title: Zeolite (Na) modified by nano-Fe particles adsorbing phosphate in rainwater runoff.
abstract: Zeolite (Na) modified by self-synthesized nano-Fe particles was used as infiltration media to adsorb phosphate in rainwater runoff. The adsorption capacities increased up to 75 times that of natural zeolite at a saturated equilibrium phosphate concentration of 0.42 mg/L. The correlation of capacity and material-specific surface area indicated that specific surface area was not the key factor contributing to the capacity improvement. SEM and XRD analysis showed that chemical reaction between Fe and P to form new products like cacoxenite is the main reason for the increased capacity, and that the method of adding metal ions or particles to improve the adsorption capacity for phosphate is feasible.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. gll06@mails.tsinghua.edu.cn
authors.forename: Lili
authors.initials: L
authors.lastname: Gan
authors.forename: Jiane
authors.initials: J
authors.lastname: Zuo
authors.forename: Bangmi
authors.initials: B
authors.lastname: Xie
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Huang
mesh_terms: D000327:Adsorption; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010710:Phosphates / Q000737:chemistry*; D011891:Rain; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification / Q000379:methods; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D010710:Phosphates; D014874:Water Pollutants, Chemical; D017641:Zeolites; D007501:Iron