Tao Wenhong, Qi Ling, Duan Huimin, Liu Shiquan
School of Materials Science and Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, Shandong, China E-mail:
Water Sci Technol. 2017 Apr;75(7-8):1812-1819. doi: 10.2166/wst.2017.050.
Nickel ions (Ni(II)) in aqueous solutions were removed by a sand adsorbent with a surface functionalized porous coating. The sand adsorbent has a very large surface area of 150 m/g. The influence of pH, initial concentration of the solution, temperature, contact time and adsorbent dosage on the removal efficiency of the synthesized sand adsorbent toward Ni(II) in the aqueous solutions were studied. The results indicate that the adsorption of nickel onto the sand adsorbent greatly increases the pH range of 2-4 and slightly increases with temperature from 25 to 40 °C. The maximum removal efficiency and ion retention in per unit mass of the adsorbent were 100% and 5.78 mg/g, respectively, under the specified experimental conditions. The adsorption can be described by the pseudo-second-order kinetic model and the Freundlich adsorption model. The adsorbed nickel (4.24 mg/g) together with the spent adsorbent were successfully employed to prepare a brown glass, suggesting a new way to reutilize the recovered nickel from wastewater and to avoid secondary pollution caused by the used adsorbents.
采用具有表面功能化多孔涂层的砂质吸附剂去除水溶液中的镍离子（Ni(II)）。该砂质吸附剂具有150 m²/g的超大表面积。研究了pH值、溶液初始浓度、温度、接触时间和吸附剂用量对合成的砂质吸附剂去除水溶液中Ni(II)效率的影响。结果表明，镍在砂质吸附剂上的吸附在pH值为2 - 4范围内大幅增加，在25至40 °C温度范围内随温度略有增加。在规定的实验条件下，单位质量吸附剂的最大去除效率和离子保留量分别为100%和5.78 mg/g。该吸附过程可用准二级动力学模型和弗伦德里希吸附模型描述。吸附的镍（4.24 mg/g）与废吸附剂一起成功用于制备棕色玻璃，这为从废水中回收镍的再利用以及避免用过的吸附剂造成二次污染提供了一种新方法。
