Removal of metal ions from water using nanohydrogel tragacanth gum-g-polyamidoxime: Isotherm and kinetic study

Masoumi, Arameh; Ghaemy, Mousa

doi:10.1016/j.carbpol.2014.02.083

Cited by 95 publications

(41 citation statements)

References 34 publications

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“…The results show that the uptake was faster at the start-up phase of contact (the first 40 min) and continued up to 120 min with declining speed. Previously, congener results have been reported that explain the rapid uptake onset as due to the larger surface area and easy accessibility to the active site [1,30]. The system was considered to have reached equilibrium at 120 min because of the negligible increase in heavy metal uptake between 120 and 240 min.…”

Section: Effect Of Contact Timementioning

confidence: 99%

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Adsorption of Cu(II), Ni(II) and Pb(II) ions onto polyamine-polyurea polymer modified with pyromellitic dianhydride: kinetic, isotherm and thermodynamic studies

Özer

Boysan

İmamoğlu

2015

Desalination and Water Treatment

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In this study, a polyamine-polyurea polymer modified with pyromellitic dianhydride was used for batch adsorption of Cu(II), Ni(II), and Pb(II) ions to examine the effects of parameters such as pH, contact time, amount of adsorbent, temperature, and initial concentration of heavy metals. The optimum pH value was found to be 6.0 and the contact time required to reach equilibrium was 120 min. Adsorption kinetics, thermodynamics and equilibrium were analysed. The adsorptions of the metal ions were found to comply with the Langmuir isotherm equation and the pseudo-second-order kinetic model. The maximum monolayer adsorption capacity of the modified polymer for Cu(II), Ni(II), and Pb(II) ions was found to be 73.5, 81.3, and 109.9 mg g −1 , respectively. Adsorption mechanism studies of the intraparticle diffusion model showed that surface sorption and intraparticle diffusion contribute to the rate-limiting step. Thermodynamic parameters showed the adsorption processes for all metals with the polymer have an endothermic, irreversible and spontaneous nature.

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Section: Effect Of Contact Timementioning

confidence: 99%

“…The discharge of wastewater involving heavy metals is a growing environmental problem [1]. The aquatic environment is polluted not only from industrial discharge and residential dwellings; groundwater infiltration is also an additional cause of heavy metal pollution [2].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cu(II), Ni(II) and Pb(II) ions onto polyamine-polyurea polymer modified with pyromellitic dianhydride: kinetic, isotherm and thermodynamic studies

Özer

Boysan

İmamoğlu

2015

Desalination and Water Treatment

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“…Two types of linear isotherm equations, i.e., Langmuir and Freundlich, 25,26 were used to fit the adsorption data. Two types of linear isotherm equations, i.e., Langmuir and Freundlich, 25,26 were used to fit the adsorption data.…”

Section: Determination Of Adsorption Capacity Of MMMmentioning

confidence: 99%

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

Chatterjee

2015

Environ. Sci.: Water Res. Technol.

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A flat sheet mixed matrix membrane, made of polyacrylonitrile (PAN) copolymer, impregnated with laterite, was fabricated for the removal of arsenic from water. The permeability and molecular weight cut-off of the selected membrane were 3.4 × 10 −11 m s −1 Pa and 48 kDa, respectively. Morphological analysis showed macrovoids constricted by laterite particles. Surface characteristics assessed by atomic force microscopy revealed the increase in roughness with laterite concentration. The presence of different forms of iron oxide (laterite) and nitrile groups (polyacrylonitrile) in membrane M25 was confirmed by X-ray diffraction.Incorporation of arsenic within the membrane matrix was demonstrated by subsequent lowering of transmittance peaks at different wavelengths of FTIR. Maximum adsorption capacity of the selected membrane was 1.4 mg g −1 at 298 K. Under the optimum operating conditions, the pristine mixed matrix membrane resulted in a filtrate with a concentration below 10 μg l −1 for 17 hours in cross flow mode with a 0.01 m 2 filtration area. The stability of the membrane was demonstrated for three regeneration cycles. The effect of pH and coexisting anions like phosphate, sulphate, carbonate and bicarbonate on the removal efficiency of arsenic was studied. The performance of the membrane in the presence of arsenic-contaminated groundwater was also tested.Environ. Sci.: Water Res. Technol. This journal is A novel, high flux PAN-laterite mixed matrix membrane was prepared, characterized in detail and applied for the removal of arsenic from groundwater. The membrane was in ultrafiltration range with high hydrophilicity. The membrane showed high throughput and, at the same time, high rejection of arsenic. The filtration experiments were conducted using 100 ppb arsenic feed solution as well as real groundwater from the affected area. Permeate flux using contaminated groundwater was as high as 225 l m −2 h −1 with a filtrate concentration less than 10 μg l −1 (WHO limit). The breakthrough time of producing safe drinking water was 17 hours for a virgin membrane (0.01 m 2 filtration area) and this time can be enhanced significantly for a scaled-up filter with a high filtration area.

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“…It consists of two major parts of tragacanthin with hydroxyl group (soluble in water) and bassorin with hydroxyl and carboxyl groups (insoluble but swellable in water) (Fayazzadeh et al, 2014;Ghayempour et al, 2016). TG is a nontoxic, biocompatible and purified polysaccharide with low cost forming gel in water by covalent cross-linking and used as hydrogel polymer (Masoumi & Ghaemy, 2014;Kiani et al, 2012;Khoylou & Naimian, 2009). …”

Section: Introductionmentioning

confidence: 98%

Tragacanth gum /nano silver hydrogel on cotton fabric: In-situ synthesis and antibacterial properties

Montazer

Keshvari

Kahali

2016

Carbohydrate Polymers

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Removal of metal ions from water using nanohydrogel tragacanth gum-g-polyamidoxime: Isotherm and kinetic study

Cited by 95 publications

References 34 publications

Adsorption of Cu(II), Ni(II) and Pb(II) ions onto polyamine-polyurea polymer modified with pyromellitic dianhydride: kinetic, isotherm and thermodynamic studies

Adsorption of Cu(II), Ni(II) and Pb(II) ions onto polyamine-polyurea polymer modified with pyromellitic dianhydride: kinetic, isotherm and thermodynamic studies

Adsorptive removal of arsenic from groundwater using a novel high flux polyacrylonitrile (PAN)–laterite mixed matrix ultrafiltration membrane

Tragacanth gum /nano silver hydrogel on cotton fabric: In-situ synthesis and antibacterial properties

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