Effective removal of Pb2+ from aqueous solutions by magnetically modified zeolite

Yuan, Mingliang; Xie, Tangfeng; Gao, Yan; Chen, Qichao; Wang, Long

doi:10.1016/j.powtec.2018.03.043

Cited by 44 publications

(23 citation statements)

References 24 publications

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“…Increasing fraction of Fe3O4 shows more particles covering the big phase of the zeolite. The similar finding was also reported previously (Yuan et al, 2018). This provides evidence that Fe3O4 has layered the zeolite, and this well fits with the XRD and FTIR data.…”

Section: Surface Characterssupporting

confidence: 92%

“…Recently, such problem has been solved by using separable adsorbents prepared by coating the adsorbent with magnetic material such as magnetite (Fe3O4). The magnetization of several adsorbents including activated carbon (Altıntıg et al, 2017), clay (Ge at al., 2019 ), and zeolites (Javanbakht et al, 2017;Khodadadi et al, 2017;Mohseni-Bandpi et al, 2016;Yuan et al, 2018) has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Of the adsorbents, zeolite have received considerable attention for contaminant removal due to its large surface area and high stability (Saputra et al, 2017;Yuan et al, 2018). Zeolites are hydrated aluminosilicate crystalline solids with very regular microporous structures, enclosing interconnected cavities, in which the various contaminant ions and water molecules are captured (Javanbakht et al, 2017;Khodadadi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Removal of methylene blue dye in water by using recoverable natural zeolite/Fe3O4 adsorbent

2021

Global NEST: The International Journal

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<p>In this paper, the low-cost and practical adsorption for removing methylene blue (MB) dye has been developed by using recoverable natural zeolite that was magnetized with Fe3O4. The magnetization was conducted by co-precipitation technique. The adsorbents obtained from the magnetization were characterized by XRD, FTIR, surface area analyzer and turbidity meter machines. The MB adsorption on the recoverable adsorbent was performed by batch experiment. The effect of Fe3O4 fraction on adsorbent characters, recoverability, and adsorption ability was evaluated. The adsorption kinetic and isotherm were also determined. The research results attributed that recoverable zeolite/Fe3O4 adsorbent has been successfully produced. It was found that the increase of Fe3O4 fraction in the adsorbent, has improved the recoverability, but in the same time, it caused the adsorption decreased. The fraction of Fe3O4 as much 33.30%w displayed compromisingly good capacity and recoverability. The maximum MB dye adsorption was reached by a condition of 0.25 g L-1 of the adsorbent dose, pH 8, and in 60 mins of the contact time The adsorption kinetic well fitted with pseudo second-order with the adsorption rate of 0.0238 mg g-1 min-1. The adsorption strongly agreed with the Langmuir isotherm with adsorption capacity of 32.258 mg g-1 .</p>

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Section: Surface Characterssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of methylene blue dye in water by using recoverable natural zeolite/Fe3O4 adsorbent

2021

Global NEST: The International Journal

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“…During the past decades, heavy metals contamination of surface and underground water poses a significant threat to humans and aquatic organisms because they cause high carcinogenicity and toxicity [1]. These toxic and non-biodegradable metals tend to exist persistently in the ecosystem and accumulate quickly in the organism, such as human bodies, when they exceed the permissible limit [2,3]. Cu(II) and Pb(II) are among these most toxic metals.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Cauliflower Leaves Biochar at Low Temperature in the Air Atmosphere for Cu(II) and Pb(II) Removal from Water

Tian

Moeen

et al. 2020

Materials

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In this study, a facile and low-cost method for biochar (CLB) preparation from vegetable waste (cauliflower leaves) was developed at a low temperature (120 °C) in the air atmosphere. The prepared mechanism, adsorption mechanism, and performance of CLB for Cu(II) and Pb(II) sorption were investigated using Scanning electron microscopy- energy dispersive X-ray spectroscopy(SEM-EDS), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FTIR), and a series of sorption experiments. Then the CLB was subjected to single and double element sorption studies to examine the effect of pH value on the Cu(II)/Pb(II) sorption capacities and then competitive sorption priority. There are both more hydroxyl (–OH) and carboxyl (–COOH) functional groups on the surface of CLB compared to those from control (without H3PO4 impregnation), resulting in more ion exchanges and complexation reaction for CLB with Cu(II) and Pb(II). Besides, the phosphorus-containing groups (e.g., P = OOH, P = O.), which newly formed with H3PO4 impregnation, could also enhance sorption, especially for Pb(II), this way leaded to its adsorption and precipitation as Pb5(PO4)3OH crystals. The performance of maximum adsorption capacities of CLB toward Cu(II) and Pb(II) were 81.43 and 224.60 mg/g, respectively. This sorption was slightly pH-dependent, except that the sorption capacity improved significantly as the pH value of the solution increased from 2 to 4. Competitive sorption experiment confirmed that Pb(II) had a higher sorption priority than Cu(II).

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“…[6][7][8][9][10] In such methods, adsorption was recognized as the most effective and applicable method for the removal of heavy metal ions from wastewater. Over the past few decades, researchers have developed a number of adsorptive materials for heavy metal wastewater treatment, such as zeolite, 11,12 activated carbon, 13 chitosan, 14 humic acid, 15 and sawdust. 16 Unfortunately, these adsorbents still have certain limitations when it comes to their practical application, such as low efficiency, high cost, sludge production, and poor reproducibility.…”

Section: Introductionmentioning

confidence: 99%

Characterization and adsorption properties of cross-linked yeast/β-cyclodextrin polymers for Pb(ii) and Cd(ii) adsorption

Duan

Song

et al. 2018

RSC Adv.

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Effective removal of Pb2+ from aqueous solutions by magnetically modified zeolite

Cited by 44 publications

References 24 publications

Removal of methylene blue dye in water by using recoverable natural zeolite/Fe3O4 adsorbent

Removal of methylene blue dye in water by using recoverable natural zeolite/Fe3O4 adsorbent

Facile Synthesis of Cauliflower Leaves Biochar at Low Temperature in the Air Atmosphere for Cu(II) and Pb(II) Removal from Water

Characterization and adsorption properties of cross-linked yeast/β-cyclodextrin polymers for Pb(ii) and Cd(ii) adsorption

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