School of Chemical Engineering , Hebei University of Technology , Tianjin 300130 , P.R. China.
The Institute of Seawater Desalination and Multipurpose Utilization, SOA , Tianjin 300192 , China.
ACS Appl Mater Interfaces. 2018 Oct 31;10(43):36918-36925. doi: 10.1021/acsami.8b11763. Epub 2018 Oct 17.
Three-dimensionally ordered macroporous cross-linked poly(glycidyl methacrylate) (3DOM) was constructed by water-soluble colloidal crystal templates and further functionalized with N-methyl-d-glucamine (NMDG) to prepare superhydrophilic adsorbents for boron removal from natural seawater. 3DOM adsorbents possess features of interconnected macropore structure, ultrathin pore wall, and superhydrophilicity, making efficient adsorption possible. The effect of cross-linking degree on the adsorption capacity toward boron was investigated. The NMDG-modified 3DOM adsorbent with rich vicinal diol functional groups showed superhydrophilicity and outstanding performance of adsorption. Significantly, its adsorption effect in boron removal from natural seawater indicated that the concentration of boron in natural seawater could decline to 0.16 from 4.24 mg·L when the adsorbent dosage was 1 g·L, whereas the boron rejection reached 96.2%. After 10 regeneration-adsorption cycles, the adsorption capacity of 3DOM adsorbent remained over 85% of the initial value and the ordered structure was hardly changed. Additionally, 3DOM adsorbent could be directly and quickly separated from the seawater by a filter mesh of 16 mesh number. Research shows that the 3DOM adsorbent exhibits an adsorption performance for practical applications in boron removal from natural seawater.
通过水溶性胶体晶体模板构建了三维有序大孔交联聚（甲基丙烯酸缩水甘油酯）（3DOM），并用 N-甲基-D-葡萄糖胺（NMDG）进一步功能化，制备了用于从天然海水中去除硼的超亲水吸附剂。3DOM 吸附剂具有相互连接的大孔结构、超薄孔壁和超亲水性的特点，使其能够进行高效吸附。考察了交联度对硼吸附容量的影响。具有丰富邻二醇官能团的 NMDG 修饰的 3DOM 吸附剂表现出超亲水性和出色的吸附性能。值得注意的是，它在去除天然海水中硼的应用中表现出色，当吸附剂用量为 1 g·L 时，天然海水中硼的浓度可从 4.24 mg·L 降低至 0.16 mg·L，而硼的去除率达到 96.2%。经过 10 次再生-吸附循环后，3DOM 吸附剂的吸附容量仍保持在初始值的 85%以上，且有序结构几乎没有变化。此外，3DOM 吸附剂可以通过 16 目滤网直接快速地从海水中分离出来。研究表明，3DOM 吸附剂在去除天然海水中硼的实际应用中表现出了良好的吸附性能。
