Synthesis and characterization of arginine-doped heliotrope leaves with high clean-up capacity for crystal violet dye from aqueous media
Synthesis and characterization of arginine-doped heliotrope leaves with high clean-up capacity for crystal violet dye from aqueous media
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DOI：
10.2166/wst.2021.446
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发表时间：
2021-10-08
影响因子：
2.7
通讯作者：
Fekhaoui, Mohammed
中科院分区：
文献类型：
--
作者：
Brini, Lahoucine;Hsini, Abdelghani;Fekhaoui, Mohammed
以一种新型的姜黄素修饰的天芥菜叶（Arg@HL）为吸附剂，对结晶紫（CV）染料进行了间歇吸附实验。采用场发射扫描电子显微镜（FE-SEM）、傅里叶变换红外光谱（FT-IR）、热重分析（TGA）、差示扫描量热法（DSC）对Arg@HL进行了表征。实验考察了搅拌接触时间、吸附剂用量、染料初始浓度、温度、染料溶液pH值等因素对吸附剂上染率的影响。在批量规模上，发现吸附的最佳条件如下：CV浓度为20 mg中心点L-1，吸附剂的量为0.75 g中心点L-1，接触时间为90 min，对于Arg@HL，pH为6，温度为25 ℃。结果表明，银-天芥菜叶片对染料结晶紫的吸附动力学符合二级动力学模型。Langmuir模型有效地定义了吸附等温线。结果表明，Arg@HL具有作为低成本吸附剂去除水溶液中CV染料的潜力。
Novel an arginine-modified Heliotrope leaf (Arg@HL) was used as adsorbent for the crystal violet (CV) dye adsorption in a batch process. The physicochemical and morphological composition of Arg@HL were characterized by field-emission-scanning-electron-microscopy (FE-SEM), Fourier transforms infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC). The experiments were carried out to investigate the factors that influence the dye uptake by the adsorbent, such as the contact time under agitation, adsorbent amount, initial dye concentration, temperature and pH of dye solution. The optimum conditions of adsorption were found on the batch scale as followed: CV concentration of 20 mg center dot L-1, an amount of 0.75 g center dot L-1 of the adsorbent, 90 min contact time, 6 pH and 25 degrees C temperature for Arg@HL. The results confirmed a second-order model explaining the dye crystal violet's adsorption's kinetics by Arg-Heliotrope leaves. The Langmuir model effectively defines the adsorption isotherms. The results revealed that the Arg@HL has the potential to be used as a low-cost adsorbent for the removal of CV dye from aqueous solutions.