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Phosphorous removal from wastewater by lanthanum modified Y zeolites 被引量:1

Phosphorous removal from wastewater by lanthanum modified Y zeolites
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摘要 The adsorption capacities of Y zeolite and La (III)-modified Y zeolite were studied. A series of La(III)- modified Y zeolites with different La/Y zeolite mass ratios were characterized by X-ray diffi'action, X-ray fluores- cence and Brunauer-Emmett-Teller surface area analysis. Batch experiments were conducted to evaluate the effects of various experimental parameters, such as pH, ionic strength, coexisting anions (CO32 , Cl-, SO24- and NO3-) and temperature, on the phosphate adsorption. The capacity of the La (III)-modified Y zeolite to remove phosphate increased as the La/Y zeolite mass ratio increased and after 4 h, a phosphate removal efficiency of 95% was achieved for a La/Y zeolite mass ratio of 0.10. The equilibrium adsorption isotherm data correlated better to the Langmuir model than the Freundlich model and the data followed a pseudo-second-order kinetic equation. The adsorption capacities of Y zeolite and La (III)-modified Y zeolite were studied. A series of La(III)- modified Y zeolites with different La/Y zeolite mass ratios were characterized by X-ray diffi'action, X-ray fluores- cence and Brunauer-Emmett-Teller surface area analysis. Batch experiments were conducted to evaluate the effects of various experimental parameters, such as pH, ionic strength, coexisting anions (CO32 , Cl-, SO24- and NO3-) and temperature, on the phosphate adsorption. The capacity of the La (III)-modified Y zeolite to remove phosphate increased as the La/Y zeolite mass ratio increased and after 4 h, a phosphate removal efficiency of 95% was achieved for a La/Y zeolite mass ratio of 0.10. The equilibrium adsorption isotherm data correlated better to the Langmuir model than the Freundlich model and the data followed a pseudo-second-order kinetic equation.
出处 《Frontiers of Chemical Science and Engineering》 SCIE EI CAS CSCD 2015年第2期209-215,共7页 化学科学与工程前沿(英文版)
基金 The authors are also grateful to the Tianjin Natural Science Foundation (No. 12JCYBJ14000) for providing financial assistance for this investigation.
关键词 phosphate removal WASTEWATER lanthanum impregnation Y zeolites phosphate removal, wastewater, lanthanum,impregnation, Y zeolites
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