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首页> 外文期刊>Desalination and water treatment >Use of response surface methodology for the optimization of process parameters for the removal of Congo Red by NaOH treated jute fibre
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Use of response surface methodology for the optimization of process parameters for the removal of Congo Red by NaOH treated jute fibre

机译：使用响应面方法优化NaOH处理过的黄麻纤维去除刚果红的工艺参数

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摘要

Removal of a synthetic azo dye Congo Red has been investigated using a low cost biosorbent i.e. NaOH treated Jute fibre (NTJF). Response surface methodology (RSM) has been employed to optimize the process variables or operating parameters for the removal of the dye (Congo red) from aqueous solution using Design Expert 9.0. To get optimum condition for the dye removal and to obtain maximum adsorption capacity (Q(max)), four operating parameters were considered as Jute dose (10-18 mg/L), pH (5-9), Dye concentration (50, 100 and 150 mg/L) and temperature (293 K, 303 K and 313 K), which are also taken as input process variables and have been varied accordingly as per experimental design as prescribed by the software, whereas maximum adsorption capacity (Q(max)) of the jute for the removal of dye is considered as output response. ANOVA analysis was imposed to investigate the influence of process variables and their interactions. For obtaining Q(max) the optimized conditions are found as (pH = 7.20, temperature 302.130 K, jute dose = 14.524 g/L, dye concentration = 150.00 mg/L). The experimental Q(max) value was 33.69 mg/g, and the RSM predicted Q(max) value is found out as 31.20 mg/g, with a desirability of 0.840, showing excellent accuracy of the experimentation processes. Further, a second order quadratic mathematical model has been developed in order to estimate the performance characteristics. The results depicts that Jute dose and temperature have a great influence on the adsorption capacity. Other studies revealed that the adsorption process was entropy driven, following pseudo-second order rate kinetics, endothermic in nature, sorption occurring is mainly physical-adsorption, and the sorption data fits better to Langmuir isotherm model.
机译：已经研究了使用低成本生物吸附剂，即用NaOH处理的黄麻纤维（NTJF）去除合成的偶氮染料刚果红的方法。已使用响应表面方法（RSM）使用Design Expert 9.0优化工艺变量或操作参数，以从水溶液中去除染料（刚果红）。为了获得最佳的染料去除条件并获得最大吸附容量（Q（max）），考虑了四个操作参数：黄麻剂量（10-18 mg / L），pH（5-9），染料浓度（50， 100和150 mg / L）和温度（293 K，303 K和313 K），它们也被当作输入过程变量，并根据软件规定的实验设计进行了相应的变化，而最大吸附容量（Q（除去染料的黄麻的最大值）视为输出响应。进行了方差分析，以调查过程变量及其相互作用的影响。为了获得Q（max），找到了最佳条件（pH = 7.20，温度302.130 K，黄麻剂量= 14.524 g / L，染料浓度= 150.00 mg / L）。实验Q（max）值为33.69 mg / g，RSM预测Q（max）值为31.20 mg / g，理想值为0.840，显示出优异的实验过程准确性。此外，已经开发了二阶二次数学模型以估计性能特征。结果表明，黄麻剂量和温度对吸附量有很大影响。其他研究表明，吸附过程是由熵驱动的，遵循伪二级速率动力学，本质上是吸热的，吸附发生的主要是物理吸附，并且吸附数据更适合Langmuir等温模型。

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