ACF表面化学官能团对影响脱硫性能的研究进展

活性炭纤维(ACF)作为第三代活性炭,是一种新型的高效吸附剂和催化剂。它具有独特的物理性能和化学性能,对烟气中的SO2具有很强的吸附和催化氧化作用,因此作为烟气脱硫方面极具前景的催化剂而受到人们的普遍关注。以聚丙烯腈基活性炭纤维(PAN-ACF)为代表,主要深入探讨了ACF表面化学官能团对脱硫性能的影响。     

活性炭纤维对Cu2＋吸附性能的研究

研究了pH值、吸附接触时间、铜离子的初始浓度及活性炭纤维（ACF）的投加量对活性炭纤维吸附Cu2＋的影响，并选取了最佳的实验条件。用Langmuir方程和Freundlich方程拟合活性炭纤维对Cu2＋吸附等温线，结果表明：活性炭纤维吸附Cu2＋更符合Langmuir等温式，其相关系数为0．9995，以单分子层吸附为主。对活性炭纤维改性能明显提高对Cu2＋的吸附，其中效果最佳的吸附量从4．8mg／g增加到17．32mg／g，提高了3．6倍。     

铜改性活性炭纤维吸附甲醛实验研究

室内甲醛气体是一种常见的室内污染物,对人体有害。近年来,吸附甲醛的研究成为国内外的热点。使用超声波协同负载,在可塑性高的活性炭纤维(ACF)材料上负载铜离子改性用于治理室内甲醛等污染。利用扫描电子显微镜(SEM),光电子能谱(EDS)对载铜ACF进行表征,发现含铜化合物附着在ACF表面。其中的含铜基团对甲醛的吸附起了重要作用。根据吸附材料吸附对比研究,所得的载铜ACF吸附效果优于其他吸附材料,甲醛去除率在80min内可达到0.063mg/g,比未改性活性炭高26%,比活性炭高57.5%,比生物质炭高75%。     

活性炭纤维有机废气吸附回收装置

由河北中环环保设备有限公司开发的活性炭纤维有机废气吸附回收装置,可广泛应用于化工、石油化工、汽油装卸、印刷、涂装、橡胶加工、感光材料、塑胶、纤维、油漆制造等行业的有机废气回收、净化。主要技术内容一、基本原理该装置利用吸附、解吸性能优异的活性炭纤维作为吸附剂。有机废气经过预处理后进入吸附器,吸附器将有机废气吸附浓缩,再用水蒸汽将其脱附下来,经过冷凝将有机物回收再利用,从而达到节能降耗的目的。二、技术关键该设计选用活性炭纤维作为有机废气的吸附材料,吸附回收率可达92%～98%,其使用寿命是普通活性炭颗粒的3～4倍;…     

糠醛渣球形炭的制备及脱硫性能

以糠醛渣为原料,配以一定比例的粘合剂制备出球形活性炭(SAC-F).比较了SAC-F与活性炭纤维(ACF)和粒状活性炭(GAC-C)的流体力学性能,初步探讨了直径为4～5mm SAC-F的制备参数,考察了它的碘吸附值和对模拟烟气中SO2的脱除性能,以及物理和表面化学性质.结果表明,在相同的装填高度下,随着空速的增加,SAC-F上压降增加得最慢,ACF的增加速率是它的6～7倍,GAC-C是它的1～2倍;虽然SAC-F比GAC-C的比表面积和孔容都小,但其平均脱硫率为87%,明显优于GAC-C,与GAC-C相比,SAC-F表面含有较少的C-O.     

锰改性活性炭对Cr(Ⅵ)的吸附研究

Cr(Ⅵ)是一种高毒性重金属.为了探究炭质材料对水中六价铬的吸附行为,首次尝试用不同浓度的锰离子溶液对颗粒活性炭进行改性,研究了包括pH、温度、投加量和Cr(Ⅵ)初始浓度对原活性炭和改性活性炭的对比实验.结果表明在相同的条件下锰离子改性可以增加活性炭对Cr(Ⅵ)的吸附容量,溶液pH、温度、投加量和初始浓度对CKⅥ)的去除率有很大影响.活性炭对Cr(Ⅵ)的吸附等温线与Langrmuir模型有更好的线性相关性.     

小型废物焚烧炉烟气中二恶英类的控制研究

通过测试研究了不同除尘方案组合对焚烧炉烟气中二恶英的去除效果，分析了活性炭纤维的高效吸附作用。     

超声波载铁活性炭对磷的吸附研究

选用牛粪基活性炭进行负载,使用超声波协同浸渍负载铁,得到一种简单快速且成本较低的载铁活性炭制备方法。实验表明,在牛粪活性炭与铁盐在质量比1∶2,30℃下使用超声波浸渍40min为最佳的负载方法。利用扫描电子显微镜(SEM),X射线衍射(XRD),红外光谱法(IR)对优方案的载铁活性炭进行表征,发现含铁化合物均匀的分布在活性炭孔道中,无固定晶型。其中的含铁基团对磷的吸附起了重要作用。根据载铁活性炭吸附研究,所得的载铁活性炭对浓度为25mg/L的模拟含磷溶液去除率最高达96%以上。能较好的符合Freundlich热力学方程与拟二级动力学方程(R20.97),得到的最大吸附浓度达到19.723mg/g,吸附开始2min去除率即可达70%。     

过滤吸附装置人字形布置公式浅谈

过滤吸附装置是有机废气过滤吸附箱的核心部件，其人（之）字形布置公式系根据工程实践总结出来的计算公式。本文介绍了活性炭纤维吸附装置布置公式的提出背景、推导过程和应用验证，以及采用本公式的优点。     

清除水面、地面石油污染的方法(二)

<正> 三、用吸附材料清除水面上的浮油水面浮油层较薄,无法用机械收集时,通常使用吸附法。它与分散剂法的适用性不同,吸附法适用于收集厚度>0.1mm的浮油,而分散剂适用于厚度<0.1mm的浮油。目前所使用的浮油吸附材料可分为两大类:天然吸附材料(稻草、锯末、泥煤、活性炭、粉碎后的树皮、珍珠岩等)和化学合成吸附材料(聚氨酯泡沫、聚苯乙烯泡沫等)。由     

活性炭纤维在油田采出废水处理中的应用

针对油田采出废水的特点,以粘胶基活性炭纤维为原料,经二次炭化和二次活化方式处理制得ACF样品。以ACF为过滤材料,对延长某采油厂经过沉降、分离处理后的采油废水进行动态吸附实验,实验结果表明:经水蒸汽二次活化得到的ACF样品对选用的油田废水处理效果最佳,其悬浮物颗粒粒径中值0.496μm(<1.0μm)、悬浮物含量为0.77mg/L(<1.0mg/L)。     

活性炭烟气脱硫技术研究新进展

研制了新型活性炭脱硫剂－脱硫活性碳纤维。研究表明，脱硫活性碳纤维由于含碳量高、比表面积大、微孔丰富、孔径分布窄、有较多适于吸附ＳＯ２的表面官能团，因而吸附能力及吸附、脱附速度显著大于普通活性炭。在相同工艺条件下，脱硫活性碳纤维吸附容量为粒状疾性炭的４－５倍，空速粒达活性炭的１０倍。采用活性碳纤维脱硫可比普通活性碳脱硫剂用量成倍减少。另外，由于活性碳纤维阻力小，系统能耗可显著降低。活性碳烟气脱硫采用     

磁性活性炭吸附苯酚的初步研究

本文研究了磁性活性炭对苯酚的吸附性能;探讨了Cd2＋对苯酚在磁性活性炭上吸附的影响。目的是对磁性活性炭进行研究,以及为在实际废水中吸附处理苯酚提供参考。结果表明,磁性活性炭对苯酚的吸附过程符合拟二级动力学模型,R2为0.9935;与Freundlich吸附模型相比,Langmuir吸附模型能更好地描述磁性活性炭对苯酚的吸附行为;在不影响去除率的情况下,Cd2＋的存在使苯酚吸附处理最佳浓度由30 mg/L增大至50 mg/L;同时,Cd2＋对磁性活性炭和活性炭吸附苯酚分别具有促进和抑制作用。针对苯酚的吸附去除率,当无Cd2＋时,磁性活性炭的比活性炭的低10.65%～20.2%;当有Cd2＋时,磁性活性炭的比活性炭的高0.3%～7.71%。     

壳聚糖吸附处理废水的研究进展

壳聚糖吸附处理废水的研究包括其对废水吸附性能和吸附机理的研究两个方面。壳聚糖表现出了良好的吸附废水中重金属离子、染料分子和其它易引起变异物质的能力;壳聚糖对金属离子和染料的吸附机理模型研究理论意义重大,它将进一步推动壳聚糖的实际工程应用。     

Removal of phenol from aqueous solutions by adsorption

Experiments have been conducted to examine the liquid-phase adsorption of phenol from water by silica gel, HiSiv 3000, activated alumina, activated carbon, Filtrasorb-400, and HiSiv 1000. Experiments were carried out for the analysis of adsorption equilibrium capacities and kinetics. The adsorption isotherm model of the Langmuir-Freundlich type was the best to describe adsorption equilibrium data for phenol for the adsorbents studied. Results of kinetic experiments indicated that HiSiv 1000 had the highest rate of adsorption among the adsorbents studied and therefore more detailed studies were carried out with this adsorbent. The influence of particle size, temperature, and thermal regeneration on adsorption of phenol by HiSiv 1000 was evaluated. From particle size experiments it appeared that adsorption capacity of HiSiv 1000 did not change by changing the particle size, but the rate of adsorption decreased considerably by increasing the particle size. The effect of temperature on adsorption was studied by determining equilibrium isotherms for HiSiv 1000 at 25, 40, and 55 degrees C. The results showed that adsorption capacity decreased with increasing temperature. Thermal regeneration of HiSiv 1000 was performed at 360 degrees C. It was observed that adsorption capacity of HiSiv 1000 did not change after 14 regeneration cycles. Equilibrium experiments showed that the adsorption capacities of activated carbon and Filtrasorb-400 were several times higher than that of HiSiv 1000.     

Adsorption of arsenate and arsenite on ferrihydrite in the presence and absence of dissolved organic carbon

The adsorption of As(V) and As(III) on synthetic two-line ferrihydrite in the presence and absence of a peat humic acid (HAp), Suwannee River fulvic acid (FA), or citric acid (CA) was investigated. Previous work with goethite has demonstrated the ability of dissolved organic carbon (DOC) to decrease As(V) and As(III) adsorption. The results obtained demonstrate that As(V) adsorption on ferrihydrite was decreased only in the presence of CA. Arsenate decreased the adsorption of all organic acids except HAp. Both FA and CA reduced As(III) adsorption on ferrihydrite, while HAp had no effect. Fulvic and citric acid adsorption on ferrihydrite was decreased in the presence of As(III); however, FA and CA adsorption increased at lower pH, which was consistent with decreased As(III) adsorption. Peat humic acid did not decrease As(III) adsorption, and we believe that the adsorption process of HAp and As(III) and As(V) on ferrihydrite are independent of each other. Previously, we observed that As(V) adsorption on goethite decreased in the presence of HAp > FA > CA, while As(III) adsorption on goethite was decreased similarly to that on ferrihydrite in the presence of CA > FA approximately HAp, yet As(III) adsorption on ferrihydrite was greater than on goethite. The observed differences between this study and the earlier study on goethite are believed to be an intricate function of ferrihydrite's surface characteristics, which affect the mechanisms of adsorption and hence the affinity of organic acids such as HAp, FA, and CA for the ferrihydrite surface. As such, the adsorption of DOCs to ferrihydrite are assumed to be less favorable and to occur with a fewer number of ligands, resulting in lower surface coverage of weaker bond strength.     

重金属在沉积物系统中吸附行为的研究进展

本文综述了沉积物吸附重金属的研究进展，主要讨论了沉积物的表面特征，吸附过程的模拟，等温吸附模式及其影响因子等方面的问题。