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排序方式: 共有153条查询结果,搜索用时 499 毫秒
101.
三点比较式臭袋法测定环境中臭气浓度   总被引:6,自引:0,他引:6  
就三点比较式臭袋法在测定环境空气臭气浓度时应注意的现场踏勘、采样点的选择、采样次数、配气、嗅辨过程,以及臭气浓度计算等问题进行探讨,使该方法更加完善、简便.  相似文献   
102.
The principles of precaution and sustainability require more consideration in the assessment of environmental risks posed by chemicals and genetically modified organisms. Instead of applying risk reduction measures when there are serious indications for damage, full scientific certainty is often waited for before taking action. The precautionary principle particularly should be applied in those cases in which the extent and probability of damage are uncertain, e.g. in the case of persistent chemicals which are additionally bioaccumulative or highly mobile. Based on these principles, environmental action targets for risks associated with GMOs and chemicals can be developed. Risk management not only includes statutory measures but also instruments designed to influence behaviour indirectly are important to achieve the goals. Particularly for risks of GMOs which provoke fear, risk communication is important. Some rules to which attention should be paid in communication with the public are presented.  相似文献   
103.
碱渣处理装置的现状与展望   总被引:4,自引:0,他引:4  
碱渣处理一直是困扰炼厂环境保护的一大难题。碱渣处理装置成为炼厂的主要恶臭污染源,亟需处理。为此,我们通过国内外技术交流,在文献调研基础上,提出了碱渣空气氧化预处理脱臭治理方案。该工艺成熟、简单、可靠,已用于国外一些炼厂,并可大大改善大气污染,提高回收副产品的质量。  相似文献   
104.
本文介绍东南沿海火山岩区新—轮地质找矿科研工作阶段性成果一基本查明下扬子亚板块和华夏亚板块基底杂岩的差异、基底性质和成因以及地壳生长过程;总结了政和一大埔断裂带变形变质特征及其演化模式;分析并类比了主要构造—成矿区(带)控制区域成矿的地质条件.并以实际资料为依据提出了一批效矿靶区;新编了1:100万东南沿海地质图:建立了适合于储存中、大型矿床以及矿点地质信息的数据库.  相似文献   
105.
微生物过滤法净化恶臭污染物   总被引:9,自引:0,他引:9  
翟崇治 《重庆环境科学》2000,22(3):35-36,39
分析了处理恶臭污染物的吸附法、化学吸收法、催化燃烧法、生物处理法等优缺点 ,并介绍了微生物过滤器法净化恶臭物质的过程及工艺实例。  相似文献   
106.
生物过滤法处理含氨废气研究   总被引:15,自引:1,他引:15  
研究了生物过滤法处理含氨废气的技术,实验中考察了气体的停留时间、进气方式、进气中氨浓度等因素对氨法除率的影响,当进气中氨的浓度分别为15.2、75.9和15.20mg(NH3)/m^3时,生物过滤反应器对氨的去除均在95%以上,反应时间是32s,处理后的气体中氨的浓度可以达到国家一级排放标准,对填料中各形态氮浓度的分析证明氨在反应器中的转化以硝化反应为主。  相似文献   
107.
The Finnish approach that is starting from the basic human needs of food, housing, mobility and related lifestyles enables us to address the social dimension of sustainable development alongside the ecological and economic dimensions. In this context environmental problems cannot be resolved in isolation from people’s everyday lives, as can happen if environmental policies are based purely on emissions.But it is also worth questioning the potential for national SCP programmes in today’s global markets. Over the last ten years, domestic material flows within the Finnish economy have remained fairly constant, with gains in material efficiency cancelled out by increasing levels of material consumption. However, external material flows and the consequent environmental impacts have steadily increased, and the magnitude and environmental impacts of both imports and exports are approximately the same as for domestic flows. This means that the role of external material flows can no longer be ignored in national SCP policies.It is also important to integrate SCP with climate policies. Finland’s national climate and energy strategy is mainly based on the need to reduce CO2 emissions from energy production and industrial installations, but there is also a need for complementary actions to reduce the carbon footprints caused by private and public consumption.  相似文献   
108.
江西九瑞地区铜多金属矿整装勘查区为全国47个整装勘查区之一,是我国重要的铜金铅锌矿集区。通过对成矿地质条件分析和最新地质找矿成果研究,本文总结了区内成矿规律、北西向构造、燕山期花岗闪长斑岩等为区内铜金多金属矿成矿重要条件,同时认为北东东向构造-岩浆岩带为重要的成矿远景区,并优选出城门山矿区及外围、宋家湾-武山矿区及外围、彭山地区、邓家山-通江岭、宝山-大桥地区、大浪-洋鸡山丁家山等铜金铅锌矿找矿靶区。  相似文献   
109.
程炜  陈丽娜  王向华 《环境科技》2009,22(2):51-54,57
分析了江苏省环境质量现状及变化趋势,探讨了江苏省“十一五”期间环境保护规划指标实现的主要影响因素.并从环境现状、趋势及相应对策措施角度分析了指标的可达性。分析结果表明,到2010年底,要全面实现江苏省的“十一五”环境保护规划指标任务非常艰巨.尤其是可吸入颗粒物指标和太湖流域水质的改善指标。  相似文献   
110.
A two-stage BTF system was established treating odorous off-gas mixture from a WWTP. The two-stage BTF system showed resistance for the lifting load of H2S and VOSC. Miseq Illumina sequencing showed separated functional microbial community in BTFs. Avoiding H2S inhibition and enhancement of VOSC degradation was achieved. Key control point was discussed to help industrial application of the system. Simultaneous removal of hydrogen sulfide (H2S) and volatile organic sulfur compounds (VOSCs) in off-gas mixture from a wastewater treatment plant (WWTP) is difficult due to the occasional inhibitory effects of H2S on VOSC degradation. In this study, a two-stage bio-trickling filter (BTF) system was developed to treat off-gas mixture from a real WWTP facility. At an empty bed retention time of 40 s, removal efficiencies of H2S, methanethiol, dimethyl sulfide, and dimethyl disulfide were 90.1, 88.4, 85.8, and 61.8%, respectively. Furthermore, the effect of lifting load shock on system performance was investigated and results indicated that removal of both H2S and VOSCs was slightly affected. Illumina Miseq sequencing revealed that the microbial community of first-stage BTF contained high abundance of H2S-affinity genera including Acidithiobacillus (51.43%), Metallibacterium (25.35%), and Thionomas (8.08%). Analysis of mechanism demonstrated that first stage of BTF removed 86.1% of H2S, mitigating the suppression on VOSC degradation in second stage of BTF. Overall, the two-stage BTF system, an innovative bioprocess, can simultaneously remove H2S and VOSC.  相似文献   
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