共查询到17条相似文献,搜索用时 125 毫秒
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超高交联树脂吸附对硝基苯乙酮和对硝基苯甲酸的研究 总被引:1,自引:0,他引:1
研究了NDA-150、NDA-99、NDA-88、Amberlite XAD-4.4种吸附树脂对对硝基苯乙酮和对硝基苯甲酸的静态吸附行为。结果表明NDA—150树脂对硝基化合物的吸附效果较好。并研究NDA-150树脂的动态吸附和脱附行为.结果显示:NDA-150树脂对对硝基苯甲酸的吸附容量为2.32mmol/g干树脂,对对硝基苯乙酮的吸附容量为3.06mmol/g干树脂。NDA—150树脂易于脱附,吸附对硝基苯甲酸后.用2%NaOH:乙醇(体积比1:1)作脱附剂,温度313K;吸附对硝基苯乙酮后,用甲醇作脱附剂,温度333K,体积6BV,脱附率均接近100%。 相似文献
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《过程工程学报》2015,(5)
合成了聚苯乙烯?二乙烯苯吸附树脂NDA-150,研究了NDA-150和市售吸附树脂XAD-4对苯酚和2-萘酚的静态和动态吸附性能.结果表明,在研究的浓度范围内,吸附符合Langmuir等温吸附方程且吸附为放热过程.NDA-150对苯酚和2-萘酚的吸附与树脂的比表面积、微孔面积及酚类物质的疏水性有关.随流速增大,树脂穿透时间及饱和时间提前,平衡吸附量降低;初始溶液浓度增大,树脂穿透时间及饱和时间提前,平衡吸附量增大.NDA-150树脂对2-萘酚和苯酚的动态吸附较好地符合Thomas模型和LDF模型.含0.1 mol/L Na OH的60%乙醇溶液从NDA-150树脂中脱附2-萘酚和苯酚,脱附率可达90%以上. 相似文献
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5-磺基水杨酸的吸附研究 总被引:1,自引:0,他引:1
欧阳华勇 《化学工业与工程技术》2008,29(2):14-17
用丙烯酸系树脂XAD-7和超高交联树脂NDA-150对5-磺基水杨酸进行了吸附研究。结果表明,在无甲醇的水溶液中,超高交联树脂NDA-150对5-磺基水杨酸有明显的吸附优势,其吸附量大于丙烯酸系树脂XAD-7;在有甲醇存在的溶液中,超高交联树脂NDA-150的吸附能力明显下降,而丙烯酸系树脂XAD-7的吸附能力却几乎不受甲醇的影响。范德华力是超高交联树脂NDA-150在吸附过程中的主要作用力,而氢键是丙烯酸系树脂XAD-7在吸附过程中的主要作用力。 相似文献
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以环硫氯丙烷和多乙烯多胺为原料,通过交联反应合成了巯基胺型树脂(PA树脂)。然后对PA树脂进行氯乙酸化反应,合成了巯基胺型羧酸螯合树脂(PAC树脂),并通过傅立叶变换红外光谱仪(FTIR)对其结构进行了表征。研究了PAC树脂对模拟含Cu2+电镀废水的吸附性能,探讨了树脂用量、吸附时间和pH对Cu2+吸附性能的影响。实验结果表明,在常温常压下,取25 mL浓度为10 mmol/L的废水溶液,PAC树脂吸附Cu2+的最佳用量为0.40 g/mmol Cu2+,最佳吸附时间为150 min,最佳pH为6~10,最大吸附量和最大吸附率分别达到2.53mmol/g和94.7%。PAC树脂对Cu2+的吸附过程符合Langmiur和Freundlich等温吸附方程。 相似文献
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研究了漆酚-水杨酸吸附Hg2 的动力学和热力学特性.结果表明,漆酚-水杨酸树脂对Hg2 的吸附符合Langmiur吸附模型,吸附等温线与Langmiur方程高度相关.在25℃,Langmiur吸附系数a=33.9,饱和吸附量Qm=264 mg·g-1. Langmiur吸附表观速率常数k=1.71 h-1. 相似文献
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《分离科学与技术》2012,47(4):687-693
In the present work, a modified hypercrosslinked polymeric resin (AH-1) with tertiary amino groups was adopted for adsorbing aniline from aqueous solution, and a traditional hypercrosslinked polymeric adsorbent NDA-100 was selected for comparison. Favorable aniline adsorption was observed at higher solution pH in the range of 5–11, and a further decrease of solution pH resulted in a marked decrease of adsorption capacity. The fact that AH-1 had higher adsorption capacity than NDA-100, would be attributed to the enhanced adsorbent-adsorbate interaction for tertiary amino group introduced on the polymeric matrix. The adsorption process was found to be exothermic and data conformed to the Freundlich equation. In addition, the adsorption kinetic study testified that a pseudo-second kinetic mechanism for the adsorption system, and the rate constant of AH-1 was larger than that of NDA-100. More favorable adsorption of aniline onto AH-1 than NDA-100 was further demonstrated by column adsorption runs which indicated that aniline could be effectively removed from aqueous solution by AH-1. Moreover, AH-1 exhibited a better desorption performance than NDA-100, nearly 100% regeneration efficiency for the spent AH-1 was achieved by 5% hydrochloric acid for its repeated use, implying its potential application in associated wastewater treatment. 相似文献
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《分离科学与技术》2012,47(3):494-501
The adsorption process between porous resins with different surface properties and nonylphenol non-ionic surfactants of the same hydrocarbon chain length but varying oxyethylene units was investigated. The adsorption of NPEOn with shorter EO chains is greater than those with longer EO chains on the surfaces of resins, and the strength of the adsorption was affected by resin surface-surfactant and surfactant-surfactant lateral interactions. Lateral interactions are endothermic, and contribute more to the adsorption process on aminated resins (MN-100, MN-150) than on hyper-crosslinked resins (MN-200, NDA-150). The surface interactions are mainly due to bonding between the hydrophobic moiety of the surfactant and hydrophobic surfaces of the resins without electrical interaction or hydrogen bonding, even on aminated resins (MN-100, MN-150). Positive ΔH values indicate that the adsorption process is endothermic overall, which is supported by the increase in adsorption capacity observed with increasing temperature. 相似文献
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研究了胺基修饰的超高交联吸附树脂NDA-99对水溶液中对甲苯磺酸、4-氯苯磺酸、4B酸等3种芳香磺酸的静态吸附性能。结果表明,Freundlich方程能够对3种芳香磺酸的吸附等温线进行很好的拟合,相关系数均大于0.99,其平衡吸附量的顺序为4B酸>对甲苯磺酸>4-氯苯磺酸。对吸附热力学与动力学的研究表明,NDA-99树脂对3种芳香磺酸的吸附均为自发进行的放热过程,主要表现为物理吸附;4-氯苯磺酸的吸附速率主要由液膜扩散控制,而对甲苯磺酸和4B酸吸附速率主要由颗粒内扩散控制。 相似文献
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大孔螯合树脂对Pb2+的吸附行为及机理 总被引:6,自引:4,他引:2
通过静态和动态吸附实验,研究了Pb2+在D418树脂上的吸附行为,从热力学和动力学方面对吸附过程进行了分析,并通过红外光谱探讨了吸附机理. 结果表明,在所研究的条件范围内,Pb2+在D418树脂上的吸附是吸热过程,同时符合Freundlich和Langmuir等温吸附方程;液膜扩散为Pb2+在D418树脂上吸附速率的主要控制步骤,随着溶液初始浓度的增大,吸附速率逐渐减小;313 K温度下树脂的静态饱和吸附容量为375 mg/g,在298 K下用3 mol/L的硝酸作为解吸剂,解吸率可达97%;最佳的解吸剂用量为5倍床层体积. 该树脂吸附操作简单,易再生,不产生二次污染,有望用于含铅废水的治理及铅的富集. 相似文献