Preparation and characterization of amino/thiol bifunctionalized magnetic nanoadsorbent and its application in rapid removal of Pb (II) from aqueous system

Ji, Jiujiang; Chen, Guo; Zhao, Jun

doi:10.1016/j.jhazmat.2019.01.035

Cited by 66 publications

(16 citation statements)

References 28 publications

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“…The pHpzc value of sulfidemodified α-FeOOH significantly increased from 6.69 to 7.40, 7.64, 10.29, 10.39 and 10.43 when the S/Fe ratio increased to 0.1, 0.3, 0.5, 0.8 and 1.0, respectively. Similar phenomenon was found in other thiol-functionalized or sulfide modified iron materials (Ma et al, 2018;Ji et al, 2019). A positively charged surface of sulfide-modified α-…”

Section: Characterization Of Sulfide-modified α-Feoohsupporting

confidence: 83%

Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

et al. 2020

Environmental Pollution

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Section: Characterization Of Sulfide-modified α-Feoohsupporting

confidence: 83%

Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

et al. 2020

Environmental Pollution

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“…On the basis of equilibrium adsorption capacities (298.15 K, pH = 5) of SPEN-CTAB-0% to Pb(II) in different concentrations, Langmuir (Equation (8)) and Freundlich (Equation (9)) models were used to analyze the adsorption isotherm [1]: Ceqt=1KLqm+Ceqm ln qe=ln KF+1nln Ce where K L (L/mg) is the Langmuir adsorption equilibrium constant and q m (mg/g) is the maximum adsorption capacity. K F ((mg/g) (L/mg) 1/ n ) and 1/ n are Freundlich constants.…”

Section: Resultsmentioning

confidence: 99%

“…The rapid development of modern industry brings wealth to society, but it also causes damage to the environment at the same time. Heavy metal ion pollution is particularly serious, which is mainly induced by unscrupulous discharge sewage of industrial effluent without treatment [1]. Industrial waste water contains a variety of harmful heavy metal ions, such as lead ions, cadmium ions and chromium ions, which will exist in the biosphere for a long time and endanger the environment [2].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Poly(arylene ether nitrile) Porous Membrane with High Pb(II) Adsorption Performance

Liu

Zhou

et al. 2019

Polymers

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Porous materials with high specific surface area possess a broad application prospect in the treatment of wastewater. In this work, sulfonated poly(arylene ether nitrile) (SPEN) functionalized with a carboxylic acid group was successfully synthesized, which was subsequently transformed into SPEN porous membranes with cetyltrimethyl ammonium bromide (CTAB) as pore-forming agents to study the adsorption performance for lead ions in aqueous solution. Then, experiments were conducted to investigate the effect of pH, contact time and initial solution concentration on the adsorption performance of porous membranes, and the adsorption capacities of porous membranes with different content (0, 5 and 15 wt %) of CTAB were 183.60, 161.73 and 127.43 mg/g, respectively, which manifested that the adsorption capacity decreased with the increase of CTAB. The adsorption capacities of porous membranes increased with the increase of the initial concentration of lead ions, and the maximum reached was 246.96 mg/g. The simulation of adsorption kinetics revealed that the adsorption was accorded with the pseudo-second-order kinetic model and Langmuir equation, indicating that the adsorption process followed Langmuir monolayer adsorption. Thermogravimetric analysis demonstrated that the porous membranes had excellent thermodynamic properties both before and after adsorption. In addition, the change of adsorption peak in the Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) spectrum indicated that the absorption performance of porous membranes for lead ions benefited from the chelation between lead ions and the carboxylic acid group on SPEN. Moreover, the porous membranes maintained excellent adsorption properties after circulating five times under the conditions of acidic or alkaline, and the cycle regeneration effect was outstanding.

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“…Both HCl and HNO 3 could be used to elute the heavy metal from the adsorbents [37]. Since HCl might interfere with the amino group in the adsorbent, HNO 3 was used to treat the adsorbents [38]. The rejuvenated adsorbents of AF‐MnP, AF‐MnP‐L1, and AF‐MnP‐L2 were used in the subsequent cycles, and the adsorption capacity of Cr(VI) ions after each cycle was measured using AAS.…”

Section: Resultsmentioning

confidence: 99%

Integration ofCynodon dactylonandMuraya koenigiiplant extracts in amino‐functionalised silica‐coated magnetic nanoparticle as an effective sorbent for the removal of chromium(VI) metal pollutants

Vishnu¹,

Dhandapani²

2020

IET nanobiotechnol.

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Immobilised magnetic nanoparticles are extensively used owing to their superparamagnetic nature, surface interaction, and binding specificity with the appropriate portentous substances. The present research focuses on the development of a portentous, robust carrier, which integrates the silica-coated amino-functionalised magnetic nanoparticle (AF-MnP) with the plant extracts of Cynodon dactylon (L1) and Muraya koenigii (L2) for the stable and enhanced removal of hazardous hexavalent chromium pollutant in the wastewater. Vibrating sample magnetometer (M s-45 emu/g) determines the superparamagnetic properties; Fourier-transform infrared spectroscopy determines the presence of functional groups such as NH 2 , Si-O-Si, C=C; high-resolution transmission electron microscopy, field emission scanning electron microscope and energydispersive X-ray spectroscopy determine the size of the green adsorbents in the range of 20 nm and the presence of elements such as Fe, N, and Si determines the efficacy of the synthesised silica-coated AF-MnP. The AF-MnP-L1 shows the maximum adsorption capacity of 34.7 mg/g of sorbent calculated from the Langmuir isotherm model and the process follows pseudosecond-order kinetics. After treatment, the adsorbents can be easily separated from the solution in the presence of an external magnetic field and are reused for nine cycles after acid treatment with the minimal loss of adsorption efficiency.

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Preparation and characterization of amino/thiol bifunctionalized magnetic nanoadsorbent and its application in rapid removal of Pb (II) from aqueous system

Cited by 66 publications

References 28 publications

Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

Functionalized Poly(arylene ether nitrile) Porous Membrane with High Pb(II) Adsorption Performance

Integration ofCynodon dactylonandMuraya koenigiiplant extracts in amino‐functionalised silica‐coated magnetic nanoparticle as an effective sorbent for the removal of chromium(VI) metal pollutants

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