电动生物修复湖泊底泥中直链烷基苯磺酸钠

直链烷基苯磺酸钠(Linear Alkylbenzene Sulfonates,LAS)是环境中最常见的具有代表性的一类有机污染物,城市湖泊长期以来接纳了大量的污染物,致使底泥沉积了大最的LAS.采用电动生物复合技术修复东湖底泥中LAS,由于其LAS含量过高,当直接添加芽孢杆菌降解LAS时,发现无明显的降解效果.经过驯...     

云南星云湖南岸生态整治规划

阐述了高原湖泊星云湖的自然条件、污染根源和景观特点,在此基础上通过本项目星云湖南岸(一期)生态整治规划,尝试在整个流域范围内运用GIS分析生态湿地建设、农业面源污染控制和重现滨水空间等,改善星云湖的水质,提高星云湖及周边的生态旅游价值.规划采用顶端控制和底端治理相结合的策略,恢复星云湖流域的生态功能,解决星云湖流域现有...     

Beyond hypoxia：Occurrence and characteristics of black blooms due to the decomposition of the submerged plant Potamogeton crispus in a shallow lake

Organic matter-induced black blooms(hypoxia and an offensive odor) are a serious ecosystem disasters that have occurred in some large eutrophic shallow lakes in China. In this study, we investigated two separate black blooms that were induced by Potamogeton crispus in Lake Taihu, China. The main physical and chemical characteristics, including color- and odor-related substances, of the black blooms were analyzed. The black blooms were characterized by low dissolved oxygen concentration(close to 0 mg/L), low oxidation-reduction potential, and relatively low pH of overlying water. Notably higher Fe2+and∑S2-were found in the black-bloom waters than in waters not affected by black blooms. The black color of the water may be attributable to the high concentration of these elements, as black FeS was considered to be the main substance causing the black color of blooms in freshwater lakes. Volatile organic sulfur compounds, including dimethyl sulfide, dimethyl disulfide, and dimethyl trisulfide, were very abundant in the black-bloom waters. The massive anoxic degradation of dead Potamogeton crispus plants released dimethyl sulfide, dimethyl disulfide, and dimethyl trisulfide, which were the main odor-causing compounds in the black blooms. The black blooms also induced an increase in ammonium nitrogen and soluble reactive phosphorus levels in the overlying waters. This extreme phenomenon not only heavily influenced the original lake ecosystem but also greatly changed the cycling of Fe, S, and nutrients in the water column.     

Submerged vegetation removal promotes shift of dominant phytoplankton functional groups in a eutrophic lake

Historical data indicate that the dominance of submerged plants in Dianchi Lake in the 1960 s was characterized by low algal density with dominance of non-toxic group J（Scenedesmus,Pediastrum,etc.）. The removal of submerged plants,which began in the 1970 s,resulted in the expansion of bloom-forming Microcystis（group M）. Laboratory experiments suggested that Microcystis aeruginosa was inclined to grow and develop at elevated temperatures. The growth of Scenedesmus obliquus was slower than that of co-cultivated M. aeruginosa in the absence of Ceratophyllum demersum,especially at higher temperatures. The existence of submerged plant C. demersum could inhibit the growth of the harmful algae M. aeruginosa and this inhibitory effect by C. demersum was enhanced with an increase in temperature. Instead,with C. demersum,the growth of S. obliquus was not inhibited,but the co-cultivated M. aeruginosa was eliminated in a short time. Combined with the historical data and laboratory experiments,it was indicated that the submerged plants might play important roles in the dominance of the non-toxic group J in the historical succession. Consequently,the introduction of the submerged plant such as C. demersum might alter the dominant phytoplankton functional groups from M to J and benefit the restoration of the eutrophic lake.     

澳大利亚湖泊水环境保护与管理

<正>澳大利亚地处南半球,孤悬于太平洋与印度洋之间,四面环海,是世界上唯一一个独占一个大陆的国家。澳大利亚人口2327万,相当于欧洲的4/5。国土面积为769.2万平方公里,东西距离约4000千米,南北距离约3860千米,居世界第六位,而人口密度为世界上最低的国家,平均每平方千米仅有3人。全澳划分为六个州和两个地区。东部是山地,中部是平原,西部是高原。内陆为荒芜人烟的沙漠,干旱少雨,气温高,温差大;在沿海地区,雨量充沛,气候湿     

常见卫星传感器在蓝藻水华监测中的应用进展

在全球气候变暖的背景下,湖泊富营养化程度日益加剧导致了全球范围内蓝藻水华暴发频次和暴发范围的逐步增加。利用传统水质监测方法实现蓝藻水华的实时动态监测尚存困难,而遥感技术具有监测范围广、速度快和成本低等优势,于蓝藻水华动态监测中得到了广泛应用。文章在介绍湖泊蓝藻水华遥感监测的原理和方法的基础上,对几种常见卫星传感器在湖泊蓝藻水华监测中的应用现状进行了总结,对比了各种传感器和反演模型的优缺点,最后对目前湖泊蓝藻水华遥感监测研究中存在的不足和发展方向作了分析和展望。     

城市水系浅水湖泊水环境质量评价与分析

为研究城市浅水湖泊水生态环境状况,以邯郸市南湖为例,采用单因子评价法、综合污染指数法和综合营养状态指数法,按照《地表水环境质量标准》(GB3838-2002)Ⅲ类水体水质标准对水环境质量进行评价和分析。结果表明,氮、磷是南湖水体的污染控制因子,各采样点的TN、TP均不能满足Ⅴ类水体的水质要求;生活污水、工业废水和岸边垃圾堆放是南湖的主要污染源,相应采样点的污染指数分别达到了3.0和2.2;南湖水质整体处于轻度富营养水平,距污染源较近区域已处于中度富营养水平。     

浅析湖泊环境中凤尾莲的化感作用

综述了凤尾莲抑藻化感作用及其对其他植物的影响,凤尾莲化感物质及其作用机理,其他植物对凤尾莲的化感作用。认为在下一步的工作中,应着重对凤尾莲化感作用涉及到的生理、生化和生态机制开展研究。     

《环境科学导刊》征稿简则

正《环境科学导刊》,投稿及联系邮箱:ynhjkx@yies.org.cn;电话(传真):0871-64142389;国内统一刊号:CN53-1205/X;国际标准刊号:ISSN1673-9655。《环境科学导刊》是云南省环境保护厅主管,云南省环境科学研究院主办的学术类环境科技双月刊。刊物力求反映环境科学的研究成果、应用技术、新理论、新方法,活跃学术气氛,促进学术交流。《环境科学导刊》设置有科研专题研究、环境管理、水环境保护、高原湖泊研究、生态环境保护、污染防治、污染治理技术、大气污染防治、农业环境保护、环境与人体健康、环境监测、环境影响评价等栏目。欢迎     

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正《环境科学导刊》,投稿及联系邮箱:ynhjkx@yies.org.cn;电话(传真):0871-64142389;国内统一刊号:CN53-1205/X;国际标准刊号:ISSN1673-9655。《环境科学导刊》(原《云南环境科学》)创刊于1982年,是云南省环境保护厅主管,云南省环境科学研究院主办,全国公开发行的环保科技期刊。本刊主要刊登环境科学学术性论文、环境科研报告及介绍环境工程应用技术的文章。主要栏目有:科研专题研究、环境管理、水环境保护、高原湖泊研究、生态环境保