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以废弃沙棘枝为原料,丙烯酸(AA)和丙烯酰胺(AM)为单体合成了一种高吸水树脂—SBP-g-P(AA-coAM),用以除去水体中的亚甲基蓝(MB)。考察了pH、MB初始浓度对吸附性能的影响,并对吸附动力学和热力学进行了研究。结果表明:SBP-g-P(AA-co-AM)对MB有良好的吸附效果,吸附最佳pH值为7;吸附过程符合准二级动力学模型和Langmuir等温吸附方程;吸附反应的ΔG和ΔH值均为负值,说明SBP-g-P(AA-co-AM)吸附MB的过程是自发的放热过程。
A new kind of superabsorbent polymer-BP-g-P (AA-coAM) was synthesized from Abelian Seabuckthorn as raw material and acrylic acid (AA) and acrylamide (AM) as monomers to remove methylene blue (MB) from water. The effects of pH and MB initial concentration on the adsorption performance were investigated. The adsorption kinetics and thermodynamics were also studied. The results showed that SBP-gP (AA-co-AM) had a good adsorption effect on MB with the best pH value of 7. The adsorption process accorded with Quasi-Second Order kinetic model and Langmuir isotherm equation. The adsorption reaction ΔG and ΔH The results showed that the adsorption of MB by SBP-gP (AA-co-AM) was a spontaneous exothermic process.