Separation and determination of iron and manganese in water using polyhydroxyl polyurethane foam

Abstract

The polyhydroxyl-polyurethane foam (PPF) was used as a new sorbent for separation, preconcentration and determination of manganese and iron ions in natural samples. Experimental conditions for effective separation of trace levels of the metal ions were optimized with respect to different experimental parameters in batch and dynamic processes. The maximum sorption of Mn(II) and Fe(III) was in the pH range of 6-8. The kinetics of sorption of the Mn(II) and Fe(III) by the PPF was found to be fast with an average value of half-life of sorption (t 1/2) of 11.7 min. The sorption capacity of PPF was 8.7 lmol g À1 and the recovery of tested ions 99-100% was achieved. The lower detection limit, 0.08 lg L À1 was evaluated using spectrophotometric method. The relative standard deviation (RSD) under optimum conditions is 1.3% (n = 5). The bonding of the studied metal ions by the PPF is useful for the removal of metal contamination from real samples.

Determination of iron, cobalt and nickel ions from aqueous media using the alkali modified miswak

“…Also, the AT-Miswak-F exhibits better capacity toward Fe (III) (30.2 mg g À1 ), Co(II) (14.1 mg g À1 ) and Ni(II) (8.8 mg g À1 ) in comparison to other sorbents e.g. SiO 2 / Nb 2 O 5 /ZnO mixed oxide by sol-gel: 0.5 mg Co g À1 (Diniz et al, 2014), activated carbon: 11.1 mg Co g À1 and 7.8 mg Ni g À1 (Dobrowolski and Otto, 2012), Nile bluegrafted polyurethane foam: 15.0 mg Fe g À1 (El-Shahat et al, 2003), polyhydroxyl polyurethane foam: 0.5 mg Fe g À1 (Moawed et al, 2013), chromosorb 108: 4.7 Co mg g À1 and 4.9 mg Ni g À1 (Tuzen et al, 2005), chitosan polymers: 3.4 mg Co g À1 and 3.1 mg Ni g À1 (Emara et al, 2011), zeolite: 2.0 mg Ni g À1 (Alvarez-Ayuso et al, 2003) and vermiculite: 0.2 mg Ni g À1 (Blais et al, 2003).…”

Manganese in the source of groundwater in Malaysia and the method for the removal process: A review on the adsorption and membrane separation processes

“…In a study by Moawed et al (2012), PPF at various loadings had been used to remove manganese ion. The amount used was in the range of 0.1 to 0.5 g where it was equilibrated with feedwater adjusted at the optimum pH.…”

Polyurethane Composites for Dye and Heavy Metal Removal: (Adsorption Kinetics and Isotherms Studies)

“…This problem demands the preparation of low basicity PF with high sorption capacity. In previous studies, some other research developed PF that contains polyhydroxyl functional group which has high sorption capacity [24,25]. Composite materials composed of polymers and adsorbents show potential for purification applications [26][27].…”