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排序方式: 共有71条查询结果,搜索用时 0 毫秒
1.
研究了高浓度、高含盐的硝基苯酚废水治理方法.采用树脂吸附及电解氧化进行试验研究.结果表明:(1)XDA—Ⅱ型大孔吸附树脂对废水中硝基苯酚的吸附率几近100%,树脂再生率和硝基苯酚回收率均达95.4%,吸附对COD的去除率达44.1%.(2)吸附出水经填充床电解处理,COD去除率达52.2%.电解处理后,废水的厌氧可生化性显著提高. 相似文献
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以苯酚硝酸钠和浓硫酸为原料,合成邻硝基苯酚和对硝基苯酚,产率一般很低,讨论了以硝酸钠和浓硫酸为原料,在醋酸介质下进行硝化反应合成邻硝基苯酚同时提取对硝基苯酚。通过正交法确定最佳反应条件,并对实验结果进行讨论。 相似文献
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p nitrophenolisakindofimportantinterme diate,widelyusedinmedicine ,pesticides,dye[1 2 ] ,cameraandsoon .Itwasreportedthatp nitrophenolcouldbesynthesizedfromp ni trochlorobenzenethroughalkalinehydrolysis[3 5 ] ,butitshouldbeprocessedathightemperatureandunderhighpr… 相似文献
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文章以对硝基苯酚钠生产过程作为研究对象,分析生产中的关键控制点,进一步优化工艺参数,达到节能减排、降低能耗的目的。 相似文献
6.
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
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Fernando J Beltrn F Javier Rivas Olga Gimeno 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2005,80(9):973-984
Photocatalytic ozonation (1O3 + VUV + TiO2), ozonation (O3), catalytic ozonation (O3 + TiO2), ozone photolysis (O3 + VUV), photocatalysis (TiO2 + VUV) and photolysis (VUV) have been compared in terms of formation of intermediates, extent of, mineralization (TOC, COD, chloride, nitrate) and kinetics in the aqueous treatment of three phenols (phenol, p‐chlorophenol and p‐nitrophenol). In all cases, photocatalytic ozonation led to lower degradation times for chemical oxygen demand and total organic carbon removal. Intermediates formed were similar in the different oxidation systems with some exceptions. They can be classified into three different types: polyphenols (resorcinol, catechol, hydroquinone), unsaturated carboxylic acids (maleic and fumaric acids) and saturated carboxylic acids (glyoxylic, formic and oxalic acids). First order kinetic equations have been checked for the oxidation processes studied in the case of the parent compound. Rate constants of these systems have also been calculated. Copyright © 2005 Society of Chemical Industry 相似文献
9.
Haijia Su Qiang Li Tianwei Tan 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2006,81(11):1797-1802
A new chitosan molecular imprinted adsorbent obtained by immobilization of nano‐TiO2 on the adsorbent surface (surface‐imprinted adsorbent with nano‐TiO2) was prepared. Based on photocatalytic reaction and the surface molecular imprinting technology, this new kind of surface‐imprinted adsorbent with immobilization of nano‐TiO2 can not only adsorb template metal ions but can also degrade organic pollutants. The results showed that, after the nano‐TiO2 was immobilized on the adsorbent surface, the adsorption ability for the imprinted ion (Ni2+) of this new imprinted adsorbent immobilized with nano‐TiO2 was not affected, but the degradation ability for p‐nitrophenol (PNP) of the surface‐imprinted adsorbent with nano‐TiO2 increased three‐fold compared with that of the surface‐imprinted adsorbent without nano‐TiO2, from 23.8 to 76.1% (at an initial PNP concentration of 20 mg·dm?3). The optimal TiO2 concentration in the adsorbent preparation was 0.025 g·TiO2 g?1 adsorbent. The removal capacity for PNP reached 60.25 mg·g?1 (at 400 mg·dm?3 initial PNP concentration) under UV irradiation. The surface‐imprinted adsorbent with nano‐TiO2 can be reused for at least five cycles without decreasing the removal ability for PNP and the imprinted ion (Ni2+). Copyright © 2006 Society of Chemical Industry 相似文献
10.
A novel phthalimidomethyl polysulfone (PIPSf)/polysulfone(PSf) blend affinity membrane was prepared and applied for the removal of p‐nitrophenol from aqueous solutions. In this work, the chloromethylated polysulfone (CMPSf) was used to introduce phthalimido groups onto the polysulfone backbone by Gabriel reaction. The polymers can be easy to phthalimidomethylate to different degrees by control of the reaction temperature and time. Structures of the resulting polymers were confirmed by FT‐IR. The obtained polymers showed good solubility in dimethylformamide, dimethylacetamide and formed the affinity membrane blending with polysulfone at different blend compositions by the phase‐inversion method. Thus the properties of films were characterized with respect to water flux, pore size, and porosity. The surface and cross‐sectional views of the blend membranes were analyzed by scanning electron microscopy (SEM). The research on treatment of removal p‐nitrophenol was carried out by affinity membrane process. The adsorption capacity increased with increasing the initial concentration of p‐nitrophenol in aqueous solution, and the adsorption isotherm fitted the Freundlichmodel well. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献