Producción Científica Profesorado

Lead removal from aqueous solution by basaltic scoria: adsorption equilibrium and kinetics



González Ramírez, César Abelardo

2017

Brenda Ponce-Lira, Ph.D.; Elena Maria Otazo-Sanchez, Ph.D.; Edilso Reguera, Ph.D.; Otilio A Acevedo-Sandoval, Ph.D.; Francisco Prieto-Garcia, Ph.D.; Cesar Abelardo Gonzalez-Ramirez, Ph.D. Lead removal from aqueous solution by basaltic scoria. Adsorption equilibrium and kinetics. International Journal of Environmental Science and Technology (On line 30 de Enero 2017), DOI: 10.1007/s13762-016-1234-6,


Abstract


Pb-contaminated water is a dangerous threat occurring near metallurgic and mining industries. This circumstance produces serious environment concern, due to Pb(II) high toxic effects. Several reactive materials have been reported for Pb(II) adsorption, but not all reached final Pb(II) suitable concentrations, or they are expensive and rejected in massive remediation technologies; hence, natural materials are good options. The adsorption behavior of a volcanic scoria (two sieved fractions 1425 and <425 m) was studied toward synthetic Pb(II) water solutions in batch experiments (170.4?912.3 mg L?1) with high removal efficiencies (97%). The Langmuir model fits both fractions with high linear correlation coefficients (0.9988 and 0.9949) with high maximum capacity values (588.23 and 555.55 mg g?1). Separation factor RL parameter varies with initial concentration, and the empirical equation predicts the limits of the material usefulness, a criterion proposed in this paper for conditions? selection. The Lagergren pseudo-second-order analysis demonstrates chemisorption; calculated rate constant (416.66 mg g?1 min?1). Weber?Morris intraparticle model proves that the adsorption phenomena occur fast on the material surface (kinst = 72 g mg?1 min?0.5). The characterization of the volcanic material afforded the elemental composition (X-ray fluorescence), and the empirical formula was proposed. X-ray diffraction patterns verify the material structure as basalt, with a plagioclase structure that matches anorthite and albite, mostly composed of quartz. The presence of oxides on the material surface explain the high Pb(II) adsorption capacity, observed on the surface by scanning electronic microscopy. The studied volcanic scoria has potential use as a Pb(II) adsorbent in water remediation technologies.



Producto de Investigación




Artículos relacionados

Two-step modeling of the biodegradation of phenol by an acclimated activated sludge

A method for measuring the anoxic biodegradability under denitrifying conditions

3D reconstruction of Artificially Structured Microbial Consortia (ASMC) by image analysis

ESTUDIO DEL PROCESO DE DESTILACIÓN REACTIVA EN LA HIDRODESULFURACIÓN DE GASÓLEO PARA PRODUCIR DIESEL...

Procedures in Ready Biodegradability Testing: Effects of the Inoculation and the Monitored Parameter

MODELACIÓN MATEMÁTICA DE LA CINÉTICA DE CATALIZADORES PARA LA PRODUCCION DE DIESEL DE ULTRA BAJO AZU...

Toward a standardization of the microbial inoculum for ready biodegradability testing of chemicals

Effect of the inoculation level in aerobic biodegradability tests of polymeric materials

Manganese accumulation in plants of the mining zone of Hidalgo, Mexico

Degradación física del almidón de cebada (Hordeum sativun Jess). Correlación entre la gelatinización...