Factorial experimental design for optimizing the removal of lead ions from aqueous solutions by cation exchange resin
Factorial experimental design for optimizing the removal of lead ions from aqueous solutions by cation exchange resin
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DOI：
10.1080/19443994.2012.714640
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发表时间：
2013-01
影响因子：
1.1
通讯作者：
D. Kavak;M. Demir;Burak Başsayel;A. Anagun
中科院分区：
文献类型：
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作者：
D. Kavak;M. Demir;Burak Başsayel;A. Anagun
摘要采用全因子设计筛选影响阳离子交换树脂除铅效果的因素。采用方差分析（ANOVA）、学生t检验、缺乏拟合检验和曲率检验对得到的线性模型进行统计学检验。通过不同的实验条件和中心点来考察铅的去除率。实验中使用的因素和水平是；初始pH值（3.5、4.5和5.5），温度（25、35和45℃），初始铅浓度（20、60和100 mg/L）和树脂用量（0.02、0.26和0.5 g）。为了最大限度地去除铅（II）离子，采用了基于最陡爬坡的优化程序。结果表明，当初始pH、温度、初始铅浓度和树脂投加量分别为5、34、32和0.74时，Pb（II）的去除率约为99%。
ABSTRACT Full factorial design of experiments were used to screen the factors affecting the lead removal effiency using cation exchange resin. The obtained linear model was statistically tested using analysis of variance (ANOVA), Student’s t-test, lack of fit test, and test of curvature. The percentage removal of lead was examined by varying experimental conditions with center points. The factors and levels used during the experiments were; initial pH (3.5, 4.5 and 5.5), temperature (25, 35 and 45°C), initial lead concenteration (20, 60, and 100 mg/L) and resin dosage (0.02, 0.26, and 0.5 g). A steepest ascent based optimization procedure was implemented to seek better conditions in terms of maximizing the removal of lead(II) ions. The results showed that approximately 99% removal of Pb(II) was obtained when initial pH, temperature, initial lead concentration, and resin dosage are roughly set to 5, 34, 32, and 0.74, respectively.