Effect of Zirconium-Modified Zeolite Addition on Migration and Transformation of Phosphorus in River Sediments Under Static and Hydrodynamic Disturbance Conditions

• Published in: Huanjing kexue Vol. 40; no. 3; p. 1337
• Main Authors: Yu, Yang, Lin, Jian-Wei, Zhan, Yan-Hui, He, Si-Qi, Wu, Xiao-Long, Wang, Yan, Zhao, Yu-Ying, Lin, Ying, Liu, Peng-Xi
• Format: Journal Article
• Language: Chinese
• Published: China 08.03.2019
• Subjects: static; regulation; river sediment; effect; zirconium-modified zeolite; phosphorus migration and transformation; hydrodynamic disturbance
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.201806230

In this study, the effect of the addition of zirconium-modified zeolite (ZrMZ) on the migration and transformation of phosphorus (P) in river sediments under static and hydrodynamic disturbance conditions was studied using sediment core incubation experiments. Results showed that, whether under static or hydrodynamic disturbance condition, the ZrMZ amendment suppressed the release of SRP from sediments into the overlying water. Furthermore, the addition of ZrMZ to the upper sediment (0-10 mm) not only resulted in the decrease of the dissoluble reactive P (SRP) concentration in the overlying water at a depth of 0-30 mm, but also led to the decrease of the diffusion flux of SRP from the pore water to the overlying water across the sediment-water interface (SWI). In addition, the ZrMZ amendment induced the transformation of the redox-sensitive P (BD-P) and HCl extractable P (HCl-P) into the metal oxide-bound P (NaOH-rP) and residual P (Res-P), thus resulting in the reduction of mobile P (sum of NH Cl extractable