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Adsorption of surfactants onto acrylic ester resins with different pore size distribution

Science china Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3.LI Aimin1,3.CAI Jianguo1,3.MENG Guanhua1,3.& ZHANG Quanxing1,3.1. State Key Laboratory of Pollution control and resource reuse,School of the Environment,{3. University,{3. 210093.china 2. {3. College of Chemical technology,{3. 210048,china 3. jiangsu engineering & technology research center for organic toxicant control and resource reuse,nanjing 21003.,china State Key Laboratory of Pollution control and resource reuse School of the Environment Nanjing University Nanjing China nanjing College of Chemical technology Nanjing China jiangsu engineering & technology {3. center for organic toxicant control and resource reuse Nanjing China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 3.# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

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RECOVERY OF p-AMINOPHENOL (PAP) FROM AQUEOUS SOLUTION BY HYPER-CROSS-LINKED RESIN AND ITS USE FOR WASTEWATER TREATMENT

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Chinese Journal of Reactive Polymers 2008年第Z1期 18-28页

作者： ZHANG Haiyun1,2 LI Aimin1,3.1. School of the Environment, and State Key Laboratory of Pollution control and resource reuse, {3. University, {3. 210093. china 2. Department of the Environmental engineering, {3. Institute of technology, {3. 211167, china 3. engineering technology {13. center of organic Pollutants control and resource reuse of jiangsu Province, nanjing 21003., china

p-Aminophenol （PAP）, a typical amphoteric compound, has been widely used as raw chemical material and important intermediate in various fields. To study on the recovery of PAP, an experimental comparison of the adsorption and desorption properties of PAP onto three types of hyper-cross-linked resins in aqueous solutions was performed. This paper focuses on the static equilibrium adsorption and desorption behaviors, the adsorption thermodynamics, the column dynamic adsorption and desorption, and other influencing factors of adsorption, such as temperature and pH values. All the isothermal data fit well to the Freundlich model. The capacity of equilibrium adsorption for PAP on NG-10 is the highest within the temperature range 288K3.8K,which may greatly contribute to the advantage in specific surface area, especially the micropore area, of the adsorbent. While in the desorption experiments, NG-9 achieved relative well regeneration efficiency whether by ethanol or by 4% hydrochloric acid. Furthermore, the results of column tests and field applications were also proved that NG-9 was an effective sorbent for the reclamation PAP from wastewater.

关键词： Adsorption p-Aminophenol Hyper-cross-linked resin Recovery.

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Microwave photocatalytic degradation of Rhodamine B using TiO_2 supported on activated carbon:Mechanism implication

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Journal of Environmental Sciences 2009年第2期21卷 268-272页

作者： HE Zhong,YANG Shaogui,JU Yongming,SUN Cheng State Key Laboratory of Pollution control and resource reuse,School of the Environment,{3. University,{3. 210093.china. State Key Laboratory of Pollution control and resource reuse School of the Environment Nanjing University Nanjing 210093 China

The photocatalytic degradation of Rhodamine B （RhB） was carried out using TiO2 supported on activated carbon （TiO2-AC） under microwave irradiation. Composite catalyst TiO2-AC was prepared and characterized using X-ray diffraction （XRD）, transmission electron microscopy （TEM） and Brunauer-Emmett-Teller （BET）. In the process of microwave-enhanced photocatalysis （MPC）, RhB （3. mg/L） was almost completely decoloured in 10 min, and the mineralization efficiency was 96.0% in 20 min. The reaction rate constant of RhB in MPC using TiO2-AC by pseudo first-order reaction kinetics was 4.16 times of that using Degussa P25. Additionally, according to gas chromatography/mass spectrometry （GC/MS） and liquid chromatography/mass spectrometry （LC/MS） identification, the major intermediates of RhB in MPC included two kinds of N-de-ethylation intermediates （N,N-diethyl-N＇-ethyl-rhodamine （DER））, oxalic acid, malonic acid, snccinic acid, and phthalic acid, maleic acid, 3.nitrobenzoic acid, and so on. The degradation of RhB in MPC was mainly attributed to the destruction of the conjugated structure, and then the intermediates transformed to acid molecules which were mineralized to water and carbon dioxide.

关键词： microwave photocatalytic WiO2, activated carbon Rhodamine B degradation mechanism

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氧化物涂层砂对天然水中有机物的去除

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上海环境科学 2002年第4期21卷 202-204,209页

作者：高乃云李富生汤浅晶同济大学污染控制与资源化研究国家重点实验室上海200092 日本国立岐阜大学工学部土木工学科日本国立岐阜大学流域环境研究中心

氧化物涂层砂,比表面积增加,吸附容量增大,使石英砂表面电荷的带电性质改变,有利于水中天然有机物的去除。对3.不同氧化物涂层砂和未涂层砂对天然有机物的去除性能进行了比较实验,证明涂铝砂和B型涂铁砂对水中天然有机物的去除效果优于... 详细信息

氧化物涂层砂,比表面积增加,吸附容量增大,使石英砂表面电荷的带电性质改变,有利于水中天然有机物的去除。对3.不同氧化物涂层砂和未涂层砂对天然有机物的去除性能进行了比较实验,证明涂铝砂和B型涂铁砂对水中天然有机物的去除效果优于A型涂铁砂;而3.涂层砂均优于未涂层砂。

关键词：氧化物涂层砂天然水有机物过滤溶解有机碳紫外吸光度给水处理

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