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The use of pomegranate seed activated by mechanochemical process as a novel adsorbent for the removal of anionic dyestuffs: response surface method approach
Chemical Engineering Communications ( IF 2.5 ) Pub Date : 2020-06-10
Ayşe Öztürk, Seda Çetintaş, Deniz Bingöl

This study aims to reveal the potential of using pomegranate seed (PS) as an alternative, new and cost-effective adsorbent for the removal of anionic dyestuffs such as Congo Red (CR) and Remazol Brillant Blue R (RBBR) from aqueous solutions. In addition, the PS was activated by a high-energy planetary ball milling. It was seen that the activated PS (APS) has a higher adsorption capacity and mechanical activation has a positive effect on the adsorption process. The effects of experimental factors were evaluated using both conventional univariate methods and multivariate methods such as response surface methodology (RSM) approach. The effects of experimental factors and possible interactions on both dyestuff removal and adsorption capacity were expressed in mathematical equations. The removal efficiencies over 90% were achieved for both dyestuffs at optimum conditions determined by central composite design (CCD). As a result of isothermic, kinetic, and thermodynamic evaluations, the nature of adsorption was best explained by the Temkin isotherm model and the adsorption mechanism was defined as a chemically controlled, exothermic, and spontaneous reaction. The functional groups and the morphological properties of the adsorbent were determined by Fourier transform infrared spectrophotometry (FTIR) and scanning electron microscopy (SEM) in order to explain the possible interactions between adsorbent and adsorbent molecules.



中文翻译:

机械化学法活化的石榴籽作为新型吸附剂去除阴离子染料的应用:响应面法

这项研究旨在揭示使用石榴籽(PS)作为替代,新型且经济高效的吸附剂从水溶液中去除刚果红(CR)和Remazol Brillant Blue R(RBBR)等阴离子染料的潜力。此外,通过高能行星球磨激活了PS。可以看出,活化的PS(APS)具有更高的吸附能力,而机械活化对吸附过程具有积极的影响。使用常规的单变量方法和多元方法(例如响应面方法(RSM)方法)评估了实验因素的影响。实验方程和可能的相互作用对染料去除和吸附能力的影响用数学方程式表示。在由中央复合设计(CCD)确定的最佳条件下,两种染料的去除效率均达到90%以上。通过等温,动力学和热力学评估,可以通过Temkin等温模型最好地解释吸附的性质,并将吸附机理定义为化学控制,放热和自发反应。通过傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)确定了吸附剂的官能团和形态学性质,以解释吸附剂和吸附剂分子之间可能存在的相互作用。通过Temkin等温模型可以最好地解释吸附的性质,并将吸附机理定义为化学控制,放热和自发反应。通过傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)确定了吸附剂的官能团和形态学性质,以解释吸附剂和吸附剂分子之间可能存在的相互作用。通过Temkin等温模型可以最好地解释吸附的性质,并将吸附机理定义为化学控制,放热和自发反应。通过傅里叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)确定了吸附剂的官能团和形态特性,以解释吸附剂和吸附剂分子之间可能的相互作用。

更新日期:2020-06-10
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