found that high constant temperatures(20 and 25°C)were more beneficial for tuberization of *** than high alternating temperatures(30/15°C),whereas aboveground biomass and shoot height were generally largest at high temperatures(30/15 and 25°C).Both reproductive and growth traits of *** showed hump-shaped relationships with K supply,with an optimum K concentration of around 1–3 mmol/*** combination of high constant temperatures and optimal K concentrations promoted reproductive traits the most,whereas the combination of higher temperatures(30/15 and 25°C)and K concentrations up to 9 mmol/L increased growth traits *** therefore conclude that population abundance of *** might benefit from global warming and the additional K supply.

关键词： climate warming non-point source pollution functional traits clonal reproduction wetland plants marsh

The Effect of Baffled Surface Flow wetlands on Water Purification

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2010年第6期11卷 164-168页

作者：郭萧张颖赵安娜潘继征李文朝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江苏南京210008 中国科学院研究生院北京100049 河海大学环境科学与工程学院江苏南京210008

[Objective] The effect of baffled surface flow wetlands on water purification was studied in order to provide a reference for the ecological restoration of polluted river.[Method] Contents of some indexes like DO,TN,TP,NH＋4-N,CODCr,SS,SD,*** determined in the band baffled surface flow wetlands with total area of 7 400 m2 at JiaLu riverside.[Result] Baffled surface flow wetlands could improve the effluent quality significantly,could enhance transparency and dissolved oxygen content and also could decrease SS *** removal rate of TN was kept at more than 73% in summer and decreased to 23% in early winter;The removal rate of TP was little influenced by temperature,and it was kept at more than 77% in summer and still kept at more than 69% in autumn and winter;The removal rate of NH＋4-N was kept at more than 83% in summer and decreased slightly in autumn and winter,but still kept at more than 75%;The removal rate of CODCr ranged from 14% to 50%.[Conclusion] Baffled surface flow wetlands could effectively improve the purification effect of surface flow wetlands,which is a feasible way for ecological restoration.

关键词： Baffled surface flow wetlands wetland plants Purification effect