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| 1 | 离子交换树脂吸附净化工业废液研究进展显示文摘介绍在不同温度、pH值、树脂用量及离子浓度等条件下,离子交换树脂对工业废液中某些特定成分的吸附效果及影响因素。综述了近年来国内外针对几种离子及有机物的吸附树脂、吸附条件及吸附效果,评述了现存问题。最后对离子交换树脂研究进展做出了总结并且展望了离子交换树脂吸附工业废液进一步的前景与方向。 | 赵玉 赵德智 王德慧 王珂 | 2018 | 应用化工2018，47，3： | 6 |
| 2 | Effect of dissolved organic matter on nitrate-nitrogen removal by anion exchange resin and kinetics studies显示文摘The effects of dissolved organic matter (DOM) on the removal of nitrate-nitrogen from the model contaminated water have been investigated utilizing the strong base anion exchange resins. With the increase of gallic acid concentration from 0 to 400 mg/L, the adsorption amount of nitrate-nitrogen on the commercial resins, including D201, Purolite A 300 (A300) and Purolite A 520E (A520E), would significantly decrease. However, the presence of tannin acid has little impact on nitrate-nitrogen adsorption on them. Compared to D201 and A300 resins, A520E resin exhibited more preferable adsorption ability toward nitrate-nitrogen in the presence of competing organic molecules, such as gallic acid and tannin acid at greater levels in aqueous solution. Attractively, the equilibrium data showed that the adsorption isotherm of nitrate-nitrogen on A520E resin was in good agreement with Langmuir and Freundlich equations. The rate parameters for the intra particle diffusion have been estimated for the different initial concentrations. In batch adsorption processes, nitrate-nitrogen diffuse in porous adsorbent and rate process usually depends on t 1/2 rather than the contact time. The pseudo first- and the second-order kinetic models fit better for nitrate-nitrogen adsorption onto A520E resin. The observations reported herein illustrated that A520E resin will be an excellent adsorbent for enhanced removal of nitrate-nitrogen from contaminated groundwater. | Haiou Song Zhijian Yao Mengqiao Wang Jinnan Wang Zhaolian Zhu Aimin Li | 2013 | Journal of Environmental Sciences2013，25，1： | 3 |
| 3 | A novel and simple pathway to synthesis of porous polyurea absorbent and its tests on dye adsorption and desorption显示文摘A novel one-step protocol for the preparation of porous polyurea material(PPU) through precipitation polymerization of toluene diisocynate(TDI) is presented.The process is based on step polymerization of one single monomer,TDI,with water in water-acetone mixed solvent.PPU is obtained without need for any porogen or additives,and no any chemical modification on the outcome polymer is necessary.The morphology,pore size and size distribution of PPU are characterized by scanning electron microscope and BET nitrogen adsorption.Taking acid fuchsine(AF) and Congo Red as dye examples in wastewaters, their adsorption on,desorption from PPU and the reusability of PPU were tested.Experimental conditions for AF adsorption were optimized with regard to pH,adsorption time,AF concentration and amount of PPU.Results demonstrate that the as-prepared PPU is of high performance in dyes adsorption and recycled use.This work presents therefore a novel and attractive candidate for removal of anionic dyes from wastewaters. | Shu-Sheng Li Xiang-Zheng Kong Xu-Bao Jiang Xiao-Li Zhu | 2013 | Chinese Chemical Letters2013，24，4： | 2 |
| 4 | 一种自制选择性离子交换树脂脱除饮用水中的硝酸盐显示文摘我国部分地区饮用水源中的硝酸盐污染严重,传统给水处理工艺去除效率低。采用自制大孔型阴离子树脂进行静态和动态实验。结果表明,该离子交换树脂吸附速率由颗粒内扩散速率控制,10 min时达去除总量的50%,30 min达吸附平衡;固定床最佳高径比为20,共存离子影响了NO_3^-的去除,其影响大小为:SO_4^(2-)>Cl^->HCO_3^-;树脂在较高浓度阴离子的干扰下能较好地去除硝酸盐,柱利用率达68.75%~84.65%。负载柱仅消耗18 BV再生液使解吸效率达99%,大大降低了再生液体积和成本。表明该树脂具有良好的选择性和再生性。 | 朱菁 任勇翔 叶媛媛 胡轲 | 2016 | 水处理技术2016，42，1： | 1 |
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