Optimization of Electrodialysis for Ammonium Removal From NH₄Cl-Doped Groundwater Samples Using the Response Surface Method.

IF 2.5 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY ChemistryOpen Pub Date : 2024-10-23 DOI:10.1002/open.202400163

Mohamed Hazra, Fatima Zahra Addar, Mustapha Tahaikt, Azzedine Elmidaoui, Mohamed Taky, Sakina Belhamidi

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Abstract

This study aims to optimize ammonium removal from NH₄Cl-enriched groundwater at different concentrations using an electrodialysis (ED) process. A customized design (CD) based on response surface methodology (RSM) was employed to develop predictive models and improve the performance of the demineralization system. Ion removal efficiency was evaluated in 32 unique experimental configurations, taking into account variations in three input parameters: voltage (A), initial ammonium concentration (B) and demineralization rate (C). These parameters were selected for their impact on two response variables: electric conductivity (Y₁) and final ammonium concentration (Y₂). An in-depth analysis of variance (ANOVA) was performed to examine the variables and their interactions. The results indicated that Y₁ was significantly influenced by C, while Y₂ was influenced by B. In addition, the predictive models demonstrated strong correlations, with a coefficient of determination (R²) greater than 0.88 for both response variables. The RSM approach applied to optimize the parameters studied identified the following optimum values: 14.17 V for A, 1 mg/L for B and 70 % for C, giving Y₁ of 215.377 μS/cm and Y₂ of 0.279 mg/L.

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利用响应面法优化电渗析法去除掺杂 NH4Cl 的地下水样本中的氨。

本研究旨在利用电渗析（ED）工艺优化富含 NH4Cl 的不同浓度地下水的氨去除效果。采用了基于响应面方法学（RSM）的定制设计（CD）来开发预测模型，提高脱盐系统的性能。考虑到电压 (A)、初始铵浓度 (B) 和脱盐率 (C) 这三个输入参数的变化，在 32 种独特的实验配置中对离子去除效率进行了评估。选择这些参数是因为它们对两个响应变量的影响：电导率（Y1）和最终铵浓度（Y2）。对这些变量及其交互作用进行了深入的方差分析（ANOVA）。结果表明，Y1 受 C 的显著影响，而 Y2 则受 B 的影响。此外，预测模型显示出很强的相关性，两个响应变量的决定系数 (R2) 均大于 0.88。采用 RSM 方法对所研究的参数进行优化，确定了以下最佳值：A 为 14.17 V，B 为 1 mg/L，C 为 70%，Y1 为 215.377 μS/cm，Y2 为 0.279 mg/L。

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来源期刊

ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

4.80

自引率

4.30%

发文量

143

审稿时长

1 months

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