Abstract

There is an urgent requirement to develop excellent dye adsorbent, which contains high dye removal capacity with desirable separation property which are imperative to remove anionic and azo dyes from aqueous solutions. To address this issue, novel polymer composites were synthesized with varying reaction parameters, owing to the fact that various grades of graft polymer composites have been optimized. As-synthesized bioadsorbent materials were examined in details by FT-IR, XRD, TGA, SEM-EDX, and VSM. The factors affecting the dye adsorption performance, including the effect of initial dye concentration, adsorbent dosage, treatment time, pH as well as recycling data, were systematically investigated. The reusability test shows that polymer composite can be renewed easily with HCl/NaOH solution as an efficient adsorbent for practical wastewater treatment. The conditions depending on adsorption equilibrium consistent with Langmuir isotherm model and pseudo-second-order kinetic model are the predominant models to describe the experimental data well. Henceforth, this work provided a unique strategy for the design of low-cost bioadsorbent, which can be utilized with grafting various monomers to get features pH-responsive polymer composites for removing targeted emerging dyes from aqueous solutions with rapid and high-adsorption efficiency.

Graphical Abstract 1:A Schematic representation of the targeted dye removal process of chitosan-(acrylic acid-co-APTAC-co-DACPB)/Fe₃O₄ grafted polymer composites from aqueous solution.

摘要

迫切需要开发优异的染料吸附剂，该染料吸附剂具有高的染料去除能力和理想的分离性能，这对于从水溶液中去除阴离子和偶氮染料是必不可少的。为了解决这个问题，由于已经优化了各种等级的接枝聚合物复合材料，合成了具有不同反应参数的新型聚合物复合材料。通过FT-IR，XRD，TGA，SEM-EDX和VSM详细检查了合成后的生物吸附材料。系统地研究了影响染料吸附性能的因素，包括初始染料浓度，吸附剂用量，处理时间，pH值以及回收数据的影响。可重用性测试表明，可以用HCl / NaOH溶液轻松地更新聚合物复合材料，将其作为用于实际废水处理的有效吸附剂。符合朗格缪尔等温线模型和拟二阶动力学模型的吸附平衡条件是较好地描述实验数据的主要模型。从此以后，这项工作为低成本生物吸附剂的设计提供了独特的策略，该策略可与多种单体接枝一起使用，从而获得具有特征性的pH响应聚合物复合材料，从而可以快速，高吸附效率地从水溶液中去除目标新兴染料。

图形摘要1：示意性表示从水溶液中脱乙酰壳多糖-（丙烯酸-共-APTAC-共-DACPB）/ Fe ₃ O ₄接枝的聚合物复合材料的目标染料去除过程。