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采用一步水热法制得核壳结构的纳米硅锰吸附复合物(SMNA)。对SMNA进行了表征,并对水中镍离子(Ni~(2+))的吸附性能进行研究,研究了有共存离子条件下溶液pH值、吸附时间和解吸再生等对SMNA吸附性能的影响。结果表明:当SiO_2掺杂量为15%(wt,质量分数)时,SMNA对Ni~(2+)的吸附量可达34.14mg/g,比δ-MnO_2的吸附量提高了17.08%;并且吸附速率也有所增大,达到吸附平衡的时间由原来的>60min缩短到了20min;SMNA经过酸再生4次循环后吸附量为32.25mg/g,仅比未经酸再生循环时的最大吸附量34.14mg/g下降了5.36%,具有较好的吸附性能。
A one-step hydrothermal method was used to prepare a core-shell nanosilica-manganese complex (SMNA). The SMNA was characterized and the adsorption properties of Ni 2+ in water were studied. The effects of solution pH, adsorption time, desorption and regeneration on the adsorption properties of SMNA were investigated. The results show that the amount of Ni 2+ adsorbed by SMNA is 34.14 mg / g, which is 17.08% higher than that of δ-MnO 2 when the content of SiO 2 is 15% (wt). The adsorption rate was also increased, the adsorption equilibrium time was shortened from 60 min to 20 min, and the adsorption capacity of SMNA after 4 cycles of acid regeneration was 32.25 mg / g, which was only 34.14% more than the maximum adsorption capacity without acid regeneration cycle mg / g decreased by 5.36%, with good adsorption properties.