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板栗壳对重金属Cr(Ⅵ)吸附性能的研究

Keywords: 板栗壳,生物吸附剂,,吸附

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Abstract:

从废弃的植物材料中筛选出一种Cr(Ⅵ)高效吸附剂——板栗壳。研究了pH、接触时间、板栗壳用量、温度和Cr(Ⅵ)初始浓度对Cr(Ⅵ)吸附活性的影响。结果表明,板栗壳的最佳pH为2~3。在pH2时,Cr(Ⅵ)的去除率达99.7%。在15~35℃的温度范围内,板栗壳对Cr(Ⅵ)的去除率随温度的升高而增加。30℃时,Cr(Ⅵ)的去除率可达99%。板栗壳用量对Cr(Ⅵ)的去除有明显影响。由0.2g增加到0.4g时,Cr(Ⅵ)的去除率从90.6%提高到99%。在较宽的铬初始浓度范围内,板栗壳对Cr(Ⅵ)有明显的去除作用。

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