A green and fast chromatographic method for determining organic compound mobility in soils

Mastrocicco, Micòl; Colombani, Nicolò; Cavazzini, Alberto; Pasti, Luisa

doi:10.1016/j.chroma.2009.08.006

Cited by 6 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies have reported the occurrence of SMX in various countries , , but SMX environmental behavior is still unclear , . One of the most important processes that control the environmental behavior of SMX is its adsorption on solid particles.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Different Sulfamethoxazole Species to Their Overall Adsorption on Functionalized Carbon Nanotubes

Zhang¹,

Pan²,

Zhang³

et al. 2010

Environ. Sci. Technol.

222

View full text Add to dashboard Cite

Antibiotics pose environmental risks, but their adsorption mechanisms are still unclear. Identifying the contributions of different mechanisms is vital in predicting antibiotic environmental behavior and consequently understanding their environmental risks. This study used functionalized carbon nanotubes (CNTs), namely hydroxylized (MH), carboxylized (MC), and graphitized (MG) multiwalled CNTs, as adsorbents and sulfamethoxazole (SMX) as an adsorbate to study the adsorption mechanisms of ionizable organic contaminants on solid particles. At pH around 3.7, SMX always showed the highest adsorption on different CNTs and the adsorption followed the order of MH > MG > MC. Combining the results on SMX specie analysis, the pH-dependent adsorption is well-explained by hydrophobic and electron-donor-acceptor interactions. The adsorption of neutral SMX is always dominant by contributing generally over 80% to the overall adsorption. A significant contribution of cationic SMX at pH < 3.5 suggested significant contribution of hydrogen bonds to SMX adsorption. The strength of bisphenol A (BPA) inhibiting SMX adsorption was dependent on the concentration ratio of BPA to neutral SMX, instead of to the overall SMX concentration. This result emphasized the importance of identifying the dominant mechanisms or species for the adsorption of antibiotics.

show abstract

Section: Introductionmentioning

confidence: 99%

Contribution of Different Sulfamethoxazole Species to Their Overall Adsorption on Functionalized Carbon Nanotubes

Zhang¹,

Pan²,

Zhang³

et al. 2010

Environ. Sci. Technol.

222

View full text Add to dashboard Cite

show abstract

“…The PC1 vs. PC2 score plot show the presence of at least two groups. The first one is located at the right side of the plot consisting of mostly polyaromatic hydrocarbons (compounds 7, [18][19][20][21][22][23][24][25], while the benzodiazepines and the rest of phenols and aromatic compounds are located at the left side of the graph. Two compounds: p-aminobenzoic acid (17) and p-anisidine (11) …”

Section: Exploratory Data Analysismentioning

confidence: 99%

“…Mostly typical reversed-phase (RP) modalities have been used so far, with different combination of sorbents such as: chemically bonded octadecyl silica (RP-18) [7][8][9], cyano-modified silica (CN) [7][8][9][10][11][12][13][14][15], tetramethylamonium-(TMA) [9], aminopropyl- [11], as well as humic acidmodified silica [11,[16][17][18]. In addition, soil materials have been used as sorbents with great success [19][20][21] providing valuable insights into mobility of analytes in different soils [22].…”

Section: Introductionmentioning

confidence: 99%

Linear modeling of the soil-water partition coefficient normalized to organic carbon content by reversed-phase thin-layer chromatography

Andrić

Šegan

Dramićanin³

et al. 2016

Journal of Chromatography A

View full text Add to dashboard Cite

Soil-water partition coefficient normalized to the organic carbon content (KOC) is one of the crucial properties influencing the fate of organic compounds in the environment. Chromatographic methods are well established alternative for direct sorption techniques used for KOC determination. The present work proposes reversed-phase thin-layer chromatography (RP-TLC) as a simpler, yet equally accurate method as officially recommended HPLC technique. Several TLC systems were studied including octadecyl-(RP18) and cyano-(CN) modified silica layers in combination with methanol-water and acetonitrile-water mixtures as mobile phases. In total 50 compounds of different molecular shape, size, and various ability to establish specific interactions were selected (phenols, beznodiazepines, triazine herbicides, and polyaromatic hydrocarbons). Calibration set of 29 compounds with known logKOC values determined by sorption experiments was used to build simple univariate calibrations, Principal Component Regression (PCR) and Partial Least Squares (PLS) models between logKOC and TLC retention parameters. Models exhibit good statistical performance, indicating that CN-layers contribute better to logKOC modeling than RP18-silica. The most promising TLC methods, officially recommended HPLC method, and four in silico estimation approaches have been compared by non-parametric Sum of Ranking Differences approach (SRD). The best estimations of logKOC values were achieved by simple univariate calibration of TLC retention data involving CN-silica layers and moderate content of methanol (40-50%v/v). They were ranked far well compared to the officially recommended HPLC method which was ranked in the middle. The worst estimates have been obtained from in silico computations based on octanol-water partition coefficient. Linear Solvation Energy Relationship study revealed that increased polarity of CN-layers over RP18 in combination with methanol-water mixtures is the key to better modeling of logKOC through significant diminishing of dipolar and proton accepting influence of the mobile phase as well as enhancing molar refractivity in excess of the chromatographic systems.

show abstract

Physicochemical property determinations by liquid chromatography

Poole

Atapattu

2023

Liquid Chromatography

View full text Add to dashboard Cite

A green and fast chromatographic method for determining organic compound mobility in soils

Cited by 6 publications

References 34 publications

Contribution of Different Sulfamethoxazole Species to Their Overall Adsorption on Functionalized Carbon Nanotubes

Contribution of Different Sulfamethoxazole Species to Their Overall Adsorption on Functionalized Carbon Nanotubes

Linear modeling of the soil-water partition coefficient normalized to organic carbon content by reversed-phase thin-layer chromatography

Physicochemical property determinations by liquid chromatography

Contact Info

Product

Resources

About