纳米级聚合氯化铝处理石化废水絮凝效果研究

采用自制的纳米级聚合氯化铝絮凝荆处理石大科技股份公司胜华炼油厂隔油池出水,以处理后水样的透光率作为混凝沉降效果的评价指标,并对絮凝剂投加量、搅拌速度、搅拌时间等影响混凝效果的因素进行了研究。试验表明,聚合氯化铝对石化废水的处理达到较为理想的效果,聚合氯化铝混凝处理石化废水的最佳条件为：纳米级聚合氯化铝投加量为15mg／L左右,慢速搅拌的搅拌速度为50～60rpm,快速搅拌的搅拌速度为190—225rpm,快速搅拌时间90s。慢速搅时间10min时效果最佳。使用Al-Ferron逐时络合比色法及XRD对絮凝荆进行了表征,结果证实样品中Alb含量可达到85％左右。     

哈尔滨市生态城市指标体系的构建与评价

随着城市化进程的不断加速和人们生态意识的加强,生态城市已经成为现代城市发展建设的主要模式和方向,生态城市应当是哈尔滨市发展的理想模式.根据哈尔滨市的实际,依据建立生态城市指标体系的原则和方法从资源、环境、经济以及社会4个方面构建生态城市指标体系,在运用层次分析法的基础上对结果进行综合评价.     

大型中心传动浓缩（刮泥）机的应用与发展

阐述了大型中心传动浓缩机与周边传动浓缩机的结构特点及国内外的应用现状,分析了周边传动浓缩机存在的结构性缺陷,介绍了中心传动浓缩机的分类、技术特点以及其在国内的推广应用前景。     

Perfluorosulfonates and perfluorocarboxylates in snow and rain in Dalian,China

Samples of precipitation events (snow and rain) in Dalian, a typical coastal town in China, were analyzed for perfluorosulfonates (PFSAs) and perfluorocarboxylates (PFCAs) to investigate atmospheric contamination by these compounds. In the snow event on December 16, 2006, samples were collected from 21 different sites and in another 6 precipitation events, samples were collected from a single location. Four PFSAs (C4, C6, C8, C10) and seven PFCAs (C6–12) were analyzed. Among the homologues, perfluorooctane sulfonate (PFOS) concentrations were the highest with a geometric mean (GM) of 145 ng/L (n = 21) during the snow event on December 16, 2006, followed by perfluorooctanoate (PFOA) with a GM of 24.7 ng/L (n = 21). Concentrations of perfluorobutane sulfonate (PFBS), perfluorohexane sulfonate (PFHxS) and perfluoroheptanoate (PFHpA) were more than two orders of magnitude lower than that of PFOS. Other PFSAs and PFCAs were found to be below the limit of detection in all the samples. In other 6 precipitation events, PFSAs and PFCAs were detected approximately in the same order of magnitude in both snow and rain. The results indicate that wet deposition may be a potential transport mechanism of perfluorinated chemicals in the environment.     

江苏省沿江开发区空间分工、制造业集聚与转移

基于新经济地理学相关理论,针对江苏省沿江开发战略实施以后,制造业空间可能存在的变动,在整理和分析调查问卷资料的基础上,选择专业化指数和基尼系数2种方法来定量分析江苏省21个沿江省级以上开发区空间分工、制造业集聚和转移态势。结果表明：（1）2002~2006年江南沿江开发区通过向江北沿江开发区转移部分传统产业,逐渐形成了江南沿江技术/资本密集型制造业“中心”和江北沿江劳动密集型制造业“外围”的空间分工格局;（2）江南沿江开发区内部、江北沿江开发区内部尚未形成良好的分工关系;（3）受开发区发展阶段、区域产业政策、本地化资源供给和市场需求等因素影响,并未发现理论预期的普遍存在的产业集聚现象,仅纺织服装、石化、电力、塑料橡胶等产业呈现集中趋势.     

过江通道建设对相对落后地区发展的影响——以江苏省南通市为例

苏通大桥及沪崇苏通道的建设将引致区域交通格局的演化,从而对相关地区经济社会发展产生深远影响。对于相对落后的南通市而言,快速过江通道建设既是促进发展的良好机遇,同时也将带来新的挑战和威胁：（1）交通可达性改善明显,南向联系趋于便捷,运输成本相应减小,要素集聚呈现加速态势,但优质要素面临流失威胁;（2）产业规模迅速扩张,但以低层次产业为主,进一步加大了产业层次提升的压力,同时建设用地的盲目扩张和散乱布局,使得空间开发无序风险加剧;（3）进入上海都市圈的紧密圈层,有望成为长江三角洲北翼重要的次中心城市,但面临的竞争压力也不断增大。为促进南通市的可持续发展,政府部门应在推进都市区建设、促进要素集聚、空间资源的合理和统筹利用等方面制定科学有效的区域政策。     

Research on the Industrial Symbiosis Supporting System of Eco-industrial Park

The establishment and development of the industrial symbiosis of eco-industrial park are affected by several factors. Based on the formed industrial symbiosis supporting system chart, this article analyzes the microcosmic supporting system and macroscopic supporting system. In the microcosmic supporting system, it elaborates five aspects including key enterprises, service intermediaries in the park, symbiotic enterprises, competitors and the public in detail. Then it describes the macroscopic supporting system from four aspects of governmental participation, technological innovation, educational promotion and cultural support. Finally, combining with the current construction status of the ecoindustrial park in China, it proposes the countermeasures and suggestions to build the supporting system for the eco-industrial park and provides theoretical support for the faster and better construction of the eco-industrial park in China.     

基于光合色素的化学分类法在淡水藻类研究中的应用

采用反相高效液相色谱技术(RP HPLC)系统研究了我国主要淡水藻类--蓝藻、绿藻、硅藻、甲藻、金藻、裸藻和隐藻等的光合色素,在8种纯培养藻类中共确定类胡萝卜素、叶绿素及其衍生物19种。分离到的主要标志性色素按洗脱时间分别为脱植基叶绿素a、19′ 丁酰氧岩藻黄素、叶绿素c、脱镁叶绿素a、多甲藻素、甲基脱植基叶绿素a、岩藻黄素、新黄质、紫黄质、蓝藻叶黄素、硅甲藻黄素、硅藻黄质、叶黄素、玉米黄素、叶绿素b异构体、叶绿素b、叶绿素a异构体、叶绿素a和β 胡萝卜素;其中在纯培养的铜绿微囊藻中首次鉴定到19′ 丁酰氧岩藻黄素;通过官桥基地的实际监测,证实了该技术应用的可行性,为基于HPLC分析技术的浮游植物化学分类法提供了理论依据。     

提高高校档案利用的新途径

针对目前高校档案利用率不高的实际情况,为有效地提高档案利用率,充分发挥高校档案在高校发展建设、科学管理、提升教育教学水平中的作用,笔者通过多年的探索实践,提出了加大宣传力度、搞好基础建设、提高人员素质、拓展服务方式、创新服务内容等高校档案利用的新途径,与从事高校档案工作的广大同仁商榷。     

Aging and compressibility of municipal solid wastes

The expansion of a municipal solid waste (MSW) landfill requires the ability to predict settlement behavior of the existing landfill. The practice of using a single compressibility value when performing a settlement analysis may lead to inaccurate predictions. This paper gives consideration to changes in the mechanical compressibility of MSW as a function of the fill age of MSW as well as the embedding depth of MSW. Borehole samples representative of various fill ages were obtained from five boreholes drilled to the bottom of the Qizhishan landfill in Suzhou, China. Thirty-one borehole samples were used to perform confined compression tests. Waste composition and volume-mass properties (i.e., unit weight, void ratio, and water content) were measured on all the samples. The test results showed that the compressible components of the MSW (i.e., organics, plastics, paper, wood and textiles) decreased with an increase in the fill age. The in situ void ratio of the MSW was shown to decrease with depth into the landfill. The compression index, Cc, was observed to decrease from 1.0 to 0.3 with depth into the landfill. Settlement analyses were performed on the existing landfill, demonstrating that the variation of MSW compressibility with fill age or depth should be taken into account in the settlement prediction.