School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
J Environ Manage. 2021 Oct 15;296:113203. doi: 10.1016/j.jenvman.2021.113203. Epub 2021 Jul 9.
The adsorption process for low concentration phosphorus wastewater treatment has advantages of simple convenience, stable performance and less sludge, while most of current adsorbents fail to be separated for reuse. Meanwhile, few people pay attention to the removal of low concentration phosphorus from tail water by adsorbents. In this study, a newly efficient Fe-Mg-Zr layered double hydroxide beads were prepared by simple in-situ crosslinking method and applied for low concentration phosphorus adsorption from real tail water. The maximum adsorption capacity of Fe-Mg-Zr beads was 21.61 mg/g, showing more practical application value for phosphorus removal. Fixed bed experiments showed that 5.0 g adsorbent could removed 2.12 mg phosphorus from tail wastewater containing 1.03 mg/L phosphorus. The beads adsorbent can be reused with excellent adsorption performance even after five cycles of adsorption-desorption operation. After detailed analyses, it was found that ligand exchange and ion exchange were the dominant mechanisms for phosphorus adsorption by this beads. Overall, the material has the advantages of simple preparation, good adsorption performance, easy separation and recycle, indicating a great potential for low concentration phosphorus wastewater treatment.
用于低浓度磷废水处理的吸附工艺具有简便、性能稳定、污泥少等优点，而大多数现有吸附剂难以分离再利用。同时，很少有人关注吸附剂从尾水中去除低浓度磷。本研究采用简单的原位交联法制备了一种新型高效的 Fe-Mg-Zr 层状双氢氧化物珠体，并将其应用于实际尾水中的低浓度磷吸附。Fe-Mg-Zr 珠体的最大吸附容量为 21.61mg/g，对磷去除具有更实际的应用价值。固定床实验表明，5.0g 吸附剂可从含磷 1.03mg/L 的尾废水中去除 2.12mg 磷。该珠体吸附剂甚至在经过五次吸附-解吸循环后仍具有良好的吸附性能，可重复使用。经过详细分析，发现配体交换和离子交换是该珠体吸附磷的主要机制。总体而言，该材料具有制备简单、吸附性能好、易于分离和回收等优点，在低浓度磷废水处理方面具有很大的应用潜力。
