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污泥活性炭的制备及其脱色性能 总被引:11,自引:0,他引:11
以污水污泥为原料,采用物理活化法制得污泥活性炭,并用该活性炭处理染料废水,研究了pH值、污泥活性炭的投加量、温度、吸附时间等因素对染料废水的脱色率和COD去除率的影响。结果表明:用污泥制备的活性炭,其碘值和亚甲基兰吸附值分别为254.36 mg/g和20.26 mg/g,而且BET比表面积值为25.1995 m2/g,总孔容积为0.0399 m3/g,具有较好的吸附性能;将污泥活性炭用来吸附氨基黑染料,并与商品活性炭处理氨基黑染料的效果进行对比,自制污泥活性炭的脱色效果达到了商品活性炭的水平;污泥活性炭对氨基黑染料的吸附过程符合Langmuir吸附等温线。 相似文献
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《工业水处理》2021,41(8)
采用电催化氧化—活性炭处理焦化废水生化出水,研究电流密度、极板数量、间距、活性炭种类等因素对处理效果的影响。在生化出水COD为136.6 mg/L、TOC为56.6 mg/L条件下,当极板数量为2对、间距为1.8 cm、电流密度为20 mA/cm~2、反应6 h时,电催化出水COD去除率可达99.7%,TOC去除率为47.87%。相较于椰壳炭,比表面积大的煤质炭对电催化处理出水的吸附效果较好。当煤质炭投加量为20 g/L、反应120 min时,活性炭出水TOC总去除率可达67.88%。煤质炭吸附废水中有机物的过程更符合准二级动力学模型,颗粒内扩散模型反映该吸附是一个复杂过程。三维荧光光谱表征表明,电催化能氧化分解生化出水中部分类腐殖酸物质,活性炭可进一步吸附去除残留的类腐殖酸物质。 相似文献
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对活性炭材料在常温下应用于废水中染料的吸附性能和表征进行了研究。结果表明,不同的吸附时间明显影响活性炭材料对染料的吸附,在120min达到吸附平衡,最大吸附量是62.5mg/g,同时活性炭材料的吸附性能对废水中不同浓度的染料具有明显的吸附差异,说明活性炭是一种良好的吸附材料。 相似文献
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综述了近几十年来双官能团硅烷与双官能团单体反应的研究进展情况,期望对高聚物在工业应用方面的研究提供参考。 相似文献
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主要研究了在以聚乙烯醇为保护胶体的醋酸乙烯乳液聚合中,乳液与环氧丙烯酸酯、聚氨酯、硅烷等官能团的接枝反应.在以过硫酸铵为引发剂、以聚乙烯醇为保护胶体的醋酸乙烯乳液聚合中,乳液与上述各类官能团间发生的接枝反应直接影响乳液的黏度、固体含量、剪切强度等宏观性质.研究发现官能单体脂肪醇聚氧乙烯醚、丙烯酸异辛酯(2-EHA)等单体和丙烯酸(AA)与乙烯基三乙氧基硅烷共同作用时对乳液的宏观性质影响显著. 相似文献
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Hengfeng Miao Wenyi Tao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2008,83(3):336-344
BACKGROUND: Humic acids (HAs) are heterogeneous macromolecules widely dispersed in natural waters, which display significant resistance to biodegradation. Removal of HA by ozone and its related reaction mechanisms are investigated. RESULTS: Ozonation of HA showed a significant reduction of UV254, Color436 and had the capability of mineralizing the TOC to CO2 and improving the biodegradability. Fourier trandform infrared (FT‐IR) spectra, elemental composition analysis and high performance size exclusion chromatography (HPSEC) revealed that ozonation could not only change the structure characteristics but modify the molecular size distribution of HA. Volatile compounds detected by gas chromatography‐mass spectroscopy (GC‐MS) showed that ozonation brought out 43 different organics, which were identified as mainly: aldehydes, ketones, aromatics, carboxylic acids and alcohols. CONCLUSION: Ozonation of HA could be elucidated by the followed mechanism: ozonation with its direct and indirect pathway hydroxylated the HA in water, and polyhydroxy HA was further oxidized to bond rupture leading to the change of molecular structure and size distribution of HA, trimming out a series of small molecular volatile compounds. The volatile compounds with electron denoting group could be further oxidized to acids and esters, and even totally mineralized to CO2. Copyright © 2007 Society of Chemical Industry 相似文献
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Systemized organic functional group controls in polydiacetylenes and their effects on color changes
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A variety of organic functional groups have been successfully installed into polydiacetylenes (PDAs) and applied to the color change‐controlled system of PDA sensors. Ten diacetylene compounds possessing different functionalities and lengths were systemically synthesized and fully characterized using spectroscopic methods. The polymerized vesicle solution with these compounds showed different temperatures required to induce a color change (from blue to red) depending on the functionalities installed on 10,12‐pentacosadiynoic acid (PCDA) molecules. In addition, the results reported here reveal that the intermolecular interactions of PCDA molecules and the intermolecular distance play a key role to the color of PDA system. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45011. 相似文献
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The effects of additives with different functional groups, that is, hydroxyl and carboxyl groups, on the physical properties of starch/PVA blend films were examined. Starch/PVA blend films were prepared by the mixing process. Glycerol (GL) with 3 hydroxyl groups, succinic acid (SA) with 2 carboxyl groups, malic acid (MA) with 1 hydroxyl and 2 carboxyl groups, and tartaric acid (TA) with 2 hydroxyl and 2 carboxyl groups were used as additives. The results of measured tensile strength and elongation verified that hydroxyl and carboxyl groups as functional groups increased the flexibility and strength of the film. The degree of swelling (DS) and solubility (S) of the GL/SA‐added films were low. However, the DS and S of the films with added MA or TA with both hydroxyl and carboxyl groups were comparatively high. When the film was dried at low temperature, the properties of the films evidently improved, probably because hydrogen bonding was activated at low temperature. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3733–3740, 2006 相似文献
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蛋白质在载体表面的吸附行为,如其吸附速率、吸附量以及取向和构象的变化,在很大程度上依赖于载体材料的表面化学组成。调控载体材料的表面化学组成已成为控制蛋白质吸附行为的重要手段。本文主要对载体材料表面不同组成对蛋白质吸附行为的影响进行了归纳。介绍了材料表面的功能基团包括疏水基团(甲基和含氟基团)和亲水基团(羟基、氨基和羧基)对蛋白质吸附行为的影响。另外,在载体材料表面接枝聚合物链是一种常用的有效调控表面化学组成的方法。重点介绍了材料表面接枝不同聚合物链时,聚合物链的种类、长度、密度和链的结构对蛋白质吸附行为的影响。 相似文献