Coadsorption of Ciprofloxacin and Cu(II) on Montmorillonite and Kaolinite as Affected by Solution pH

Abstract

The coadsorption of ciprofloxacin (Cip) and Cu(II) on montmorillonite and kaolinite was studied between pH 4.0 and 9.5. At pH < 5.0, Cu

Insights into tetracycline adsorption onto kaolinite and montmorillonite: experiments and modeling

“…This result was consistent with previous studies (Carrasquillo et al 2008;Figueroa et al 2004;Pei et al 2010). This may due to a much lower CEC and surface area, as well as the absence of any expandable clay interlayer regions for kaolinite relative to montmorillonite (Pei et al 2010). Besides, it was also observed that the difference of TC adsorbed amounts onto the two kinds of clay became smaller as pH is increasing (Fig.…”

Soil Chemical Insights Provided through Vibrational Spectroscopy

“…FTIR studies of fluoroquinolone interaction with 1:1 and 2:1 layer silicates have helped reveal differences in sorption between the layer silicates (e.g. intercalation vs external sorption), the influence of exchange cations on adsorption, participation of the carboxylate, ketone, and protonated N in the piperazinyl group in adsorption as a function of pH, and the influence of coadsorbing cations Nowara et al, 1997;Pei et al, 2010;Wang et al, 2011;Wu et al, 2010;Yan et al, 2012). Similar types of FTIR studies focused on tetracycline class antibiotic adsorption have proved useful in evaluating the mechanisms and the types of complexes formed between tetracyclines and minerals (Chang et al, 2009a(Chang et al, , 2009bGu and Karthikeyan, 2005a;Kulshrestha et al, 2004;Zhao et al, 2012b).…”

Occurrence and fate of eleven classes of antibiotics in two typical wastewater treatment plants in South China

“…The high mass load of the fluoroquinolones in the dewatered sludge resulted from the long-term cycling and accumulation of the fluoroquinolones during activated sludge treatment, due to the strong adsorption of fluoroquinolones. The solubilities of fluoroquinolones are low (Table S1) and they can interact strongly with clay, nature organic matter and metal oxides (Aristilde and Sposito, 2010;Pei et al, 2010) (Table S1). It is obvious that adsorption onto sludge is an important aqueous phase removal mechanism for the fluoroquinolones in a WWTP.…”