检索结果-南通市图书馆

Comparison of three flocculants for heavy cyanobacterial bloom mitigation and subsequent environmental impact

Journal of Oceanology and Limnology 2022年第5期40卷 1764-1773页

作者： Kaixuan LIU Lei JIANG Jinsheng YANG Shuzhan MA Kaining CHEN Yufeng ZHANG Xiaoli SHI Department of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Jiangsu Collaborative Innovation Center of Regional Modern Agriculture&Environmental Protection Huaiyin Normal UniversityHuaiyin 223001China

Cyanobacteria can accumulate as a heavy biomass on the leeward side of large eutrophic lakes,posing a potential threat to public health.The mitigating capacity of three flocculants and their potential impacts on the major environmental features of water and sediments was evaluated.Results indicate that polyaluminum chloride(PAC)and ferric chloride(FeCl)are efficient flocculants that can rapidly mitigate cyanobacterial blooms with chlorophyll-a concentrations higher tnan 1500 ug/L within 15 min.In comparison,cationic starch with chitosan could only treat cyanobacterial blooms in chlorophyll-a concentrations of less than 200μg/L.The addition of FeClcaused a decline in the pH value,while dissolved oxygen in the water column dropped to 2 mg/L during cationic starch with chitosan treatment for a high cyanobacterial biomass group.Thus,a combination of flocculants and oxygenators should be considered when treating high-concentration cyanobacterial blooms for emergency purposes.Additionally,the cell lysis of cyanobacteria caused by cationic starch with chitosan can result in an increase in total dissolved phosphorus and total dissolved nitrogen.Furthermore,the high accumlation of nutrients in sediments after the settling of cyanobacteria can cause high internal phosphorus pollution.The increase in the total organic carbon of the sediments can threaten lake restoration achieved by planting submerged macrophytes.

关键词： cyanobacterial bloom emergency control flocculants lake restoration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Succession of Aphanizomenon flos-aquae and Microcystis aeruginosa in direct co-culture experiments at different temperatures and biomasses

引用

Journal of Oceanology and Limnology 2022年第5期40卷 1819-1828页

作者： Qianzhi WEN Peng XIAO Hua LI Wenke LI Gongliang YU Renhui LI Key Laboratory of Algal Biology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China College of Life and Environmental Sciences Wenzhou UniversityWenzhou 325035China

cyanobacterial blooms have become a serious global environmental issue due to their potential risk for releasing detrimental secondary metabolites into aquatic ecosystems,posing a great threat to water quality management for public health authorities.Aphanizomenon,a common filamentous cyanobacterial genus belonging to Nostocales,is under particular concern because its several members are able to form harmful blooms.Furthermore,succession of bloom between A.flos-aquae and Microcystis occurs in many natural lakes.To evaluate the competitiveness of A.flos-aquae vs.M.aeruginosa,two sets of experiments at different ratios of biomass at 15℃and 25℃were conducted.Results show that at 15℃,the two species were able to coexist,and A.flos-aquae showed a specific higher growth rate,and its growth was promoted by the presence of M.aeruginosa.At 25℃,the growth of A.flos-aquae was inhibited by the biomass of M.aeruginosa,and M.aeruginosa suppressed A.flos-aquae in competition.Additionally,the vegetative cell size of A.flos-aquae was significantly influenced by the co-culture with M.aeruginosa,whereas the filament length of A.flos-aquae was not significantly affected.This study confirms that temperature is the dominating factor on the succession of A.flos-aquae and M.aeruginosa of a different biomass.

关键词： cyanobacterial bloom Aphanizomenon flos-aquae Microcystis aeruginosa succession temperature biomass

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Eutrophication development and its key regulating factors in a water-supply reservoir in North China

引用

Journal of Environmental Sciences 2013年第5期25卷 962-970页

作者： Liping Wang Lusan Liu Binghui Zheng State Environmental Protection Key Laboratory of Estuary and Coastal Environment Chinese Research Academy of Environmental Sciences

Yanghe Reservoir is an important source of drinking water for Qinhuangdao City,North China;however,in recent decades this water source has been eutrophic with recurrent summer cyanobacterial blooms.The trophic grade of the system in summer was mesotrophiceutrophic in 1990 and became hypertrophic in 2011.The nutrient availability is extremely high during the entire year,and the water temperature should be the primary driver of the summer blooms.In May-October of 2010 and 2011,abrupt variations were observed in the Secchi depth（SD） and chlorophyll a（Chl-a）,and both the correlated analysis of Chl-a-SD and trophic status indices（TSI） deviation（TSI Chl-a-TSI SD） showed that algal cell density dominated light attenuation.During the algal bloom outbreak,the microcystin concentration was found to vary between 0.35-2.12 μg/L in 2010 and 0.11-1.86 μg/L in 2011.The maximum microcystin content was more than two times the safety limit required for drinking water.Inflow discharges were most concentrated in the summer,with periods of lower residence time and the largest water level fluctuation over the entire year.When a high availability of nutrients promoted a high Chl-a concentration in the whole system,it appeared that the instability caused by the decrease in residence time could not produce effective changes in the cyanobacterial abundance.The results indicated that nutrient enrichment in the aquatic systems of Yanghe Reservoir is the most serious problem and that the status would not been modified effectively by increasing hydrological fluctuations（e.g.,decreasing the residence time）.Therefore,decreasing the nutrient concentrations is the only route to improve the water quality of this reservoir.

关键词： eutrophication trophic state cyanobacterial bloom limiting factors water-supply reservoir

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pre-oxidation enhanced cyanobacteria removal in drinking water treatment: A review

引用

Journal of Environmental Sciences 2021年第12期33卷 160-168页

作者： Jing Qi Baiwen Ma Shiyu Miao Ruiping Liu Chengzhi Hu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

cyanobacterial bloom has many adverse effects on source water quality and drinking water production. The traditional water treatment process can hardly achieve satisfactory removal of algae cells. This review examines the impact of pre-oxidation on the removal of cyanobacteria by solid-liquid separation processes. It was reported that the introduction of chemical oxidants such as chlorine, potassium permanganate, and ozone in algae-laden water pretreatment could improve algae removal by the subsequent solid-liquid separation processes. However, over dosed oxidants can result in more serious water quality risks due to significant algae cell lysis and undesirable intracellular organic matter release. It was suggested that moderate pre-oxidation may enhance the removal of cyanobacteria without damaging algae cells. In this article, effects of moderate pretreatment on the solid-liquid separation processes(sedimentation, dissolved air flotation, and membrane filtration) are reviewed.

关键词： cyanobacterial bloom Pre-oxidation Sedimentation Dissolved air flotation Membrane filtration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Variation of cyanobacteria with different environmental conditions in Nansi Lake,China

引用

Journal of Environmental Sciences 2012年第8期24卷 1394-1402页

作者： Chang Tian Haiyan Pei Wenrong Hu Jun Xie School of Environmental Science and Engineering Shandong UniversityJinan 250061China Shandong Provincial Engineering Center on Environmental Science and Technology Jinan 250061China Shandong Environmental Monitoring Central Station Jinan 250013China

Nansi Lake is located on the east line of the South-to-North Water Diversion Project in China. A comprehensive study was carried out to investigate the spatial and temporal distribution of cyanobacteria in the lake from June 2008 to May 2011 based on monthly sample monitoring from five stations. The effect of environmental factors on cyanobacterial abundance was also evaluated. The eyanobaeterial community contained 15 genera and 23 species. The cyanobacterial abundance of each monitoring station ranged from 0 to 1.53x 107 cells/L with an average of 1.45~ 106 cells/L, which accounted for 11.66% of the total phytoplankton abundance. The dominant species of cyanobacteria were Pseudanabaena （32.94%） and Merismopedia （19.85%）, not the bloom-forming algae such as Microcystis and Anabaena. In addition, the cyanobacterial community structure and water quality variables changed substantially over the survey period. Redundancy analysis （RDA） suggested that temperature and phosphorus were important environmental factors that affected cyanobacteria. Temperature was the most important factor affecting cyanobacterial abundance. The effect of phosphorus on cyanobacterial abundance was more notable in warm periods than in periods with low temperature.

关键词： cyanobacteria Nansi Lake cyanobacterial bloom South-to-North Water Diversion Project

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Environmental factors influencing cyanobacteria community structure in Dongping Lake, China

引用

Journal of Environmental Sciences 2013年第11期25卷 2196-2206页

作者： Xuetang Lu Chang Tian Haiyan Pei Wenrong Hu Jun Xie School of Environmental Science and Engineering Shandong University Shandong Provincial Engineering Center on Environmental Science and Technology Plant Functional Biology and Climate Change Cluster Faculty of Science University of Technology Sydney Shandong Environmental Monitoring Central Station

The present study was conducted to provide a detailed understanding of the variation in cyanobacterial communities of Dongping Lake, which is the final water volume adjusting and storing lake in the east route of the South-to-North Water Diversion Project in China. The spatial and temporal distribution of cyanobacteria was assessed from May 2010 to October 2012 based on monthly samples collected from three stations. Over the 30-month survey, 15 genera and 25 species of cyanobacteria were identified, with cyanobacterial abundance at each monitoring station ranging from undetected to 3.04×10^7 cells/L, average of 4.27×10^6 cells/L. The dominant cyanobacterial species were Pseudanabaena limnetica and Aphanizomenon issatschenkoi and not the usual bloom-forming genera such as Microcystis and Anabaena. cyanobacterial community structure and water quality variables exhibited substantial changes over the period of survey. Redundancy analysis, Pearson correlations, and regression analysis were applied to analyze the relationships among the variables. The results suggested that temperature and chemical oxygen demand were key drivers of the cyanobacterial community composition in Dongping Lake. In addition, the concentration of inorganic nitrogen in the lake had a profound effect on the cyanobacterial abundance as a non-limiting factor in warm periods.

关键词： cyanobacteria Dongping Lake cyanobacterial bloom South-to-North Water Diversion Project

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Annual variation of phytoplankton communities and its driving environmental factors in a subtropical mussel-fish integrated pond in China

Annual variation of phytoplankton communities and its drivin...

引用

第十二届浙江渔业科技论坛

作者： A.J.ZHANG S.L.LIU J.Y.ZHU J.D.LIU Z.M.GU G.F.ZHANG K.H.LU Key Laboratory of Applied Marine Biotechnology Ministry of EducationSchool of Marine SciencesNingbo University Key Laboratory of Healthy Freshwater Aquaculture Ministry of AgricultureKey Laboratory of Freshwater Aquatic Animal Genetic and Breeding of Zhejiang provinceZhejiang Institute of Freshwater Fisheries JinHua Polytechnic College

In mis study,phytoplankton communities as well as environmental factors in a subtropical mussel-fish integrated pond in China were investigated during December 2012 to November 2013.Phytoplankton showed distinct seasonal density shifts in community structure at both taxonomic and functional levels.Cryptophyta was the dominant assemblage in low and moderate temperature,especially in January,April and May.Cryptophyta was gradually replaced by Cyanophyta with increase in temperature and formed cyanobacterial bloom in July.Chlorophyta became the most dominant group in the following six months with the second dominant assemblages of Cyanophyta,Cryptophyta and Bacillariophyta every two months in turn.Bacillariophyta was the dominant assemblage in March with low temperature and nutrients concentration.It appeared that water temperature and total nitrogen(TN) were the most critical factors driving phytoplankton community shift in terms of density and biomass,respectively.

关键词： cyanobacterial bloom Phytoplankton community Temperature Temporal variation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Ammonia May Play an lmportant Role in the Succession of cyanobacterial blooms and the Distribution of Dominant Algal Species in the Freshwater

Ammonia May Play an lmportant Role in the Succession of Cyan...

引用

中国藻类学会第八次会员大会暨第十六次学术讨论会

作者： Guo-Zheng Dai,Jin-Long Shang & Bao-Sheng Qiu~* College of Life Sciences,Central China Normal University,Luoyu Road 152,Wuhan 430079, Hubei,People’ s Republic of China Hubei Key Laboratory of Genetic Regulation and Integrative Biology,Central China Normal University,Wuhan 430079,Hubei,P.R.China

With the human intensification of agricultural and industrial activities, large amount of reduced nitrogen enter into the biosphere,which consequently results in the development of global eutrophication and cyanobacterial blooms.However,no research had reported the effect of ammonia toxicity on the algal succession.In this study,we investigated the ammonia toxicity to nineteen algal species or strains to test the hypothesis that ammonia may regulate the succession of cyanobacterial blooms and the distribution of dominant algal species in the freshwater lakes.The bloom-forming cyanobacterium Microcystis aeruginosa PCC 7806 suffered from ammonia toxicity at high pH value and light intensity conditions.Low NH4CI concentration(0.06 mmol·L) resulted in the decrease of operational PSII quantum yield by 50%compared to the control exposed to 1000 u mol photons·m·s for one hour at pH 9.0±0.2,which can be reached in freshwater lakes.Furthermore,the tolerant abilities to NH toxicity of eighteen freshwater algal species or strains were as follows:hypertrophication species>eutrophication species>mesotrophication species>oligotrophication species. The different sensitivities of NH3 toxicity could well explain the distributing rule of algal species in the freshwater lakes of different trophic states.Meanwhile,the cyanobacterial bloom(e.g.M.aeruginosa) always happened at the low concentration of ammonia in summer,and disappeared with the decrease of ammonia.This may be attributed to the toxic effect of ammonia to M.aeruginosa in spring(the average and maximum ammonia concentration were 0.08 mmolμL and 0.72 mmolμL in 33 Chinese lakes),and the low level of NH-N concentration in summer and fall in the lakes might be used as preferred nitrogen nutrition by M.aeruginosa,rather than with toxicity.Therefore,ammonia could be a key factor to determine the dominant distribution of algal species and cyanobacterial bloom in the freshwater systems.

关键词： Ammonia cyanobacterial bloom Eutrophication Microcystis aeruginosa

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：