Comparative study of the removal of phenolic compounds by biological and non-biological adsorbents

Abel E. Navarro; Norma A. Cuizano; Jose C. Lazo; María R. Sun-Kou; Bertha P. Llanos

doi:10.1016/j.jhazmat.2008.09.077

Comparative study of the removal of phenolic compounds by biological and non-biological adsorbents

Abel E. Navarro, Norma A. Cuizano, Jose C. Lazo, María R. Sun-Kou, Bertha P. Llanos

Sección de Química

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48 Scopus citations

Abstract

The ability of biological and non-biological adsorbents to remove 2-nitrophenol (2-NP) and 2-chlorophenol (2-CP) from aqueous solutions in batch experiments at room temperature was compared. The marine seaweeds Macrocystis integrifolia Bory (S1) and Lessonia nigrescens Bory (S2) were cross-linked with CaCl₂ to enhance their mechanical properties. Natural bentonite was chemically exchanged with hexadecyltrimethylammonium bromide (B1) and bencyltriethylammonium chloride (B2) to increase their affinity towards organic compounds as well. The adsorption capacity of all of the adsorbents strongly depends on solution pH, whereas equilibrium assays showed a mixed mechanism according to the Langmuir and Freundlich isotherms. The maximum adsorption capacity of 2-NP follows the trend: S1 > S2 > B2 > B1 within the range of 97.37 and 18.64 mg g^-1 whereas for 2-CP, it ranged between 24.18 and 9.95 mg g^-1 with the trend: S1 > S2 > B2 ≈ B1. The importance of the octanol-water partition coefficient as the main factor on the adsorption of these compounds on two different kinds of adsorbents is discussed.

Original language	English
Pages (from-to)	1439-1446
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	164
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jhazmat.2008.09.077
State	Published - 30 May 2009

Keywords

Adsorption
Cross-linked algae
Exchanged bentonite
Partition coefficient
pH

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10.1016/j.jhazmat.2008.09.077

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title = "Comparative study of the removal of phenolic compounds by biological and non-biological adsorbents",

abstract = "The ability of biological and non-biological adsorbents to remove 2-nitrophenol (2-NP) and 2-chlorophenol (2-CP) from aqueous solutions in batch experiments at room temperature was compared. The marine seaweeds Macrocystis integrifolia Bory (S1) and Lessonia nigrescens Bory (S2) were cross-linked with CaCl2 to enhance their mechanical properties. Natural bentonite was chemically exchanged with hexadecyltrimethylammonium bromide (B1) and bencyltriethylammonium chloride (B2) to increase their affinity towards organic compounds as well. The adsorption capacity of all of the adsorbents strongly depends on solution pH, whereas equilibrium assays showed a mixed mechanism according to the Langmuir and Freundlich isotherms. The maximum adsorption capacity of 2-NP follows the trend: S1 > S2 > B2 > B1 within the range of 97.37 and 18.64 mg g-1 whereas for 2-CP, it ranged between 24.18 and 9.95 mg g-1 with the trend: S1 > S2 > B2 ≈ B1. The importance of the octanol-water partition coefficient as the main factor on the adsorption of these compounds on two different kinds of adsorbents is discussed.",

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author = "Navarro, {Abel E.} and Cuizano, {Norma A.} and Lazo, {Jose C.} and Sun-Kou, {Mar{\'i}a R.} and Llanos, {Bertha P.}",

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AU - Navarro, Abel E.

AU - Cuizano, Norma A.

AU - Lazo, Jose C.

AU - Sun-Kou, María R.

AU - Llanos, Bertha P.

PY - 2009/5/30

Y1 - 2009/5/30

N2 - The ability of biological and non-biological adsorbents to remove 2-nitrophenol (2-NP) and 2-chlorophenol (2-CP) from aqueous solutions in batch experiments at room temperature was compared. The marine seaweeds Macrocystis integrifolia Bory (S1) and Lessonia nigrescens Bory (S2) were cross-linked with CaCl2 to enhance their mechanical properties. Natural bentonite was chemically exchanged with hexadecyltrimethylammonium bromide (B1) and bencyltriethylammonium chloride (B2) to increase their affinity towards organic compounds as well. The adsorption capacity of all of the adsorbents strongly depends on solution pH, whereas equilibrium assays showed a mixed mechanism according to the Langmuir and Freundlich isotherms. The maximum adsorption capacity of 2-NP follows the trend: S1 > S2 > B2 > B1 within the range of 97.37 and 18.64 mg g-1 whereas for 2-CP, it ranged between 24.18 and 9.95 mg g-1 with the trend: S1 > S2 > B2 ≈ B1. The importance of the octanol-water partition coefficient as the main factor on the adsorption of these compounds on two different kinds of adsorbents is discussed.

AB - The ability of biological and non-biological adsorbents to remove 2-nitrophenol (2-NP) and 2-chlorophenol (2-CP) from aqueous solutions in batch experiments at room temperature was compared. The marine seaweeds Macrocystis integrifolia Bory (S1) and Lessonia nigrescens Bory (S2) were cross-linked with CaCl2 to enhance their mechanical properties. Natural bentonite was chemically exchanged with hexadecyltrimethylammonium bromide (B1) and bencyltriethylammonium chloride (B2) to increase their affinity towards organic compounds as well. The adsorption capacity of all of the adsorbents strongly depends on solution pH, whereas equilibrium assays showed a mixed mechanism according to the Langmuir and Freundlich isotherms. The maximum adsorption capacity of 2-NP follows the trend: S1 > S2 > B2 > B1 within the range of 97.37 and 18.64 mg g-1 whereas for 2-CP, it ranged between 24.18 and 9.95 mg g-1 with the trend: S1 > S2 > B2 ≈ B1. The importance of the octanol-water partition coefficient as the main factor on the adsorption of these compounds on two different kinds of adsorbents is discussed.

KW - Adsorption

KW - Cross-linked algae

KW - Exchanged bentonite

KW - Partition coefficient

KW - pH

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IS - 2-3

ER -

Comparative study of the removal of phenolic compounds by biological and non-biological adsorbents

Abstract

Keywords

UN SDGs

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