Montmorillonite-based porous adsorbent prepared by gel casting method was used to adsorb Cr(III)-organic complexes in tanning wastewater,together with the initial concentration of 10 mg L⁻¹. The as-porous adsorbent exhibited an excellent performance of separation. Meanwhile, its structural and morphology were characterized by TG, BET, XRD, SEM, EDS and XPS, showing that the porous adsorbent was complete hollow ball structure. And the adsorption results showed that the adsorption amount of porous adsorbent rapidly declined from 9.58 to 5.28 mg L⁻¹, and only Cr(III) was adsorbed, when the molar ratio of Cr(III) and citrate was more than 1:5. Increased of pH was beneficial to adsorb Cr(III)-citrate in range from 2.46 to 7.12. Furthermore, the best removal efficiency of Cr(III)-organic complex was up to 97% and still above 84% after five cycles with porous adsorbent. Finally, the mechanism on adsorbing Cr(III) with porous adsorbent is also provided. Therefore, a kind of porous adsorbent which was easily separated, was prepared to deeply treat tanning wastewater containing Cr(III)-organic complex, and solve the problem of difficult recycle.

采用凝胶浇注法制备的蒙脱石基多孔吸附剂吸附制革废水中的Cr(III)-有机配合物，初始浓度为10 mg L ^-1。多孔吸附剂表现出优异的分离性能。同时，通过TG、BET、XRD、SEM、EDS和XPS对其结构和形貌进行表征，表明多孔吸附剂为完整的空心球结构。吸附结果表明多孔吸附剂的吸附量从9.58迅速下降到5.28 mg L ^-1, 当 Cr(III) 与柠檬酸盐的摩尔比大于 1:5 时，仅吸附 Cr(III)。在 2.46 到 7.12 的范围内，pH 值的增加有利于吸附 Cr(III)-柠檬酸盐。此外，Cr(III)-有机配合物的最佳去除效率高达97%，并且在使用多孔吸附剂五次循环后仍高于84%。最后，还提供了多孔吸附剂吸附Cr(III)的机理。为此，制备了一种易分离的多孔吸附剂，用于深度处理含Cr(III)-有机络合物的制革废水，解决了回收难的问题。