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首页> 美国卫生研究院文献>Scientific Reports >Removal of Mn (II) by Sodium Alginate/Graphene Oxide Composite Double-Network Hydrogel Beads from Aqueous Solutions
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Removal of Mn (II) by Sodium Alginate/Graphene Oxide Composite Double-Network Hydrogel Beads from Aqueous Solutions

机译：海藻酸钠/氧化石墨烯复合双网状水凝胶珠去除水溶液中的锰（II）

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After the successful preparation of empirical double network hydrogel beads from graphene oxide/sodium alginate(GO/SA), its cationic metal adsorption performance in aqueous solutions were investigated. Taking Mn(II) as an example, the contribution of several factors including pH, bead dosage, temperature, contact time and initial concentration ions to adsorption efficiency were examined. The Transmission Electron Microscopy (TEM) results indicate that the GO/SA double (GAD) network hydrogel bead strongly interpenetrate and the adsorption of Mn(II) is mainly influenced by solution pH, bead dose and temperature. The GAD beads exhibit an excellent adsorption capacity of 56.49 mg g−1. The adsorption process fit both Pseudo-second order kinetic model (R2 > 0.97) and the Freundlich adsorption isotherm (R2 > 0.99) and is spontaneous. After seven rounds of adsorption-desorption cycle, the adsorption capacity of GAD hydrogel remained unchanged at 18.11 mg/g.
机译：以氧化石墨烯/海藻酸钠（GO / SA）成功制备了经验性双网水凝胶珠后，研究了其阳离子金属在水溶液中的吸附性能。以Mn（II）为例，考察了pH，微珠用量，温度，接触时间和初始浓度离子对吸附效率的影响。透射电子显微镜（TEM）结果表明，GO / SA双（GAD）网络水凝胶珠相互渗透很强，并且Mn（II）的吸附主要受溶液pH，珠剂量和温度的影响。 GAD珠具有出色的吸附能力，为56.49 mg g -1 。吸附过程符合伪二级动力学模型（R 2 2

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