阻止杭州湾海底输油管线穿孔、溢油的设想

对海底管线穿孔后如何阻止溢油、减少海上.油污染,提出了采用负压保护的可行性方案.     

钢铁行业大气环境影响评价方法与建议

按钢铁行业大气环评报告书的结构和顺序,结合HJ 2.2-2008《环境影响评价技术导则大气环境》中的相关技术要求,从评价因子、源强、评价等级、大气监测、大气预测、防护距离等方面出发,分析了钢铁行业大气环评中的评价等级确定、大气监测、大气预测等工作中存在的问题,并提出解决方案和建议对策。     

Modification of Ce02-ZrO2 catalyst by potassium for NOx-assisted soot oxidation

Potassium-modified ceria-zirconia catalyst was synthesized by wetness impregnation method. The ageing treatment was performed in static air at 800℃ for 20 hr to evaluate the thermal stability of the catalyst. The catalysts were characterized by X-ray diffraction,BET surface area, oxygen storage capacity, NOx-temperature programmed desorption and soot-temperature programmed oxidation measurements. By introduction of potassium, the maximum soot oxidation rate temperature (Tm) of the ceria-zirconia based catalyst decreased from 525 to 428℃ in the presence of NO under a loose contact mode. The shift of Tm of the K-modified catalyst after ageing is only 15℃. The enhanced activity of the aged catalyst mainly lies in the promotional effect of potassium on the NOx/oxygen storage cacity as well as the soot-catalyst contact.     

火焰原子吸收光谱法测定电镀废水中高浓度的锡

采用盐酸消解样品,用火焰原子吸收光谱法测定电镀废水中高浓度的锡的质量浓度,方法简单可靠。通过实验样品的分析,验证了方法的准确度和精密度。该方法干扰少,数据准确,适合废水分析。     

SCADA系统在污染物治污工况在线监控系统中的应用

本文介绍了SCADA系统在内蒙古自治区重点污染源治污工况在线监控系统中的应用,系统以西门子成熟S7—200系列可编程序控制器为在线监测设备,基于OPC（OLE for Process Control）技术,以WINCC为监控平台,实现了自治区内重点污染源企业治污工况的远程监测、污染物排放的有效管理。     

Removal of phosphate from wastewater using alkaline residue

Alkaline residue(AR) was found to be an efficient adsorbent for phosphate removal from wastewater. The kinetic and equilibrium of phosphate removal were investigated to evaluate the performance of modified alkaline residue. After treatment by NaOH(AR-NaOH), removal performance was significantly improved, while removal performance was almost completely lost after treatment by HCl(AR-HCl). The kinetics of the removal process by all adsorbents was well characterized by the pseudo second-order model. The Langmuir model exhibited the best correlation for AR-HCl, while AR was effectively described by Freundlich model. Both models were well fitted to AR-NaOH. The maximum adsorption capacities calculated from Langmuir equation were in following manner: AR-NaOH AR AR-HCl. Phosphate removal by alkaline residue was pH dependent process. Mechanisms for phosphate removal mainly involved adsorption and precipitation, varied with equilibrium pH of solution. For AR-HCl, the acid equilibrium pH( 6.0) was unfavorable for the formation of Ca-P precipitate, with adsorption as the key mechanism for phosphate removal. In contrast, for AR and ARNaOH, precipitation was the dominant mechanism for phosphate removal, due to the incrase on pH( 8.0) after phosphate removal. The results of both XRD and SEM analysis confirmed CaHPO4·2H2O formation after phosphate removal by AR and AR-NaOH.     

上海市环保行政审批系统的设计与实现

上海市环保局行政审批系统采用流程控制和数据传输交换技术,构建了申报系统、审批系统、业务管理系统、跟踪监控系统四部分,实现了包括建设项目环评、固废、辐射等15项行政审批和23项非行政审批事项的“一口受理、一办到底”,通过信息技术实现了外网申报、内网审批,实现了环保审批流程优化再造和审批全过程公开透明,实现了“便民审批”、“高效审批”、“阳光审批”。     

中国危险废物和医疗废物焚烧处置行业二（口恶）排放水平研究

通过调研全国危险废物和医疗废物焚烧处置设施,对包含二噁英排放水平的设施按处置对象、炉型和处理量分类,并作系统分析和研究.结果表明现有危险废物焚烧设施烟气中二噁英的浓度比医疗废物低,达标率为74.19%;危险废物选用回转窑处置效果较好,达标率为66.67%;而医疗废物选用回转窑或热解炉,要综合考虑处置规模、生产成本和二英排放总量等因素;危险废物介于10~30 t·d-1和医疗废物介于10~20 t·d-1的处置设施要尤其注意二噁英的排放问题;医疗废物焚烧飞灰中二噁英的均值浓度为危险废物6倍以上,仅有16.67%满足填埋要求.二者烟气中二英的浓度分布以1,2,3,4,6,7,8-HpCDF、2,3,7,8-TCDF和OCDD为主.     

液氮泡沫发生器内流动特性研究

低温液氮与泡沫混合液直接接触产生氮气泡沫是一种新型的掺混形式,利用液氮高汽化比的特点,搭建液氮泡沫可视化实验装置,进行氮气-水两相流及液氮泡沫流动特性的研究。结果表明,液氮相变产生大量氮气,其与泡沫液混合产生泡沫,温度有所回升,最终趋于泡沫混合液温度;管路沿程压降较小;液氮射流破碎及流动过程可分为6个区域:低温液氮区、向上循环翻滚区、滞留区、泡沫与泡沫混合液混合区、致密泡沫区、泡沫混合液区。流体向下游流动过程中持续发泡;为防止管路结冰,需合理控制泡沫混合液与液氮流量。     

Mitigating Impact of Devils Lake Flooding on the Sheyenne River Sulfate Concentration

Devils Lake is a terminal lake located in northeast North Dakota. Because of its glacial origin and accumulated salts from evaporation, the lake has a high concentration of sulfate compared to the surrounding water bodies. From 1993 to 2011, Devils Lake water levels rose by ~10 m, which flooded surrounding communities and increased the chance of an overspill to the Sheyenne River. To control the flooding, the State of North Dakota constructed two outlets to pump the lake water to the river. However, the pumped water has raised concerns about of water quality degradation and potential flooding risk of the Sheyenne River. To investigate these perceived impacts, a Soil and Water Assessment Tool (SWAT) model was developed for the Sheyenne River and it was linked to a coupled SWAT and CE‐QUAL‐W2 model that was developed for Devils Lake in a previous study. While the current outlet schedule has attempted to maintain the total river discharge within the confines of a two‐year flood (36 m³/s), our simulation from 2012 to 2018 revealed that the diversion increased the Sheyenne River sulfate concentration from an average of 125 to >750 mg/L. Furthermore, a conceptual optimization model was developed with a goal of better preserving the water quality of the Sheyenne River while effectively mitigating the flooding of Devils Lake. The optimal solution provides a “win–win” outlet management that maintains the efficiency of the outlets while reducing the Sheyenne River sulfate concentration to ≤600 mg/L.