In this work, lignosulfonate intercalated Mg 2 Al layered double hydroxide was fabricated by coprecipitation method, which was used as a functional adsorbent for removing pyridine from wastewater. The X-ray powder diffraction and Fourier transformed infrared were carried out to investigate the structure of the product. In the removal process, the as-prepared lignosulfonate intercalated Mg 2 Al layered double hydroxide sample exhibited good adsolubilization property for pyridine, with maximum capacity of 400.8 mg g À1 in initial pyridine concentration of 400 mg/l and the removal percentage achieved about 87.9%. In addition, the influence of pH, time, and initial concentration of pyridine on the adsorption capacity was also examined. Moreover, the adsorption kinetic followed the pseudo-second-order model. Furthermore, after regeneration, the adsorbent can still show high adsorption capacity even for 10 cycles of desorptionadsorption. It hoped that lignosulfonate intercalated Mg 2 Al layered double hydroxide can be used as adsorbent for the removal of organic pollutants in wastewater.

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摘要采用共沉淀法制备得到1,5-萘二磺酸根插层的镁铝类水滑石, 将其应用于废水中Pb 2+ 的脱除. 通过 X射线衍射(XRD)、红外光谱(IR)、扫描电镜(SEM)等表征手段对所制备的粉末样品进行了结构表征. 插层 后的类水滑石对Pb 2+ 表现出较好的络合分离性能, 容量高于110 mg/g. 本文系统探讨了初始pH、类水滑石的 用量、接触时间、络合温度以及Pb 2+ 的初始浓度对脱除溶液中Pb 2+ 的影响. 实验结果表明, 反应条件对Pb 2+ 的脱除有较大的影响, 类水滑石对Pb 2+ 的脱除是通过层间1,5-萘二磺酸根和表面羟基与Pb 2+ 的络合作用实现 的. 处理后, 水溶液中残留的Pb 2+ 浓度低于0.04 mg/L, 这一结果符合国家地表水环境质量标准的第Ⅲ类标准 (≤0.05 mg/L).