| 不同锌铝比水滑石的合成及其吸附脱除水中邻苯二甲酸性能 |
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| 引用本文： | 杨盈利,闫新龙,胡晓燕,周敏.不同锌铝比水滑石的合成及其吸附脱除水中邻苯二甲酸性能[J].无机化学学报,2017,33(10):1748-1756. |
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| 作者姓名： | 杨盈利 闫新龙 胡晓燕 周敏 |
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| 作者单位： | 中国矿业大学化工学院, 煤炭加工与高效洁净利用教育部重点实验室, 徐州 221116,中国矿业大学化工学院, 煤炭加工与高效洁净利用教育部重点实验室, 徐州 221116,中国矿业大学化工学院, 煤炭加工与高效洁净利用教育部重点实验室, 徐州 221116,中国矿业大学化工学院, 煤炭加工与高效洁净利用教育部重点实验室, 徐州 221116 |
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| 基金项目： | 国家自然科学基金（No.21606252，21506247），江苏省自然科学基金（No.BK20140182），江苏高校优势学科建设工程和中国矿业大学研究生教育教学改革研究与实践项目资助 |
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| 摘 要： | 采用共沉淀法合成一系列具有不同锌铝比的水滑石,并利用X射线衍射(XRD)、扫描电镜(SEM)、热重(TG)、氮气吸脱附及电感耦合等离子体质谱(ICP-MS)等表征手段对其结构与组成进行了测试。将上述水滑石材料用于吸附脱除水中邻苯二甲酸污染物,考察了不同锌铝比水滑石吸附邻苯二甲酸性能的差异。结果表明,在较低锌铝比时,随着水滑石锌铝比的增加,其对邻苯二甲酸的吸附量逐渐增大;当锌铝比较大时(6),随着锌铝比的增加,水滑石的吸附量基本保持不变。进一步选取锌铝比为6的水滑石,分别对其吸附邻苯二甲酸的动力学和热力学进行了研究,发现其吸附等温线和吸附动力学数据分别符合Freundlich等温吸附模型和准二级动力学模型,且循环吸附性能较好。
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| 关 键 词： | 水滑石(LDH) 锌铝比 吸附分离 邻苯二甲酸 吸附动力学 吸附热力学 |
| 收稿时间： | 2017/4/12 0:00:00 |
| 修稿时间： | 2017/8/30 0:00:00 |
Zn/Al Hydrotalcite with Different nZn/nAl Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour |
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| YANG Ying-Li,YAN Xin-Long,HU Xiao-Yan and ZHOU Min.Zn/Al Hydrotalcite with Different nZn/nAl Molar Ratios:Synthesis and Phthalic Acid Adsorption Behaviour[J].Chinese Journal of Inorganic Chemistry,2017,33(10):1748-1756. |
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| Authors: | YANG Ying-Li YAN Xin-Long HU Xiao-Yan and ZHOU Min |
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| Institution: | School of Chemical Engineering & Technology, Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China,School of Chemical Engineering & Technology, Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China,School of Chemical Engineering & Technology, Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China and School of Chemical Engineering & Technology, Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China |
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| Abstract: | Zn-Al layered double hydroxides (LDHs) with different Zn/Al molar ratios were prepare by co-preci-pitation method in this work. The structure and composition were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), thermogravimetric (TG), N2 adsorption-desorption and inductively coupled plasma mass spectrometry (ICP-MS). The adsorption properties of as-prepared Zn/Al hydrotalcites for phthalic acid removal from water were investigated and compared. Results show that the adsorption capacity increased with the increasing of Zn/Al molar ratios at low Zn/Al molar ratios for hydrotalcites. Further increasing the nZn/nAl molar ratios (>6), the adsorption capacity shows little change. Among those hydrotalcites, one sample with the highest adsorption capacity was selected and its adsorption kinetic and isotherm was further investigated. The adsorption equilibrium data were well described by Freundlich isotherm model and the kinetics followed a pseudo-second order kinetic equation/mechanism. In addition, the hydrotalcite can be reused at least 3 cycles without significant loss of adsorption capacity. |
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| Keywords: | hydrotalcite Zn/Al molar ratios adsorption and separation phthalic acid adsorption kinetics adsorption thermodynamics |
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