LS-g-PAA/AMPS/APT树脂对亚甲基蓝的吸附性能研究

Adsorption Performance of Methylene Blue Dye by LS-g-P AA / AMPS /APT Resin

摘要:

以木质素磺酸钠（LS-Na）、凹凸棒(APT)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸(AA)为原料，采用微波辐射法，通过接枝共聚合成了生物质LS-g-P AA / AMPS /APT高吸水性树脂吸附剂，利用FTIR和XRD分析了树脂的结构。研究了吸附剂用量、溶液pH、亚甲基蓝（MB)初始浓度、吸附时间、吸附温度对MB的吸附性能的影响。结果显示在体积200mL，MB初始浓度为500mg/L，吸附剂为0.1g时，吸附量和吸附率分别达968mg/L和96%。该树脂具有很强的pH敏感性和高吸附性能。平衡吸附数据基本满足Freundlich吸附等温方程。树脂对MB的吸附过程符合准二级动力学反应模型，主要为吸热化学吸附过程。

Abstract:

Novel lignosulfonate sodium graft 2-acrylamido-2-methylpropanesulfonicacid and acrylic acid and attapulgite (LS-g-P AA / AMPS /APT) biomass resin adsorption was synthesized by grafting polymerization using microwave irradiation.The chemical micstructure of resin was determined by means of FTIR and XRD .The effects of adsorbent dosage，the solution pH, concentration of the dye and the adsorption time and temperature on adsorption process for methylene blue (MB) were studied. The results shows that under the conditions of adsorbent dosage of 0.1g，the dye concentration of 500mg/L and the volume of 200mL,the adsorption capacity and removal was found to be 968 mg/g and 96%, respectively. The resin has strong pH sensitivity and high adsorption capacity.The equilibrium data were fitted to the Freundlich isotherm. The adsorption process of MB onto resin can be described with the pseudo-second-order kinetic model，indicating that the adsorption process is mainly endothermic chemisorption.