Surfactant properties and tetrachloroethene (PCE) solubilisation ability of humic acid-like substances extracted from maize plant and from organic wastes: A comparative study

Fabrizio Adani, Fulvia Tambone, Enrico Davoli, Barbara Scaglia

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Humic acid-like substance (HA-like substance) extracted from maize plant residue at an yield of 81.1 ± 4.9 g kg-1 of dry matter (dm) was tested for surfactant properties and ability to solubilise tetrachloroethene (PCE). Critical micelle concentration (CMC) of HA-like substance was detected to be 1986 mg L-1. Both, HA-like substance composition and average molecular weight [MW] affected CMC and a multiple linear regression model was proposed: CMC = 12 246 - 56.19 alkyl-C - 0.532 MW (R2 = 0.90; P <0.01, n = 7) where CMC was given in mg L-1, alkyl-C was the percentage of total C, and MW was given in Da. Maize-HA-like substance solubilised PCE at the rate of 0.05 g of PCE for each gram of maize-HA-like substance, which was 3.6-9.6 times lower than the data obtained in our earlier work using HA extracted from organic wastes, but was higher than that obtained with commercial HA from leonardite. Taking into consideration the two-site model of solubilisation of PCE in surfactant (i.e., solute partitioning into the micellar hydrophobic core and dissolution and/or binding into the hydrophilic non-ionic shell) and macromolecular composition of HA-like substance, the non-ionic hydrophile-alkyl lipophile balance was expected to control PCE solubilisation as the good multiple linear regression indicated: log Kdom = -1.37 + 0.062 alkyl-C +0.055 O-alkyl-C (R2 = 0.93, P <0.05, n = 6), where log Kdom represents the micelle-water partitioning of PCE (mL g-1) and alkyl-C and O-alkyl-C represent the content of these two kinds of C detected by CP MAS 13C NMR (as % of the total C).

Original languageEnglish
Pages (from-to)1017-1022
Number of pages6
JournalChemosphere
Volume78
Issue number8
DOIs
Publication statusPublished - Feb 2010

Fingerprint

Tetrachloroethylene
Humic Substances
tetrachloroethylene
solubilization
Surface-Active Agents
humic acid
Zea mays
Micelles
surfactant
comparative study
Surface active agents
Critical micelle concentration
maize
Linear Models
Molecular Weight
Molecular weight
Linear regression
partitioning
MAS
plant residue

Keywords

  • Biosurfactant
  • Critical micelle concentration
  • Humic acid-like substance
  • Maize plant residues
  • Tetrachloroethene

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

Cite this

Surfactant properties and tetrachloroethene (PCE) solubilisation ability of humic acid-like substances extracted from maize plant and from organic wastes : A comparative study. / Adani, Fabrizio; Tambone, Fulvia; Davoli, Enrico; Scaglia, Barbara.

In: Chemosphere, Vol. 78, No. 8, 02.2010, p. 1017-1022.

Research output: Contribution to journalArticle

@article{b5553d775aaa438f9d93fa8217a409f0,
title = "Surfactant properties and tetrachloroethene (PCE) solubilisation ability of humic acid-like substances extracted from maize plant and from organic wastes: A comparative study",
abstract = "Humic acid-like substance (HA-like substance) extracted from maize plant residue at an yield of 81.1 ± 4.9 g kg-1 of dry matter (dm) was tested for surfactant properties and ability to solubilise tetrachloroethene (PCE). Critical micelle concentration (CMC) of HA-like substance was detected to be 1986 mg L-1. Both, HA-like substance composition and average molecular weight [MW] affected CMC and a multiple linear regression model was proposed: CMC = 12 246 - 56.19 alkyl-C - 0.532 MW (R2 = 0.90; P <0.01, n = 7) where CMC was given in mg L-1, alkyl-C was the percentage of total C, and MW was given in Da. Maize-HA-like substance solubilised PCE at the rate of 0.05 g of PCE for each gram of maize-HA-like substance, which was 3.6-9.6 times lower than the data obtained in our earlier work using HA extracted from organic wastes, but was higher than that obtained with commercial HA from leonardite. Taking into consideration the two-site model of solubilisation of PCE in surfactant (i.e., solute partitioning into the micellar hydrophobic core and dissolution and/or binding into the hydrophilic non-ionic shell) and macromolecular composition of HA-like substance, the non-ionic hydrophile-alkyl lipophile balance was expected to control PCE solubilisation as the good multiple linear regression indicated: log Kdom = -1.37 + 0.062 alkyl-C +0.055 O-alkyl-C (R2 = 0.93, P <0.05, n = 6), where log Kdom represents the micelle-water partitioning of PCE (mL g-1) and alkyl-C and O-alkyl-C represent the content of these two kinds of C detected by CP MAS 13C NMR (as {\%} of the total C).",
keywords = "Biosurfactant, Critical micelle concentration, Humic acid-like substance, Maize plant residues, Tetrachloroethene",
author = "Fabrizio Adani and Fulvia Tambone and Enrico Davoli and Barbara Scaglia",
year = "2010",
month = "2",
doi = "10.1016/j.chemosphere.2009.11.039",
language = "English",
volume = "78",
pages = "1017--1022",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",
number = "8",

}

TY - JOUR

T1 - Surfactant properties and tetrachloroethene (PCE) solubilisation ability of humic acid-like substances extracted from maize plant and from organic wastes

T2 - A comparative study

AU - Adani, Fabrizio

AU - Tambone, Fulvia

AU - Davoli, Enrico

AU - Scaglia, Barbara

PY - 2010/2

Y1 - 2010/2

N2 - Humic acid-like substance (HA-like substance) extracted from maize plant residue at an yield of 81.1 ± 4.9 g kg-1 of dry matter (dm) was tested for surfactant properties and ability to solubilise tetrachloroethene (PCE). Critical micelle concentration (CMC) of HA-like substance was detected to be 1986 mg L-1. Both, HA-like substance composition and average molecular weight [MW] affected CMC and a multiple linear regression model was proposed: CMC = 12 246 - 56.19 alkyl-C - 0.532 MW (R2 = 0.90; P <0.01, n = 7) where CMC was given in mg L-1, alkyl-C was the percentage of total C, and MW was given in Da. Maize-HA-like substance solubilised PCE at the rate of 0.05 g of PCE for each gram of maize-HA-like substance, which was 3.6-9.6 times lower than the data obtained in our earlier work using HA extracted from organic wastes, but was higher than that obtained with commercial HA from leonardite. Taking into consideration the two-site model of solubilisation of PCE in surfactant (i.e., solute partitioning into the micellar hydrophobic core and dissolution and/or binding into the hydrophilic non-ionic shell) and macromolecular composition of HA-like substance, the non-ionic hydrophile-alkyl lipophile balance was expected to control PCE solubilisation as the good multiple linear regression indicated: log Kdom = -1.37 + 0.062 alkyl-C +0.055 O-alkyl-C (R2 = 0.93, P <0.05, n = 6), where log Kdom represents the micelle-water partitioning of PCE (mL g-1) and alkyl-C and O-alkyl-C represent the content of these two kinds of C detected by CP MAS 13C NMR (as % of the total C).

AB - Humic acid-like substance (HA-like substance) extracted from maize plant residue at an yield of 81.1 ± 4.9 g kg-1 of dry matter (dm) was tested for surfactant properties and ability to solubilise tetrachloroethene (PCE). Critical micelle concentration (CMC) of HA-like substance was detected to be 1986 mg L-1. Both, HA-like substance composition and average molecular weight [MW] affected CMC and a multiple linear regression model was proposed: CMC = 12 246 - 56.19 alkyl-C - 0.532 MW (R2 = 0.90; P <0.01, n = 7) where CMC was given in mg L-1, alkyl-C was the percentage of total C, and MW was given in Da. Maize-HA-like substance solubilised PCE at the rate of 0.05 g of PCE for each gram of maize-HA-like substance, which was 3.6-9.6 times lower than the data obtained in our earlier work using HA extracted from organic wastes, but was higher than that obtained with commercial HA from leonardite. Taking into consideration the two-site model of solubilisation of PCE in surfactant (i.e., solute partitioning into the micellar hydrophobic core and dissolution and/or binding into the hydrophilic non-ionic shell) and macromolecular composition of HA-like substance, the non-ionic hydrophile-alkyl lipophile balance was expected to control PCE solubilisation as the good multiple linear regression indicated: log Kdom = -1.37 + 0.062 alkyl-C +0.055 O-alkyl-C (R2 = 0.93, P <0.05, n = 6), where log Kdom represents the micelle-water partitioning of PCE (mL g-1) and alkyl-C and O-alkyl-C represent the content of these two kinds of C detected by CP MAS 13C NMR (as % of the total C).

KW - Biosurfactant

KW - Critical micelle concentration

KW - Humic acid-like substance

KW - Maize plant residues

KW - Tetrachloroethene

UR - http://www.scopus.com/inward/record.url?scp=75149163556&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=75149163556&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2009.11.039

DO - 10.1016/j.chemosphere.2009.11.039

M3 - Article

C2 - 20044126

AN - SCOPUS:75149163556

VL - 78

SP - 1017

EP - 1022

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 8

ER -