Experimental investigation of cephapirin adsorption to quartz filter sands and dune sands

Jonathan W. Peterson; Theresa A. O'Meara; Michael D. Seymour

doi:10.1007/s10040-007-0272-z

Experimental investigation of cephapirin adsorption to quartz filter sands and dune sands

Jonathan W. Peterson, Theresa A. O'Meara, Michael D. Seymour

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8 Scopus citations

Abstract

Batch experiments were performed to investigate cephapirin (a widely used veterinary antibiotic) adsorption on various size sands of low total organic carbon content (0.08-0.36 wt%). In the aqueous concentration range investigated (11-112 μmol/L cephapirin), adsorption to nearly pure quartz filter sands (0.50-3.35 mm diameter) is low. Isotherms are S-shaped and most display a region of minimum adsorption, where decreased adsorption occurs with increasing solution concentration, followed by increased adsorption at higher concentrations. Cephapirin adsorption to quartz-rich, feldspar-bearing dune sands (0.06-0.35 mm diameter), and the smallest quartz filter sand investigated (0.43-0.50 mm), can be described by linear sorption isotherms over the range of concentrations investigated. Distribution coefficients (K_d) range from 0.94 to 3.45 L/kg. No systematic relationship exists between grain size and amount of adsorption for any of the sands investigated. Cephapirin adsorption is positively correlated to the feldspar ratio (K-feldspar/(albite + Ca-plagioclase). Feldspar-ratio normalization of distribution coefficients was more effective than organic carbon normalization at reducing variability of K_d values in the dune sands investigated.

Original language	English
Pages (from-to)	879-892
Number of pages	14
Journal	Hydrogeology Journal
Volume	16
Issue number	5
DOIs	https://doi.org/10.1007/s10040-007-0272-z
State	Published - Aug 2008
Externally published	Yes

Funding

The project was funded in part by a Howard Hughes Medical Institute Undergraduate Science Program Grant to Hope College, USA, and by the Michigan Space Grant Consortium. Additional financial support was provided by the Hope College Department of Chemistry and the Department of Geological and Environmental Sciences. The authors also thank W. Mungall, E. Hansen and K. Brown for advice and consultation regarding quantitative analysis. Critical reviews from three anonymous reviewers were invaluable.

Funders	Funder number
Department of Geological and Environmental Sciences
Hope College Department of Chemistry
Michigan Space Grant Consortium

Keywords

Adsorption
Antibiotics
Hydrochemistry
Laboratory experiments/measurements
Solute transport

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10.1007/s10040-007-0272-z

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title = "Experimental investigation of cephapirin adsorption to quartz filter sands and dune sands",

abstract = "Batch experiments were performed to investigate cephapirin (a widely used veterinary antibiotic) adsorption on various size sands of low total organic carbon content (0.08-0.36 wt%). In the aqueous concentration range investigated (11-112 μmol/L cephapirin), adsorption to nearly pure quartz filter sands (0.50-3.35 mm diameter) is low. Isotherms are S-shaped and most display a region of minimum adsorption, where decreased adsorption occurs with increasing solution concentration, followed by increased adsorption at higher concentrations. Cephapirin adsorption to quartz-rich, feldspar-bearing dune sands (0.06-0.35 mm diameter), and the smallest quartz filter sand investigated (0.43-0.50 mm), can be described by linear sorption isotherms over the range of concentrations investigated. Distribution coefficients (Kd) range from 0.94 to 3.45 L/kg. No systematic relationship exists between grain size and amount of adsorption for any of the sands investigated. Cephapirin adsorption is positively correlated to the feldspar ratio (K-feldspar/(albite + Ca-plagioclase). Feldspar-ratio normalization of distribution coefficients was more effective than organic carbon normalization at reducing variability of Kd values in the dune sands investigated.",

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author = "Peterson, {Jonathan W.} and O'Meara, {Theresa A.} and Seymour, {Michael D.}",

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Experimental investigation of cephapirin adsorption to quartz filter sands and dune sands

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