Sodium lauryl sulfate-loaded polyacrylonitrile (SLSLPAN) was synthesized in the present investigation using an in-situ one step process through gamma radiation-induced polymerization. The structure, composition, surface area and pore size and volume of the employed adsorbent were investigated by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and nitrogen adsorption-desorption measurements. Adsorption of radioactive strontium(II) onto SLSLPAN was studied in the pH range 3–13. Batch kinetic data showed that the equilibrium was attained at 840 min and the pseudo-first-order was the best kinetic model for describing the kinetic data of the present adsorption process. The diffusion of strontium(II) into SLSLPAN was deeply studied using four diffusion models, namely, Bangham, Boyd, Weber-Morris and Mathewas-Weber models. Two-parameter (Freundlich, Langmuir and Temkin) and three-parameter (Redlich-Peterson, Toth and Generalized) isotherm models were used to analyze the adsorption equilibrium data of strontium(II) onto SLSLPAN. The maximum adsorption capacity calculated by the Generalized isotherm model is found to be 0.391 mmol strontium(II) per gram of SLSLPAN. The estimated mean free energy (E = 2.151 kJ/mol) indicated that strontium(II) radionuclides were physically adsorbed onto SLSLPAN. The value of enthalpy change (ΔH^o = 35.325 kJ/mol) and those of free energy change (ΔG^o = −15.278, −16.948, −18.619 and −20.288 at 303, 313, 323 and 333 K, respectively) confirmed that adsorption of strontium(II) radionuclides on SLSLPAN was endothermic and spontaneous process.

在本研究中，通过γ射线诱发的聚合反应，采用原位一步法合成了载有十二烷基硫酸钠的聚丙烯腈（SLSLPAN）。通过傅里叶变换红外（FT-IR）光谱，X射线衍射（XRD）和氮吸附-脱附测量研究了所用吸附剂的结构，组成，表面积，孔径和体积。在pH范围3–13中研究了放射性锶（II）在SLSLPAN上的吸附。批动力学数据表明，在840分钟时达到了平衡，拟一级反应是描述本吸附过程动力学数据的最佳动力学模型。用Bangham，Boyd，Weber-Morris和Mathewas-Weber模型这四种扩散模型对锶（II）在SLSLPAN中的扩散进行了深入研究。用两参数等温模型（Freundlich，Langmuir和Temkin）和三参数（Redlich-Peterson，Toth和Generalized）等温模型分析了锶（II）在SLSLPAN上的吸附平衡数据。通过通用等温模型计算得出的最大吸附容量为每克SLSLPAN 0.391 mmol锶（II）。估计的平均自由能（E = 2.151 kJ / mol）表明，锶（II）放射性核素物理吸附在SLSLPAN上。焓变值（ΔH 估计的平均自由能（E = 2.151 kJ / mol）表明，锶（II）放射性核素物理吸附在SLSLPAN上。焓变值（ΔH 估计的平均自由能（E = 2.151 kJ / mol）表明，锶（II）放射性核素物理吸附在SLSLPAN上。焓变值（ΔH^ø = 35.325千焦/摩尔）和那些自由能变化的（ΔG ^ø = -15.278，-16.948，-18.619 -20.288在和303，313，323和333 K，分别）证实锶（II）的放射性核素的吸附上SLSLPAN是吸热和自发过程。