大孔吸附树脂处理含磺胺废水的研究

利用大孔吸附树脂处理含磺胺废水。实验表明，DRHⅢ树脂对磺胺具有良好的吸附－解吸效果。原废水中磺胺浓度约为17.2g/L,COD约为13750mg/L，经树脂吸附处理后，废水中COD去除率约86％，磺胺的吸附率88．2％，树脂的解吸率为97．5％，磺胺的回收率约86．0％，其纯度达99．8％。在废水有效处理的同时实现了废物资源化，具有良好的环境效益和较高的经济效益。     

大孔树脂对大豆乳清废水中异黄酮的吸附特性研究

通过比较10种大孔吸附树脂对大豆乳清中异黄酮的吸附特性发现，弱极性和非极性吸附树脂有利于大豆乳清中异黄酮的吸附．研究结果表明，D312和AB-8树脂对异黄酮的吸附量大，解吸容易、可以应用于大豆乳清废水资源化工艺之中．适宜的操作条件为温度20℃左右、pH值7．5左右．     

大孔吸附树脂的吸附机理

大孔吸附树脂(macroprous adsorption resin, MAR)是近几十年发展起来的一种具有多孔立体结构、人工合成的有机高分子聚合物。由于其特殊的理化性质和吸附性能,已被广泛应用于化学、医药、环保和食品等领域。本文介绍了近年来国内外对大孔吸附树脂在吸附机理研究方面的进展,重点介绍了不同温度条件下大孔吸附树脂对靶标分子的吸附热力学行为模式,靶标分子在大孔吸附树脂表面及孔内的吸附扩散行为模式。此外,大孔吸附树脂性能参数和靶标分子结构参数之间构效关系也对其吸附选择性规律具有重要的影响。因此,大孔吸附树脂与底物间构效关系的匹配程度及其对选择性的影响是大孔吸附树脂分离理论研究的核心。本文最后介绍了可以准确客观描述吸附过程并具有一定使用范围的大孔吸附树脂吸附模型的建立和评价。     

大孔树脂吸附苯肼的静态相平衡研究

比较3种了大孔吸附树脂对废水中苯肼的吸附能力，证明Hz-841大孔树脂的吸附效果最佳．根据实验建立了Hz-841大孔树脂静态吸附容量与温度、苯肼浓度、以及离子强度间的相平衡关系．     

从柑桔加工废水中吸附回收橙皮苷

本文研究了用Ｄ－２５４树脂从柑桔加工废水中吸附回收橙皮苷的方法。在ｐＨ８．０，树脂：废水＝１：１００（Ｗ／Ｖ）时，Ｄ—２５４树脂可吸附废水中９６．３％的橙皮苷，被吸附的橙皮苷用ｐＨ５．５，９５％的乙醇洗脱，其收率为９２．６％，产品纯度达到９１．４％。     

树脂吸附法回收头孢氨苄工艺研究

为了从头孢氨苄结晶废母液中回收产品,采用大孔树脂吸附法对回收工艺进行了研究,比较了HZ818,HZ832,HZ801,HZ816,D4020,X-5等6种大孔吸附树脂对头孢氨苄的吸附性能,筛选出了高吸附性能的树脂,同时对头孢氨苄在HZ816吸附柱上的动态吸附-解吸过程进行了研究.其结果是:大孔吸附树脂HZ816能更好地分离回收头孢氨苄,其吸附量在45.4mg/mL左右,40％的乙醇(pH 2.0)可以将吸附在树脂柱上的头孢氨苄有效解吸,解吸率达94.5％,解吸液经结晶、干燥等后续处理可得到符合中国药典要求的产品.大孔吸附树脂HZ816是回收头孢氨苄的一种理想的吸附剂,该工艺简捷,具有很好的工业化前景.     

聚丙烯加热改性制备大孔吸附树脂的工艺及其应用

This article reported the preparation of macro porous resin by heating polyproplyene and improving its property. The result showed that macro porous resin with good quality and big soil adsorption rote can be prepared when the ration of polypmplyene to soybean salad oil is 1 : 2, the highest heating temperture is 250℃, time of homothermal agitation is 20min and the rote of cooling is 2℃/min.The resin can effectively adsorb waste grease in restaurant wastewater. After removing grease, wastewater is treated with cogulant deposition. CODcr descend to 83mg/l from 790mg/l, which can reach the national discharge standards.     

树脂吸附法深度处理焦化废水

将树脂吸附剂应用于焦化废水的深度处理,考察了温度、投加量、初始pH、时间和流速对CODcr和色度去除效果的影响.静态吸附实验确定了最佳吸附树脂为NDA-99型树脂,最佳投加量为3.00g/L,无需调节pH,最佳温度为303K,吸附等温线满足Freundlich方程.通过动态实验确定了最适宜工艺条件为:流速20BV/h,单柱废水处理量为200BV/批;处理后废水中CODcr浓度从199mg/L降到100mg/L以下,色度从98倍降到50倍以下.使用8％的NaOH溶液脱附再生,最佳脱附流速为5BV/h.     

大孔强碱性阴离子交换树脂吸附间甲酚的研究

本文探讨了D202大孔强碱性阴离子交换树脂对间甲酚的吸附。经试验确定,吸附速度为4～6BV/hr,脱附剂为丙酮,脱附速度为0.5～1.0BV/hr可以获得令人满意的结果。     

大孔吸附树脂对天麻素的吸附与分离特性的研究

研究了AB 8、NKA 9和S 83种大孔吸附树脂对中药天麻提取液中有效成分天麻素的吸附与分离特性。结果表明,NKA 9和S 8树脂对天麻素具有较好的吸附和解吸特性。其中经NKA-9树脂纯化的天麻素纯度为16.4%,比粗提物的天麻素纯度提高了1倍多。     

Chitosan as a biosorbent for adsorption of iron (II) from fracking wastewater

In this work, porous chitosan (CS) was investigated as a biosorbent for the removal of iron (II) from the synthetic fracking wastewater. The underlying problem with the production water from fracking industries is that it contains iron (II) up to 55 mg/L, which needs to be eliminated. Porous CS had a specific surface area of 1.05 m²/g with the average pore diameter of 319 A, as determined by using Brunauer‐Emmett‐Teller surface area analysis. The kinetics, isotherms, and thermodynamic analysis confirm that the porous CS can be a potential candidate for iron (II) removal. Both the pseudo‐first‐order model and pseudo‐second‐order model have good fit on iron (II) adsorption with the porous CS. Kinetic studies revealed that the CS‐iron (II) adsorption system was controlled by intraparticle diffusion. The monolayer adsorption capacity of the porous CS from Langmuir model was found to be 51.81 mg/g. The experimental data were fitted against common adsorption isotherms and yielded excellent fits in the following order: Langmuir > Temkin > Freundlich > Dubinin‐Radushkevich isotherms. Thermodynamic studies revealed that the adsorption of iron (II) onto porous CS was feasible and spontaneous. The adsorption process is endothermic, and the entropy is the driving force.     

DH-2树脂对镝的吸附及机理

研究了镝离子在HD-2树脂上的吸附行为。在HAc-NaAc体系pH=6.20时吸附最佳,测得静态饱和吸附容量为356mg/g(树脂),用0.1~2.0 mol/L HC l可定量洗脱,表观速率常数k198=1.16×105s-1,表观活化能Ea=16.1kJ/mol。等温吸附服从Freun ilich经验式,吸附热力学参数△H=16.5kJ/mol,△S=58.2 J/(mol.K),△G298=-0.859kJ/mol。用化学和红外光谱等方法讨论了吸附机理。     

大孔硫脲螯合树脂吸附银的研究

本文研究了大孔硫脲螯合树脂对银(I)的吸附行为.结果表明:硫脲树脂对银离子的吸附在pH5.0 的HNO3-柠檬酸钠介质中最佳,静态饱和吸附容量为402mg·g-1树脂,用5～10%硫脲-1.0mol·L-1HCl溶液作解吸剂,二次累计解吸率达到92%;等温吸附服从Freundlich经验式;表观吸附速率常数k298=1.64×10-5s-1;吸附反应的△H=41.6kJ·mol-1;吸附物中树脂功能基与Ag(I)的配位比约为1∶ 1.     

Separation of capsaicin from capsaicinoids by macroporous resin adsorption chromatography

The aim of present study is to develop an efficient and low‐cost method for capsaicin production isolated from capsaicinoids by macroporous resin adsorption chromatography. HZ816 resin has shown the best adsorption and desorption capacities for capsaicin among other resins. To optimize the operating parameters for separation, initial concentration, diameter‐to‐height ratio, mobile phase ratio, and crystallization method were investigated. When capsaicinoids solution (5 g/L) was loaded onto the column (diameter‐to‐height ratio = 1:12) with ethanol/1% w/w NaOH (4:6, v/v) as the mobile phase, capsaicin was purified most effectively. By using acid neutralization as the crystallization method, the purity of capsaicin improved from 90.3 to 99.5% with 82.3% yield. In conclusion, this study provides a simple and low‐cost method for the industrial‐scale production of high‐purity capsaicin.     

胶原-单宁树脂的制备及其对水溶液中UO2+2的吸附特性研究

以天然牛皮为原料,经胃蛋白酶处理制得水解胶原;通过胶原-黑荆树单宁-醛反应制备了胶原-单宁树脂(C-TR)吸附材料,并表征了材料的形貌,测定了材料的比表面积、热变形温度等性质。系统研究了C-TR对水溶液中UO22 的吸附特性。结果表明,C-TR对UO22 有较强的吸附能力。当温度为303K、pH=5.0、UO22 的初始浓度2.5mmol.L-1时,吸附容量达到1.49mmolU/g。升高温度,平衡吸附量增大。pH对吸附容量的影响较大,适宜的pH范围为5.0-6.0。C-TR对UO22 的吸附平衡符合Freundlich方程。吸附动力学可用拟二级速度方程来描述。C-TR对UO22 的吸附基本不受NaCl影响,该吸附材料可望用于海水中铀的富集和分离。     

离子交换树脂固态胺复合材料的制备、表征及CO2吸附

以离子交换树脂（D001）为载体,四乙烯五胺（TEPA）为改性剂,采用三种不同的方法制备了一系列固态胺吸附剂。采用N₂吸附-脱附、傅里叶变换红外光谱（FT-IR）、热重分析（TGA）等手段对吸附剂进行表征。在固定床反应器中考察了TEPA负载量、吸附温度、进气流量和CO₂分压等因素对CO₂吸附性能的影响。结果表明,配位法制得的固态胺吸附剂分散性和稳定性较好,且在TEPA负载量为40%,吸附温度为65℃,进气流量为40 mL/min时有最大CO₂吸附量达4 mmol/g。经过10次吸附-脱附循环实验后,CO₂吸附量下降3.98%。热力学、动力学研究结果表明,CO₂吸附是物理吸附和化学吸附的结果。     

Removal of anionic and cationic dyes from wastewater by adsorption using multiwall carbon nanotubes

This paper evaluated the efficiency and reusability of multiwall carbon nanotubes (MWNTs) on removal of cationic and anionic dyes under effect of pH, dose of MWNTs and concentration of dyes. The characterization of MWNTs is characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), Raman spectra and BET (Brunauer, Emmett and Teller) surface area. SEM and TEM analyses showed that MWNTs had size within nano scale range of 10–50 nm. The experimental results indicated that the efficiency of removal of MWNTs increase under condition of normal pH, at contact time 60 min with agitation speed 240 rpm and initial concentration of dyes 10 mg/l. Under these optimal conditions, the removal reached 98.7% and 97.2% for anionic dyes and cationic dyes, respectively. For economic use, MWNTs can be used more than one time where the same experiments with the already used MWNTs was repeated and it was found that the percent removal is almost the same.     

Sequential separation of Cu(II)/Ni(II)/Fe(II) from strong-acidic pickling wastewater with a two-stage process based on a bi-pyridine chelating resin

A self-synthesized bi-pyridine chelating resin (PAPY) could separate Cu(II)/Ni(II)/Fe(II) sequentially from strong-acidic pickling wastewater by a two-stage pH-adjusted process, in which Cu(II), Ni(II), and Fe(II) were successively preferred by PAPY. In the first stage (pH 1.0), the separation factor of Cu(II) over Ni(II) reached 61.43 in Cu(II)-Ni(II)-Fe(II) systems. In the second stage (pH 2.0), the separation factor of Ni(II) over Fe(II) reached 92.82 in Ni(II)-Fe(II) systems. Emphasis was placed on the selective separation of Cu(II) and Ni(II) in the first-stage. The adsorption amounts of Cu(II) onto PAPY were 1.2 mmol/g in the first stage, while those of Ni(II) and Fe(II) were lower than 0.3 mmol/g. Cu(II) adsorption was hardly affected by Ni(II) with the presence of dense Fe(II), but Cu(II) inhibited Ni(II) adsorption strongly. Part of preloaded Ni(II) could be replaced by Cu(II) based on the replacement effect. Compared with the absence of Fe(II), dense Fe(II) could obviously enhance the separation of Cu(II)-Ni(II). More than 95.0% of Cu(II) could be removed in the former 240 BV (BV for bed volume of the adsorbent) in the fixed-bed adsorption column process with the flow rate of 2.5 BV/h. As proved by X-ray photoelectron spectrometry (XPS) and density functional theory (DFT) analyses, Cu(II) exerted a much stronger deprotonation and chelation ability toward PAPY than Ni(II) and Fe(II). Thus, the work shows a great potential in the separation and purification of heavy metal resources from strong-acidic pickling wastewaters.     

Purification of uranium-containing wastewater by adsorption: a review of research on resin materials

Journal of Radioanalytical and Nuclear Chemistry - Nuclear energy has been developed and used on a large scale as a clean energy source. Since the increasing growth of the worldwide nuclear...