摘要
为了实现水中Hg(Ⅱ)的高效吸附去除,采用碳二亚胺盐缩合表面修饰技术,以接枝丙烯酸的聚丙烯纤维为基体材料,将2-氨基4-噻唑乙酸修饰在纤维表面,得到噻唑乙酸功能化聚丙烯螯合纤维,分析了其表面官能团、结构及形貌,研究了不同条件下螯合纤维对Hg(Ⅱ)的吸附行为。结果表明:螯合纤维对Hg(Ⅱ)的吸附符合准二级动力学模型,吸附过程为放热自发的化学吸附行为,等温吸附符合Langmuir模型,最大吸附量高达69.88mg/g。吸附后的螯合纤维能可用1mol/L HCl和5%硫脲混合溶液进行高效洗脱,在10次吸附-解吸后,螯合纤维的吸附量仍保持在初始量的85%以上,表明该螯合纤维可望应用于水体中Hg(Ⅱ)的吸附去除领域。
In order to achieve high-efficient removal of Hg(Ⅱ)from water,surface modification technology based on EDC/NHS amidation reaction was used to prepare 2-Aminothiazol-4-acetic acid(ATA)modified polypropylene fiber grafted acrylic acid(PP-g-AA-ATA).The surface functional groups,structure and morphology were analyzed,and the adsorption behavior was carried out under different conditions.The results showed that the adsorption kinetics followed the pseudo-second-order model and equilibrium data were fitted well with Langmuir isotherms with the maximum adsorption capacity of 69.88 mg/g for Hg(Ⅱ).The adsorbed fibers can be eluted efficiently by a mixture of 1 mol/L HCl and 5%thiourea.After 10 adsorption-desorption,the adsorption capacity of the fiber was still as high as 85%of the initial capacity,indicating that the fiber had good application prospects in the field of Hg(Ⅱ)adsorption and removal in water.
作者
鲁蓉
Lu Rong(Beijing Senmai Testing Technology Co.,Ltd.,Beijing 100013)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第S01期206-210,215,共6页
New Chemical Materials
作者简介
鲁蓉(1979-),女,本科,工程师,主要研究方向为环境分析化学。
