title: Phosphate removal from water by a novel zeolite/lanthanum hydroxide hybrid material prepared from coal fly ash.
abstract: This study was undertaken to investigate the effectiveness of the hybrid adsorbent, which was synthesized from coal fly ash and was composed of lanthanum hydroxide and zeolite (La-ZFA), for phosphate removal from water. Long-term repeated adsorption tests for 30 days showed that the maximum removal capacity of the material reached 66.09 mg P/g. The fractionation of adsorbed phosphorus indicated that phosphate immobilized by La-ZFA was quite irreversible and was dominated by HCl-P fraction. It was suggested that the immobilization of phosphate was mainly attributed to lanthanum hydroxide and was slightly influenced by coexistence of other anions (Cl(-), NO3(-), SO4(2-), and HCO3(-)). At a La/P molar ratio between 1.5:1 and 2.0:1, a nearly complete removal (above 98%) of phosphate could be achieved. La-ZFA also exhibited great performance for removing phosphate from lake water (97.29%) as well as the effluent from wastewater treatment plant (97.86%), respectively. In addition, based on the results of the present study, it was believed that La-ZFA could be a potential material for phosphate removal in practical application.
authors: a School of Environmental Science and Engineering, Shanghai Jiao Tong University , Shanghai , China.
authors: Jie
authors: J
authors: Xie
authors: Li
authors: L
authors: Lai
authors: Lidan
authors: L
authors: Lin
authors: Deyi
authors: D
authors: Wu
authors: Zhenjia
authors: Z
authors: Zhang
authors: Hainan
authors: H
authors: Kong
mesh_terms: D000327:Adsorption; D060729:Coal Ash / Q000737:chemistry*; D006801:Humans; D060106:Lakes / Q000737:chemistry; D007811:Lanthanum / Q000737:chemistry*; D009994:Osmolar Concentration; D010710:Phosphates / Q000302:isolation & purification* / Q000493:pharmacokinetics; D010758:Phosphorus / Q000302:isolation & purification; D062065:Wastewater / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D060729:Coal Ash; D007811:Lanthanum; D010710:Phosphates; D010758:Phosphorus; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; D017641:Zeolites; C033562:lanthanum hydroxide
keywords: Adsorption; lanthanum; phosphate; wastewater; zeolite