Magnesium oxide impregnated polyurethane to remove high levels of manganese cations from water

Choi, Hyung Seok; Woo, Nam Chil; Jang, Min; Cannon, Fred S.; Snyder, Shane A.

doi:10.1016/j.seppur.2014.08.037

Cited by 18 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Open cell PUFs are a broad class of polymers having urethane moieties [22][23][24][25]. This class of polymers represents one of the most important three-dimensional (3D) products commercially available for fabricating super hydrophobic adsorbents for many organic and inorganic complex species [24][25][26][27][28][29][30][31]. They have excellent hydrophobicity and oleophilicity required for solid phase absorbents for various polar and non-polar species [25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…oil spell) and inorganic species [33][34][35][36][37][38][39]. Hence, surface modification of PUFs is desired to enhance the wettability and hydrophobicity to make it a super hydrophobic and oleophilic absorbent [25][26][27][28][29][30][31][32][33][34]. Furthermore, the emergence of nanomaterials with excellent properties (particle size and surface area) also makes them ideal for being coupled with PUFs as a model platform towards a target species [37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

View full text Add to dashboard Cite

A simple method has been developed for quantitative retention of traces of mercury(II) ions from aqueous media using polyurethane foams (PUFs) loaded with 4-(2-thiazolylazo) resorcinol (TAR). The kinetics and thermodynamics of the sorption of mercury(II) ions onto PUFs were studied. The sorption of mercury(II) ions onto PUF follows a first-order rate equation with k = 0.176 ± 0.010 min −1. The negative values of ΔH and ΔS may be interpreted as the exothermic chemisorption process and indicative of a faster chemisorption onto the active sites of the sorbent. The sorption data followed Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm models. The D-R parameters β, K DR and E were 0.329 mol 2 kJ −2 , 0.001 μmol g −1 and 1.23 ± 0.07 kJ/mol for the TAR-loaded PUFs, respectively. An acceptable retention and recovery (99.6 ± 1.1%) of mercury(II) ions in water at ≤10 ppb by the TAR-treated PUFs packed columns were achieved. A retention mechanism, involving absorption related to "solvent extraction" and an "added component" for surface adsorption, was suggested for the retention of mercury(II) ions by the used solid phase extractor. The performance of TAR-immobilized PUFs packed column in terms of the number (N), the height equivalent to a theoretical plate (HETP), the breakthrough and critical capacities of mercury(II) ion uptake by the sorbent packed column were found to be 50.0 ± 1.0, 1.01 ± 0.02 mm, 8.75 and 13.75 mg/g, respectively, at 5 mL/min flow rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Al-Bagawi¹,

Ahmad²,

Alwael³

et al. 2019

Chemometrics and Data Analysis in Chromatography

View full text Add to dashboard Cite

show abstract

“…Thus, it especially requires that the filter media have high rigidness, removal capacities, and hydraulic conductivity (HC) at the same time. Recently, polymers have been investigated in removing heavy metals and have been explored in terms of treatment efficiency and removal mechanisms of heavy metals since they could be easily tailored for strength, pore structure, and functionalization [19][20][21][22][23][24].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Pure PU had a smooth surface without pores [20], while the surface was torn at the domain of CaO when 25% CaO was incorporated into the PU framework (Fig. 6(A) and (B).…”

Section: Fesem/edsmentioning

confidence: 99%

Facile and economic one-pot synthesis of rigid functional-polyurethane for the effective treatment of heavy metal-contaminated urban storm water run-off

Vafaeifard

Lee

Akib

et al. 2016

Desalination and Water Treatment

Self Cite

View full text Add to dashboard Cite

A B S T R A C TIn this study, highly permeable rigid polyurethanes (PU) incorporating calcium oxide (CaO) (PU/CaO) composite materials were prepared via a facile and economic one-pot synthesis method and characterized for remediation of heavy metal-contaminated urban storm water run-off (USR) in a fixed-bed column. Column tests were conducted to investigate various parameters, and data were interpreted using the Bed Depth Service Time model to predict service time. Among the media tested, 25% CaO-incorporated PU (PU/CaO-25) had the highest adsorption capacity of Cu(II). PU/CaO-25 had about 2.5-fold higher rigidity (0.38 MPa) than a "typical" rigid polymer (0.15 MPa). Hydraulic conductivity tests showed PU/CaO-25 (avg. 0.4 mm) had a permeability (0.108 cm s −1 ) equivalent or higher than reference sands. Specific structural features of PU/CaO-25 and the remediation mechanism were also determined using FESEM/EDS, XRD, N 2 gas isotherm and chemical equilibrium modeling. Moreover, column tests using simulated USR showed that all heavy metals were removed by PU/CaO-25 to below their regulation levels at~1,100 bed volumes. Based on the physicochemical properties and functionality, PU/CaO-25 may be useful as an effective filter material in USR treatment and reuse applications.

show abstract

“…Solid nano adsorbents are becoming the core of most recent studies in removing heavy metals due to their high capacity and affinity to heavy metal ions. Nano adsorbents such as HFO [13] and MgO [14], have been deposited on the surface of porous materials such as polymeric anion exchanger D-201 [13] and polyurethane foam [14], or incorporated inside electro spun polymers [15] [16] [17]. Nevertheless, the preparation of these adsorbents usually requires complicated and costly methods.…”

mentioning

confidence: 99%

Adsorption Kinetics and Evaluation Study of Iron Oxide Nanoparticles Impregnated in Polyurethane Matrix for Water Filtration Application

Hussein¹,

Abu‐Zahra²

2017

JMMCE

View full text Add to dashboard Cite

A polyurethane (PU) foam composite, loaded with iron oxide nanoparticles (IONPs), was developed for arsenic removal from drinking water at low concentrations. The effect of various synthesis parameters such as the size of IONPs and the foam shape, on the performance of the adsorbents in removing arsenic was investigated. To examine the surface adsorption of arsenic species, Energy Dispersive X-ray Microscopy (EDX) was utilized. Mercury Porosimetry was used to analyze the porosity and density of the PU-IONPs nanocomposites. Atomic Absorption Spectrometry (AAS) was conducted to measure the arsenic concentration in the treated solutions. Kinetic models were applied to determine the mechanisms which control the adsorption process. A pseudo-second-order model was found to be the best fit model for the adsorption data. Experimental results revealed that decreasing the size of IONPs from 50 -100 nm to 15 -20 nm yields a higher removal capacity. In addition, granular adsorbents exhibit higher removal capacity compared to cubical shaped adsorbents in the order of 20% -100%.

show abstract

Magnesium oxide impregnated polyurethane to remove high levels of manganese cations from water

Cited by 18 publications

References 41 publications

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Chromatographic Separation, Total Determination and Chemical Speciation of Mercury in Environmental Water Samples Using 4-(2-Thiazolylazo) Resorcinol-Based Polyurethane Foam Sorbent-Packed Column

Facile and economic one-pot synthesis of rigid functional-polyurethane for the effective treatment of heavy metal-contaminated urban storm water run-off

Adsorption Kinetics and Evaluation Study of Iron Oxide Nanoparticles Impregnated in Polyurethane Matrix for Water Filtration Application

Contact Info

Product

Resources

About