中文摘要：

采用物理共混的方法将氧化石墨烯（GO）均匀分散在海藻酸钠（SA）溶液中,通过Ca2＋交联成功制备了SA及SA/GO凝胶球,采用红外光谱（FT-IR）、X射线衍射（XRD）、热重（TG）等表征其结构与性能,研究了微球的溶胀性能与吸附性能。结果表明,微球在pH值=7.4的缓冲溶液中的溶胀比明显高于pH值=1.2的溶液,具有pH值敏感性;随GO含量增大,微球的溶胀比呈下降趋势,而吸附量明显增加,对亚甲基蓝（MB）的最大吸附量达153.8 mg/g,去除率可达96.78%,对亚甲基蓝的吸附过程符合Langmuir吸附等温模型。

英文摘要：

Graphene oxide was individually dispersed in SA aqueous solution through physical blending ,and then the SA and SA/GO hydrogel beads were prepared by Ca^2＋ crosslinking successfully.The chemical structure and properties were characterized by FT-IR,XRD,TG.The swelling and adsorption properties of hydrogel beads were studied .The results indicate that SA/GO beads exhibit higher swelling ratio in pH=7.4 buffer solution than in pH=1.2 solution and show pH sensitivity.With increasing the amount of GO,the adsorption capacities increase,while the swelling ratios decrease gradually.The maximal removal percentage and adsorption capacity of MB on the beads are up to 96.78% and 153.8 mg/g with 5wt% GO incorporated respectively,and the adsorp-tion of MB was in accordance with Langmuir model.