共查询到20条相似文献,搜索用时 58 毫秒
1.
2.
3.
4.
论文研究了微波法和碱法对吸附饱和卤乙酸的活性炭纤维(ACF)的再生。试验以二氯乙酸(DCAA)和三氯乙酸(TCAA)作为吸附质,比较了两种方法对在不同条件下吸附于ACF上的DCAA和TCAA的脱附效率和再生效率的影响。结果表明:在微波功率450W的条件下,吸附饱和的ACF具有较高的再生效率,对DCAA和TCAA的再生率分别为54.28%和51.05%。碱法再生显示高浓度的碱再生剂有利于卤乙酸的脱附,而低浓度的碱再生剂有利于再生效率的提高。当再生液浓度为1%时,ACF对DCAA和TCAA的再生率最佳,分别为75.75%和56.29%。 相似文献
5.
活性炭纤维(ACF)作为一种新型的炭质催化吸附材料,能有效吸附脱除各种气态污染物,较以往的颗粒状活性炭、粉状活性炭,拥有更优越的吸附和脱附再生性能。通过研究传质过程对脱除气态污染物反应速率的影响,并将ACF与颗粒状活性炭(GAC)的孔内传质过程进行了比较,结果表明ACF内扩散阻力较小。 相似文献
6.
为了对有机物吸附饱和的活性炭纤维(ACF)进行电化学再生研究,以含油废水为模拟有机物,通过测量再生前后ACF对含油废水的吸附效果,考察了电流密度、再生时间、pH值、电解质的电化学再生的影响因素,并研究了电化学再生过程对ACF结构的影响以及ACF电化学再生的机理。结果表明,在电流密度为30 mA·cm-2,pH值为4,15 g·L-1 NaCl的溶液中再生120 min,再生率可达到90%,5次电化学再生循环后,ACF保持较高的吸附容量。再生后ACF的表面没有明显损伤,比表面积也没有明显减小,微孔孔径分布于0.5~1.0 nm。由紫外光谱分析可知,ACF的电化学再生机理主要包括电脱附及电化学氧化过程。 相似文献
7.
活性碳纤维对硝基酚的吸附行为和应用研究 总被引:8,自引:0,他引:8
研究了粘胶基活性碳纤维(ACF)在水溶液中对硝基酚的吸附行为,包括ACF对硝基酚的吸附等温线、吸附容量、再生方法、吸附和再生速率、对硝基酚的吸附选择性等。结果表明:ACF对硝基酚的吸附容量达到664mg g,该吸附是一个可逆过程,吸附和解吸速率快;采用质量分数10%的NaOH作再生剂,可以恢复吸附能力,重复进行吸附-再生过程,ACF的吸附容量不变,对硝基酚的回收率均>90%。对进水硝基酚质量浓度为9790mg L的废水,吸附处理后出水浓度达到一级排放标准,同时可以回收硝基酚。 相似文献
8.
活性碳纤维吸附水溶液中的二价铅离子 总被引:9,自引:0,他引:9
对活性碳纤维(ACF)吸附水溶液中的二价铅离子进行研究。分别运用静态和动态方法来考察ACF吸附Pb^2 的性能,测定了吸附等温线,探讨了吸附时间、DH值等因素对吸附的影响,并进行了ACF的再生实验。结果表明,ACF对水中二价铅离子的吸附特性良好,且吸附剂易于再生,可作为去除水中离子态重金属的优良吸附剂。 相似文献
9.
各向异性导电胶膜(ACF)作为一种新型的互连材料,被越来越广泛地应用在各类智能卡中。简述了ACF的结构特点,连接原理,并详细介绍了ACF在不同类型智能卡中的互连应用,以及ACF粘接工艺和工艺参数。 相似文献
10.
11.
乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
12.
13.
14.
15.
The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
16.
我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
17.
Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
18.
19.
20.
A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献