可再生羧甲基壳聚糖树脂的制备及对Eu(Ⅲ)离子吸附性能的研究

以羧甲基壳聚糖为原料，经戊二醛交联，制备阳离子型树脂。考察了其对稀土离子Eu^3 的吸附性能，探讨了溶液的酸度、初始离子浓度、反应时间及离子强度对该树脂吸附性能的影响；发现羧甲基壳聚糖经戊二醛交联制成的树脂对Eu3^ 有较强的吸附性能，可达到95％且吸附速度快，并且具有良好的使用性。     

交联壳聚糖树脂制备与吸附低浓度盐酸的研究

通过壳聚糖与铜离子作用得到模板壳聚糖，再用交联剂环氧氯丙烷交联后将铜离子洗脱制得交联壳聚糖树脂，研究了不同交联度的交联壳聚糖树脂的物理特性与吸附低浓度盐酸的特性。     

交联羧甲基壳聚糖树脂对稀土离子吸附性能研究

以羧甲基壳聚糖为原料，经戊二醛交联制备阳离子型树脂，考察了其对稀土离子La^3 、Nd^3 、Sm^3 、Lu^3 吸附性能。探讨了溶液的酸度、体系温度、初始离子浓度及离子强度对该树脂吸附性能的影响；发现羧甲基壳聚糖经戊二醛交联制成的树脂对稀土离子有较强的吸附性，最高吸附率可达99％以上，并且具有良好的重复使用性；其吸附性为满足Langmuir或Freumdilich等温式。     

壳聚糖锰配合物对尿素的吸附性能研究

研究了壳聚糖锰配合物对尿素的吸附,探讨了反应时间、反应温度、酸度和反应物的起始浓度等对吸附的影响,获得了壳聚糖锰配合物对尿素吸附的最佳条件,研究发现壳聚糖锰配合物对尿素具有很好的吸附能力.     

改性壳聚糖对铜离子的吸附研究

本文针对壳聚糖是否拥有对铜离子吸附能力,联系实际溶液环境,探讨了各种不同条件:溶液的p H值,起始浓度,温度,壳聚糖的用量,壳聚糖颗粒的大小等方面研究了它们对吸附的影响,确定了其吸附的最佳条件。通过利用柠檬酸三钠和环氧氯丙烷依次对壳聚糖进行离子和共价键交联,制成改性壳聚糖,利用改性壳聚糖完成对铜离子的吸附实验,得出不同实验条件下改性壳聚糖的吸附能力强弱,并由此找出最佳反应条件。通过数据拟合,得出改性壳聚糖对铜离子的吸附效果并提出建议。结果表明改性壳聚糖拥有对铜离子的吸附作用,但吸附效果并不完全。改性壳聚糖对铜离子的最大吸附容量为4.37868 mg/g,吸附常数为0.00476。     

球形印迹交联壳聚糖聚合物的制备及其对尿素的吸附性能研究

采用乳液聚合法制备了球形尿素-壳聚糖分子印迹聚合物。通过正交试验优化了印迹聚合物的制备条件:在乙酸体积分数为2%,戊二醛用量为1 mL,转速为900 r/min,模板分子用量为3 g的条件下制备的印迹聚合物对尿素的吸附量为7.16 mg/g,非印迹聚合物对尿素的吸附量为3.84 mg/g。聚合物的红外图谱研究表明,戊二醛参与了交联反应且模板分子尿素被印迹在聚合物上,聚合物经洗脱后模板分子被基本除去。分子印迹聚合物表面具有均一选择性的吸附位点,最大表观吸附量为9.69 mg/g。     

交联壳聚糖树脂对阴离子染料吸附性能的研究

以甲醛-环氧氯丙烷为交联剂,采用反向悬浮法制备了交联壳聚糖树脂(CCTSR).研究了染料溶液初始浓度、时间、pH值和温度等因素对壳聚糖树脂吸附C.I.活性19、C.L活性蓝21、酸性橙II的影响,并探讨了交联壳聚糖树脂对3种阴离子染料的吸附规律.实验结果表明:适宜的酸性条件及较高的染液初始浓度有利于提高CCTSR对三种染料离子的吸附性能;而温度对染料吸附呈现不同的影响趋势.交联壳聚糖树脂对这3种染料的吸附符合Langmuir吸附等温式和Freundlich吸附等温式,吸附动力学模型可以用准二级速率方程来描述.     

壳聚糖金属离子印迹树脂的吸附模型

引　言壳聚糖由于具有优良的生物相容性、金属离子螯合性等性能而在食品、医药及废水处理中有重要用途[1] .壳聚糖无毒 ,对重金属离子有很强的螯合性 ,Ｏｎｓｏｙｅｎ等将可溶性壳聚糖用于重金属离子的吸附[2 ] .但采用片状或凝胶状壳聚糖用于工业废水处理时 ,壳聚糖难于回收 ,成本高 .Ｋａｗａｍｕｒａ等报告了交联壳聚糖树脂用于重金属离子的吸附[3] ,交联壳聚糖机械性能好 ,可重复使用 ,但交联后金属离子吸附容量下降很大 ,这是由于许多壳聚糖分子上吸附的活性基团如ＮＨ2 被交联所致 .为解决该问题 ,日本Ｉｏｕｎｅ和国内曲荣君采用“模…     

壳聚糖印迹树脂对铜的吸附性能研究

以壳聚糖为基质,Cu2+离子为模板剂,采用分子印迹技术,制备壳聚糖印迹树脂Cu-CTS,研究其对Cu2+的吸附性能。吸附优化结果表明,Cu2+溶液的初始浓度为200 mg/L,p H=5.5,吸附剂投加量为0.05 g,振荡吸附3 h,吸附量可达88.60 mg/g。Cu-CTS较NI-CTS的吸附能力提高了37.63%,可用于水体中Cu2+的富集和分离。     

天然高分子吸附剂研究：Ⅹ.交联壳聚糖树脂的制备及其吸附性能

采用先使壳聚糖与过渡金属离子形成配合物，然后在稀碱条件下用环氧氯丙烷进行交联，最后用稀酸除去金属离子的方法。合成了一系列具有不同交联度的壳聚糖树脂，研究了该系列树脂对Ｃｕ＾２＋，Ｎｉ＾２＋的静态吸附性能。结果表明，上述树脂对两种离子均具有良好的吸附能力，其对Ｃｕ＾２＋，Ｎｉ＾２＋的最佳吸附量可分别达２．６２ｍｍｏｌ／ｇ和２．４９ｍｍｏｌ／ｇ，同时发现，Ｃｕ＾２＋在树脂的合成中起到了一种“模板剂”的     

黄金冶炼厂尾液中的氰化物回收

研究了功能性离子树脂吸附回收黄金冶炼厂的提金尾液中氰化物的技术,静态实验考察了离子转型剂类型与加入量、树脂加入量以及溶液中C l-的累积对吸附过程的影响,动态实验研究了溶液流速对吸附的影响,结果表明经过离子转型、树脂吸附,提金尾液中90%氰化物可以被有效回收,铜的回收率也可以达到80%以上。     

一种高吸水树脂对电镀废水中铜离子的吸附研究

以废弃聚乙烯(PE)塑料与具有亲水性基团的丙烯酸(AA)及其盐接枝共聚合成一种高吸水性树脂,并将所得高吸水树脂用于溶液中Cu2+的吸附。通过分光光度法研究了树脂去除水溶液中Cu2+的情况,考察了起始pH、树脂用量、金属离子起始浓度和吸附时间对金属离子去除率的影响。结果表明,该树脂对Cu2+具有较强的吸附性能。树脂初期吸附速率大,吸附达到平衡时的接触时间为30 min。当溶液pH为7.0,Cu2+初始浓度为25 mg/L,树脂用量在8 g/L时,树脂对Cu2+的去除率可达95.0%以上。     

Coordination of Cu(II) and Ni(II) in polymers imprinted so as to optimize amine chelate formation

Molecular imprinting has become an established technique. However, little was done on direct investigation of the sorbents produced. In the present work, en ESR method was used for the investigation of the complex formation processes within the sorbents imprinted with copper(II) and nickel(II). The sorbents were synthesized from a mixture of linear low molecular weight polyethyleneimine oligomers. The composition, structure and distribution of complexes in the resin phase were investigated. The effects of the synthesis conditions, loading degree and water content were examined. The presence of certain copper complexes was found to be a convenient characteristic of the imprinting efficiency. The optimum synthesis conditions for obtaining sorbents imprinted with copper(II) or nickel(II) were identified. The imprinting results in the improvement of the stability of the complexes and the selectivity and working capacity of the sorbents. The imprinted samples are also characterized by a more even distribution of chelating sites. The synthesis conditions and loading by ions allow for the regulation of the ratio between individual complexes and magnetic associates in the resin phase. This is a critical point on the future use of the metal containing imprinted sorbents as catalysts.     

包醛酶淀粉吸附性能的研究

本文介绍了肠溶制剂包醛酶淀粉在尿素溶液中的吸附性能，以及溶液的浓度，ｐＨ值，吸附剂用量对吸附性能的影响。结果表明，包醛酶淀粉的吸附速度大于包醛氧淀粉，吸附容量大约是包醛氧淀粉的４倍，当溶液ｐＨ〈４时，随着ｐＨ值减小，对溶液中尿素的吸附力迅速降低。     

Tyrosine imprinted polymer beads with different functional monomers via seed swelling and suspension polymerization

Molecularly imprinted polymers (MIPs) in bead form were prepared by seed swelling and suspension polymerization with trimethylolpropane trimethacrylate (TRIM) as crosslinker and tyrosine as template. The appearance of the beads was found to be greatly influenced by the concentration of polyvinyl alcohol (PVA) used as dispersant and the ratio of water to TRIM (W/T) during polymerization. When W/T was 46:1 (V/V) and the concentration of PVA‐water solution was 4.6 (%m/m), the result was more desirable size distribution with fewer misshapen beads. A series of imprinted polymers with methacrylic acid (MAA), acrylamide (AM), 2‐vinylpyridine (VP) and 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) as functional monomers (FM), respectively, were prepared, where the molar ratio of tyrosine, FM and TRIM was chosen as 1:16:17. The molecule adsorbing and selecting analysis of the polymers showed that although all the imprinted polymers adsorbed the templates following the rule of Langmuir and exhibited an obvious molecule selecting capability compared with their control polymers (CP), the adsorbing constant and the separating factor were much different when the functional monomers varied. AMPS worked better than the other FM in the present work with a higher value of asymptotic maximum solid phase concentration (0.282 mol/kg), adsorbing constant (198.81/mol), and a larger separating factor (1.93) when phenylalanine was used as the competitive molecule.     

Studies of syntheses and adsorption properties of chelating resin from thiourea and formaldehyde

Chelating resins are useful substances in industry because of their extraordinary adsorption properties for specific metal ions. In this study, a new type of chelating resin is synthesized simply by reaction between thiourea and formaldehyde. The synthetic conditions and the structure of the product are approached and the adsorbing capacities for 11 metal ions, adsorbing rates, and selectivities investigated. The results of the experiments show that the resin has high adsorbing capacities for Ag(I): 13.1 mmol/g, and for Au(III): 6.95 mmol/g. Adsorbing rates are close to 100% in dilute solution. Isothermal adsorbing study reveals that the adsorption is monomolecular layer adsorption process. It is hopeful for the resin to be used for concentrating and retrieving Ag(I) and Au(III) ions from their dilute solutions in industry. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 3127–3132, 2001     

Aqueous phase hydrogenolysis of glucose to 1,2-propanediol over copper catalysts supported by sulfated spherical carbon

Aqueous phase hydrogenolysis of glucose was carried out over copper catalysts supported by sulfated spherical carbon for selective production of 1,2-propanediol. The sulfated carbon shows higher acidity by sulfation of its resin precursor than unsulfated or commercial ones. By changing copper loading, the hydrogenolysis capability and the acidity of catalysts were modified to suitable extents, which can optimize the selectivity to 1,2-propanediol. At a moderate copper loading, 5.0Cu/s-AC catalyst has the highest yield of 1,2-propanediol. This catalyst has a lifetime of over 300 h. However, its stability is required to be further improved.     

大孔树脂吸附法处理含硝基苯类工业废水试验研究

为获得大孔树脂吸附硝基苯类化合物的具体参数和脱附条件,以及硝基苯类化合物的回收率,通过大孔树脂吸附处理含硝基苯类工业废水的试验研究,以及对脱附液的后处理研究,结果表明:XSA-6大孔树脂处理含硝基苯类工业废水的最佳工艺条件:吸附温度为20℃,流速为3.0 BV/h,pH值为1,废水处理量为28 BV.脱附温度为40～ ...     

Decolorisation of H-acid manufacturing process wastewater by anion exchange resin

Anion exchange resin was employed to examine the feasibility to treat the H-acid manufacturing wastewater by column experiment. Besides the acidity recovery, the decoloring efficiency and chemical oxygen demand (COD) removal efficiency of the anion exchange resin was investigated in the experiments. The results revealed that the anion exchange resin was able to remove colourful pollutants and degrade a part of COD effectively, and at the same time reserve acidity in the wastewater solution. The resin regenerated by a 10% NaCl aqueous solution had the same ability to discolour and remove the COD from the wastewater as the new resin had. The resin regenerated by 3% w/w NaCl aqueous solution, which was the same concentration as seawater, also had, to some extent, the same effect on decolorisation and the removal of COD; however, its colour and COD removal performance was not as efficient as the resin regenerated by 10% w/w NaCl and the new resin. H-acid (0.25%) was also successfully recovered from the regenerating solutions.     

强酸离子交换纤维对碱性氨基酸的吸附性能研究

研究了强酸离子交换纤维对赖氨酸的吸附、解吸性能。静态吸附动力学实验表明,纤维对赖氨酸的吸附速度明显快于732树脂。穿透曲线结果表明,纤维的吸附量与上柱液浓度、流速、pH值有关。用氨水可将吸附的赖氨酸迅速解吸。