Adsorption Kinetics of Toxic Heavy Metal Ions from Aqueous Solutions onto Grafted Jute Fibers with Acrylic Acid by Gamma Irradiation

ABSTRACT

Jute fibers were used as an adsorbent substrate for Hg²⁺ and Pb²⁺ metal ions as toxic pollutants from their aqueous solutions after graft copolymerization with polyacrylic acid under the effect of gamma irradiation. The treated jute fibers were characterized by using of Fourier-Transform Infrared Spectroscopy. The effects of solution pH, contact time, temperature, and the dissolved metal ions’ concentration on the adsorption efficiency were investigated. The adsorption kinetics and the used adsorption isotherm were also investigated. From the results, it was concluded that the adsorption process conformed the second-order kinetic reaction and followed the Langmuir adsorption isotherm model, and the higher adsorption capacities were at pH 5 and 6 for Pb²⁺ and Hg²⁺ metal ions respectively.

摘要

黄麻纤维作为吸附剂基质对Hg²⁺和Pb²⁺金属离子毒性污染物从水溶液与γ射线辐照作用下聚丙烯酸接枝共聚后。用傅立叶变换红外光谱对处理后的黄麻纤维进行表征。考察了溶液pH、接触时间、温度、溶解金属离子浓度对吸附效率的影响。考察了吸附动力学和吸附等温线。从实验的结果，得出的结论是，吸附过程符合二级动力学反应遵循朗格缪尔吸附等温线模型，和较高的吸附容量均在pH 5和6对Pb²⁺、Hg²⁺离子分别

KEYWORDS:

• Adsorption isotherm
• adsorption kinetics
• gamma irradiation
• jute fibers
• metal ion adsorption

关键词:

• 吸附等温线
• 吸附动力学
• 天然纤维
• γ射线照射
• 黄麻纤维
• 金属离子的吸附