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摘要
采用表面活性剂十六烷基三甲基溴化铵(CTAB)在超声条件下制备了改性巴旦木壳,并对其用于阴阳离子染料的吸附进行了研究。以苋菜红为研究对象,考察了pH、吸附时间、离子强度和染料初始浓度对吸附效果的影响。结果表明,超声30min就可以实现CTAB改性巴旦木壳的制备,其对4种阴阳离子染料均具有良好的脱色效果,但对阴离子染料的脱色结果更好。以苋菜红为模型,显示改性巴旦木壳在中性或弱碱性条件下振荡吸附10min即可实现对苋菜红具有良好的脱色效果,离子强度对吸附有一定影响。吸附等温线研究表明,该吸附适配于Langmuir等温吸附模型,改性巴旦木壳对苋菜红的最大吸附量为13.7mg/g,并且,甲醇可以将改性巴旦木壳上吸附的苋菜红完全洗脱。鉴于CTAB改性巴旦木壳的简便制备方法及对阴阳离子染料良好的脱色性能,可推荐用于废水中阴阳离子染料的去除。
Abstract
Modified badam shell was prepared on ultrasonic wave by surfactant-cetyl trimethylammonium bromide (CTAB),and its adsorption capability for anionic and cationic dyes was studied.Amaranth was selected as researched model,the effects of pH,adsorption time,ionic strength and its original concentration were also investigated.The results showed that the modified badam shell can be prepared by ultrasonic wave of 30 min,and its absorption efficiency was all obvious for 4 types of anionic and cationic dyes,especially for anionic dye.Amaranth was used as a model of an anionic dye,and its adsorption capacity on modified badam shell was very obvious with vibration of 10 minutes at neutral or weak base condition.Nevertheless,the adsorption was affected definitely by ionic strength.The results of adsorption isotherm showed that the adsorption can be described by Langmuir model with a maximum adsorption of 13.7 mg/g for amaranth.In addition,amaranth on modified badam shell can be eluted absolutely by methanol.Due to the facile synthesis process and decolorization performance,the modified badam shell could be recommended as an adsorbent for the removal of anionic and cationic dyes.
关键词
十六烷基三甲基溴化铵
/
改性
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巴旦木壳
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苋菜红
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吸附
Key words
cetyl trimethylammonium bromide
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modification
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badam shell
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amaranth
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adsorption
表面活性剂改性巴旦木壳对阴阳离子染料的吸附研究[J].
化工新型材料, 2018, 46(8): 202-205 DOI:
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基金资助
喀什大学高层次人才项目(GCC16ZK-004)
