TY - JOUR
T1 - Lead removal from aqueous solution by basaltic scoria
T2 - adsorption equilibrium and kinetics
AU - Ponce-Lira, B.
AU - Otazo-Sánchez, E. M.
AU - Reguera, E.
AU - Acevedo-Sandoval, O. A.
AU - Prieto-García, F.
AU - González-Ramírez, C. A.
N1 - Publisher Copyright:
© 2017, Islamic Azad University (IAU).
PY - 2017/6/1
Y1 - 2017/6/1
N2 - 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 µm) 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.
AB - 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 µm) 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.
KW - Basaltic scoria
KW - Intraparticle diffusion model
KW - Lagergren pseudo-second order
KW - Langmuir isotherm
KW - Lead adsorption
KW - R adsorption limits prediction
UR - http://www.scopus.com/inward/record.url?scp=85020024328&partnerID=8YFLogxK
U2 - 10.1007/s13762-016-1234-6
DO - 10.1007/s13762-016-1234-6
M3 - Artículo
SN - 1735-1472
VL - 14
SP - 1181
EP - 1196
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
IS - 6
ER -