校园水体富营养化现状与评价

以黄山学院水西湖为例,通过对该湖水水质的检测,了解水西湖的水质特点、污染状况、主要污染物,采用综合营养状态指数法评价水西湖水体富营养化状况。通过检测发现湖水中富营养化程度严重,N、P等元素超标严重水质很差,此次研究不但了解了水质状况,并且还找出了几处可能引起水质恶化的污染源。并对这些污染源可能对水西湖产生的影响进行了全面的分析论证。在文章的结尾处还提出了合理的处理措施,希望通过这些措施改善水环境状况,为校园景观水体的修复及保护提供对策。     

瑶湖水体富营养化的调查研究

通过对瑶湖水质现状进行调查，得出其水体已达富营养化水平，保护瑶湖势在必行。     

景观水体富营养化评价及原因分析

本文以总氮(TN)、总磷(TP)、叶绿素a(Chla)、高锰酸盐指数(COD_(Mn))、透明度(SD)等表征富营养化的指标作为评价因子,采用综合营养状态指数法评价关中地区典型城市渭南市两处景观水体富营养化情况。监测结果表明:两处景观水体均为中营养状态,但氮磷营养盐浓度较高,存在富营养化趋势。在监测研究基础上,分析原因提出相应治理对策。     

城区河流水体富营养化评价方法研究进展

河流水体富营养化是城区河流的主要环境问题之一,近年来得到了广泛的重视。但是城区河流水体富营养化成因复杂,污染物来源众多,富营养化评价的方法同样种类繁多,选取合适的方法进行城区河流水体富营养化评价成为了首要任务。本文选取了现有的几种常用富营养化评价方法介绍其原理,并对比分析了其优劣势,对现有工作进行了总结,以期为城区河流富营养化评价与治理提供参考。     

广州市海珠湿地北部地块水体富营养化评价与防治对策

文章在分析海珠湿地北部地块水体富营养化现状基础上,对比了现在国内治理水体富营养化的三种技术,认为海珠湿地适用于水生态修复治理技术,并提出了消除水体中的藻类、营造水体食物链、恢复物种多样性、营造生态水体景观以及加强后续维护管养等具体治理措施。     

花溪水库水体富营养化特征评价及防治对策

为了解花溪水库的富营养化现状,运用综合营养状态指数法对2012—2016年共5a的水质富营养化特征进行了分析评价。结果表明,花溪水库水体透明度年均值变化不大,pH值、高锰酸盐指数、叶绿素a有上升的趋势,总磷也时有超标现象。花溪水库有向富营养化发展的趋势,根据花溪水库污染源调查提出防治对策。     

胜利油田纯化水库富营养化状况调查与评价

为控制水体富营养化的发生，保证油田供水质量，本文分别运用指数法和特征法对油田主要饮水水源-纯化水库的营养状况进行了调查与评价，并提出了相关防治措施。     

胜利油田纯化水库富营养化状况调查与评价

为控制水体富营养化的发生,保证油田供水质量,本文分别运用指数法和特征法对油田主要饮水水源-纯化水库的营养状况进行了调查与评价,并提出了相关防治措施。     

水体富营养化与磷污染控制研究进展

重点对国内外在磷污染控制领域的研究进展进行了综合分析,并提出磷污染控制的可行性措施和建议,对进一步研究我国水体磷污染和治理富水体营养化方面具有一定的理论指导意义。     

浙江舟山岛近岸海水富营养化水平分析

根据2010年10月~2011年3月舟山岛近岸海水COD、无机氮（DIN）和磷酸盐（DIP）调查数据,对舟山岛近岸水体富营养化进行了分析和评价。结果表明舟山岛海域处于严重的富营养化状态,富营养化状态指数中COD占优势,其次为DIN,这两者起到了绝对性作用。水体营养等级基本为富营养化,且在舟山岛海域藻类生长基本上是受氮限...     

汕头近岸海域氮、磷的变化趋势及潜在性富营养化研究

本文通过对2012~2015年汕头近岸海域水体中的无机氮DIN(NH_4-N、NO_2-N和NO_3-N)、活性磷酸盐DIP的结构和分布特征进行分析,并结合水质状况对该海域的富营养化水平进行评价。结果表明:调查期间,汕头近岸海域海水质量总体状况良好,无机氮、磷含量范围在海水水质二至三类标准之间,显示其主要污染源是地表径流和港湾排污。潜在性富营养化评价结果显示:在调查的各个水期中,有67.9%站位的海水水质的平均状况属于中度营养(Ⅱ),26.2%站位的海水水质的平均状况属于富营养(Ⅲ),(Ⅲ)类水质都是出现在S2、S4站位。     

紧水滩水库龙泉段水体营养化状况的调查分析

通过对紧水滩水库龙泉段水质监测结果的综合评价分析,基本掌握了紧水滩水库水体的营养化状况及其变化情况,即水库水质已有好转趋势,处于中营养水平;对叶绿素a与环境因子进行了相关分析,叶绿素a与pH、溶解氧、总氮、总磷和高锰酸盐指数呈现显著的正相关关系,与水温呈偏相关,与透明度呈显著负相关关系。     

Investigation of Ozone Reaction in River Waters Causing Instantaneous Ozone Demand

Ozone consumption by water can be characterized by the instantaneous ozone demand (IOD) and a pseudo first order decay constant. Utilizing the flow injection analytical system for measuring IOD, the instantaneous ozone demand characteristics of two river waters (Korea) were investigated, utilizing a ?OH probe compound and ?OH scavenger, and were compared with those of two commercial humic acids (the Suwannee River humic acid and Aldrich humic acid). The major findings were as follows; (1) The IOD in river waters was found to be mainly due to the reaction of the ozone with natural organic matter (NOM), which constituted approximately 0.26–0.29?mg/mg DOC, and was responsible for the consumption of more than 40% of the applied ozone. Whereas, the IOD of the two commercial humic acids were three times more than those of the river waters. (2) The IOD in the river waters was mainly caused by the direct ozone reaction with dissolved organics, not from the ?OH mediated ozone reaction. However, for the two commercial humic acids, more than 40% of the IOD came from the ?OH mediated ozone reaction. (3) The hydrophobic fractions of the dissolved organics in the river waters were mainly responsible for the IOD. The IOD of the hydrophobic organics was approximately ten times larger than that of the hydrophilic organics. Although the exact magnitude of the IOD, and the relative importance of the direct/indirect ozone reaction with river water may vary greatly depending upon the source of the NOM, the characteristics of the IOD compromise a significant fraction of the ozone dose need (especially in achieving good ozone disinfection) in water treatment plants.     

基于环境一号卫星的东洞庭湖富营养化评价

水体富营养化现象是一个世界性的水污染治理难题。洞庭湖是我国第二大淡水湖,其富营养化问题也慢慢变成一个阻碍当地经济发展的瓶颈。保护洞庭湖湿地生态环境,控制湖水富营养化,是洞庭湖区环境治理的首要任务。本文利用遥感技术,对环境一号卫星CCD遥感数据进行了处理,并从处理后的遥感图像中识别了2009年6月~10月东洞庭湖水体富营养化状况,并与实测数据计算综合营养状况指数对识别的结果进行对比,结果表明对遥感图像进行识别的结论与实地测量的情况基本一致,证明了环境一号卫星数据在湖泊水质遥感监测中的适用性。通过对东洞庭湖水质作出全面评价,为洞庭湖的水体生态环境保护提供了重要的理论基础。     

空气中氟化物测定影响因素的探讨

目前测定环境空气中氟化物常采用滤膜采样氟离子选择电极法。该方法对操作要求比较严格,结合实际工作经验,针对试剂、滤膜、氟离子选择电极、空白值、操作及采样过程对测定结果产生的影响进行了探讨。     

行动导向教学存在的主要问题调查与分析

为分析行动导向教学效率影响因素,合理选择教学方法,课题组对职业院校行动导向教学专项调查。经过统计分析,提出了职教教学投入、教学方法选用策略和教学组织方式三个方面的建议。     

Biofouling Growth in Cold Estuarine Waters and Evaluation of Some Chitosan and Copper Anti-Fouling Paints

Ecological concerns about antifouling paints containing non-green tin and copper compounds have highlighted the need for environmentally friendly alternatives. We report here a field test conducted in estuarine waters over two months designed to evaluate the efficiency of a number of active natural and man-made chemical ingredients added into a silicon-polyurethane marine paint. Early steps of biofouling in cold seawater of the St. Lawrence Estuary (Canada) were observed. Analyses, including dry biomass, flow cytometry and spectrofluorimetry, demonstrated a short-term antibacterial action of chitosan-based paints although no significant anti-algal action was observed. Cuprous oxide paints were efficient against bacteria and algae invasion in the first two weeks, especially those with added organic biocides such as isothiazolone and copper pyrithione. However, the overall dry biomass and chlorophyll a content were similar for all chitosan-and copper-based paints after 63 days. Microscopic observations revealed variation in the highly diverse benthic diatom population including species Navicula, Melosira, Cocconeis, Nitshzcia, Fragilaria and Amphora. Results suggest no real long-term efficiency for tested antifouling paints and highlight a particular need for green antifouling ingredients that are active under northern estuarine conditions.