天然高分子改性阳离子絮凝剂的合成及其性能与机理的研究

以天然高分子物Ｆ６９１粉为原料，合成了一种新型阳离子絮凝剂ＦＮＱＤ。研究表明：在ＮａＯＨ／Ｆ６９１质量比１、穹剂／Ｆ６９１质量比１．５，反应温度５０℃、反应时间３ｈ条件下，ＦＮＱＤ具有优导的絮凝性能。当ＰＨ＝７、投加量３ｍｇ／１时，ＦＮＱＣＤ对市内悬浊度去除率〉９５％，絮凝性能明显优于ＰＡＭ－Ｃ。机理表明ＦＮＱＤ与胶体颗粒间的镶嵌式引力和ＦＮＱＤ分子链的半刚性结构是ＦＮＱＤ具有优异的絮凝性能和良好     

我国海洋资源开发利用综合效益评价研究

研究构建了我国海洋资源开发利用综合效益评价的指标体系,采用全排列多边形图示指标评价方法,对我国海洋资源开发利用综合效益状况进行了定量评价。结果表明,综合指数在2006年为0.381,在2009年为0.508。评价方法避免了目前评价研究中的弊病,既减少了主观随意性又反映了系统整合原理。     

Linking the electron donation capacity to the molecular composition of soil dissolved organic matter from the Three Gorges Reservoir areas, China

Soil dissolved organic matter(DOM) plays an essential role in the Three Gorges Reservoir(TGR) as a linkage between terrestrial and aquatic systems.In particular,the reducing capacities of soil DOM influence the geochemistry of contaminants such as mercury(Hg).However,few studies have investigated the molecular information of soil DOM and its relationship with relevant geochemic al reactivities,including redox properties.We collected samples from eight sites in the TGR areas and studied the link between the molecular characteristics of DOM and their electron donation capacities(EDCs) toward Hg(II).The average kinetic rate and EDC of soil DOM in TGR areas were(0.004±0.001) hr~(-1) and(2.88±1.39) nmol e~-/mg DOM_(bulk),respectively.Results suggest that higher EDCs and relatively rapid kinetics were related to the greater electron donating components of ligninderived and perhaps pyrogenic DOM,which are the aromatic constituents that influenced the reducing capacities of DOM in the present study.Molecular details revealed that even the typical autochthonous markers are important for the EDCs of DOM as well,in contrast to what is generally assumed.More studies identifying specific DOM molecular components involved in the abiotic reduction of Hg(II) are required to further understand the relations between DOM sources and their redox roles in the environmental fate of contaminants.     

不同层级环境应急救援资源储备体系建设探索——以安庆市粗苯泄漏事件为例

以安庆市粗苯泄漏事件为例,分析了事件特点及应急处置过程中存在的主要问题,阐述了环境应急救援资源储备体系在环境应急管理中的重要作用,从应急物资储备网络建设、应急救援装备储备网络建设和环境应急救援信息库建设3个方面探索了不同层级应急救援资源储备体系建设的重点内容,为环境应急救援资源储备体系建设提供参考。