Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO
Partially reduced graphene oxide-Fe 3 O 4 composite was prepared through in situ co-precipitation and used as an efficient adsorbent for removing Pb(II) from water. The composites were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectra,...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2018-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617417744402 |
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| author | Ting Guo Chaoke Bulin Bo Li Zhiwei Zhao Huitao Yu He Sun Xin Ge Ruiguang Xing Bangwen Zhang |
| author_facet | Ting Guo Chaoke Bulin Bo Li Zhiwei Zhao Huitao Yu He Sun Xin Ge Ruiguang Xing Bangwen Zhang |
| author_sort | Ting Guo |
| collection | DOAJ |
| description | Partially reduced graphene oxide-Fe 3 O 4 composite was prepared through in situ co-precipitation and used as an efficient adsorbent for removing Pb(II) from water. The composites were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectra, Fourier transformation infrared, Raman spectrometer, N 2 adsorption–desorption, vibrating sample magnetometer, and zeta potential analyses. The impacts of pH, contact time, adsorbent dosage, temperature, and foreign substances on Pb(II) adsorption performance were investigated. The adsorption mechanism, kinetics, and thermodynamics were analyzed. The results indicate that Fe 3 O 4 is homogeneously anchored inside the thin graphene sheets, with a particle size of 15–20 nm, resulting in a very low remanence and coercivity. The composite shows excellent and efficient adsorption performance toward aqueous Pb(II): adsorption equilibrium was reached in 10 min with the adsorption percent and quantity of 95.77% and 373.14 mgċg −1 , respectively, under a condition of pH = 6, adsorbent dosage 250 mgċL −1 , and Pb(II) initial concentration 97.68 mgċL −1 , with the subsequent magnetic separation taking only 10 s. The adsorption performance is dependent on adsorbent dosage. A lower dosage favors a higher adsorption quantity, implying a strong adsorptive potential for partially reduced graphene oxide-Fe 3 O 4 . The adsorption quantity reached 777.28 mgċg −1 , given the dosage 100 mgċL −1 . The adsorption is monolayer chemisorption, the whole process of which is controlled by chemisorption and liquid film diffusion. In terms of thermodynamics, the adsorption is an exothermic and spontaneous process. |
| format | Article |
| id | doaj-art-e547c25f528d4f07ae4ee57e77cf1679 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2018-05-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-e547c25f528d4f07ae4ee57e77cf16792025-02-03T10:08:01ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382018-05-013610.1177/0263617417744402Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeOTing GuoChaoke BulinBo LiZhiwei ZhaoHuitao YuHe SunXin GeRuiguang XingBangwen ZhangPartially reduced graphene oxide-Fe 3 O 4 composite was prepared through in situ co-precipitation and used as an efficient adsorbent for removing Pb(II) from water. The composites were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectra, Fourier transformation infrared, Raman spectrometer, N 2 adsorption–desorption, vibrating sample magnetometer, and zeta potential analyses. The impacts of pH, contact time, adsorbent dosage, temperature, and foreign substances on Pb(II) adsorption performance were investigated. The adsorption mechanism, kinetics, and thermodynamics were analyzed. The results indicate that Fe 3 O 4 is homogeneously anchored inside the thin graphene sheets, with a particle size of 15–20 nm, resulting in a very low remanence and coercivity. The composite shows excellent and efficient adsorption performance toward aqueous Pb(II): adsorption equilibrium was reached in 10 min with the adsorption percent and quantity of 95.77% and 373.14 mgċg −1 , respectively, under a condition of pH = 6, adsorbent dosage 250 mgċL −1 , and Pb(II) initial concentration 97.68 mgċL −1 , with the subsequent magnetic separation taking only 10 s. The adsorption performance is dependent on adsorbent dosage. A lower dosage favors a higher adsorption quantity, implying a strong adsorptive potential for partially reduced graphene oxide-Fe 3 O 4 . The adsorption quantity reached 777.28 mgċg −1 , given the dosage 100 mgċL −1 . The adsorption is monolayer chemisorption, the whole process of which is controlled by chemisorption and liquid film diffusion. In terms of thermodynamics, the adsorption is an exothermic and spontaneous process.https://doi.org/10.1177/0263617417744402 |
| spellingShingle | Ting Guo Chaoke Bulin Bo Li Zhiwei Zhao Huitao Yu He Sun Xin Ge Ruiguang Xing Bangwen Zhang Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO Adsorption Science & Technology |
| title | Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO |
| title_full | Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO |
| title_fullStr | Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO |
| title_full_unstemmed | Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO |
| title_short | Efficient removal of aqueous Pb(II) using partially reduced graphene oxide-FeO |
| title_sort | efficient removal of aqueous pb ii using partially reduced graphene oxide feo |
| url | https://doi.org/10.1177/0263617417744402 |
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