丝瓜络的改性及用其从海水中吸附铀试验研究

Modification of Loofah and Adsorption Uranium From Seawater

研究了通过化学引发将丝瓜络纤维骨架接枝丙烯腈单体,再用盐酸羟胺进行化学改性,制备偕亚胺二肟改性丝瓜络(LC-AO)。利用红外光谱、元素分析、热重分析等手段确定了LC-AO的化学结构,并考察其从模拟海水中吸附与解吸铀的性能。结果表明:LC-AO对铀质量浓度为3 mg/L的模拟海水中铀的吸附量为18.1 mg/g,吸附过程符合准二级动力学模型。

Preparation of imime-dioxime modified loofah(LC-AO)by grafting acrylonitrile onto the fiber framework of loofah through chemical initiation,and then chemically modification with hydroxylamine hydrochloride was studied.The chemistry structure of the synthesized material was determined by FT-IR,elemental analysis and thermogravimetric analysis.The performance of adsorption and desorption for uranium from simulated seawater were investigated.The results show that the adsorption capacity of LC-AO on uranium in simulated seawater with uranium mass concentration of 3 mg/L is 18.1 mg/g.and the adsorption process conforms to pseudo-second-order kinetic model.