不同吸附剂处理废水中磷的对比研究

为了降低富营养化,实验中讨论了粉煤灰、活性炭两种吸附剂对人工配制的含磷废水的去除效果。从投药量、废水pH值以及振荡时间三个方面考察了对吸附作用的影响。实验结果显示：粉煤灰对磷的去除效果远比活性炭的好,而且还可达到以废治废的效果。粉煤灰、活性炭的最佳投药量分别为0．06g／ml、0．05g／ml;最佳pH值均为6;最佳振荡时间分别为5h、7h;在上述条件下,粉煤灰对磷的吸附率可达90．38％,而活性炭则为31．54％。     

混合条件对氢氧化镁混凝性能及絮体特性影响

以氢氧化镁作为混凝剂,不同浊度高岭土水样为研究对象,运用iPDA在线监测技术,探求了混合条件对絮体特性和混凝过程的影响;结果表明:快速搅拌转速增大到250 r/min,絮凝效果最好,继续增大,效果变差;随着快速搅拌时间延长到60 s时,絮凝效果逐渐变好,继续延长时间,R值变小絮体细碎;加入超声时,产生的超声振动和冲击力使得絮体被冲击碎,絮凝效果变差;慢速搅拌转速增大至60 r/min时,絮凝效果逐渐变好,再继续延长R值变小。     

山东省辖淮河流域河流水质趋势的灰色预测

目前,灰色系统模型越来越多地应用在水质预测中。山东省辖淮河流域包括南四湖流域和沂沭河流域,流域区域内的河流水质不仅与区域的社会经济发展相互联系,而且也影响着南水北调东线的水质。因此,依据2000-2009年流域内河流的国控断面高锰酸钾指数、NH3-N的监测数据资料,在对数据进行处理的基础上,文章利用灰色GM(1,1)模型结合新陈代谢原理预测河流水质的发展趋势。结果表明:大多数河流水质呈好转的趋势,但河流水环境变好趋势较缓慢,特别是沭河高峰头断面的水质呈变差趋势。河流水质的变化趋势应值得高度重视,为区域水环境保护和制定水环境规划提供参考。     

远程数值模拟技术在赤潮应急监测中的应用研究

根据赤潮灾害应急监测的需要,以应急监测实施为出发点,基于水动力数值模拟技术和赤潮藻种扩散模拟技术,建立可业务化应用的赤潮应急监测远程数值模拟平台。平台可成为多部门应对赤潮灾害的协同工作平台,为管理部门提供赤潮发生后藻种的漂移方向、扩散范围等信息,并为监测队伍提供监测范围指引。平台的构建实现了对突发性赤潮灾害的远程智能分析和决策支持,提高了赤潮应急监测方案的合理性和监测实施的有效性。     

燃烧对SF6扩散影响的示踪试验研究

根据2010年9月,在北京某试验场开展的一系列SF6示踪扩散试验,以及获取的SF6浓度空间分布数据,以高斯模式和计算机拟合为基础,计算出SF6浓度分布在水平和垂直方向的扩散标准差、地面峰值浓度等参数,分析、总结出了在典型地理(山区和平原连接处)和边界层条件下燃烧对SF6扩散的影响。通过试验及分析可知,燃油对试验区域气流产生了明显扰动,但具体原理有待于进一步分析。     

Impact of waste of COVID-19 protective equipment on the environment,animals and human health: a review

Environmental Chemistry Letters - During the Corona Virus Disease 2019 (COVID-19) pandemic, protective equipment, such as masks, gloves and shields, has become mandatory to prevent person-to-person...     

Promotional effect of ZrO2 and WO3 on bimetallic Pt-Pd diesel oxidation catalyst

Environmental Science and Pollution Research - Diesel oxidation catalysts Pt-Pd-(y)ZrO2-(z)WO3/CeZrOx-Al2O3 with total Pt & Pd loading of only 0.68 wt.% were prepared and investigated for...     

A novel proton-gradient-transfer acid complexes as an efficient and reusable catalyst for fatty acid esterification

In this work, a series of novel proton-gradient-transfer acid complexes (PGTACs) were developed. Their physicochemical properties, including thermal stability, melting point, and Hammett acidity, were measured. The effects of catalyst loading, reaction temperature, and substrate expansion on the catalytic performance were systematically studied. It is found that the combination of bidentate N-heterocycle and H2SO4 (1:2 M ratio) could form simultaneously N–H covalent bond and N…H hydrogen bond, which makes the PGTACs excellent catalysts integrate the advantages of strong acids (high catalytic activity) and ionic liquids (phase separation) in the esterification reaction. Moreover, these PGTACs can be reused by convenient phase separation without obvious diminution of catalytic activity. It is concluded that these PGTACs are potential alternative candidates for esterification reaction in the process of industrial catalysis.     

Fiscal decentralization,government innovation preference,and haze pollution

Local governments are the dominant players in haze pollution control; furthermore, financial power reconstruction affects the effectiveness of haze control. Government innovation preference achieves win-win results for environmental protection and economic development by increasing innovation support. Therefore, a moderating variable for government innovation preference was added to the fiscal decentralization effect on haze pollution, and their interactive effect on haze pollution was studied. This study was conducted in 30 provincial regions. Thus, the severity of regional haze pollution differs because of temporal heterogeneity and asynchronous development. Furthermore, we analyzed the impact on haze pollution from the perspectives of the temporal and spatial differences in different regions of China. The results indicate that (1) fiscal decentralization increases haze pollution, while government innovation preferences control it. (2) In a local evaluation model with a diversified background, fiscal decentralization restrains haze pollution, and pollution source complexity reduces government innovation preference’s control pollution function. The interaction term revealed that government innovation preferences had a significant moderating effect. (3) Fiscal decentralization and government innovation preferences control the heterogeneity of haze pollution in different regions.

     

Interactions between tannins allelochemicals and extracellular polymeric substance (EPS) of Microcystis aeruginosa

Environmental Science and Pollution Research - The protective mechanism of extracellular polymeric substance (EPS) secreted by a harmful cyanobacteria against tannins allelochemicals was explored...