安徽省水质自动监测站点位优化方法研究

文章分析了安徽省现有水质自动监测站布设情况和国内外相关研究情况,指出了现有水质自动监测站建设的不足之处,明确了水环境质量预警和水质断面目标考核两个优化布设目标。就水质自动监测站点位优化的筛选方法进行研究与讨论,提出“理论筛选一现场调研一综合打分”三步走策略,在此基础上提出了水质自动监测站布点三级指标体系。并采用德尔斐法确定权重,建立了合理性综合指数评价体系细则,为环境管理提供了参考。     

城乡结合部生态文明建设存在的问题、原因及对策研究

随着城镇化进程的加快,城乡结合部已经成为城市扩展和蔓延的前沿地带。城乡结合部生态文明建设面临的资源配置不合理、管理缺位而导致的“脏乱差挤”、生态系统脆弱、法律法规不健全、居民生态文明意识淡薄等问题El益突出,从居民生态意识、管理体制、基础设施、经济增长与环境保护的关系、法制管理等方面分析了存在这些问题的原因,从而提出树立生态文明意识、加大投入,强化基础设施建设、发展循环经济,走可持续发展道路、完善管理体制,明确职责范围、加强生态文明法制建设,提高生态文明监管能力等对策建议。     

黄骅港三期筒仓防煤体高温对策研究

黄骅港三期是单个容量3万吨共24座筒仓的超大型群仓储煤系统,储煤主要来自神华集团所属煤矿,少部分为外购协作煤,多属易自燃煤种。为更有效控制火灾隐患,通过工艺流程分析及危险因素提取,试运营期间数据分析等,研究了致使煤体高温的危险因素和对策。发现运输过程中出现因雨淋而产生润湿热,因粉尘积聚发热的危险;筒仓储煤曾出现数天内温度从10℃升高到45℃,筒仓内有毒有害气体可能超限的危险;输煤皮带可能跑偏引起摩擦生热的危险等。试运营期间针对性采取了喷洒抑尘剂,设置警报系统及检测装置,加强皮带机监控和管理等安全措施。     

The presence of Genogroup II Norovirus in Retail Shellfish from Seven Coastal Cities in China

Noroviruses (NoVs) are commonly occurring pathogens that cause gastroenteritis. Outbreaks of viral diseases have often been ascribed to the consumption of contaminated shellfish. Our objective was to evaluate the presence and contamination levels of NoV in shellfish sold at seafood markets in China. We tested 840 shellfish samples (Crassostrea gigas, Mytilus edulis, Azumapecten farreri, SinoNoVacula constricta, Scapharca subcrenata, Ruditapes philippinarum) that were collected from seven cities around the Yellow and Bohai Seas in China between December 2009 and November 2011. We used real-time RT-PCR to detect NoV in purified concentrates from the stomach and digestive diverticula of these shellfish. NoV was detected in 19.35 % (N = 155), 16.67 % (N = 114), 5.70 % (N = 158), 8.82 % (N = 136), 13.74 % (N = 131), and 16.44 % (N = 146) of oyster, mussel, scallop, razor clam, ark shell, and clam samples, respectively. The average detection rate was 13.33 % (112/840). Nucleotide sequencing of the NoV RT-PCR products demonstrated that all strains belonged to NoV genotype GII.12, except two that belonged to GI.3. More than 10² copies of the NoV genome were detected in 69 of 112 positive shellfish samples. Our results suggest that ~13 % of shellfish harbor NoV, and GII.12 NoV is the primary strain in shellfish purchased at markets in seven coastal cities in China.     

Determining reference conditions for TN, TP, SD and Chl-a in eastern plain ecoregion lakes, China

Establishing the nutrient reference condition(baseline environmental condition) of lakes in an ecoregion is a critical consideration in the development of scientifically defensible aquatic nutrient criteria.Three methods were applied to determine reference conditions in the Eastern plain ecoregion lakes with respect to total phosphorus(TP),total nitrogen(TN),planktonic chlorophyll a(Chl-a) and Secchi depth(SD).The reference condition value for the lakes in the Eastern plain ecoregion by the trisection method is TP of 0.029 mg/L,TN of 0.67 mg/L,Chl-a of 3.92 mg/m 3,SD of 0.85 m,and the reference condition range by the lake population distribution approach is TP of 0.014-0.043 mg/L,TN of 0.360-0.785 mg/L,Chl-a of 1.78-4.73 mg/m 3,SD of 0.68-1.21 m.Additionally,empirical models were developed for estimating the reference Chl-a concentration and SD successfully for lakes in the Eastern plain ecoregion.Overall,the data suggest that multiple methods can be used to determine reference conditions and that in Eastern plain ecoregion lakes the reference condition corresponds to a mesotrophic status.     

计量经济模型在我国环境问题研究中的应用评述

通过梳理已有文献,从空间分布、指标选取、主要方法应用频率、数据预处理及结果对比等方面对计量经济模型在我国环境问题研究中的应用现状与不足进行评述,同时提出相应的建议,以期为相关的拓展研究提供参考。     

不同香蒲种植密度对模拟污水的净化试验研究

在不同种植密度处理下,研究香蒲净化污染水体的去除效果。结果表明：种植密度和处理效果成正比,密度为27株/㎡时,净化效果最好,氨氮、TP、TN的去除率分别为94．81％、77．42％、82．84％。     

Another outlook to sector-level energy consumption in Pakistan from dominant energy sources and correlation with economic growth

Environmental Science and Pollution Research - The present study seeks to investigate the sector-level energy consumption of oil and natural gas and to explore the linkage between economic growth,...     

Analyzing the determinants of clean energy consumption in a sustainability strategy: evidence from EU-28 countries

Environmental Science and Pollution Research - The current global spirit for sustainable development has led to increased attention to reducing the use of conventional energy sources and managing...     

Simultaneous carbon and nitrogen removal by anaerobic ammonium oxidation and denitrification under different operating strategies

Environmental Science and Pollution Research - Real domestic wastewater was treated initially in a sequencing batch reactor (SBR), with partial nitrification achieved before the effluent was used...