2024 Volume 53 Issue 6 Pages 306-313
This study was conducted to assess the influence of common reed on the metal removal from acid mine drainage（AMD, Zn 30 ㎎/L, Cd 0.3 ㎎/L, Cu 20 ㎎/L, Pb 2.5 ㎎/L, pH 4.7）in constructed wetlands（CWs）. During 1-year lab-scale treatment in a sequencing batch mode, planted and unplanted CWs neutralized the pH value of the synthetic AMD by substrate limestone and removed Cu and Pb to below the effluent standard. Although Cd was also removed to near the effluent standard, Zn removal was insufficient, especially in the planted CW. The plant increased the soil bacteria population and the ratio of Rhodanobacter and Cellulomonas, but suppressed the pH increase. In conclusion, common reed was found to inhibit Zn and Cd immobilization of Zn and Cd in the CW.
