改性蛭石对荧光染料吸附性能研究
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摘要
以蛭石为原料,用十六烷基三甲基溴化铵(CTAB)改性蛭石,吡罗红和罗丹明B溶液模拟有机染料作为吸附研究对象,研究蛭石吸附性能。结果表明:改性蛭石对吡罗红和罗丹明B吸附率分别为67.1%和82.8%,然而蛭石对其几乎不吸附;动力学研究发现吡罗红和罗丹明B吸附基本符合拟二级动力学模型,属于化学性吸附控制过程;经过10次循环后对吡罗红和罗丹明B的再生率都在90%以上,表明改性蛭石具有优异的循环再生性能。
The organic modified vermiculite was synthesized using cetyltrimethylammonium bromide(CTAB) as modifier. The adsorption properties of organic modified vermiculite for pyronine and rhodamine B solution were studied. The results showed that the adsorption rate of pyronine and rhodamine B by modified vermiculite were 67.1% and 82.8%, respectively, but the adsorption rate of vermiculite was 0%. The adsorption of organic modified vermiculite for pyronine and rhodamine B accords with the second-order kinetic model, belonging to the chemical adsorption process control. The regeneration rates of modified vermiculite for pyronine and rhodamine B are above 90% after 10 cycles, respectively, indicating that the modified vermiculite has excellent cycle regeneration ability.
The organic modified vermiculite was synthesized using cetyltrimethylammonium bromide(CTAB) as modifier. The adsorption properties of organic modified vermiculite for pyronine and rhodamine B solution were studied. The results showed that the adsorption rate of pyronine and rhodamine B by modified vermiculite were 67.1% and 82.8%, respectively, but the adsorption rate of vermiculite was 0%. The adsorption of organic modified vermiculite for pyronine and rhodamine B accords with the second-order kinetic model, belonging to the chemical adsorption process control. The regeneration rates of modified vermiculite for pyronine and rhodamine B are above 90% after 10 cycles, respectively, indicating that the modified vermiculite has excellent cycle regeneration ability.
引文
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[5]田维亮,薛东虎,曹婉婧,等.不同剥离方式对蛭石膨胀性能的影响及其机理研究[J].化工矿物与加工,2018,47(4):42-45,49.
[6].王丽娟.蛭石结构改性、有机插层及微波膨胀研究[D].北京:中国地质大学(北京),2014.
[7]王春风.蛭石及其复合隔热材料的组成、结构与性能[D].武汉:武汉科技大学,2012.
[8]葛振红,李国柱,赵超,等.新疆蛭石制备高比表面积二氧化硅的研究[J].非金属矿,2018,41(2):4-6.
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