Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 4.9 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.colsurfa.2021.127069
Shumei Zhao , Yingqing Zhan , Qingying Feng , Wei Yang , Hongyu Dong , Ao Sun , Xin Wen , Yu-Hsuan Chiao , Shirui Zhang
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Fabrication of highly efficient adsorption and easy-handling absorbent is promising for removal of dyes from wastewater, but it was still a big challenge. In this study, a novel polymer nanofibrous composite absorbent was designed by the decoration of acidified MWCNTs on polydopamine-modified poly(arylene ether nitrile) nanofibrous membrane and following co-deposition of tannic acid/carboxylated chitosan. The structure and composition of as-prepared nanofibrous composite absorbent were confirmed by SEM, FTIR, XPS, and TGA. The congo red (CR) and methylene blue (MeB) were applied as probe dyes to evaluate the adsorption capacity of nanofibrous composite absorbent (With the average pore diameter of 19.21 nm) for cation and anion dyes. It was found that the adsorption capacity of MeB and CR at the optimum pH could reach 633 and 589 mg/g in 300 min, respectively. The adsorption process of MeB and CR followed the Langmuir adsorption model and pseudo-second-order model. Moreover, the nanofibrous composite absorbent exhibited easy-handling property and good regeneration ability, showing the potential application for the efficient adsorption of various dyes from wastewater.
中文翻译:
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易于处理的碳纳米管装饰的聚(亚芳基醚腈)@单宁酸/羧化壳聚糖纳米纤维复合吸收剂可有效去除亚甲蓝和刚果红
制备高效吸附和易于处理的吸收剂有望去除废水中的染料,但仍然是一个很大的挑战。在这项研究中,通过在聚多巴胺改性的聚(亚芳基醚腈)纳米纤维膜上修饰酸化的 MWCNTs 并在单宁酸/羧化壳聚糖的共沉积之后设计了一种新型聚合物纳米纤维复合吸收剂。通过SEM、FTIR、XPS和TGA确认了所制备的纳米纤维复合吸收剂的结构和组成。刚果红(CR)和亚甲蓝(MeB)作为探针染料来评估纳米纤维复合吸收剂的吸附能力(平均孔径为19.21 nm) 用于阳离子和阴离子染料。结果表明,MeB 和 CR 在最佳 pH 值下的吸附容量 在 300 min 内分别达到 633 和 589 mg/g 。MeB和CR的吸附过程遵循Langmuir吸附模型和准二级吸附模型。此外,纳米纤维复合吸收剂表现出易于处理的特性和良好的再生能力,显示出有效吸附废水中各种染料的潜在应用。