氨基改性花生壳吸附水中Cr(Ⅵ)的研究
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摘要
采用环氧氯丙烷、四乙烯五胺改性花生壳成功制备了氨基功能化吸附剂,并应用于水中Cr(Ⅵ)的吸附处理。实验结果表明较好的吸附条件为:改性花生壳投加量1.5 g/L、吸附溶液初始p H为3.0、吸附时间1.5 h,对Cr(Ⅵ)的吸附率可达96.2%,明显高于未改性花生壳的72.7%。
The Amino-functionalized peanut hull absorbent was modified by pichlorohydrin and tetraethylenepentamine, and then it was applied to the adsorption of Cr(Ⅵ) in aqueous solution. The experimental results showed that the optimum adsorption conditions were as follows: The optimum modified conditions were as follows: the modified peanut shell dosage is 1.5 g/L, and the initial pH of the adsorption solution is 3.0, and the adsorption time is 1.5 h. Under the same conditions, the adsorption rate of Cr(Ⅵ) about the modified and unmodified peanut hull were 96.2 % and 72.7 %, respectively, and the adsorption rate raised 23.5 %.
The Amino-functionalized peanut hull absorbent was modified by pichlorohydrin and tetraethylenepentamine, and then it was applied to the adsorption of Cr(Ⅵ) in aqueous solution. The experimental results showed that the optimum adsorption conditions were as follows: The optimum modified conditions were as follows: the modified peanut shell dosage is 1.5 g/L, and the initial pH of the adsorption solution is 3.0, and the adsorption time is 1.5 h. Under the same conditions, the adsorption rate of Cr(Ⅵ) about the modified and unmodified peanut hull were 96.2 % and 72.7 %, respectively, and the adsorption rate raised 23.5 %.
引文
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[4]Lisha Tan,et al.multifunctional nanocomposite Fe3O4@Si O2 m PD/SP for selective removal of Pb(II)and Cr(VI)from aqueous solutions[J].RSC Advances,2014,4(86):45920-45929.
[5]Chunrong Ren,et al.Highly Efficient Adsorption of Heavy Metals onto Novel Magnetic Porous Composites Modified with Amino Groups[J].Journal of chemical and engineering data.2017,62(6):1865-875.
[6]王清,朱世侦,等.磁性四氧化三铁海藻酸钠复合物吸附剂去除水溶液中的Cr(Ⅵ)[J].西华师范大学学报,2017,38(3):282-287.