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Removal of Cu(II) ions from simulated wastewater using bagasse pith grafted polyacrylamide copolymer
Chemical Engineering Research and Design ( IF 3.9 ) Pub Date : 2020-09-16 , DOI: 10.1016/j.cherd.2020.09.012
Junle Shen , Kangchun Li , Yaseen Muhammad , Ning Zhang , Xuan Guo , Sidra Subhan , Changli Lan , Kun Liu , Fuchuan Huang

Agricultural wastes as low-cost adsorbents with metal-binding capacities have gained greater scientific attentions; still their selectivity is badly affected by poor surface activity. Therefore, in this study, bagasse pith grafted copolymer (BPGC) adsorbent was prepared by aqueous solution polymerization using bagasse pith waste as raw material and acrylamide as grafting monomer. Textural characterization of the synthesized adsorbent was performed by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction techniques. The effect of adsorbent dosage, solution pH and initial concentration of Cu(II) on the adsorption performance of BPGC were studied. BPGC realized higher Cu(II) adsorption performance (105.3 mg·g−1) than the pristine bagasse pith following pseudo second order kinetic model. The Langmuir adsorption model better described the isothermal adsorption behavior confirming the monolayer adsorption phenomenon. Energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy analyses and related adsorption data indicated surface complexation and electrostatic interaction phenomena during the adsorption of Cu(II) with the N and O of the amide groups on the BPGC surface. This study can therefore be deemed of promising value for industrial application involving remediation of Cu(II) and other similar heavy metal ions from waste-water.



中文翻译:

甘蔗渣髓接枝聚丙烯酰胺共聚物去除模拟废水中的铜离子

作为具有金属结合能力的低成本吸附剂的农业废料已经得到了越来越多的科学关注。它们的选择性仍然受到不良表面活性的严重影响。因此,本研究以甘蔗渣髓废料为原料,丙烯酰胺为接枝单体,通过水溶液聚合制备甘蔗渣髓接枝共聚物(BPGC)吸附剂。通过傅立叶变换红外光谱,扫描电子显微镜和X射线衍射技术对合成的吸附剂进行结构表征。研究了吸附剂用量,溶液pH值和Cu(II)初始浓度对BPGC吸附性能的影响。BPGC实现了更高的Cu(II)吸附性能(105.3 mg·g -1)比原始的蔗渣髓核遵循伪二级动力学模型。Langmuir吸附模型更好地描述了等温吸附行为,证实了单层吸附现象。能量色散X射线光谱和X射线光电子能谱分析以及相关的吸附数据表明,在Cu(II)与BPGC表面的酰胺基团的N和O吸附过程中,表面络合和静电相互作用现象。因此,这项研究可被认为具有工业应用前景,涉及从废水中修复Cu(II)和其他类似重金属离子。

更新日期:2020-11-02
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