共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
2001年11月启动的中国国家"十五"攻关重大专项"清洁能源行动"涉及17个试点示范城市,经过3年多的探索与实施,取得了明显成效.着重从污染物排放、空气质量、清洁能源消费、人均能耗和万元产值能耗等环境效益方面对清洁能源实施效果进行科学评价,为推广试点示范城市的先进经验和城市可持续发展提供依据. 相似文献
3.
4.
5.
采用生命周期评价和碳足迹研究方法,对2000-2009年中国铅行业精铅生产过程中产生的碳足迹进行核算,并对其造成的碳汇成本和铅行业的收益进行研究.结果表明:(1)2000-2009年中国铅行业碳足迹总体呈增长趋势,主要原因是中国铅产业生产技术进步较为缓慢,生产过程中的能耗下降并不明显;(2)从2005年开始,铅行业收益高于其碳汇林成本,主要原因是中国精炼铅产量和国际铅价的高速增长.基于上述分析,从抑制碳排放和保证行业总体收益两方面提出了铅行业碳足迹控制策略,引导铅行业的低碳化发展. 相似文献
6.
7.
基于目前国家建立环境污染责任保险制度的规划需求和河南省当前新发展形势需要,选择以河南省典型高污染、高风险行业(即煤化工行业)为研究对象.在对相关理论进行分析的基础上,识别影响河南省煤化工行业的环境风险因子,并确定指标的评估标准(权重及评分结果).遵照指标体系的建立原则,采用层次分析法,从内在性和外在性两方面因素构建煤化工行业环境风险等级划分指标体系,进一步将评分结果与环境风险等级比对,最终将煤化工行业的环境风险等级划分为5个等级,为河南省环境污染责任保险制度的建立奠定基础. 相似文献
8.
9.
10.
清洁生产在企业层次的推广成效显著,但也逐渐显现出其局限性,如单个企业能耗、物耗的进一步降低往往涉及工艺改造,技术风险大且成本较高,而且线性的生产模式不利于废物的循环利用等.清洁生产的意义和内涵已随着时代的需要有了进一步的延伸和扩展,将清洁生产应用于工业共生系统已成为清洁生产理论创新的重要组成部分.产业园区的建设为进一步提高资源、能源利用率创造了条件,产业生态学的发展为区域层次的清洁生产提供了理论基础.把清洁生产应用于产业园区是必要且可行性的,但产业园区的清洁生产理论和方法尚需进一步探索和实践. 相似文献
11.
The effect of simulated rain on folpet and mancozeb residues on grapes and on vine leaves 总被引:1,自引:0,他引:1
Cabras P Angioni A Garau VL Melis M Pirisi FM Cabitza F Pala M 《Journal of environmental science and health. Part. B》2001,36(5):609-618
Artificial rainfalls were used to determine the effect of the amount of the rainfall and the time interval between pesticide application and rainfall event, on folpet and mancozeb residues on grapes and vine leaves. Forty-five mm of rain were administered to the vineyard in different amounts (45; 30+15; 15+15+15 mm). Folpet showed good rainfastness on the grapes and on the leaves. A modest decrease was observed only in the experiments that had received 45 mm of rain at one go. Mancozeb showed a lower rainfastness, since a portion of the deposit was easily washed off also by a modest rainfall. The percentage of this portion was higher in the grapes (38%) than in the leaves (20%). The data obtained in these experiments show that, in the case of folpet, it is not necessary to repeat the treatment when it rains the day after, while it is recommendable to repeat it in the case of mancozeb. 相似文献
12.
Ca2+和PAM 对污泥流变性和脱水性能的影响 总被引:3,自引:0,他引:3
研究了Ca2+和聚丙烯酰胺(PAM)在污泥调理过程中对污泥流变行为和脱水性能的影响,通过对粘度、毛细吸水时间(CST)、比阻(SRF)等参数的测量,发现Ca2+单独作用时对污泥脱水性能的提高不大,而不同含量的Ca2+和PAM混合后,对污泥的流变行为和脱水性能都有不同程度的影响,发现20 mg/L的PAM连同140%DS的Ca2+对污泥共同进行调理时,体系表观粘度最低,脱水性能最好,同时经济成本也较低.研究表明,还不能肯定地得出可用体系的表观粘度作为调理剂最佳投加量的控制指标. 相似文献
13.
14.
《Atmospheric environment (Oxford, England : 1994)》2007,41(4):797-808
A new-coupled air quality numerical modeling system has been developed and applied to the study on the adjusting and controlling effect of forest cover on air quality. The modeling system is composed of Plant Canopy Layer Model (PCLM), Urban Scale Meteorological Model (USMM), and High-Resolution Chemical Model (HRCM). The system was applied to the study on the ecological adjusting and controlling effects on PM10 and O3 in Jinan City, China. The results show that the forest cover can adjust and control PM10 and O3 significantly by reducing the concentrations of PM10 while increasing the concentrations of O3 with the increase of forest cover. 相似文献
15.
以空白生料为基准,分别掺入0.5%、1.0%和2.0%的Pb试剂,分别在1 250、1 300、1 350、1 400和1 450℃烧成熟料,并利用化学分析、XRD、SEM和SEM+EDS等方法对熟料进行检测分析。结果表明,在相同Pb掺量(分别为0.5%、1.0%和2.0%)下,随煅烧温度在1 250~1 450℃的逐渐升高,烧成效果逐渐变好。较低掺量时,Pb可促使液相提前出现,增加液相量,降低液相粘度,对生料易烧性有一定程度的改善作用;掺量过高(达到2.0%时),对熟料易烧性不利。Pb易富集固溶于A矿中。 相似文献
16.
以生物表面活性剂鼠李糖脂(RL)为表面活性剂,中长碳链正构醇(正丁醇、正戊醇、正己醇、正庚醇及正辛醇)为助表面活性剂,采用滴定法制备RL/柴油/正构醇/水柴油微乳体系,并考察了表面活性剂用量(Km)、助表面活性剂醇的种类及用量(δas)及离子强度对柴油微乳体系最大增溶水量(Wo)的影响,并对不同条件下获得的柴油微乳体系的运动粘度(μ)和表面张力(γ)进行了表征。通过荧光法测得RL在柴油中的临界胶束浓度CMC为7g/L。当生物表面活性剂与柴油的质量比Km为0.02,助表面活性剂选用正庚醇且醇与表面活性剂的质量比δgs为0.1,NaOH溶液质量分数为0.06%时,柴油微乳体系的肛和T较低,形。最大,性能较佳。 相似文献
17.
C. M. Tu 《Chemosphere》1982,11(12)
Studies on the effects of 21 fungicides and five pyrethroid insecticides on growth of
, emergence and survival of alfalfa seed and the efficacy of the chemicals in control of Verticillium wilt pathogens were conducted. 相似文献
18.
Neil D. Westcott Randy A. Reichle 《Journal of environmental science and health. Part. B》2013,48(1):91-101
Abstract Residues of cypermethrin and deltamethrin in wheat herbage and grain and deltamethrin in sweetclover herbage were determined. Cypermethrin was applied at 28 g/ha to wheat and the residues on the herbage declined exponentially from 3.74 ppm immediately after spraying to 0.20 ppm 27 days after spraying. No cypermethrin residues were detected in the grain. Deltamethrin was applied at 6 g/ha to wheat and the residues on the herbage declined exponentially from 0.70 ppm immediatly after spraying to 0.05 ppm 27 days after spraying. No deltamethrin residues were detected in the grain. Deltamethrin was applied to sweetclover at 3, 4, 5, 10, and 16 g/ha. Residues on the herbage declined exponentially from 0.10, 0.16, 0.22, 0.40 and 0.70 ppm immediatly after spraying to 0.02, 0.03, 0.04, 0.15 and 0.18 ppm 5 days after spraying, respectively. 相似文献
19.