共查询到17条相似文献,搜索用时 140 毫秒
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粉末活性炭静态吸附水中硝基酚的试验研究 总被引:1,自引:0,他引:1
研究了常温(20℃)条件下粉末活性炭(PAC)对水中3-硝基酚、4-硝基酚、2,6-二硝基酚和2,4-二硝基酚4种硝基酚的静态吸附规律;并对照研究了未驯化的灭活活性污泥存在时,PAC对硝基酚的吸附性能。结果表明:PAC对4种硝基酚的吸附能力远大于灭活活性污泥;当硝基酚与PAC的质量比值在0.2~1.0时,PAC对4种硝基酚的吸附在60 min内可达到平衡,且均符合Langmiur吸附模型;用Langmiur吸附模型对试验数据进行拟合,得出了PAC对4种硝基酚的饱和吸附容量和吸附系数。 相似文献
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以速生材红麻秆芯为原料,磷酸为活化剂,采用传统磷酸活化法和机械力预处理磷酸活化法制备红麻秆基活性炭。考察了不同活化时间下2种制备方法对红麻秆基活性炭得率和吸附性能的影响,并借助比表面积分析仪、红外光谱仪表征了活性炭的孔结构及表面官能团特征。结果表明:相比于传统磷酸活化法,机械力作用能使磷酸渗入到原料里层,提高活化效率,使活性炭具有更高的得率、吸附性能、BET比表面积和孔容。在活化时间90 min下,机械力预处理磷酸活化法制得的活性炭得率为50.24%,碘吸附值为1 024 mg/g,亚甲基蓝吸附值为275 mg/g,BET比表面积为1 625.42 m2/g,总孔容为0.762 cm3/g。由孔径分析可知,2种方法制备的活性炭均以微孔为主,并含有一定数量的中孔。由红外光谱分析可知,机械力预处理不会破坏炭化物的基本结构,2种方法制备的活性炭表面均含有—OH、C—O和C=O等含氧官能团。 相似文献
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用磷酸盐催化预处理制备粘胶活性炭纤维毡 总被引:6,自引:0,他引:6
由磷酸盐催化处理的粘胶纤维毡在N2气氛下于820℃炭化,随后用水蒸汽活化,测定了粘胶活性炭纤维毡的比表面积及其静态苯吸附量。考察了磷酸盐的浓度对炭化收率及各种工艺因素对粘胶活性炭纤维毡活化性能的影响。经催化预处理820℃下水蒸汽活化的粘胶活性炭纤维其比表面积在1500~2100m2/g(BET)之间,静态苹吸附县为70Wt%~90Wt%。通过磷酸盐催化预处理可有效地提高粘胶纤维毡的炭化收率,改善粘胶活性炭纤维毡的吸附特性。 相似文献
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为得到导电性良好的棉织物,采用硫酸镍超声活化法制备化学镀镍导电棉织物。用EDS和SEM对镀层的化学成分以及表面形貌进行表征,并对镀镍后棉织物的表面方阻、增重率、耐摩擦性能和拉伸断裂强度进行测试。探讨了温度、pH、NiSO4·6H2O 浓度、NaH2PO2·H2O浓度对棉织物增重率、表面方阻的影响。结果表明:在m(NiSO4·6H2O):m(NaH2PO2·H2O):m(H2O)=1.5:2:30,温度60 ℃,频率为40 KHz,功率为320W的条件下超声活化30 min后,以NiSO4·6H2O浓度25 g/L,NaH2PO2·H2O浓度20~25 g/L,Na3C6H5O7·2H2O浓度5 g/L,C2H3NaO2浓度5 g/L,温度90 ℃,pH 5~6,反应时间1 h时。所制备的镀镍导电棉织物表面方阻最小,最好可达71.67 mΩ/□且具有良好的耐摩擦性能。良好的导电性以及耐摩擦性能使其能更好的应用在智能纺织品上。 相似文献
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棉杆活性炭的制备及其结构表征 总被引:1,自引:0,他引:1
《炭素技术》2016,(1)
以棉花秸秆为原料,ZnCl_2与AlCl_3组成的熔盐为活化剂,采用化学活化法制备活性炭。利用正交实验探讨了熔盐与原料比例、ZnCl_2与AlCl_3的比例、浸渍时间、活化温度、保温时间对制备的活性炭收率和碘吸附性能的影响,得到了熔盐活化法制备棉杆活性炭的最佳工艺条件:熔盐与棉杆比例为1.5:1、熔盐中ZnCl_2与AlCl_3比例为9:1、浸渍时间16 h、活化温度650℃、保温时间90 min,在此工艺条件下制备的活性炭的收率为23.06%,碘吸附值为708.32 mg/g;采用SEM和XED对制备的活性炭进行表征,结果表明:活性炭的表面分布了发达的、大小形状不一样的孔洞,且活性炭内部是由类石墨结构组成的,但石墨微晶层片排列比较紊乱,石墨化程度不高。 相似文献
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Thermo-foaming of activated carbon (AC) powder dispersions in an aqueous sucrose resin followed by carbonization has been studied to prepare carbon foams. The dispersions were characterized by viscosity measurements and sedimentation studies. The OH to OH condensation reactions, leading to the cross-linking of the sucrose polymer, were retarded by the AC powder. The AC particles adsorbed on the gas–liquid interface stabilized the gas bubbles that resulted in foaming of the poorly cross-linked sucrose polymer resin having low viscosity. The carbon produced by the carbonization of the sucrose polymer binds the AC particles as in reaction bonding. The carbon foams have an interconnected cellular structure. Density (0.138–0.22 g/cc), cell size (0.62–3 mm) and compressive strength (0.42–3.4 MPa) of the carbon foams depends on the AC powder to sucrose weight ratio. Incorporation of the AC powder in the sucrose resin decreases the carbonization shrinkage that enables the preparation of large carbon foam bodies without warping. The carbon foam prepared at an AC powder to sucrose weight ratio of 0.1 shows the highest density and compressive strength and the lowest cell size. 相似文献
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Preparation of reactive nanoscale carbon black dispersion for pad coloration of cotton fabric 下载免费PDF全文
A reactive dispersant (SMA–ESA) was synthesised from poly(styrene‐alt‐maleic anhydride) (SMA) and 4‐(beta‐sulfatoethylsulfonyl)aniline (ESA), and its dispersing ability for carbon black (CB) was investigated. Fourier transform infrared (FTIR) and 1H–nuclear magnetic resonance (NMR) spectroscopies showed that an amidation reaction took place between ESA and SMA. The optimal preparation conditions for reactive nanoscale CB dispersion were a mole ratio of ESA to SMA of 4:3, with a mass ratio of SMA–ESA and CB at 3%, sonication time 20 min, and pH 8. The reactive nanoscale CB dispersion prepared under optimal conditions showed excellent stability and small mean particle size. A cotton fabric coloured with reactive nanoscale CB dispersion could obtain a high K/S value, and excellent rubbing and washing fastness. 相似文献