Mandal Bidyadhar, Ray Samit Kumar
Department of Chemistry, Bijoy Krishna Girls' College, Howrah, India.
Department of Polymer Science and Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
Int J Biol Macromol. 2015 Nov;81:847-57. doi: 10.1016/j.ijbiomac.2015.08.050. Epub 2015 Aug 28.
Several hydrogels were prepared by a free radical polymerization of acrylic acid (AA), sodium acrylate (SA) and AA/hydroxy ethyl methacrylate (HEMA) in the presence of starch in water. These starch incorporated acrylic gels were prepared by varying the concentration of the initiator, monomer, crosslinker and the starch. The resulting gels were characterized by FTIR, SEM, XRD, DTA-TGA, pH at point zero charge (PZC), swelling and the diffusion in water. The gels showed high adsorption and removal% of Safranine T (ST) and Brilliant Cresyl Blue (BCB) dyes from water. The swelling and the adsorption data were fitted to different kinetic models and isotherms. Amongst the three kinds of gels, the starch incorporated sodium polyacrylate gel showed the highest adsorption of 9.7-85.3mg/L (97-61% removal) of BCB dye and 9.1-83mg/L (91-60% removal) of ST dye for a feed dye concentration of 10-140mg/L.
通过在水中淀粉存在下使丙烯酸（AA）、丙烯酸钠（SA）和AA/甲基丙烯酸羟乙酯（HEMA）进行自由基聚合制备了几种水凝胶。通过改变引发剂、单体、交联剂和淀粉的浓度来制备这些含淀粉的丙烯酸凝胶。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、X射线衍射（XRD）、差示热分析-热重分析（DTA-TGA）、零电荷点（PZC）处的pH值、溶胀以及在水中的扩散对所得凝胶进行了表征。这些凝胶对水中的番红T（ST）和灿烂甲酚蓝（BCB）染料表现出高吸附率和去除率。将溶胀和吸附数据拟合到不同的动力学模型和等温线。在这三种凝胶中，对于10-140mg/L的进料染料浓度，含淀粉的聚丙烯酸钠凝胶对BCB染料的吸附量最高，为9.7-85.3mg/L（去除率97-61%），对ST染料的吸附量为9.1-83mg/L（去除率91-60%）。
