Removal rates of phosphorus by modified anthracite substrates coated with different layered double hydroxides reacted by different metal compounds in vertical-flow constructed wetlands
Abstract:Nine different kinds of layered double hydroxides (LDHs) were co-precipitated synthesized under alkaline conditions using MgCl2, ZnCl2, CaCl2, CoCl3, FeCl3, and AlCl3. The simulated test columns were constructed using the modified anthracite substrates in-situ coated with the different synthesized LDHs to treat the urban sewage, and the control treatment (using anthracite as the substrates) was set up at the same time. Compared with control, the removal rates of total phosphorus, total dissolved phosphorus, particulate phosphorus and phosphate in the effluent were improved at different degrees after treating with the nine modified anthracite substrates: The modified anthracite substrates with Zn2+ showed good removal efficiency to total phosphorus, total dissolved phosphorus, particulate phosphorus and phosphate. In particular, the modified anthracite substrates coated with ZnCo-LDHs and ZnAl-LDHs showed average removal rates of 95% to total phosphorus and total dissolved phosphorus, and 98% to phosphate.
张翔凌, 陈巧珍, 陈俊杰, 郭露, 王晓晓, 刘小英, 姜应和. 层状双金属氢氧化物覆膜改性人工湿地无烟煤基质除磷[J]. 中国环境科学, 2014, 34(9): 2239-2244.
ZHANG Xiang-Ling, CHEN Qiao-Zhen, CHEN Jun-Jie, GUO Lu, WANG Xiao-Xiao, LIU Xiao-Ying, JIANG Ying-He. Removal rates of phosphorus by modified anthracite substrates coated with different layered double hydroxides reacted by different metal compounds in vertical-flow constructed wetlands. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(9): 2239-2244.