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化工学报  2014 

利用响应面法优化皂角苷浸提飞灰中重金属的处理条件

DOI: 10.3969/j.issn.0438-1157.2014.02.047, PP. 701-710

Keywords: 皂角苷,焚烧飞灰,重金属,响应面法

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Abstract:

通过响应面法对皂角苷浸提飞灰中Cu、Zn、Pb和Cd4种重金属的实验条件进行优化,选取pH、皂角苷浓度、离子强度、温度、时间和固液比6个因素进行中心组合设计,使用design-expert8.0软件进行数据拟合,建立了Cu、Zn、Pb和Cd去除总量的工艺数学模型,通过方差分析得到6个因素对浸提液中4种重金属去除总量的主效应关系为:pH>固液比>离子强度>皂角苷浓度>温度>时间。对重金属去除总量数据进行design-expert8.0软件优化,得到皂角苷浓度为41.2g·L-1、时间为13.54h、离子强度为0.64mol·L-1、pH为2、固液比为1%和温度为23.4℃时,重金属总去除量达最大值,Cu、Zn、Pb和Cd的去除率分别达到55.12%、6.20%、17.80%和78.11%。

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