砒霜生产化工厂危险废物处置工程设计

通过对砒霜生产化工厂原场址废渣及污染场地调查的基础上,进行了处置方案比选及技术经济比较,确定了就地安全填埋的处置方案。根据区域性危险废物集中安全填埋场的设计经验,本工程采用先进的HDPE双层防渗的安全填埋方式,并设置了雨水分流系统、渗滤液收集系统、封场处理和填埋气体导排系统,整个场区布置合理,对周围环境的影响小,投资少,取得了良好的社会效益和环境效益,并对危险废物处理处置工程设计中应注意的问题提出了建议。     

聚硅酸锌铝的制备及其性能研究

以硅酸钠、硫酸锌、硫酸铝为原料,通过共聚法制备了无机高分子絮凝剂聚硅酸锌铝（PSZAS）,研究了Na₂SiO₃的摩尔浓度、活化时间、Al/Si、Zn/Si 配比及絮凝剂的投加量对絮凝效果的影响,用X-射线衍射（XRD）和电子扫描电镜（SEM）对该絮凝剂的结构及形貌进行了表征。结果表明：当硅酸钠的浓度为0.4 mol/L,硅酸活化时间为2 h,Si∶Al∶Zn=1∶1∶1.5,絮凝剂投加量为20 mL/L废水时,絮凝剂的电中和能力和吸附架桥能力最强,絮凝剂对含H-酸染料模拟废水的絮凝效果最好。     

新型转式垃圾焚烧过程中脱氯脱硫机理的研究

为了探讨有机垃圾焚烧过程钙基添加剂对HCl,SO_x生成特性的影响,分别在自行设计的中空水冷转式垃圾焚烧炉和固定床加热炉中进行了一系列的实验,研究结果表明新型转式焚烧炉具有强化传热传质特性,能提高HCl、SO_x的脱除率,可抑制有害气体的生成;同时也研究了 HCl,SO₂气体同时存在时,钙基添加剂对脱氯脱硫效率的影响规律。     

基于工业以太网的烟粉尘在线监测系统的研究

为实现工厂矿山的烟粉尘浓度的实时在线监测,提出了在废气排放监测装置中引入工业以太网技术。以嵌入式S3C2410芯片为核心,扩展相应的外围电路,实现对废气中烟粉尘浓度等参数监测功能,集显示、信息处理、监测和通讯等功能于一体。文章给出了烟粉尘浓度的采样原理和系统的软硬件设计方案,详细给出了以太网控制芯片CS8900A与ARM硬件接口方法与软件实现方案。     

Hydrogeochemical Indicators of Groundwater Flow Systems in the Yangwu River Alluvial Fan,Xinzhou Basin,Shanxi, China

Based on analysis of groundwater hydrochemical and isotopic indicators, this article aims to identify the groundwater flow systems in the Yangwu River alluvial fan, in the Xinzhou Basin, China. Groundwater δ²H and δ¹⁸O values indicate that the origin of groundwater is mainly from precipitation, with local evaporative influence. d-excess values lower than 10% in most groundwaters suggest a cold climate during recharge in the area. Major ion chemistry, including rCa/rMg and rNa/rCl ratios, show that groundwater salinization is probably dominated by water–rock interaction (e.g., silicate mineral weathering, dissolution of calcite and dolomite and cation exchange) in the Yangwu River alluvial fan, and locally by intensive evapotranspiration in the Hutuo River valley. Cl and Sr concentrations follow an increasing trend in shallow groundwater affected by evaporation, and a decreasing trend in deep groundwater. ⁸⁷Sr/⁸⁶Sr ratios reflect the variety of lithologies encountered during throughflow. The groundwater flow systems (GFS) of the Yangwu River alluvial fan include local and intermediate flow systems. Hydrogeochemical modeling results, simulated using PHREEQC, reveal water–rock interaction processes along different flow paths. This modeling method is more effective for characterizing flow paths in the intermediate system than in the local system. Artificial exploitation on groundwater in the alluvial fan enhances mixing between different groundwater flow systems.     

“5·12”汶川地震灾区典型区域生态环境状况影响评价

“5·12”汶川特大地震发生后。带来的植被破坏、水土流失、次生地质灾害等,给灾区生态环境造成了极大的影响。本文重点以汶川县作为典型区域,运用“3S”技术,通过对汶川县震前、震后的生态环境状况及其变化情况进行定量评价。分析“5·12”大地震对龙门山区生态环境的影响,以期为区域灾后重建提供参考。     

美国对石油天然气勘探开发中废物的环境监管

石油天然气勘探开发及生产过程中会产生大量的废物,对这些废物的管理目前受到各国高度的重视。文章介绍了美国石油和天然气勘探开发中废物的监管机构、监管要求和管理实践,以期对我国油气行业勘探开发废物的环境监管有所启示。     

基于物元分析法基础设施系统可持续性评价

基础设施应具有持续有效地提供满足城市经济社会生态发展的整体功能,对其可持续水平的评价是城市基础设施系统研究的重要方面.应用物元分析方法建立基础设施系统可持续评价物元模型,通过分析基础设施宏观可持续的内涵,基于压力-状态-响应概念模型构建其评价指标体系,将可持续标准、评价指标及其评价值作为物元,对评价标准及实测数据进行归一化后,得到模型的经典域、节域、权系数及关联度.以某城市基础设施为例进行可持续发展水平多指标的综合评价,说明该评价方法的有效性和可行性.基于物元分析法基础设施可持续水平的科学评价,为基础设施规划建设、运营维护和更新改造决策提供科学依据.     

Octanol–air partition coefficients of polybrominated biphenyls

The octanol–air partition coefficients (K_OA) for PBB15, PBB26, PBB31, PBB49, PBB103 and PBB153 were determined as a function of temperature using a gas chromatographic retention time technique with 1,1,1-trichloro-2,2-bis (4-chlorophenyl) ethane (p,p′-DDT) as a reference substance. The internal energies of phase change from octanol to air (Δ_OAU) were calculated for the six compounds and were in the range from 74 to 116 kJ mol⁻¹. Simple regression equations of log K_OA versus relative retention times (RRTs) on gas chromatography (GC), and log K_OA versus molecular connectivity indexes (MCI) were obtained, for which the correlation coefficients (r²) were greater than 0.985 at 283.15 K and 298.15 K. Thus the K_OA values of the remaining PBBs can be predicted by using their RRTs and MCI according to these relationships.     

以人为本 开创高校工会工作新局面

认真落实科学发展观,以科学发展观统领工会工作,必须体现在党对工会工作的要求上,体现在准确全面履行好工会的职责上,从而充分发挥工会在支持改革开放、促进经济发展、推动社会进步中的积极作用。