循环流化床锅炉环保技术

介绍了CFB锅炉脱硫、除尘、降低NOx排放的技术特点与效率。     

PRE-ESTIMATE FOR THE CHANGE OF CLIMATIC VULNERABILITY TO AGRICULTURAL PRODUCTION IN LOESS PLATEAU,CHINA

Inrecentyears ,inthebackgroundofstrongglobalenvironmentalchange ,naturalvariationhastheaggravatingtendencyyearbyyearinChina .Additionally ,Chinahasahigheconomicgrowthrateandagreatpopulation ;humanactivitiesinhighriskareas (likeLoessPlateau)areexacerbated ;andbearingcapabilityagainstthedisasterisgenerallyvulnerable .Becauseofthosefactorsabove ,theeconomiclossescausedbythedisastershavebeenincreasing .Therefore ,ithasbecomethescientificbasisofestablishingaregionalsustainabledevelopmenttoprobein…     

一次大范围持续性灰霾天气的形成机理分析研究

针对一次持续性灰霾天气,以处于核心污染区域的江苏省镇江市的空气污染状况为研究对象,对大气污染整体水平、各污染物的浓度状况及其相关性的分析,并结合气象参数中的风速、相对湿度、大气能见度,初步揭示此次镇江市持续性灰霾产生的主要原因是城市中汽车尾气的大量排放和持续性静稳气象条件的存在,指出当污染物排放总量超过了区域环境容量时,在适当气象条件下就会形成灰霾天气。     

6种重金属对3种海水养殖生物的急性毒性效应

以主要海水养殖动物菲律宾蛤仔、刺参、褐牙鲆为研究对象,采用静水毒性法评价了重金属对海洋生物的毒性效应,分别将受试动物暴露于不同浓度梯度的重金属Cd、Cr、Cu、Zn、Hg及As单种试液中,概率单位法求得半致死质量浓度。结果表明,同一种重金属对3种不同养殖生物的毒性存在明显差异(P0.05),Hg对菲律宾蛤仔、刺参及褐牙鲆3种养殖生物的96 hLC50分别为0.134 mg·L~(-1)、0.0246 mg·L~(-1)及0.238 mg·L~(-1);Cu为0.323 mg·L~(-1)、0.0499 mg·L~(-1)及0.975 mg·L~(-1);As为2.464 mg·L~(-1)、0.301 mg·L~(-1)及8.345 mg·L~(-1);Cd为2.843 mg·L~(-1)、1.111 mg·L~(-1)及6.787 mg·L~(-1);Zn为30.246 mg·L~(-1)、0.449 mg·L~(-1)及17.114 mg·L~(-1);Cr为32.591 mg·L~(-1)、2.205 mg·L~(-1)及95.137 mg·L~(-1)。6种重金属对菲律宾蛤仔毒性强弱:HgCuAsCdZnCr;对刺参毒性:HgCuAsZnCdCr;对褐牙鲆毒性:HgCuCdAsZnCr。综合结果表明:Hg、Cu毒性最强,Cd、As及Zn次之,Cr毒性最弱。研究结果可为海水增养殖区重金属风险评价提供理论依据。     

原花青素对镉引起的鸡胚睾丸氧化损伤的缓解作用

为探索原花青素对镉引起的鸡胚睾丸氧化损伤的缓解作用,本实验设置了对照组、镉、葡萄籽提取物原花青素(grape seed proanthocyanidin extract,GSPE)和镉+GSPE组,在胚胎期第6.5天(E6.5)注射0.05 mg·kg-1镉或2.5 mg·kg-1GSPE,统计孵化率和睾丸指数,并在E17.5检测睾丸形态、氧化指标、细胞凋亡和内质网应激相关基因的表达情况。结果表明:与对照组相比,镉处理组孵化率和睾丸指数均显著降低;睾丸组织结构出现了细胞核固缩、空泡化和染色质周缘化等变化,过氧化氢和丙二醛水平升高、超氧化物歧化酶活性显著降低、谷胱甘肽含量明显减少,凋亡细胞显著增多;睾丸中抗凋亡基因Bcl-2 mRNA表达水平下降,同时促凋亡基因Caspase3和内质网应激相关基因(XBP-1和HO-1)mRNA表达水平显著上升。然而,GSPE联合处理,明显缓解了镉引起的睾丸损伤,使孵化率和睾丸指数回升,抗氧化水平和内质网应激得到改善,凋亡细胞显著减少,睾丸形态趋于正常。结果表明:GSPE可通过其抗氧化作用降低XBP-1相关的内质网应激基因的表达,从而缓解镉引起的鸡胚睾丸生殖毒性。     

Identifying watershed-scale spatiotemporal groundwater and surface water mixing function in the Yiluo River,Middle of China

Environmental Science and Pollution Research - Researching the watershed-scale spatiotemporal groundwater and surface water mixing function, groundwater recharge heights and age can provide...     

Seasonal variations of water quality response to land use metrics at multi-spatial scales in the Yangtze River basin

Environmental Science and Pollution Research - Land use pattern is increasingly regarded as an important determinant of environmental quality and regional ecosystems. Understanding the correlation...     

我国政府购买环境公共服务的监督机制研究

近年来,环境类服务购买在政府购买公共服务中的比重不断增多,作为政府购买公共服务的下属概念,其监督不仅存在政府购买公共服务监督的一般性问题,还存在环境领域的专门问题,概括后主要表现为监督主体缺位、被监督对象比例设置不科学、监督内容过于宽泛、监督制度构建有限等。推动全国性专门立法、定位不同监督主体的功能、明确以"合同"为核心的监督内容、拓展配套制度是完善我国政府购买环境公共服务监督机制的必由之路。     

The evolution of CO<Subscript>2</Subscript> emissions in international trade for major economies: a perspective from the global supply chain

Employing global multi-regional input–output models, this paper revisits the carbon dioxide (CO₂) emission trade (including exports and imports) and assesses their positions in the national emissions of 14 major countries with large national emissions or large emission trades during 1995–2009. It especially explores the evolution of the emission trades of these countries from both continuous time series and comparative perspectives, in order to provide an explanation for CO₂ emission spillovers across countries. The main findings obtained were as follows: (1) China was the largest CO₂ exporter to other countries, accounting for over 20 % of global exports since 2005; the CO₂ exports of the United States of America (USA), Germany, and Japan varied slightly over this time period, but overall, their proportions had decreased. (2) The CO₂ imports of the USA were the largest, occupying around 20 % of the global CO₂ imports; meanwhile, China’s CO₂ imports increased rapidly and ranked the second largest. (3) For Chinese Taiwan, its proportion of CO₂ exports in production-based emissions ranked the highest while that of the USA ranked the lowest; highly CO₂ import-dependent countries with an over 40 % proportion of CO₂ imports in its consumption-based emissions included France, Germany, Italy, and Spain, while China, India, and Russia remained the lowest, distinguished from their physical energy imports. These results suggested that the global policy makers should take the CO₂ emissions in trade into consideration when carefully accounting for national emissions inventories.     

西北地区农村生活污水处理技术研究

西北地区农村生活污水处理工作是中国环境保护工作的重要组成部分.针对西北地区农村生活污水处理目前没有专门设计的处理工艺,结合西北地区农村污水处理的实际特点,在对比分析了几种常用农村生活污水处理工艺特点及适用范围基础上,选择了四套家用型污水处理技术,为建立西北农村生活污水处理新模式提供借鉴与科技支撑,为西北地区农业面源污染的控制提供技术支持.