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化学工业与工程 2019, Vol. 36 Issue (5) :36-42    DOI: 10.13353/j.issn.1004.9533.20181038
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苯胺改性核桃壳作为Pb(Ⅱ)吸附剂的改性工艺优化
汤琪, 涂胜, 王孝华, 李传强, 林珍雪
重庆交通大学材料科学与工程学院, 重庆 400074
Optimization of Modification Technics of Aniline Modified Walnut Shell as Pb(Ⅱ) Adsorbent
Tang Qi, Tu Sheng, Wang Xiaohua, Li Chuanqiang, Lin Zhenxue
School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China

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摘要 苯胺改性核桃壳可显著提高核桃壳对Pb(Ⅱ)的吸附率。详细探讨了改性工艺的影响因素如盐酸介质浓度、苯胺单体浓度、n(过硫酸铵)/n(苯胺)、改性温度、改性时间、核桃壳颗粒度以及核桃壳用量等对改性效果的影响。在单因素实验的基础上,通过正交实验和对比实验对改性工艺进行了进一步优化。得出最适宜的改性工艺为:在150 mL的改性溶液中,苯胺用量为0.4 mol/L,核桃壳用量为6 g,n(过硫酸铵)/n(苯胺)为1∶1,盐酸介质浓度为1.0 mol/L,改性温度为20℃,改性时间为2 h。用此改性工艺制备得到的苯胺改性核桃壳1 g处理150 mL、200 mg/L的含Pb(Ⅱ)模拟废水,对Pb(Ⅱ)的吸附率为95.86%,吸附容量为28.76 mg/g。
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汤琪
涂胜
王孝华
李传强
林珍雪
关键词核桃壳   Pb(Ⅱ)   苯胺   改性工艺   优化   吸附率     
Abstract: Aniline modified walnut shell can significantly improve adsorption rate for Pb(Ⅱ) ions. Some factors, including the concentration of hydrochloric acid, aniline concentration, ammonium persulfate/aniline molar ratio, reaction temperature, reaction time, particle size of walnut shell and walnut shell dosage, were investigated in detail. Based on single factor experiments, the modification technique was further optimized through orthogonal experiments and comparative experiments. Optimum modification technics are as follows:in 150 mL of solution, aniline concentration is 0.4 mol/L, walnut shell dosage is 6 g, ammonium persulfate/aniline molar ratio is 1:1, the concentration of hydrochloric acid is 1.0 mol/L, modification temperature is 20℃ and modification time is 2 h. 1 g adsorbent which was prepared under the selected optimal conditions was used to treat 150 mL of 200 mg/L simulated wastewater containing Pb(Ⅱ) ions. The adsorption rate of Pb(Ⅱ) ions was 95.86% and the adsorption capacity of adsorbent was 28.76 mg/g.
Keywordswalnut shell;   Pb(Ⅱ) ions;   aniline;   modification technics;   optimization;   adsorption rates     
Received 2018-07-31;
Fund:国家自然科学基金资助项目(21307168);重庆市自然科学基金资助项目(cstcjjA50016);重庆交通大学实验教学改革与研究基金(syj201724)。
Corresponding Authors: 汤琪,E-mail:83723885@qq.com。     Email: 83723885@qq.com
About author: 汤琪(1970-),男,副教授,博士,主要从事功能材料和环境材料技术研究。
引用本文:   
汤琪, 涂胜, 王孝华, 李传强, 林珍雪.苯胺改性核桃壳作为Pb(Ⅱ)吸附剂的改性工艺优化[J].  化学工业与工程, 2019,36(5): 36-42
Tang Qi, Tu Sheng, Wang Xiaohua, Li Chuanqiang, Lin Zhenxue.Optimization of Modification Technics of Aniline Modified Walnut Shell as Pb(Ⅱ) Adsorbent[J].  Chemcial Industry and Engineering, 2019,36(5): 36-42
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