共查询到20条相似文献,搜索用时 73 毫秒
1.
以N-甲基苯胺为单体,酶解木质素(LG)为分散剂,通过原位聚合法制备聚甲基苯胺-木质素复合物(PMALG)。采用恒温静态吸附法,研究PMA-LG对亚甲基蓝(MB)的吸附性能。通过红外光谱、紫外-可见光谱和热重分析表明成功得到了PMA-LG复合物。MB的吸附结果表明,PMA-LG复合物对MB的吸附效果明显优于聚甲基苯胺和LG对MB的吸附效果。在吸附温度为30℃,MB的初始浓度为10.0 mg/L时,PMA-LG对MB的吸附容量为4.97 mg/g,吸附率高达99.3%。 相似文献
2.
3.
4.
以玉米穗轴为原料、碳酸氢钠为化学活化剂通过微波辐照制备活性炭,采用中心组合设计(CCD),运用响应面法(RSM)进行工艺参数优化.考察了辐照功率、辐照时间和浸渍比对亚甲基蓝(MB)吸附值和产率的影响,通过模型优化确定最佳工艺参数为:辐照功率为385.74 W,辐照时间为5 min,浸渍比为4,该条件下制备的活性炭的亚甲基蓝(MB)吸附值和产率的实验结果和预测值分别为241.76 mg/g、27.39%和253 mg/g、28.28%,二者基本相符,验证了模型的有效性. 相似文献
5.
采用化学沉淀法制备了一系列的Zn改性氧化硅(0.1Zn-Si、0.2Zn-Si和0.4Zn-Si)和纯氧化硅(0.0Zn-Si)介孔材料,并探讨了介孔Zn-Si材料对亚甲基蓝(MB)的吸附行为。详细的考察了p H、时间和温度对吸附量性能的影响。结果表明,在酸性条件下,Zn-Si样品的吸附容量高于纯的Si O2材料,特别是0.2Zn-Si样品的吸附量达到228.88 mg/g;实验数据表明,Zn-Si介孔材料对亚甲基蓝的吸附过程符合假二级动力学方程和Langmuir等温吸附模型。 相似文献
6.
7.
8.
9.
10.
污泥活性炭的制备及对亚甲基蓝吸附性能研究 总被引:1,自引:0,他引:1
以城市污水处理厂的剩余污泥为原料,磷酸为污泥活化剂,采用微波加热法制备了污泥活性炭,考察了吸附剂投加量、吸附时间和p H对吸附效果的影响,并对其吸附动力学特性进行了探讨。结果表明:p H为8,投药量m为0.26 g,吸附时间为59 min,吸附温度为35℃,吸附浓度为58 mg/L时,污泥活性炭对亚甲基蓝的吸附效果最佳。污泥活性炭对亚甲基蓝的吸附满足Langmuir等温吸附方程。 相似文献
11.
12.
13.
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
14.
15.
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
16.
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
17.
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
18.
19.
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
20.