Abstract The application of hierarchically porous sodium dodecylbenzene sulfonate (SDBS) modified vaterite microspheres (Hr-SMV) for the selective adsorption of toxic cationic dyes has been explored in this work. Hr-SMV has been synthesized using a facile and low-cost precipitation method. X-Ray diffraction (XRD), Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), Thermogravimetric analysis (TGA) and N2 adsorption-desorption isotherms have been used to understand the crystal structure, surface area, morphology and surface functionalities of Hr-SMV. As prepared Hr-SMV possesses a surface area of 31.15 m2 g−1 and a hierarchical porous structure. Influence of adsorption parameters on the adsorption of two cationic dyes, Crystal violet (CV) and Methylene blue (MB) has been studied in detail using batch adsorption studies. Maximum adsorption capacities of 68.8 and 316.8 mg g−1 were exhibited by Hr-SMV for MB and CV, respectively. Further, Hr-SMV shows efficient adsorptive removal of other cationic dyes, including Basic fuchsine (BF) and Auramine O (AO). In binary mixtures of cationic dyes, Hr-SMV efficiently removes both cationic dyes, thus highlighting its prospect for practical applications. In binary mixtures of cationic and anionic dyes, Hr-SMV is found to selectively adsorb cationic dyes with high separation factors. Thus, Hr-SMV has been found to be a promising low-cost adsorbent for the efficient adsorption and separation of cationic dyes from effluents.

中文翻译：

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使用分级多孔 SDBS 改性球霰石微球 (Hr-SMV) 选择性吸附和分离有毒阳离子染料

摘要 本文探索了分级多孔十二烷基苯磺酸钠 (SDBS) 改性球霰石微球 (Hr-SMV) 在选择性吸附有毒阳离子染料中的应用。已使用简便且低成本的沉淀法合成了 Hr-SMV。X 射线衍射 (XRD)、傅里叶变换红外 (FTIR)、扫描电子显微镜 (SEM)、热重分析 (TGA) 和 N2 吸附-解吸等温线已被用于了解晶体结构、表面积、形貌和表面功能。 Hr-SMV。制备的 Hr-SMV 具有 31.15 m2 g-1 的表面积和分级多孔结构。已经使用批量吸附研究详细研究了吸附参数对两种阳离子染料结晶紫 (CV) 和亚甲蓝 (MB) 吸附的影响。Hr-SMV 对 MB 和 CV 的最大吸附容量分别为 68.8 和 316.8 mg g-1。此外，Hr-SMV 显示出对其他阳离子染料的有效吸附去除，包括碱性品红 (BF) 和金胺 O (AO)。在阳离子染料的二元混合物中，Hr-SMV 有效地去除了两种阳离子染料，从而突出了其实际应用前景。在阳离子和阴离子染料的二元混合物中，发现 Hr-SMV 以高分离因子选择性吸附阳离子染料。因此，已发现 Hr-SMV 是一种有前途的低成本吸附剂，可有效吸附和分离废水中的阳离子染料。包括碱性品红 (BF) 和金胺 O (AO)。在阳离子染料的二元混合物中，Hr-SMV 有效地去除了两种阳离子染料，从而突出了其实际应用前景。在阳离子和阴离子染料的二元混合物中，发现 Hr-SMV 以高分离因子选择性吸附阳离子染料。因此，已发现 Hr-SMV 是一种有前途的低成本吸附剂，可有效吸附和分离废水中的阳离子染料。包括碱性品红 (BF) 和金胺 O (AO)。在阳离子染料的二元混合物中，Hr-SMV 有效地去除了两种阳离子染料，从而突出了其实际应用前景。在阳离子和阴离子染料的二元混合物中，发现 Hr-SMV 以高分离因子选择性吸附阳离子染料。因此，已发现 Hr-SMV 是一种有前途的低成本吸附剂，可有效吸附和分离废水中的阳离子染料。