改性粉煤灰对甲基对硫磷的吸附处理

用溴化十六烷基三甲胺(CTMAB)对粉煤灰改性,进而用于处理模拟甲基对硫磷废水,研究其主要影响因素。     

改性蜂窝煤渣吸附水中对硝基苯酚研究

利用三乙醇胺(TEA)、溴化十六烷基三甲胺(CTMAB)分别改性蜂窝煤渣,研究了改性煤渣吸附水中对硝基苯酚的性能。结果表明:TEA煤渣的有机碳含量与对硝基苯酚的饱和吸附量呈正相关;改性煤渣对水中对硝基苯酚的饱和吸附量也远高于原煤渣;用改性煤渣处理含对硝基苯酚废水效果良好。     

有机改性膨润土对聚丙烯酰胺吸附性能的研究

研究了有机改性膨润土对石油废水中聚丙烯酰胺(PAM)的去除效果。实验结果表明：由溴化十六烷基三甲铵(CTMAB)阳离子改性的膨润土和双阳离子改性的膨润土对PAM的吸附等温线都符合Langmuir等温吸附曲线，改性膨润土的层间距的大小是影响饱和吸附量的一个重要因素，质量分数为7％的单阳离子改性膨润土对PAM的去除率可达到90％122上；双阳离子改性膨润土对：PAM的饱和吸附容量随长碳链表面活性剂CTMAB的增加而增加。     

改性粉煤灰吸附甲苯的实验研究

粉煤灰是电厂的典型废弃物,且具有一定的吸附能力,可作为一种较为经济的吸附剂供人们使用。为提高和改善其吸附性能,采用酸改性方法和微波联合酸碱改性方法制备了两种改性粉煤灰,对比原粉煤灰,探究了两种改性粉煤灰对于甲苯的吸附性能,并通过SEM和BET对粉煤灰改性前后进行表征。结果表明：酸改性粉煤灰吸附甲苯达到吸附饱和时间为380 min,最大甲苯吸附量为39 mg/g,微波联合酸碱改性粉煤灰性能最好,反应达到吸附饱和时间为470 min左右,对甲苯的最大吸附量达到48 mg/g。     

粉煤灰改性及其吸附应用研究进展

从物理改性(机械磨细改性和高温改性、微波改性、超声波改性)、化学改性(酸改性、碱改性、盐改性)和联合改性三个方面,介绍了近年来国内外对粉煤灰进行改性研究的各种方法,指出了粉煤灰改性及应用中需进一步解决的问题,为其未来的研究方向提出了展望。     

粉煤灰改性及其吸附应用研究进展

从物理改性(机械磨细改性和高温改性、微波改性、超声波改性)、化学改性(酸改性、碱改性、盐改性)和联合改性三个方面,介绍了近年来国内外对粉煤灰进行改性研究的各种方法,指出了粉煤灰改性及应用中需进一步解决的问题,为其未来的研究方向提出了展望。     

改性粉煤灰对苯酚的吸附特性研究

研究了苯酚在改性粉煤灰上的吸附特性。结果表明，改性粉煤灰吸附苯酚速率快，在低pH值下吸附效果更好，等温吸附过程符合Freundlich模型，其吸附等温线为q=1．7081C^0.9248。     

改性粉煤灰对有机废水的吸附试验研究

将粉煤灰改性后对印染废水进行了吸附研究,找到较好的工艺条件与吸附效果。结果表明：对于COD20～150mg／L的印染废水溶液,粉煤灰用量以40g/L为宜,pH值为4．0,脱色率在32％以上。用0．1mol／L硫酸改性粉煤灰吸附印染废水的pH为4．0,投加量为24g／L,脱色率在47％以上,吸附处理后染料废水COD为76mg／L,COD去除率为21％。     

改性粉煤灰对有机废水的吸附试验研究

本文将粉煤灰改性后对印染废水进行了吸附研究,找到较好的工艺条件与吸附效果。结果表明：对于COD 20～150mg／l的印染废水溶液,粉煤灰用量以40g／l为宜,pH为4．0,脱色率在32％以上。用0．1mol／l硫酸改性粉煤灰吸附印染废水的pH为4．0,投加量为24g／l,脱色率在47％以上,吸附处理后染料废水COD为76mg／l,COD去除率为21％。     

改性粉煤灰对有机废水的吸附试验研究

本文分别用改性前和改性后的粉煤灰对模拟印染废水进行吸附研究,通过试验得到较优化的工艺条件,结果表明,粉煤灰经酸改性后,其吸附效果大大提高。     

改性膨润土对甲胺磷的吸附研究

探讨了经十二烷基苯磺酸钠改性并煅烧的膨润土对甲胺磷的吸附性能。结果表明改性的方法能够明显改善膨润土在水中的沉降与过滤性能 ,较大地提高了膨润土对甲胺磷的吸附能力。经1 0 %的十二烷基苯磺酸钠改性 ,30 0℃煅烧处理后所得的改性膨润土对甲胺磷的吸附量可达 1 5mg L以上 ,对浓度为 70mg L的甲胺磷废水 ,当改性膨润土的用量为 2 5g L时 ,对甲胺磷的去除率为 88%。     

粉煤灰对甲基橙的吸附研究

研究了粉煤灰对甲基橙的吸附性能,探讨了各种处理条件对吸附效果的影响。结果表明:对于80mL初始浓度为6.4mg·L-1的甲基橙模拟废水,采用10g·L-1粉煤灰对其进行吸附处理,当pH=3～5时,于20℃下恒温振荡1.5h,其去除率可达99.5%。     

粉煤灰泡沫玻璃工艺性能的研究

以粉煤灰和废玻璃为主要原料，添加适量发泡剂、助熔剂等制备粉煤灰泡沫玻璃。讨论分析了成型压力和退火制度等工艺过程对泡沫玻璃性能的影响。     

粉煤灰堇青石多孔微晶玻璃的初步研究

以粉煤灰为主要原料，成功合成了堇青石微晶玻璃。XRD分析表明堇青石是材料中的主要晶相。EPMA的分析结果表明合成的微晶玻璃中，堇青石晶粒细小均匀，含量达到80％，它们与玻璃相交织成浸染状，两者均匀分布。该陶瓷抗热震发良好，1200℃－28℃水淬火循环37次不破裂。     

粉煤灰的综合利用

简要介绍了粉煤灰资源的综合利用途径。     

粉煤灰处理废水的机理及应用

本文讨论了粉煤灰的吸附机理及吸附规律，分析了影响其吸附性能的主要因素，并结合国内外研究成果，简要介绍粉煤灰吸附处理废水的几种途经。     

Surface‐Treated Activated Carbon for Removal of Aromatic Compounds from Water

Modifications of commercial activated carbons by chemical treatment with HNO₃ or HCl and HF and the adsorption behavior of simple aromatic compounds (aniline, pyridine, phenol, and benzene) on activated carbon and modified activated carbon were investigated. The results show that the textural properties change a little after these modifications, but the surface acidity (mainly oxygen‐containing groups) of activated carbon modified with HNO₃ increases greatly. The effect of ash of activated carbon on adsorption of the organic compounds mentioned above is insignificant. However, addition of surface acidity (mainly surface oxygen‐containing groups) decreases the adsorption capacity of compounds significantly. The adsorption uptake of compounds on activated carbon with oxidation of HNO₃ is low possibly due to dispersive interaction, water cluster blocking, or competition between water and compounds adsorbed on activated carbon's surface because of hydrophilic increase of the activated carbon surface. The solubility of aromatic compounds in water has an important effect on the adsorption capacity of activated carbon. q_m and K_L (Langmuir adsorption parameters) for the aromatic compounds vary similarly.     

新生MnO2对茜素红吸附脱色的研究

以新生MnO2为吸附剂,对水中茜素红染料进行了脱色研究,探讨了影响吸附的因素。结果表明,降低pH值、增加吸附剂投加量,有利于新生水合二氧化锰对茜素红染料的脱色。当新生态水合MnO2浓度为300 mg/L,茜素红浓度为400 mg/L,pH=2,反应时间为60 min时,茜素红脱色率达90%以上。实验还发现对茜素红染料吸附较好符合Freundich吸附等温式,吸附速率较快。     

Removal of Orange II by Phosphonium-modified Algerian Bentonites

An Algerian montmorillonite was modified with two organic surfactants, methyltriphenyl phosphonium bromide and n-hexyltriphenyl phosphonium bromide. The solids obtained were used as adsorbents to remove Orange II, an anionic dye from aqueous solutions. Batch experiments were conducted to study the effects of temperature (20–60°C), initial concentration of adsorbate (50–150 mg L^?1) and pH of solution 6.5 on dye adsorption. Due to their organophilic nature, exchanged montmorillonites were able to adsorb Orange II at a very high level. Adsorption of Orange II for B-NHTPB and B-MTPB at different pH show that the adsorption capacity clearly decreases with an increase in pH of the initial solution from 2 to 8, this decrease being dramatic for pH > 8. This may be due to hydrophobic interactions of the organic dye with both phosphonium molecules and the remaining non-covered portion of siloxane surface. The kinetics of the adsorption was discussed on the basis of three kinetic models, i.e., the pseudo-first-order, the pseudo-second-order, and the intraparticle diffusion models. Equilibrium is reached after 30 min and 60 min for B-MTPB and B-NHTPB, respectively; the pseudo-second-order kinetic model described very well the adsorption of Orange II on modified bentonites. The non-linear Langmuir model provided the best correlation of experimental data, maximum adsorption of Orange II is 53.78 mg g^?1 for B-NHTPB and 33.79 mg g^?1 for B-MTPB. The thermodynamic parameters, such as free energy of adsorption (ΔG°), enthalpy change (ΔH°), and entropy change (ΔS°) were also determined and evaluated. From thermodynamic studies, it was deduced that the adsorption was spontaneous and exothermic.     

膨润土的改性对水中氨氮和磷的去除效果研究

为了探索寻找到一种价格低廉、效果明显的降低水体氨氮和磷含量的方法,对具有资源丰富、价格便宜的膨润土灰进行了改性及吸附氨氮和磷的静态试验研究,结果表明：对膨润土进行酸、碱、盐和热改性后氨氮的吸附效果有所不同,顺序依次为：热〉碱〉盐〉酸;对膨润土进行酸、碱、盐和热改性后对磷的吸附效果也不同,顺序为：盐〉热〉酸〉碱。技术经济比较,热改性膨润土对氨氮的吸附容量大,而盐改性膨润土对磷的吸附容量大,在两种情况下膨润土是较理想的吸附剂。