Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
Radiation Processing Technology Division, Malaysian Nuclear Agency, 43000 Kajang, Selangor, Malaysia.
Carbohydr Polym. 2016 Mar 15;138:34-40. doi: 10.1016/j.carbpol.2015.11.028. Epub 2015 Dec 1.
Carboxymethyl sago starch-acid hydrogel was prepared via irradiation technique to remove divalent metal ions (Pb, Cu and Cd) from their aqueous solution. The hydrogel was characterized by using Fourier Transform Infrared (FT-IR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The removal of these metal ions was analyzed by using inductively coupled plasma-optic emission spectra (ICP-OES) to study the amount of metal uptake by the hydrogel. Parameters of study include effect of pH, amount of sample, contact time, initial concentration of metal solution and reaction temperature. FTIR spectroscopy shows the CMSS hydrogel absorption peaks at 1741cm(-1), 1605cm(-1) and 1430cm(-1) which indicates the substitution of carboxymethyl group of modified sago starch. The degradation temperature of CMSS hydrogel is higher compared to CMSS due to the crosslinking by electron beam radiation and formed a porous hydrogel. From the data obtained, about 93.5%, 88.4% and 85.5% of Pb, Cu and Cd ions has been respectively removed from their solution under optimum condition.
羧甲基西米淀粉-酸水凝胶是通过辐射技术制备的，用于从其水溶液中去除二价金属离子（Pb、Cu 和 Cd）。该水凝胶通过傅里叶变换红外（FT-IR）、扫描电子显微镜（SEM）和热重分析（TGA）进行了表征。通过电感耦合等离子体-光学发射光谱（ICP-OES）分析了这些金属离子的去除情况，以研究水凝胶对金属的吸附量。研究的参数包括 pH 值、样品量、接触时间、金属溶液的初始浓度和反应温度的影响。FTIR 光谱显示 CMSS 水凝胶在 1741cm(-1)、1605cm(-1)和 1430cm(-1)处的吸收峰，表明改性西米淀粉的羧甲基基团的取代。与 CMSS 相比，CMSS 水凝胶的降解温度更高，这是由于电子束辐射交联形成了多孔水凝胶。从获得的数据中，在最佳条件下，Pb、Cu 和 Cd 离子分别从其溶液中去除了约 93.5%、88.4%和 85.5%。
Zotero 插件