Zhuang Zaifei, Cheng Xin, Cao Liyan, He Guiqiang, Zhou Jian, Wei Yanxia
State Key Laboratory of Environment-friendly Energy Materials, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China; Engineering Research Center of Biomass Materials, Ministry of Education; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Mianyang, Sichuan 621010, PR China.
State Key Laboratory of Environment-friendly Energy Materials, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China; Engineering Research Center of Biomass Materials, Ministry of Education; Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Mianyang, Sichuan 621010, PR China.
Colloids Surf B Biointerfaces. 2023 May;225:113247. doi: 10.1016/j.colsurfb.2023.113247. Epub 2023 Mar 6.
Textile dye wastewater has the characteristics of high concentration, complex composition and changeable color degree and pH, which is difficult to be effectively and completely treated, and easy to cause environmental pollution. Here, a strategy of secondary bond interface assembly of polyethyleneimine on zein microparticles (PEI) (PEI@zein) was constructed to achieve rapid and efficient removal of Reactive Black 5 (RB5), which is one of the most widely used reactive dyes in the textile industry. Structural analysis indicated that the as-prepared PEI layer immobilized on zein microparticles was constructed based on the interface assembly dominated by hydrophobic interactions and electrostatic attraction between PEI molecules and zein chains. The novel interface showed excellent absorption performance for RB5 with an absorption capacity of 631.0 mg·g, rapid adsorption in 2 min, wide pH range of 4-10. Mechanism analysis suggested the effective adsorption of RB5 by PEI@zein microparticles was mainly attributed to secondary bond interface such as electrostatic interaction and hydrogen bond between RB5 and PEI immobilized on the surface of zein microparticles. Moreover, due to the presence of secondary bond interface, RB5 adsorbed on microparticles can be easily desorbed by using 0.01 M NaOH. Therefore, the strategy of secondary bond interface assembly with polyethyleneimine on zein microparticles has high potential for practical application in the treatment of dye-containing wastewater.
纺织印染废水具有浓度高、成分复杂、色度和pH值变化大等特点，难以得到有效、彻底的处理，容易造成环境污染。在此，构建了一种在玉米醇溶蛋白微粒（PEI）上进行聚乙烯亚胺二次键界面组装的策略（PEI@zein），以实现对活性黑5（RB5）的快速高效去除，活性黑5是纺织工业中使用最广泛的活性染料之一。结构分析表明，固定在玉米醇溶蛋白微粒上的PEI层是基于PEI分子与玉米醇溶蛋白链之间的疏水相互作用和静电吸引主导的界面组装构建而成。这种新型界面表现出对RB5优异的吸附性能，吸附容量为631.0 mg·g，在2分钟内快速吸附，pH范围为4 - 10。机理分析表明，PEI@zein微粒对RB5的有效吸附主要归因于RB5与固定在玉米醇溶蛋白微粒表面的PEI之间的静电相互作用和氢键等二次键界面。此外，由于二次键界面的存在，吸附在微粒上的RB5可以很容易地用0.01 M NaOH解吸。因此，在玉米醇溶蛋白微粒上进行聚乙烯亚胺二次键界面组装的策略在含染料废水处理中具有很高的实际应用潜力。
