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Geographical features and development models of estuarine cities

Journal of Geographical Sciences 2024年第1期34卷 25-40页

作者： CHEN Mingxing XIAN Yue HUANG Yaohuan SUN Zhigang WU Chengbin Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resource and Environment University of Chinese Academy of SciencesBejing 100049China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China Zhongke shandong Dongying Institute of Geography Dongying 257509ShandongChina CAs engineering Laboratory for yellow river delta Modern Agriculture Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

Cities are the key areas for human beings to achieve sustainable development goals in the future.Estuarine cities are a special type of coastal city in urgent need of a clear definition.This paper proposed that estuarine cities are cities developed on the coast where rivers and oceans meet and defined four connotations,including the intersection of rivers and marine water systems,the coordinated development of land and oceans,the location advantages of connecting rivers and seas,and the important fragility of the ecological environment.We used Hydro SHEDS,OSM,GPW,and urban socioeconomic statistics and selected 50 estuarine cities with large rivers as representatives to summarize the main geographical basis and socioeconomic characteristics.Cities are primarily found in low-altitude,flat regions with average annual temperatures that mainly vary from 10℃to 25℃,relatively abundant precipitation,and extensive biological resources.There are substantial variations in the socioeconomic features of estuarine cities.We proposed eight development patterns,including open and inclusive city spirit,high-quality livable cities,high-quality development driven by innovation,integration of internal and external communication with ports and cities,construction of an international financial center,ecological environment protection and restoration,active promotion of cultural tourism,and positive international exchanges.

关键词： estuarine cities great rivers development models sustainability physical geography socioeconomy

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Study on Performance and Influencing Factors of H2O2 Production by Bioelectrochemical System

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Agricultural Biotechnology 2019年第5期8卷 99-101页

作者： Jiqiang ZHANG shandong engineering and technology research center for ecological fragile belt of yellow river delta Binzhou University

This study used a bioelectrochemical system (BES) to produce H2O2.Seven cycles after the addition of microorganisms,the BES started successfully and entered a stable operation period.During stable operation,the voltage was 581 mV,the COD removal efficiency at the anode was 85.39%,and the H 2O 2 mass concentration at the cathode was 0.5%.After the addition of 10% of graphite particles in the reaction chamber,the H2O2 production increased by 13%.After loading Pt-containing carbon black catalyst on the cathode,the H2O2 production increased by 34%.The mass concentration of H2O2 was 0.67% under the optimum process conditions of a cathode loaded with Pt-containing carbon black catalyst,pH=7,and dissolved oxygen of 8 mg/L.

关键词： BES H2O2 Influencing factor Chemical row material

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Levels and Potential ecological Risk Assessment of Heavy Metals in Sediments of Longjiang Wetland in Binzhou City

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Journal of Landscape research 2019年第6期11卷 37-39,44页

作者： WANG Zihao ZHANG Zaiwang LI Luzhen MENG Xiangfang LI Xiaomeng College of Biological and Environmental engineering Binzhou UniversityBinzhouShandong 256603China shandong engineering and technology research center for ecological fragile belt of yellow river delta Binzhou UniversityBinzhouShandong 256603China

Wetland is a unique habitat with great biodiversity and important ecological functions between land and water on the earth. With the irrational utilization of wetland resources, the ecological destruction and pollution of wetland are becoming more and more serious. To evaluate the pollution of heavy metals in the sediments of Longjiang Wetland in Binzhou City, chromium(Cr), copper(Cu), zinc(Zn), cadmium(Cd) and lead(Pb) were measured by inductively coupled plasma mass spectrometry. Concentrations of Cr, Cu, Zn, Cd and Pb in the sediments were 5.3–13.6, 5.6–15.0, 16.6–33.0, 0.1–0.4 and 7.9–24.9 mg/kg dry weight, respectively. The concentrations of heavy metals in Longjiang Wetland was lower than soil background values of shandong Province and in lower level compared with those reported in sediments/soils of wetlands in some other locations. Based on geo-accumulation index(Igeo), Cr, Cu, Zn and Pb showed low levels of contamination at all stations, while Cd was observed at a moderate pollution degree. Potential ecological risk factor(E_r^i) and risk index(RI) values showed low ecological risk of heavy metals in sediments of the wetland.

关键词： Heavy metal Longjiang Wetland Sediment Potential ecological risk assessment

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Simultaneous Denitrification and Carbon Removal in Microbial Fuel Cells

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Asian Agricultural research 2019年第6期11卷 47-49页

作者： Zhenbo SUN Yujin LI Kejia WEI Jiqiang ZHANG Haiying GUO Jing CAI shandong engineering and technology research center for ecological fragile belt of yellow river delta Binzhou University Binzhou 256603 China College of Environmental Science and engineering Zhejiang Gongshang University Hangzhou 310018 China

In this article,microbial fuel cell( MFC) was used for simultaneous denitrification and carbon removal to ascertain their electricity generation performance. The results showed that strengthening domestication and enrichment of electrogenic bacteria had the best start-up effect. An increase in volumetric loading reduced the rate of pollutant removal but promoted the output voltage. The changes of working conditions such as influent concentration,sludge concentration and temperature had a great influence on the electricity generation performance of MFC,and their optimum values were 500 mg/L,2 000 mg/L and 35℃,respectively.

关键词： Microbial fuel cell (MFC) Denitrification Carbon removal Electricity production performance

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Mechanism of Simultaneous Nitrogen Removal and Electricity Generation by Microbial Fuel Cell

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Meteorological and Environmental research 2019年第5期10卷 125-127页

作者： Tong Xue Wang Mingxia Shao Huijun Zhang Jiqiang Guo Haiying Cai Jing shandong engineering and technology research center for ecological fragile belt of yellow river delta Binzhou UniversityBinzhou 256603China College of Environmental Science and engineering Zhejiang Gongshang UniversityHangzhou 310018China

The working mechanism of MFC used for simultaneous nitrogen removal and electricity generation was studied.The results show that the electrode biofilms and suspension had different modes of electron transfer.The microorganisms growing on the electrodes and bioflocs could transfer electrons by direct contact and intermediaries respectively.The electrode biofilms and bioflocs were dominant in different functional spaces,and played a synergistic role in the process of contaminant removal,but showed a certain competitive relationship in the process of electricity generation.This study can provide a theoretical basis for the development of a new low-consumption wastewater treatment technology and promote technological innovation in wastewater treatment.

关键词： Microbial fuel cell Simultaneous nitrogen removal and electricity generation Electron transfer Functional space

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Pollution characteristics and risk assessment of organophosphate esters in aquaculture farms and natural water bodies adjacent to the Huanghe river delta

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Journal of Oceanology and Limnology 2023年第1期41卷 251-266页

作者： Jinyu CHAO Song FENG Yingdong HAO Jianing LIN Bin ZHANG School of Architecture and Civil engineering Xihua UniversityChengdu 610039China Institute of Eco Environmental Forensics Shandong UniversityQingdao 266237China School of Environmental Science and engineering Shandong UniversityQingdao 266237China School of Food and Biotechnology Xihua UniversityChengdu 610039China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China shandong yellow river delta National Nature Reserve Administration Committee Dongying 257091China

To date,little attention has been paid to the effects of organophosphate esters(OPEs)pollution on aquacultural environment and aquatic product safety.Huanghe(yellow)river delta area is one of the largest aquaculture centers in China,where ecological security protection is crucial in the national strategy of China.To explore the pollution characteristics,bioaccumulation,and health risks of OPEs in aquaculture farms in the Huanghe river delta and natural water bodies in the adjacent seas,five species of organisms from different farm types nearby the Huanghe river delta,and the corresponding culture water and sediments were sampled in this study.The total concentrations of Σ_(13)OPEs in water,sediments,and organisms were 51.53-272.18 ng/L,52.63-63.17 ng/g dry weight(dw),and 46.82-108.90 ng/g dw,respectively.Among the five types of culture ponds,the water samples from the swimming crab and hairy crab culture ponds exhibited higher OPEs,the concentration of OPEs in the sediments from the few ponds was relatively balanced,and the OPEs in the organism from the holothurian ponds was higher.Tris(1,3-dichloro-2-isopropyl pho sphate)(TDCP)was the main contaminant in water samples and tripropyl phosphate(TPrP)in sediments and organisms.However,trisphenyl phosphate(TPhP)showed the strongest bioaccumulation ability,followed by 2-ethylhexyl diphenyl phosphate(EHDPP)and TPrP.The bioaccumulation capacities of the five species were as follows:prawn>holothurian>hairy crab>swimming crab>carp.These five types of organisms,as main seafood in human consumption,were at low risk of negative impacts of pollution.However,the risk from the mixture of organophosphate flame retardants(OPFRs)still requires more attention due to the increasing consumption and production in the world.

关键词： organophosphate esters(OPEs) aquaculture farms bioaccumulation health risk assessment

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Invasive Spartina alterniflora accelerates the increase in microbial nitrogen fixation over nitrogen removal in coastal wetlands of China

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Eco-Environment & Health 2023年第3期2卷 184-192页

作者： Shuntao Chen Dengzhou Gao Xiaofei Li Yuhui Niu Cheng Liu Dongyao Sun Yanling Zheng Hongpo Dong Xia Liang Guoyu Yin Xianbiao Lin Min Liu Lijun Hou State Key Laboratory of Estuarine and Coastal research East China Normal UniversityShanghai 200241China Key Laboratory of Geographic Information Science of the Ministry of Education College of Geographical SciencesEast China Normal UniversityShanghai 200241China shandong Key Laboratory of Eco-Environmental Science for the yellow river delta Binzhou UniversityBinzhou 256600China School of Geography Science and Geomatics engineering Suzhou University of Science and TechnologySuzhou 215009China Frontiers Science center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China

Salt marsh plants play a vital role in mediating nitrogen(N)biogeochemical cycle in estuarine and coastal ecosystems.However,the effects of invasive Spartina alterniflora on N fixation and removal,as well as how these two processes balance to determine the N budget,remain unclear.Here,simultaneous quantifications of N fixation and removal via^(15)N tracing experiment with native Phragmites australis,invasive S.alterniflora,and bare flats as well as corresponding functional gene abundance by qPCR were carried out to explore the response of N dynamics to S.alterniflora invasion.Our results showed that N fixation and removal rates ranged from 0.77±0.08 to 16.12±1.13 nmol/(g·h)and from 1.42±0.14 to 16.35±1.10 nmol/(g·h),respectively,and invasive S.alterniflora generally facilitated the two processes rates.Based on the difference between N removal and fixation rates,net N_(2)fluxes were estimated in the range of-0.39±0.14 to 8.24±2.23 nmol/(g·h).Estimated net N_(2)fluxes in S.alterniflora stands were lower than those in bare flats and P.australis stands,indicating that the increase in N removal caused by S.alterniflora invasion may be more than offset by N fixation process.Random forest analysis revealed that functional microorganisms were the most important factor associated with the corresponding N transformation process.Overall,our results highlight the importance of N fixation in evaluating N budget of estuarine and coastal wetlands,providing valuable insights into the ecological effect of S.alterniflora invasion.

关键词： Salt marsh plant N removal N fixation N budget Estuarine and coastal ecosystems

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Biophysical warming patterns of an open-top chamber and its short-term influence on a Phragmites wetland ecosystem in China

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China Geology 2023年第4期6卷 594-610页

作者： Xue-yang Yu Si-yuan Ye Li-xin Pei Liu-juan Xie Ken W.Krauss Samantha K.Chapman Hans Brix Key Laboratory of Coastal Wetland Biogeosciences Qingdao Institute of Marine GeologyChina Geological SurveyMinistry of Natural ResourcesQingdao 266071China Institute of Marine Science and technology Shandong UniversityQingdao 266237China Wetland and Aquatic research center U.S.Geological SurveyLafayette 70506United States of America Department of Biology Villanova UniversityVillanova 19085United States of America Department of Biology Aarhus UniversityAarhus 8000CDenmark

Passive-warming, open-top chambers(OTCs) are widely applied for studying the effects of future climate warming on coastal wetlands. In this study, a set of six OTCs were established at a Phragmites wetland located in the yellow river delta of Dongying City, China. With data collected through online transmission and in-situ sensors, the attributes and patterns of realized OTCs warming are demonstrated.The authors also quantified the preliminary influence of experimental chamber warming on plant traits.OTCs produced an elevated average air temperature of 0.8°C(relative to controls) during the growing season(June to October) of 2018, and soil temperatures actually decreased by 0.54°C at a depth of 5 cm and 0.46°C at a depth of 30 cm in the OTCs. Variations in diel patterns of warming depend greatly on the heat sources of incoming radiation in the daytime versus soil heat flux at night. Warming effects were often larger during instantaneous analyses and influenced OTCs air temperatures from-2.5°C to 8.3°C dependent on various meteorological conditions at any given time, ranging from cooling influences from vertical heat exchange and vegetation to radiation-associated warming. Night-time temperature depressions in the OTCs were due to the low turbulence inside OTCs and changes in surface soilatmosphere heat transfer. Plant shoot density, basal diameter, and biomass of Phragmites decreased by23.2%, 6.3%, and 34.0%, respectively, under experimental warming versus controls, and plant height increased by 4.3%, reflecting less carbon allocation to stem structures as plants in the OTCs experienced simultaneous wind buffering. While these passive-warming OTCs created the desired warming effects both to the atmosphere and soils, pest damages on the plant leaves and lodging within the OTCs were extensive and serious, creating the need to consider control options for these chambers and the replicated OTCs studies underway in other Chinese Phragmites marshes(Panjin and Yancheng).

关键词： Open-top chambers(OTCs)warming Phragmites australis wetland Short-term ecosystem impact Climate warming Soil heat flux Soil-atmosphere heat transfer ecological geological engineering Hydrogeological engineering yellow river delta

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The comprehensive evaluation on resource environmental bearing capacity of central cities in the yellow river delta-A case study on Dongying City

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Journal of Groundwater Science and engineering 2017年第4期5卷 354-363页

作者： WANG Kui-feng XU Meng CHEN Xiao-man shandong Institute and Laboratory of Geological Sciences Key Laboratory of Geological Process and Resource Utilization of Metallic Minerals in ShandongKey Laboratory of Gold Mineralization Process and Resource Utilization Subordinate to the Ministryof Land and ResourceJinan 250013China Key Laboratory of Assessing Resource Environmental bearing capacity Ministry of Land and Resources(Chinese Academy of Land and Resource EconomicsChina University of Geosciences in Beijing)Beijing 101149China School of Civil engineering Shandong UniversityJinan 250061China Guangdong research center for Geoanalysis GuangzhouGuangdong Province 510080China

Dongying City, which is the most important central city in the yellow river delta, is located in the estuary of the yellow river. With a short land formation time, ecological environment is very weak in this area. To realize the sustainable economic development of the yellow river delta, resource environment and resource environmental bearing capacity(REBC) must be improved. This study builds assessment system of regional REBC through resource and economic characteristics in yellow river delta and uses principal component analysis(PCA) method to evaluate REBC of five counties and districts in Dongying City in 2011-2015 on the dimensions of time and space. Results show that, on the time dimension, Guangrao County is ranked first, Dongying district second for four years and Hekou and Kenli districts with lower ranks in 2012-2015, indicating that more attention needs to be paid to REBC of Hekou and Dongying districts and these two districts should be included into key monitoring areas. From space scale, REBC in five counties and districts has been gradually improving. In order to further develop REBC in Dongying City, measures such as intensifying protection of urban ecological environment and developing circular economy, etc. should be implemented.

关键词： Resource environmental bearing capacity Dongying City Comprehensive evaluation yellow river delta

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