Polyurethane composite adsorbent using solid phase extraction method for preconcentration of metal ion from aqueous solution

Abstract

Polyurethane composite adsorbent polymeric material was prepared and investigated for selected solidphase extraction for metal ions, prior to its determination by inductively coupled plasma optical emission spectrometry. The surface characterisation was done using Fourier transform infrared spectroscopy. The separation and preconcentration conditions of the analytes investigated includes influence of pH, sample loading flow rate, elution flow rate, type and concentration of eluents. The optimum pH for the highest efficient recoveries for all metal ions, which ranged from 70 to 85 %, is pH 7. The metal ions were quantitatively eluted with 5 mL of 2 mol/L HNO 3 . Common coexisting ions did not interfere with the separation. The percentage recovery of the metal ions ranged between 70 and 89 %, while the results for the limit of detection and limit of quantification ranged from 0.249 to 0.256 and 0.831 to 0.855, respectively. The experimental tests showed good preconcentration results of trace levels of metal ions using synthesised polyurethane polymer adsorbent composite.

3D-Printed Column with Porous Monolithic Packing for Online Solid-Phase Extraction of Multiple Trace Metals in Environmental Water Samples

“…The main component of Lay-Fomm is polyurethane, according to the manufacturer’s information (Gel-Lay is mainly polyamide; the components of Lay-Felt are unknown) . Polyurethane and its derivatives have been applied widely to extract metal ions on the basis of the selective polymer–metal ion interactions (possibly through the electrostatic interactions between the negatively charged carbonyl groups of polyurethane and these positively charged metal ions to facilitate their retention). ,− Therefore, we expected the effects of both the surface pore structures and the polymer–metal ion interactions to contribute to the extraction of these metal ions; as such, we selected Lay-Fomm 40 as the material most suitable for manufacturing the inner packing.…”

Developments of modified magnetic nanoparticle‐supported heteropolyacid photocatalytic performances in methylene blue scavenger

“…In recent years, the removal of toxic pollutants from industrial waste water has become one of the major environmental problems due to the release of hazardous and toxic chemicals from various industries . The main water contamination sources are the industrial discharge of agricultural activities, chemicals, and other environmental changes .…”

Enriching composite hydrophilic polyurethane foams with PAC to enhance adsorption of phenol from aqueous solutions

“…There are several common approaches applied for the removal of phenol and other organic contaminants from water, including: adsorption to a solid adsorbent [5], biodegradation [6], combined adsorption and photocatalytic degradation [7] and combined adsorption and biodegradation [1,2,8]. Within this concept, many efforts have been directed towards the use of solid adsorbents such as activated carbon (AC), biomass, silica gels, zeolites, clays and synthetic polymers [9][10][11]. Of these sorbent materials, powdered and granular activated carbon are the most widely used [12].…”

“…In addition, one of the most significant advantages of PU is the possibility to improve its physical and chemical characteristics by various additives that can be incorporated during the synthesis (polymerization) process. Recent studies have examined the improvement of mechanical and physical properties of PU foam following its supplementation with various additives such as activated carbon, clays, zeolites, microspheres, and carbon nano-tubes [10,11,[22][23][24][25][26]. Incorporation of sorbents in polymeric foams seems to be a promising technology to improve the adsorption capacity of the polymer for purification of contaminated wastewater and air streams.…”