湿法脱硫系统优化分析

分析了运用烟塔合一等技术对现有湿法脱硫系统简化的可行性.在湿法脱硫系统中,利用冷却塔排烟气代替烟囱排烟,取消烟囱和GGH换热器,将增压风机和引风机合二为一,可提高能源的利用效率,减少设备的投资,降低系统运行及维护费用.     

高校环境专业实验教学存在的问题及对策

实验教学在高校环境专业教学工作中发挥着越来越重要的作用。通过对高校环境专业实验教学的现状和所存在的问题进行分析,提出了优化实验教学内容、改进实验教学方法和考核方式等改进措施,以提高高校环境专业实验教学水平。     

武汉市湖泊侵占现状分析与洪涝灾害

湖泊是集提供水源、补充地下水、调节径流、抵御洪涝灾害、改善微小气候等功能为一体的重要水域,是湿地的重要组成部分。分析武汉市湖泊侵占与洪涝灾害现状发现,武汉市湖泊侵占现状严重,面积锐减,从而影响了湖泊在防洪排涝体系中的重要作用,是造成了武汉市历年遭受特大洪涝灾害的原因之一。2016年的洪涝灾害应该进一步敲醒警钟,保护武汉市湖泊资源迫在眉睫。为政府决策部门、职能部门、科研机构保护武汉市湖泊资源提供依据。     

秦皇岛市城镇化建设中环境问题及对策探析

城镇化的快速发展使秦皇岛市在城镇化推进过程中出现了水资源匮乏、大气污染加剧、固体废弃物逐年增加等问题,其他环境安全问题也随之不断凸显。因此,提出秦皇岛市城镇化建设与环境协调发展的对策：加强水源保护;加强PM10和PM25的源头控制;加大投入,做好城市生活垃圾处理;坚持生态学发展理念。     

日常生活中“低碳生活”的几点思考

"低碳生活"是一种通过降低碳的排放减少对大气的污染,进而建立起来的发展持续型和环境友好型的全新生活方式,其核心内容是低污染、低消耗和低排放,以及多节约。"低碳生活"是低碳社会的重要组成部分。日常生活中"低碳生活"的实现途径主要是节电、节气和回收。     

以多媒体课件开发促进高职人才培养模式建设

多媒体教学在现代教学中非常普遍,以教师为主导、学生为制作主体,利用Flash、Photoshop、AutoCAD、3Dsmax等软件,按照布置任务、学生分组、制定课件框架、收集资料、筛选资料、课件制作的过程来完成多媒体课件,通过融汇多门课程的教学内容进行多媒体课件开发,既丰富了实践课教学,增强了学生对知识的理解和运用,促进了课程考试改革和课程间的融合,而且成为学生之间的交流平台,对高职人才培养模式的建设起到了积极的促进作用。     

Farmers' perception on combined climatic and market risks and their adaptive behaviors: a case in Shandong Province of China

Environment, Development and Sustainability - This paper used original survey data in Shandong province of China to depict local farmers’ perceptions of combined climatic and market risks,...     

Observation-based sources evolution of non-methane hydrocarbons (NMHCs) in a megacity of China

Both concentrations and emissions of many air pollutants have been decreasing due to implement of control measures in China, in contrast to the fact that an increase in emissions of non-methane hydrocarbons (NMHCs) has been reported. This study employed seven years continuous NMHCs measurements and the related activities data of Shanghai, a megacity in China, to explore evolution of emissions and effectiveness of air pollution control measures. The mixing ratio of NMHCs showed no statistical interannual changes, of which their compositions exhibited marked changes. This resulted in a decreasing trend of ozone formation potential by 3.8%/year (p < 0.05, the same below), which should be beneficial to ozone pollution mitigation as its production in Shanghai is in the NMHCs-limited regime. Observed alkanes, aromatics and acetylene changed by +3.7%/year, -5.9%/year and -7.4%/year, respectively, and alkenes showed no apparent trend. NMHCs sources were apportioned by a positive matrix factorization model. Accordingly, vehicular emissions (-5.9%/year) and petrochemical industry emissions (-7.1%/year) decreased significantly, but the decrease slowed down; significant reduction in solvent usage (-9.0%/year) appeared after 2010; however, emissions of natural gas (+12.6%/year) and fuel evaporation (with an increasing fraction) became more important. The inconsistency between observations and inventories was found in interannual trend and speciation as well as source contributions, emphasizing the need for further validation in NMHCs emission inventory. Our study confirms the effectiveness of measures targeting mobile and centralized emissions from industrial sources and reveals a need focusing on fugitive emissions, which provided new insights into future air policies in polluted region.     

纳米二氧化钛光催化降解造纸废水的试验研究

以廉价的无机盐四氯化钛为原料,采用溶胶-凝胶法制备出纳米TiO2粉末作为光催化剂,在高压汞灯的光源照射下对河北省某造纸厂废水进行了光催化降解.考察了TiO2光催化剂的热处理温度、用量、pH值、反应时间等因素对废水COD降解率的影响.研究表明:经460℃热处理1 h的Ti02光催化效果较好,在COD浓度300 mg/L,...     

氨吹脱-Fenton氧化预处理阿奇霉素废水的研究

采用氨吹脱-Fenton试剂氧化法对阿奇霉素废水进行预处理,考察了各种因素对处理效果的影响。实验结果表明：在pH值为11,吹脱时间160 min,温度30℃的条件下,氨氮浓度从2 458.7 mg/L降低到421.7 mg/L,去除率可达82.85%;Fenton氧化吹脱出水的适宜工艺条件：初始pH值为3、反应时间90 min、FeSO₄·7H₂O投加量为0.01 mol/L、H₂O₂/Fe²⁺的投加比16∶1,此时,COD去除率为72.6%;废水经预处理后,有效地改善了废水水质,提高了废水的可生化性,由初始的0.1增至0.37,为后续废水的生化处理提供了有利条件。