鄱阳湖湿地管理对策研究

本文分析和研究了鄱阳湖湿地损失的原因和管理现状，提出了鄱阳湖湿地可持续发展的管理策略。     

抚顺市水环境现状及其防治对策

随着非点源污染在水环境污染中所占比例越来越重,治理非点源污染问题迫在眉睫。本文在讨论了各种污水治理技术的前提下,提出了自己关于控制非点源污染的治理技术。     

湿地--连接陆地和水的纽带

从各方面综合论述了湿地的定义及其功能和价值 ,强调了保护湿地的重要意义。     

微生物对芦苇人工湿地除磷影响研究

以上海梦清园人工芦苇湿地为对象,在微生物制剂使用的同时研究了微生物对湿地除磷效果的影响。经过对近一年的数据分析表明,微生物的增加使总磷平均去除率达到20．9％,高于空白的18．3％。微生物的磷酸化作用使得出水磷更多以磷酸根形式表达,甚至使磷酸盐含量不降反升。底泥监测表明,微生物制剂的加入能有效的促进浮泥层中磷的转移,减缓浮泥层中磷的积累,10个月后试验组浮泥层的磷含量相对空白对照组可降低10％以上,菌剂对于减缓磷的积累,促进磷向基质转移有重要意义。     

人工湿地中植物的修复作用原理与应用实例

植物修复在水污染防治中具有重要作用,有着广泛的应用前景。本文阐述了水生植物在湿地污水净化过程中的物理、化学、生物等方面的作用及原理,例举了植物修复在不同水质条件下的应用实例,提出应针对植物复氧能力、植物种类选择和收割植物后续处理等方面进行深入研究。     

Exports of dissolved ammonium (NH4 +) during storm events across multiple catchments in a glaciated forested watershed

Storm event exports of dissolved were explored for multiple events in the Point Peter Brook watershed (PPBW), a glaciated, forested watershed located in Western New York, USA. Investigations were performed across four catchments (1.6–696 ha) with varying topography and the extent of surface-saturated areas. While wetland and riparian waters were important sources of during non-storm periods, throughfall and litter leachate were the dominant contributors of during storm events. Ammonium concentrations in catchment discharge displayed a sinusoidal seasonal pattern with a maximum during early spring (March) and a minimum in late summer (August–September). Storm event concentrations of in streamflow were much greater than baseflow values and showed a consistent temporal pattern with an increase in concentrations on the hydrograph rising limb, a peak at or before the discharge peak, followed by a decline in concentrations. Storm event patterns of DON were similar to while the patterns of differed from for the summer and fall events. The storm event expression of was attributed to throughfall and throughfall-mediated leaching of the litter layer. The reactive behavior of precluded its use in an end member mixing model (EMMA) for predicting streamflow concentrations. While concentrations of in precipitation and streamflow were high for the spring events, exports of in streamflow were highest for the large and intense storm events. Baseflow concentrations increased with the percent wetland/saturated area in the catchment but the same trend did not hold for storm-event concentrations.     

北方人工湿地污水处理技术应用研究与示范工程

针对北方地区气候特点,开展了人工湿地污水处理技术在北方的单元应用研究与工程示范。在设计上对潜流湿地越冬深度、填料结构、布集水系统和水位调整导淤方式进行优化创新,并采取了预处理与人工湿地组合工艺调节各季节运行效果;通过单元实验研究了湿地应用的工艺条件(深度、水力负荷、污染负荷),以及湿地的保温效果与全年运行效率;介绍了利用该技术建设的示范工程概况,分析了其产生的经济、社会与环境效益。     

潜流人工湿地污染河水处理系统中的填料堵塞问题研究

利用潜流人工湿地系统处理污染河水,水力负荷为0.15 m3/(m2·d).研究了该系统长期运行过程中的填料堵塞问题及其对污染物去除率的影响.构建了潜流人工湿地污染河水处理中试系统,在运行两年后,潜流人工湿地填料存在一定的堵塞现象,填料孔隙率最大减少了2.67%.填料孔隙堵塞现象主要发生在该中试系统的前段(沿水流方向距进水点0～5 m),其填料堵塞物质主要为无机颗粒物.植物对填料堵塞问题的改善作用并不显著.填料的部分堵塞对该中试系统中污染物的去除率有一定的影响,运行第2年氨氮的去除率略有降低,而COD的去除率有增加的趋势.     

Phytoremediation of engineered nanoparticles using aquatic plants: Mechanisms and practical feasibility

Certain plants have demonstrated the capability to take up and accumulate metals, thus offering the potential to remediate metal-contaminated water and sediment. Several aquatic species have further been identified which can take up metal and metal oxide engineered nanoparticles (ENPs). It is important to evaluate if aquatic plants exhibiting potential for metal phytoremediation can be applied to remediation of metallic ENPs. Understanding the interactions between ENPs and aquatic plants, and evaluating possible influences on metal uptake and phytoremediation processes is therefore essential. This review article will address the feasibility of green plants for treatment of ENP-affected aquatic ecosystems. Discussion will include common types of ENPs in current use; transformations of ENPs in aquatic systems; the importance of microorganisms in supporting plant growth; ENP entry into the plant; the influence of microorganisms in promoting plant uptake; and recent findings in phytoremediation of ENP-affected water, including applications to constructed wetlands.     

西部湿地资源现状、问题及可持续发展研究——以四川省若尔盖高原湿地为例

湿地是水陆相互作用形成的独特生态系统,合理的开发利用将对西部开发中的生态环境建设直到巨大的作用。本文主要介绍我国西部湿地资源的基本情况、利用现状及存在问题,并以四川省若尔盖地区为例提出了西部湿地资源保护和可持续利用的科学对策。