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摘要
以电厂废弃物粉煤灰和炭化棉秸秆为原料,制备了粉煤灰-炭化棉秸秆吸附剂,考察了粉煤灰与炭化棉秸秆质量比、pH、吸附时间、吸附温度、振荡频率对Cr(Ⅵ)离子吸附性能的影响。通过正交试验设计优化了吸附剂吸附Cr(Ⅵ)工艺,确定最佳工艺为:m(粉煤灰)∶m(炭化棉秸秆)=1∶3、吸附温度为40℃、吸附时间为25min、pH=4。结果表明,粉煤灰-炭化棉秸秆吸附剂对任何浓度的Cr(Ⅵ)离子均有吸附作用,吸附率较高。
Abstract
Using fly ash and carbonized cotton straw as raw materials,the adsorbent of fly ash and carbonized cotton straw was prepared,the effects of the mass ratio of fly ash and carbonized cotton straw,pH,adsorption time,adsorption temperature and oscillation frequency on Cr(Ⅵ) adsorption were investigated.The process of Cr(Ⅵ) adsorption was optimized by orthogonal design.The orthogonal method was used to design and optimize the adsorption process of Cr(Ⅵ) ions by the adsorbent.The optimum process was determined to be 1∶3 ratio of raw materials(mfly ash∶mcarbon cotton straw) and adsorption temperature was 40℃.The adsorption time was 25min and the pH value was 4.The results shown that the fly ash and carbonized cotton straw can adsorb Cr(Ⅵ) ions of any concentration with high adsorption rate.
关键词
粉煤灰
/
棉秸秆
/
吸附剂
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吸附率
Key words
fly ash
/
cotton straw
/
adsorbent
/
absorption rate
粉煤灰-炭化棉秸秆吸附剂对Cr(Ⅵ)的吸附性能研究[J].
化工新型材料, 2020, 48(4): 274-280 DOI:
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基金资助
新疆生产建设兵团职业教育课题——高职分析化学实验中智能盒子的设计与制作,新疆生产建设兵团科技局青年科技创新资金专项(2014CB016)
