| 海藻酸钠-氢氧化镧改性Y型分子筛颗粒除氟研究 |
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| 引用本文： | 卞晓彤,邱兆富,杨骥,严瑞琪,吕树光. 海藻酸钠-氢氧化镧改性Y型分子筛颗粒除氟研究[J]. 无机盐工业, 2020, 52(12): 86-91. DOI: 10.11962/1006-4990.2020-0059 |
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| 作者姓名： | 卞晓彤 邱兆富 杨骥 严瑞琪 吕树光 |
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| 作者单位： | 华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助(222201817009);国家环境保护公益性行业科研专项(201309021) |
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| 摘 要： | 为解决除氟吸附剂分离困难、有效成分流失等问题,以海藻酸钠（SA）与氢氧化镧改性Y型分子筛（LHMS）为原料,采用滴球法制备了SA@LHMS颗粒吸附剂,并采用模拟废水对其进行了除氟研究。通过正交实验确定了吸附剂最佳制备条件,并通过间歇吸附实验测试了吸附剂投加量、pH、共存离子等因素对吸附的影响,探究了吸附速率、吸附等温线等吸附性能。结果表明,SA@LHMS吸附速率曲线符合拟二级反应速率方程;吸附等温线符合Ⅱ型等温线,为多分子层吸附;初始pH（3~12）对吸附效果没有显著影响;高浓度共存阴离子（50 mg/L）对吸附过程有一定抑制;1 mol/L和2 mol/L氢氧化钠溶液对SA@LHMS再生效果较好,经3次再生仍然保留较高的吸附能力。SA@LHMS颗粒表面和截面形态以及吸附前后颗粒的表面形态差异明显;吸附前后颗粒表面能谱（EDS）分析以及红外光谱（FT-IR）分析结果显示,吸附过程中溶液中的氟离子（F-）与颗粒表面及内部的羟基（—OH）发生配体交换。
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| 关 键 词： | 海藻酸钠 颗粒吸附剂 除氟 氢氧化镧 Y型分子筛 |
Study on fluoride removal by modified Y zeolite particles with sodium alginate-lanthanum hydroxide |
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| Bian Xiaotong,Qiu Zhaofu,Yang Ji,Yan Ruiqi,Lü Shuguang. Study on fluoride removal by modified Y zeolite particles with sodium alginate-lanthanum hydroxide[J]. Inorganic Chemicals Industry, 2020, 52(12): 86-91. DOI: 10.11962/1006-4990.2020-0059 |
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| Authors: | Bian Xiaotong Qiu Zhaofu Yang Ji Yan Ruiqi Lü Shuguang |
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| Affiliation: | State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School ofResources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China |
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| Abstract: | In order to solve the problem of the separation of defluorinated adsorbents and the loss of effective components,SA@LHMS adsorbents were prepared with sodium alginate（SA） and lanthanum hydroxide modified Y zeolite （LHMS） as raw materials.The optimum preparation conditions of adsorbent were determined by orthogonal experiment.The effect of factors,such as dosage of adsorbent,pH and co-existing ions etc.,was tested by batch adsorption experiment,and the adsorption performance of adsorption rate and adsorption isotherm was researched.The results showed that the adsorption rate curve of the SA@LHMS conformed to the second-order reaction rate equation.Adsorption isotherm conformed to the type Ⅱ isotherm,multilayer physical adsorption.The initial pH （3~12） had no significant effect on the adsorption effect.High concentration of co-existing anions （50 mg/L） inhibited the adsorption process.The regeneration effect of 1 mol/L and 2 mol/L NaOH solution on SA@LHMS was better,and SA@LHMS still retained a high adsorption capacity after three regeneration.The surface and cross section morphology of SA @LHMS as well as the surface morphology before and after adsorption were significantly different.EDS component analysis and FT-IR spectrum analysis before and after adsorption showed that ligand exchange occur-curred between F- and —OH on the surface and inside of particles during adsorption. |
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| Keywords: | sodium alginate particle adsorbent defluorination lanthanum hydroxide Y zeolite |
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