摘要
将对羟基苯磺酸钠(SHBS)接枝到PGMA/SiO2微粒的聚甲基丙烯酸缩水甘油酯(PGMA)大分子链上,成功地制备出一种新型的磺酸型螯合吸附材料SHBS-PGMA/SiO2,研究了其对Cd(Ⅱ)的吸附行为。结果表明,SHBS-PGMA/SiO2对Cd(Ⅱ)有很强的螯合吸附能力,吸附容量可以达到0.40mmol/g。吸附行为符合Langmuir与Freundlich吸附模型和准二级动力学方程式,并分别计算了吸附过程的焓变(ΔH)、吉布斯自由能变(ΔG)和熵变(ΔS)等热力学参数。结果表明,该吸附过程是自发的吸热过程。
Sodium 4-hydroxybenzenesulfonate （SHBS） was successfully grafted onto the poly （glycidyl methacrylate） （PGMA） maeromolecular chains of PGMA/SiO2 to obtain a sulfonic acid type chelate adsorbent designated as SHBS-PGMA/SiO2. The adsorption behavior of SHBS-PGMA/SiO2 for Cd（II） was investigated. The experimental results show that SHBS-PGMA/SiO2 possesses strong chelating adsorption ability for Cd（II） and the adsorption capacity reaches 0.40 mmol/g. The adsorption behavior follows Langmuir and Freundlich adsorption model and a pseudo-second-order kinetic model. The thermodynamic constants of the adsorption process, such as enthalpy changes （AH）, Gibbs free energy changes （AG）, and entropy changes （AS）, were evaluated. Results show that the adsorption of SHBS-PGMA/SiO2 for cadmium ion is an endothermic and spontaneous process.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第3期78-81,85,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(5110423)
山西省青年科技研究基金(2010021008-4)
