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Chemcial Industry and Engineering 2019, Vol. 36 Issue (5) :36-42    DOI: 10.13353/j.issn.1004.9533.20181038
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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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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.
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Articles by authors
Tang Qi
Tu Sheng
Wang Xiaohua
Li Chuanqiang
Lin Zhenxue
Keywordswalnut shell;   Pb(Ⅱ) ions;   aniline;   modification technics;   optimization;   adsorption rates     
Received 2018-07-31;
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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,V36(5): 36-42
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