EMAIL THIS PAGE TO A FRIEND

Environmental science & technology

Developing Polycation-Clay Sorbents for Efficient Filtration of Diclofenac: Effect of Dissolved Organic Matter and Comparison to Activated Carbon.


PMID 26126078

Abstract

The presence of nanoconcentrations of persistent pharmaceuticals in treated wastewater effluent and in surface water has been frequently reported. A novel organic-inorganic hybrid sorbent based on adsorbing quarternized poly vinylpyridinium-co-styrene (QPVPcS) to montmorillonite (MMT) was designed for the removal of the anionic micropollutants. QPVPcS-clay composites were characterized by X-ray diffraction, FTIR, thermal gravimetric analysis, Zeta potential and element analysis. Based on these measurements polymer-clay micro- and nanostructures, as a function of polymer loading, were suggested. The affinity of the anionic pharmaceutical, diclofenac (DCF), to the composite was high and did not decrease dramatically with an increase of ionic strength, indicating that the interactions are not only electrostatic. The presence of humic acid (HA) did not hinder DCF removal by the composite; whereas, its filtration by granulated activated carbon (GAC) was compromised in the presence of HA. The kinetics and adsorption at equilibrium of DCF to the composite and to GAC were measured and modeled by the time dependent Langmuir equation. The adsorption of DCF to the composite was significantly faster than to GAC. Accordingly, the filtration of micro- and nanoconcentrations of DCF by composite columns, in the presence of HA, was more efficient than by GAC columns.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

453323
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D
C2D6OS
424005
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D
C2D6OS
417939
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D, contains 0.03 % (v/v) TMS
C2D6OS
417920
Dimethyl sulfoxide-d6, "100%", 99.96 atom % D, contains 1 % (v/v) TMS
C2D6OS
570672
Dimethyl sulfoxide-d6, anhydrous, 99.9 atom % D
C2D6OS
569585
Dimethyl sulfoxide-d6, 99.9 atom % D, anhydrous
C2D6OS
151874
Dimethyl sulfoxide-d6, 99.9 atom % D
C2D6OS
522058
Dimethyl sulfoxide-d6, 99.9 atom % D
C2D6OS
612324
Dimethyl sulfoxide-d6, "Special HOH", ≥99.9 atom % D
C2D6OS
716731
Dimethyl sulfoxide-d6, "Special HOH", ≥99.9 atom % D
C2D6OS
296147
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 0.03 % (v/v) TMS
C2D6OS
574341
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 0.03 % (v/v) TMS
C2D6OS
185965
Dimethyl sulfoxide-d6, 99.9 atom % D, contains 1 % (v/v) TMS
C2D6OS
437697
Dimethyl sulfoxide-d6, 99.5 atom % D, contains 0.1 % (v/v) TMS
C2D6OS
724335
Dimethyl sulfoxide-d6, contains 0.07 wt. % TSP-d4, 99.9 atom % D, 99% (CP)
C2D6OS
289566
Iodomethane, contains copper as stabilizer, ReagentPlus®, 99.5%
CH3I
I8507
Iodomethane, contains copper as stabilizer, ReagentPlus®, 99%
CH3I
67692
Iodomethane, purum, ≥99.0% (GC)
CH3I
19-3510
Iodomethane, SAJ first grade, ≥93.0%
CH3I
456756
Iodomethane solution, 2.0 M in tert-butyl methyl ether, contains copper as stabilizer
CH3I
606731
Iodomethane-12C, ≥99.9 atom % 12C, ≥99% (CP), contains copper as stabilizer
12CH3I