全文获取类型
收费全文 | 44篇 |
免费 | 0篇 |
国内免费 | 13篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 3篇 |
环保管理 | 8篇 |
综合类 | 34篇 |
基础理论 | 1篇 |
污染及防治 | 8篇 |
评价与监测 | 1篇 |
出版年
2023年 | 2篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 2篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 3篇 |
2013年 | 3篇 |
2012年 | 3篇 |
2011年 | 5篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2005年 | 3篇 |
2003年 | 2篇 |
2002年 | 5篇 |
2001年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 2篇 |
排序方式: 共有57条查询结果,搜索用时 328 毫秒
51.
针对H2S污染的严峻形势,构建了包括催化再生装置和生物滴滤器的生物催化氧化装置,进行了装置的填料选择研究.经对比试验得出填料脱硫性能的优劣顺序为:沸石>焦炭>多面空心塑料小球.在温度为30 ℃、进气量为0.25 m3/h、进气H2S为2 000 mg/m3、喷淋量为1 000 mL/h、喷淋液的pH为1.97、Fe3 为0.05 mol/L的条件下,装填沸石的生物催化氧化装置的出气H2S浓度足以达到<恶臭污染物排放标准>(GB 14554-93)规定的一级厂界标准值.试验证明,生物催化氧化法是有效的新型脱除H2S技术,具有良好的经济、社会及环境效益,应进一步开展中试研究. 相似文献
52.
Nitrogen oxides(NO_x:NO,NO_2)are a concern due to their adverse health effects.Diesel engine transport sector is the major emitter of NO_x.The regulations have been strengthened and to comply with them,one of the two methods commonly used is the selective catalytic reduction of NO_xby NH_3(NH_3-SCR),NH_3being supplied by the in-situ hydrolysis of urea.Efficiency and durability of the catalyst for this process are highly required.Durability is evaluated by hydrothermal treatment of the catalysts at temperature above 800°C.In this study,very active catalysts for the NH_3-SCR of NO_xwere prepared by using a silicoaluminophosphate commercial zeolite as copper host structure.Characterizations by X-ray diffraction(XRD),scanning electron microscopy(SEM)and temperature programmed desorption of ammonia(NH_3-TPD)showed that this commercial zeolite was hydrothermally stable up to 850°C and,was able to retain some structural properties up to950°C.After hydrothermal treatment at 850°C,the NO_xreduction efficiency into NH_3-SCR depends on the copper content.The catalyst with a copper content of 1.25 wt.%was the most active.The difference in activity was much more important when using NO than the fast NO/NO_2reaction mixture. 相似文献
53.
54.
55.
纳米TiO2/沸石/UV催化臭氧化水中硝基苯的研究 总被引:1,自引:0,他引:1
设计了O3/纳米TiO2/沸石(体系A)和O3/纳米TiO2/沸石/UV(体系B)2种催化臭氧化体系并将其用于处理水中的硝基苯,研究了影响处理效果的主要因素,并对2种方法进行了比较。结果表明,2种催化臭氧化体系都能产生大量的羟自由基,加速硝基苯的降解,其中体系B对硝基苯的降解效果最好。随着进气流量的增加、温度的升高硝基苯的降解速率都会加快。催化臭氧化反应速率遵循一级反应规律,与苯酚的初始浓度和催化剂的用量关系不大。pH值对苯酚去除率有重要的影响,随pH值的升高,苯酚去除率显著提高。叔丁醇对硝基苯的降解有很强的抑制作用。 相似文献
56.
自动滴定仪用于沸石阳离子交换容量测定的方法 总被引:1,自引:0,他引:1
以甲醛法为基础,采用自动滴定仪电位滴定法测定沸石的阳离子交换容量,与pH计指示法、酸碱指示剂法相比,仪器灵敏度高、操作简单,使测定结果具有更高的准确度和更好的重复性。 相似文献
57.
Bench-scale synthesis of zeolite A from subbituminous coal ashes with high crystalline silica content 总被引:1,自引:0,他引:1
Metta ChareonpanichAuthor Vitae Ornanong JullaphanAuthor VitaeClarence TangAuthor Vitae 《Journal of Cleaner Production》2011,19(1):58-63
In this present work, fly ash and bottom ash with high crystalline silica content were obtained from the coal-fired boilers within the paper industries in Thailand. These coal ashes were used as the basic raw materials for synthetic zeolite production. The crystal type and crystallinity, specific surface area and pore size, and textural properties of zeolite products were characterized by using X-ray diffraction spectroscopy (XRD), N2 sorption analysis, and Scanning Electron Microscopy (SEM), respectively. It was found that sodalite octahydrate was selectively formed via the direct conventional (one-step) synthesis, whereas through a two-step, sodium silicate preparation and consecutive zeolite A synthesis process, 94 and 72 wt.% zeolite A products could be produced from the fly ash and bottom ash, respectively. The cation-exchange capacity (CEC) of fly ash and bottom ash-derived zeolite A products were closely similar to that of the commercial grade zeolite A. 相似文献