Abstract

The current study proposes the use of magnetic beads for the treatment of nickel ions of the industrial wastewater system. More specifically, the removal of nickel ions is studied in single and multi-metal ion systems which enabled the scalability of nano-enabled technology to industrial systems. The current synthesis neither involves expensive precursors nor complex procedures. Indeed, the improved surface properties of the adsorbent are due to the use of Lantana camara, in the synthesis. The surface properties and functional attributes of the magnetic beads were characterized by FTIR and SEM analyses. The breakthrough experiments were done for selected column depths, varying feed flow rates and metal ion concentrations. In particular, the interventions of the interfering ions of the electroplating effluents are captured in the breakthrough analysis. Besides the lowest bed capacity reported in the multi-metal systems, the column operated with nickel ions showed a maximum bed capacity of 12.36 mg/g at a flow rate of 2 mL/min in the 20 cm bed. Furthermore, an extended breakthrough time of 780 min is obtained for 50 mg/L nickel ion solution at a flow rate of 2 mL/min. In addition, the modelling of breakthrough curves using Thomas, Yoon–Nelson and BDST models have shown reasonable fits. In addition, repeated cycles of regeneration studies showed improved efficiency of 65% in the first cycle. More specifically, the alginate validated the selective preferential adsorption of cationic substances over anionic components in the studied column.

Graphic abstract

中文翻译：

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磁铁矿封装藻酸盐量身定制的材料，用于可持续处理电镀工业废水：色谱柱动力学和传质研究

摘要

当前的研究提出使用磁珠处理工业废水系统中的镍离子。更具体地，在单金属和多金属离子系统中研究了镍离子的去除，这使纳米技术的可扩展性扩展到工业系统。当前的合成既不涉及昂贵的前体也不涉及复杂的程序。实际上，由于使用了马surface丹（Lantana camara），吸附剂的表面性能得以改善，在综合中。通过FTIR和SEM分析表征了磁珠的表面性质和功能特性。针对选定的色谱柱深度，变化的进料流速和金属离子浓度进行了突破性实验。尤其是，在突破分析中捕获了电镀废水中干扰离子的干预。除了在多金属系统中报告的最低床容量之外，在20厘米床中，以镍离子运行的色谱柱在2 mL / min的流速下显示出最大床容量为12.36 mg / g。此外，对于50 mg / L镍离子溶液，以2 mL / min的流速获得了780分钟的延长穿透时间。此外，使用Thomas，Yoon-Nelson和BDST模型对突破曲线进行建模已显示出合理的拟合度。此外，重复的再生研究循环表明，在第一个循环中效率提高了65％。更具体地说，藻酸盐验证了所研究色谱柱中阳离子物质对阴离子组分的选择性优先吸附。

图形摘要