Pb(II) removal and its adsorption from aqueous solution using zinc oxide/graphene oxide composite

Ahmad, Siti Zu Nurain; Salleh, Wan Norharyati Wan; Yusop, Mohd Zamri Mohd; Hamdan, Rafidah; Awang, Nor Asikin; Ismail, Nor Hafiza; Rosman, Nurafiqah; Sazali, Norazlianie

doi:10.1080/00986445.2020.1715957

Cited by 24 publications

(17 citation statements)

References 50 publications

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“…Fig. 7 c also shown that, the maximum Pb (II) adsorption capacity qmax values of ZS30 is higher than some other reports [2,3,21,22].…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 55%

Green Synthesis of ZnO Nanoparticles using Piper chaudocanum L. Leaf Extract: Characterization and its Application in Pb (II) Adsorption

Tam¹,

Thom²,

Tuan³

2022

NST

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In this study, Zinc oxide nanoparticles (ZnO NPs) were green synthesized using Piper chaudocanum L. (PC) leaf extract by sol-gel method and used as an adsorbent for the removal of Pb (II) ions from aqueous solution. The synthesized ZnO NPs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Ultraviolet - visible spectroscopy (UV-Vis) and Brunauer - Emmet - Teller (BET). The results revealed high purity and wurtzite hexagonal structure of ZnO NPs in the size range of 28-37 nm. The morphology of the ZnO NPs varies in different polycrystalline aggregates depending on the amount of extract used, from nanorods to NPs clusters with a BET surface area of 8.56 m2g-1. Pb (II) ion adsorption was investigated at different pH, contact time, initial metal ion concentration, adsorbent dose and temperature. ZnO NPs were synthesized using 30 mL PC leaf extract (ZS30) is the best Pb (II) absorbent. The adsorption isotherm was well described by Langmuir (at low concentration of Pb (II)) and Freundlich isotherm model (at higher concentration of Pb (II)). The adsorption process follows pseudo-second-order reaction kinetic with a high regression coefficient. The calculated thermodynamic parameters, ΔGo (between - 8.699 and - 7.569 kJ/mol at 298 - 316 K), ∆Ho (-20.085 kJ/mol) showed that the adsorption of Pb (II) on ZS30 surface was feasible, spontaneous and exothermic, respectively. The first layer absorption is chemisorption while the next layers are physical adsorption.

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“…Fig. 7 c also shown that, the maximum Pb (II) adsorption capacity qmax values of ZS30 is higher than some other reports [2,3,21,22].…”

Section: Adsorption Isotherm Modelingmentioning

confidence: 55%

Green Synthesis of ZnO Nanoparticles using Piper chaudocanum L. Leaf Extract: Characterization and its Application in Pb (II) Adsorption

Tam¹,

Thom²,

Tuan³

2022

NST

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“…Also, these composites adsorbents have better efficiency for water treatments due to the presence of various kinds of active sites for pollutant uptake, especially when composed of inorganic and organic sites 16 . Furthermore, among nanocomposite adsorbents, zinc oxide (ZnO) NPs composites have been reported to be highly efficient for the treatment of dye polluted water 17 – 23 . However, these hybrids are mainly a combo of ZnONPs with materials like activated carbon, graphene oxide, chitosan, graphene, polyaniline, and clay minerals 17 , 20 , 24 – 28 .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, among nanocomposite adsorbents, zinc oxide (ZnO) NPs composites have been reported to be highly efficient for the treatment of dye polluted water 17 – 23 . However, these hybrids are mainly a combo of ZnONPs with materials like activated carbon, graphene oxide, chitosan, graphene, polyaniline, and clay minerals 17 , 20 , 24 – 28 . Despite the desirable characteristics of biosorbents mentioned, there is presently no report on the combination of ZnONPs with biomass for water treatment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and regeneration of an inorganic–organic nanocomposite (ZnO@biomass) and its application in the capture of cationic dye

Akpomie

Conradie

2020

Sci Rep

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Despite the efficiency of ZnO nanoparticle (NPs) composite adsorbents in the adsorption of various pollutants, there is presently no report on the combo of Znonps with biomass for adsorption. Besides, there is a dearth of information on the biosorption of celestine blue (ceB), a dye used in the nuclear and textile industry. in this study, biogenic-chemically mediated synthesis of a composite (Zno@Acp) was prepared by the impregnation of Znonps onto Ananas comosus waste (Acp) for the adsorption of ceB. the SeM, eDX, ftiR, XRD, Bet, and tGA characterizations showed the successful presence of Znonps on the biomass to form a nanocomposite. the uptake of ceB was enhanced by the incorporation of ZnONPs on ACP. A faster CEB adsorption onto ZnO@ACP (120 min) compared to ACP (160 min) was observed. The Langmuir (R 2 > 0.9898) and pseudo-second-order (R 2 > 0.9518) models were most appropriate in the description of the adsorption process. the impregnation of Znonps onto the biomass enhanced the spontaneity of the process and displayed endothermic characteristics. High CEB desorption of 81.3% from the dye loaded ZnO@ACP as well as efficient reusability showed the efficacy of the prepared nanocomposite for CEB adsorption. The pollution of environmental water from industrial effluents contaminated with industrial by-products is on the rise. This is attributed to the rapid growth of industries, hence the increase in industrial activities across the globe. About 700,000 tons of over 100,000 commercial dyes are produced annually in industries, which makes dye the most common water pollutant 1. Most dyes are used in the textile and paper industries and are frequently encountered in the effluents subsequently released into the environment 2,3. These dyes present in the environmental waters can be carcinogenic, mutagenic, and result in chronic illnesses in humans and aquatic organisms 3,4. Apart from that, they reflect or absorb light entering the water thus hindering the photosynthetic activity of aquatic plants 1. Therefore, the removal of dyes from wastewater is necessary to abate their harmful effects on the ecosystem 5,6. Most dye removal studies have focused on the removal of dyes such as methylene blue, congo red, malachite green, rhodamine B, methyl orange, methyl violet, reactive black, basic blue, acid yellow, brilliant green, and crystal violet 7,8. However, research on the removal of celestine blue (CEB) is rare despite the wide use of CEB in the nuclear and textile industries. Therefore, the removal of CEB from wastewater is important. Several techniques have been harnessed for the remediation of dye-polluted water, such as filtration, coagulation, oxidation, precipitation, reduction, photocatalytic degradation, solvent extraction, and adsorption 9. The adsorption technique is the most efficient and adsorption on bio-waste (biosorption) is promising due to the simplicity, low cost, degradability, reusability, and efficiency 10. Hence, the use of several bio-waste for the biosorption of dyes has received much attention,...

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“…Equilibrium solution pH of adsorbent was measured by a portable pH meter. In the Pb(II) adsorption process, alkaline pH should be avoided as precipitation occurs instead of adsorption, therefore above the pH 6.00 were not studied [42].…”

Section: Pb(ii) Adsorption Evaluations On Synthesized Adsorbentsmentioning

confidence: 99%

“…Researchers have reported extensive studies for the removal of Pb(II) ions from aquatic environments and various methods such as ion exchange, membrane filtration, electrodeposition, and coagulation have been studied [17,18] Adsorption is one of the most preferred methods among them thanks to its simple operation, low cost and applicable in large scale [19,20]. Various type of adsorbents has been used to remove Pb(II) ions from aquatic environments such as zeolites [21], activated carbon [22], carbon aerogel [23], manganese oxide-coated carbon nanotubes [24], chitosan/ magnetite composite beads [25], olive cake [26] etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

Kaptanoglu

Yusan

2022

Environmental Research and Technology

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Graphene oxide (GO) and reduced graphene oxide (rGO) are efficient and low-cost adsorbent carbon-based materials for removing Pb(II) ions from wastewater. This study focuses on the synthesizing GO and rGO by green methods with Tour approach and reduction with L-ascorbic acid, respectively and were characterized by X-ray diffraction, Fourier transform infra-red spectroscopy, Raman spectroscopy and scanning electron microscopy with energy dispersive X-ray spectroscopy. The prepared GO and rGO were used to adsorb Pb(II) ions from aqueous solutions. From the adsorption isotherms, the maximum adsorption capacities of Pb(II) ions on GO and rGO calculated from the Langmuir (117.6 mg/g) and Dubinin–Radushkevich isotherms (138.5 mg/g), respectively, higher than reported studies in the literature. By thermodynamic investigation, it was found that the adsorption of Pb(II) ions on GO and rGO was spontaneous and exothermic.

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Pb(II) removal and its adsorption from aqueous solution using zinc oxide/graphene oxide composite

Cited by 24 publications

References 50 publications

Green Synthesis of ZnO Nanoparticles using Piper chaudocanum L. Leaf Extract: Characterization and its Application in Pb (II) Adsorption

Green Synthesis of ZnO Nanoparticles using Piper chaudocanum L. Leaf Extract: Characterization and its Application in Pb (II) Adsorption

Synthesis, characterization, and regeneration of an inorganic–organic nanocomposite (ZnO@biomass) and its application in the capture of cationic dye

Adsorption performance of Pb(II) ions on green synthesized GO and rGO: Isotherm and thermodynamic studies

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