Sulfhydryl functionalized hydrogel with magnetism: Synthesis, characterization, and adsorption behavior study for heavy metal removal

Hua, Rong; Li, Zhengkui

doi:10.1016/j.cej.2014.03.097

Cited by 141 publications

(68 citation statements)

References 50 publications

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“…Compared with activated carbon [25] , CNTs [26] or graphene [27] , the as prepared rGO-Fe 3 O 4 shows higher adsorption capacity because the Fe 3 O 4 NPs can prevent the composite sheets from stacking (providing more specific surface area) and more oxygencontaining functional groups on the surfaces(providing more adsorption sites via electrostatistic interaction for positive charge heavy metal ions). However, compared to those adsorbents, such as Fe 3 O 4 -poly(L-cysteine/2-hydroxyethyl acrylate) [28] , thiol-functionalized CNTs/Fe 3 O 4 [29] and Fe 3 O 4 /cyclodextrin polymer [30] , the adsorption capacity of our product is relative lower. It can be ascribed to those functionalized adsorbents with much more functional groups, which can bind more heavy metal ions.…”

Section: Resultsmentioning

confidence: 88%

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Cao

Zhou

et al. 2015

Chem. Res. Chin. Univ.

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The reduced graphene oxide-Fe 3 O 4 (rGO-Fe 3 O 4 ) hybrid nanocomposite was prepared via a one-pot facile hydrothermal method for adsorption of heavy metal ions. The results of compositional and morphological characterizations show that the Fe 3 O 4 NPs with an average diameter of 20 nm have been uniformly dispersed in rGO sheets. Due to the higher specific surface area of rGO and the magnetic properties of Fe 3 O 4 nanoparticles, the prepared rGO-Fe 3 O 4 hybrid nanosheets showed good adsorption capacity for the removal of Pb(II) from wastewater by simple magnetic separation. The result of control tests show that the adsorption capacity of rGO-Fe 3 O 4 can be influenced by the ratio of ferric chloride(FeCl 3 ) to graphene oxide(GO) during the process of sample preparation and the initial concentration of Pb(II). A better adsorption capacity was 30.68 mg/g at n(FeCl 3 )/m(GO) ratio of 1:5(mmol:mg) at pH=7.0 with the initial concentration of Pb(II) ions of 80 mg/L, and the experimental data were well fitted with the Langmuir adsorption model. The composite with absorbed Pb(II) can be easily collected by magnetic separation from wastewater because of the excellent magnetism of Fe 3 O 4 NPs. The rGO-Fe 3 O 4 hybrid nanocomposite provides an effective and environment-friendly absorbent with great application potential in water purification.

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Section: Resultsmentioning

confidence: 88%

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Cao

Zhou

et al. 2015

Chem. Res. Chin. Univ.

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show abstract

“…An absorption band around 3375.64 cm − 1 corresponding to O-H or N-H groups is shifted to 3326.37 cm −1 after adsorption of Pb 2+ and 3232.51 after adsorption of Zn 2+ , which may be ascribed to the complexion of OH and amide groups with metals ions [37][38][39][40]. The peaks at 1615.9 cm − 1 , 1631 cm − 1 and 1649.89 cm − 1 may be attributed to C_O stretching vibration [40][41][42][43][44]. The peak at 1401.3 cm −1 , 1376.97 cm −1 and 1416.68 cm −1 in the spectrum show C-N groups.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 91%

“…and 1117.78 cm −1 . Peaks in the range of 1000-1200 cm −1 should correspond to C-O stretching [42,43,45]. The changes appear in absorption bands in FTIR after adsorption indicates that some functional groups are involved in the sorption process, due to which either they (bands) shift or disappear.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 98%

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

Hafshejani

Nasab

Gholami

et al. 2015

Journal of Molecular Liquids

110

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“…To overcome this problem, recent research has focused on magnetic chitosan composites to apply magnetic separation technology [9,14]. The magnetic separation technique is low cost, rapid, convenient, and amenable to automated methods [15,16], and the magnetic composites can be easily separated from the medium by a simple magnetic field [13,17].…”

Section: Introductionmentioning

confidence: 99%

Response surface methodology approach for optimization of methyl orange adsorptive removal by magnetic chitosan nanocomposite

Ayati

Moghaddam²,

Tanhaei³

et al. 2017

Maced. J. Chem. Chem. Eng.

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In this work, the adsorption process of methyl orange (MO) removal by a magnetic chitosan with an Al 2 O 3 /Fe 3 O 4 core was optimized using the experimental design method in order to maximize the removal efficiency. Response surface methodology (RSM) based on central composite design (CCD) was performed to find the relationship between the effective adsorption parameters on the MO removal efficiency as the response. The statistical parameters of the derived model were acquired: R 2 = 0.9799 and F value = 47.07. Finally, non-linear optimization was carried out and values of 6.5, 0.70 g l -1 , 30 ppm, and 60 min were obtained as the optimum values for pH, adsorbent dosage, initial concentration, and contact time, respectively, while the predicted MO removal efficiency was found to be 96.8 ± 2.2% (with a 95% confidence level). This was in agreement with the experimental response of 96.5 ± 1.4%.Keywords: adsorption; optimization; chitosan; magnetic; response surface methodology ПРИМЕНА НА МЕТОДОЛОГИЈАТА НА ПОВРШИНА НА ОДГОВОР ПРИ ОПТИМИЗАЦИЈА НА АТСОРПТИВНО ОТСТРАНУВАЊЕ НА МЕТИЛ ОРАНЖ СО НАНОКОМПОЗИТ ОД МАГНЕТИЗИРАН ХИТОСАНВо ова истражување, со примена на методот на експериментален дизајн, беше оптимизиран атсорпцискиот процес на отстранување на метил оранж (МО) со магнетизиран хитозан со јадро од Al 2 O 3 /Fe 3 O 4 за да се максимизира ефикасноста на отстранувањето. Беше применета методологијата на површината на одговор (RSM) заснована на централен копмпозитен дизајн (CCD) за да се најде зависноста меѓу ефективните атсорпциски параметри за ефикасноста на отстранувањето на МО како одговор. Беа добиени статистички параметри изведени од моделот R 2 = 0,9799 и вредноста F = 47,07. На крајот, беше извршена нелинеарна оптимизадција и беа добиени следниве соодветни оптимални вредности за рН, доза на атсорбенсот, почетна концентрација и време на контакт од 6,5, 0,70 g l -1 , 30 ppm и 60 min, соодветно, додека предвидената ефикасност на отстранување изнесуваше 96,8 ± 2,2% (со 95% ниво на веродостојност) што беше во согласност со експериментално добиената вредност од 96,5 ± 1,4%.Клучни зборови: атсорпција; оптимизација; хитозан; магнетски својства; методологија на површина на одговор

show abstract

Sulfhydryl functionalized hydrogel with magnetism: Synthesis, characterization, and adsorption behavior study for heavy metal removal

Cited by 141 publications

References 50 publications

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

Response surface methodology approach for optimization of methyl orange adsorptive removal by magnetic chitosan nanocomposite

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