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摘要
采用十六烷基三甲基溴化铵(CTAB)介孔硅作为吸附剂对水溶液中Cr(Ⅵ)离子进行吸附脱除,探讨了影响吸附效果的主要因素,并利用正交试验法对吸附条件进行了优化。单因素实验结果表明,溶液pH、脱除时间和吸附剂投加量对Cr(Ⅵ)的吸附产生较大影响。正交试验法优化的最佳吸附条件为pH=5,温度为30℃,吸附剂投加量为20mg,吸附时间为36h。在此最佳条件下,CTAB介孔硅对Cr(Ⅵ)的吸附脱除率为99.3%。研究表明,CTAB介孔硅对Cr(Ⅵ)具有较高的吸附选择性、吸附能力和吸附容量。
Abstract
Mesoporous silica nanospheres (MSN) with cetyl trimethyl ammonium bromide(CTAB)as template molecule (CTAB-MSN) was used for the removal of Cr(Ⅵ) from aqueous solution.The main factors affecting the removal of Cr(Ⅵ) were discussed,and investigated the optimize conditions using orthogonal experiment method.The results of single factor showed that the solution pH,removal time,and adsorbent dosage had great influence on the Cr(Ⅵ) adsorption onto CTAB-MSN.The optimal conditions of 5 for pH,20mg for adsorbent dosage,36 hour for removal time and 30℃ for temperature were obtained by orthogonal experiment method,and the percent removal achieved was 99.3% under the optimal conditions.CTAB-MSN can significantly improve the efficiency and ability of adsorbing Cr(Ⅵ),and can be used for the removal of Cr(Ⅵ) from aqueous solution.
关键词
Cr(Ⅵ)
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介孔硅
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十六烷基三甲基溴化铵
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吸附
Key words
Cr(Ⅵ)
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mesoporous silica
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CTAB
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adsorption
CTAB介孔硅吸附脱除水中Cr(Ⅵ)研究[J].
化工新型材料, 2022, 50(2): 198-201 DOI:10.19817/j.cnki.issn1006-3536.2022.02.039
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基金资助
“十三五”国家重点研发计划蓝色粮仓科技创新重点专项课题(2019YFD0901702);辽宁省科技厅攻关项目“海水鱼加工副产物的高值化利用关键技术及产业化”(2015103020);泰山学者蓝色产业领军人才团队支撑计划项目“海洋低值蛋白高值化重组利用关键技术集成与产业化”(鲁政办字(2015)19号)资助
