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51.
Li Yanhua Wu Long Xu Qing Li Zhanyong 《Journal of Material Cycles and Waste Management》2022,24(6):2353-2364
Journal of Material Cycles and Waste Management - A CaO-based biochar (CSC) prepared from waste crab shell was used as a low-cost CO2 sorbent to enhance sludge steam gasification for H2-rich gas... 相似文献
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南京市江宁区通过优化产业结构、提升环境治理、构筑生态新城等举措,打牢生态文明建设的现实基础。但对照国家生态文明示范区标准,在经济、社会、制度方面仍存在诸多制约因素。为此需逐步确立以科学规划为先导,以制度建设为根本,以产业转型为抓手,以乡村建设为载体,以生态德育为基点的生态文明建设思路。 相似文献
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负载TiO2的活性炭纤维改性电极电吸附除氟 总被引:2,自引:1,他引:1
采用溶胶-凝胶法制备TiO2凝胶,将TiO2凝胶涂覆在活性炭纤维表面并进行热处理制备改性电极(TiO2/ACF),利用扫描电子显微镜(SEM)、X射线衍射光谱仪(XRD)、比表面和孔隙度分析仪对负载前后电极的表面特性进行表征,并探讨了其对NaF溶液的电吸附效果。结果表明,电极负载TiO2后表面变得粗糙,比表面积和总孔体积减小,而介孔体积和平均孔径增大。此外,表面的TiO2同时以金红石和锐钛矿的晶型存在。电吸附实验结果显示,加电可以提高吸附容量,而且电压、pH和初始氟离子浓度均对电吸附容量产生影响:电压增大,吸附容量增加,当施加电压为2 V时,电吸附容量为1.03 mg/g,比开路电位时提高40%;pH可以通过影响氟离子在溶液中的存在形态和TiO2/ACF电极表面的羟基基团对电吸附容量产生影响;初始氟离子浓度升高,电极吸附容量增大,但是去除率降低。在处理初始氟离子浓度为4 mg/L的NaF溶液时,在2 V电压、中性pH和12 h的吸附时间下,改性ACF为电极的吸附量为1.32 mg/g。 相似文献
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磁性介孔锰铁复合氧化物对Cr(Ⅵ)的吸附性能研究 总被引:1,自引:0,他引:1
以复合金属草酸盐为前驱体制备了纳米晶构筑的介孔锰铁氧化物材料,采用透射电镜、X射线衍射仪和固体比表面测定仪等对产物进行了表征.并研究了其对水体Cr(Ⅵ)的吸附性能,考察了pH及离子强度对吸附容量的影响、吸附动力学、吸附等温线以及碱液对Cr(Ⅵ)的洗脱率。结果表明,获得的锰铁氧化物为纳米晶构筑的介孔材料,比表面达277.4 m2/g,对Cr(Ⅵ)在酸性条件下有较强的吸附性能。在初始Cr(Ⅵ)质量浓度为100 mg/L,pH值在2时,10 min内能使溶液中的Cr(Ⅵ)去除率达96.8%,最大Cr(Ⅵ)吸附容量Qm为40 mg/g。 相似文献
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Meng Chen Lisheng Jin Yanhua Liu Xiurong Guo Jiangwei Chu 《Environmental science and pollution research international》2014,21(2):1242-1247
The combination of plasma discharge and TiO2 photocatalysis exhibits high performances in the removal of nitrogen monoxide (NO). This article is aimed at elucidating the relationships between NO decomposition efficiency and various experimental parameters, including voltages, humidity and temperature. The experimental results indicate that the efficiency of NO removal by synergic plasma-catalyst coupling is significantly higher than plasma only or photocatalyst only systems. Moreover, the NO removal efficiency improves with the increase of applied voltage. Meanwhile, a higher humidity results in a reduced number of electron–hole pairs at the surface of TiO2 photocatalyst, leading to lower synergic purification efficiencies. Finally, the efficiency of NO removal is raised with the increase of temperature due to the fact that the adsorption of NO and water by nano-TiO2 is affected by environmental temperature. 相似文献
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Shaohong Wu Jikun Huang Yanhua Liu Jiangbo Gao Jun Yang Wentao Wang Yunhe Yin Hao Luan Wanlu Dong 《中国人口.资源与环境(英文版)》2014,(2)
Climate change strongly affected the structure and functions of natural ecosystems,e.g.the vegetation productivity decreased in the Northeast permafrost region due to the higher temperature and less precipitation,whereas in the Tibetan Plateau,the vegetation productivity increased,owing to the improved thermal resource.Climate change led to reduced precipitation in North and Northeast China and thus the reduced surface runoff.The public needs for energy were changed because of climate change,e.g.the shorter heating period in winter.Climate change profoundly influenced human health,pathophoresis and major projects by increasing extreme events,including frequency and magnitude,and causing more serious water shortage.Under the background of climate change,although the improved thermal resources can be helpful for extending the crop growth period,more extreme events may resulted in more instability in agricultural productivity.Not only did climate change indirectly affect the secondary and tertiary industries through the impacts on agriculture and natural resources,but also climate change mitigation measures,such as carbon tax,tariff and trading,had extensive and profound influences on the socioeconomic system.Further analysis indicated that the impact of climate change presented significant regional differences.The impact had its pros and cons,while the advantages outweighed the disadvantages.Based on the above analysis on the impacts of climate change,we put forward suggestions on coping with climate change.First,scientifically dealing with climate change will need to seek advantages while avoiding the disadvantages of climate change in order to achieve the orderly adaptation to climate change,which is characterized with"Overall best,long-term benefit."Second,quantitative adaptation should be given more attention,e.g.proposing operational schemes and predictable goals and using uncertainty analysis on adaptation measures.Third,more active coping strategy should be adopted to enhance China's future comprehensive competitiveness.The strategies include but are not limited to gradually adjusting the industrial structure,intensifying the research and development(RD)of emission reduction technology and actively responding to the influence of carbon tax,tariff and trading on socioeconomic development in China. 相似文献