Effect of KMnO4-modified granular activated carbon on the adsorption of Cr(Ⅵ)
Author(s): WEI Xiaoru, ZHAO Meiqing, MA Zichuan, XING Shengtao
Pages: 230-233,268
Year: 2013 Issue: 3
Journal: Journal of Hebei University of Science and Technology
Keyword: activated carbon; modification; potassium permanganate (KMnO4); adsorption; Cr (Ⅵ);
Abstract: 采用KMnO4溶液在回流状态下对颗粒活性炭进行改性,得到新的改性炭.考察了高锰酸钾浓度、pH值、投加量、吸附时间对Cr(Ⅵ)去除率的影响,并测得吸附等温线.结果表明:改性炭对Cr(Ⅵ)的吸附在低pH值时效果更好,且当KMnO4浓度为0.03～0.04 mol/L时,得到的改性炭吸附性能非常好；在pH值为4.0及25℃条件下,AC-3(吸附剂编号)对Cr(Ⅵ)的饱和吸附量比AC-0提高了11.6％;当温度由25℃升高到40℃时,AC-3对Cr(Ⅵ)的饱和吸附量提高了28.0％；改性炭对Cr(Ⅵ)的吸附作用符合Langmuir方程.
Pages: 230-233,268
Year: 2013 Issue: 3
Journal: Journal of Hebei University of Science and Technology
Keyword: activated carbon; modification; potassium permanganate (KMnO4); adsorption; Cr (Ⅵ);
Abstract: 采用KMnO4溶液在回流状态下对颗粒活性炭进行改性,得到新的改性炭.考察了高锰酸钾浓度、pH值、投加量、吸附时间对Cr(Ⅵ)去除率的影响,并测得吸附等温线.结果表明:改性炭对Cr(Ⅵ)的吸附在低pH值时效果更好,且当KMnO4浓度为0.03～0.04 mol/L时,得到的改性炭吸附性能非常好；在pH值为4.0及25℃条件下,AC-3(吸附剂编号)对Cr(Ⅵ)的饱和吸附量比AC-0提高了11.6％;当温度由25℃升高到40℃时,AC-3对Cr(Ⅵ)的饱和吸附量提高了28.0％；改性炭对Cr(Ⅵ)的吸附作用符合Langmuir方程.
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